The rheological properties of the bituminous components （bitumen and bituminous mastic） within asphalt mixtures contribute significantly to the major distresses of flexible pavements （i.e. rutting, fatigue and low ...The rheological properties of the bituminous components （bitumen and bituminous mastic） within asphalt mixtures contribute significantly to the major distresses of flexible pavements （i.e. rutting, fatigue and low temperature cracking）. Asphalt mixtures are usually composed of mastic-coated aggregates rather than pure bitumen-coated aggre- gates. The purpose of this study is to investigate the effects of mineral fillers on the theological behaviour of several polymer-modified bitumens （PMBs） through laboratory mixing. A neat bitumen and two types of polymers （elastomeric and plastomeric） were used to produce PMBs, and two fillers with different minerals （limestone and basalt） were selected to obtain mastics. The dynamic shear rheometer （DSR） and bending beam rheometer （BBR） were used to characterize the theological properties of PMBs and mastics. In particular, multiple stress creep recovery （MSCR） tests were performed to evaluate the rutting potential at high temperatures, whereas BBR tests were carried out to investigate the low temperature behaviour of these materials. BBR results for unmodified mastics show that the increase of stiffness is similar regardless of the filler type, whereas results for polymer-modified mastics indicate that the degree of stiffening depends on the combi- nation of filler/polymer types. MSCR results show that adding filler leads to a reduced susceptibility of permanent deformation and an enhanced elastic response, depending on the combination of filler/polymer types. Overall results suggest that a physical-chemical interaction between the filler and bitumen occurs, and that the interaction level is highly dependent on the type of polymer modification.展开更多
By selecting different types of polymer mixing into concrete, the toughness of concrete is investigated, and results indicate polymer has obvious effect to improve the toughness of concrete. Microstructure of polymer-...By selecting different types of polymer mixing into concrete, the toughness of concrete is investigated, and results indicate polymer has obvious effect to improve the toughness of concrete. Microstructure of polymer-modified concrete were studied through environment scanning electron microscope and digital micro-hardness tester, results show that polymer acts as a flexible filler and reinforcement in concrete, and alters the microstructure at mortar and ITZ. By crack path prediction and energy consumption analysis, the crack path of polymer-modified concrete is more tortuous and consumes more energy than that of ordinary concrete.展开更多
In order to determine a proper compaction temperature that affects the workability and compactibility of the polymer-modified asphalt（PMA）, the effect of compaction temperature was examined on the volumetric propert...In order to determine a proper compaction temperature that affects the workability and compactibility of the polymer-modified asphalt（PMA）, the effect of compaction temperature was examined on the volumetric properties and the compaction energy indices. Change in compaction temperature shows an important influence on the maximum specific gravity of mixture（G_（mm）） by internal volume change of PMA. The change in G_（mm） mainly affects the effective volume of the aggregate（V_（Eff））. Reduction in V_（Eff） from Zero shear viscosity（ZSV） to superpave temperature allows 0.1%-0.15% of the asphalt binder to occupy highly the external voids of aggregates. The volumetric properties for all compaction specimens meet superpave criteria, but the energy efforts were the lowest at ZSV temperature. Lower energy efforts at the ZSV temperature reflect easier compaction than those at excessively high temperature. Clearly, excessive compaction temperature may not be necessary to improve the compactibility and to reduce the compaction efforts.展开更多
Adding compatibilizer to polymer-modified asphalt(PMA)is an effective method to improve compatibility and performance.However,only few studies have systematically focused on how compatibilizer can affect the performan...Adding compatibilizer to polymer-modified asphalt(PMA)is an effective method to improve compatibility and performance.However,only few studies have systematically focused on how compatibilizer can affect the performance of styrene-butadiene-styrene(SBS)polymer-modified asphalt(PMA).In this study,six compatibilizers with different compositions were used to prepare SBS PMA samples.Conventional performance,viscosity-temperature characteristics,viscoelastic behavior,creep properties,and morphology were investigated.The results show that adding compatibilizer to SBS PMA has a great effect on its performance.High aromatics content in compatibilizers can improve the high-temperature performance of SBS PMA,while a high saturates content can enhance the low-temperature performance.Additionally,high aromatics content in compatibilizer can increase the temperature sensitivity.While the aromatics content does improve the compatibility of SBS PMA to some extent,adding compatibilizer to SBS PMA has few effects on the microstructure.Judging from our test results,we can conclude that the optimum aromatics content for adding compatibilizer to SBS PMA ranges from 33.21%to 54.22%.展开更多
The Tangjiashan lead-zinc deposit,located on the southwestern margin of the Sichuan Basin,is rich in bitumen,and the lead-zinc ore and bitumen coexist closely,indicating a close genetic relationship between lead-zinc ...The Tangjiashan lead-zinc deposit,located on the southwestern margin of the Sichuan Basin,is rich in bitumen,and the lead-zinc ore and bitumen coexist closely,indicating a close genetic relationship between lead-zinc mineralization and hydrocarbon reservoir formation.However,whether bitumen shares the same source as the current gas reservoirs within the basin or other destroyed gas reservoirs along the basin margins remains unknown.Here,we conducted an organic geochemical analysis of bitumen in this deposit and identified the sources of hydrocarbons by comparing biomarker compounds with those of potential source rocks.The authors found that the bitumen in the Tangjiashan lead-zinc deposit has good comparability with the hydrocarbon source rocks of the Cambrian Qiongzhusi Formation,suggesting that the primary sources of oil in this ancient hydrocarbon reservoir are muddy source rocks of the Qiongzhusi Formation.This research is important for enhancing the understanding of the genetic connection between lead-zinc mineralization and hydrocarbon formation,providing crucial insights for strategies to explore both metal ores and hydrocarbons and advancing the geological understanding of petroleum systems in the Sichuan Basin.展开更多
Rubbery waste at the end of the cycle often constitutes a threat for the environment because of their encumbrance and low biodeterioration.The purpose of the research presented is to develop the rubber fine powder as ...Rubbery waste at the end of the cycle often constitutes a threat for the environment because of their encumbrance and low biodeterioration.The purpose of the research presented is to develop the rubber fine powder as a pavement.It is interested primarily in the behavior of two types of bitumen 40/50 modified by the addition of two varieties of rubber fine powders of different grading,resulting from the crushing of the rubbery products intended for the clothes industry of soles of shoes.The objective of the experimentation is to study the influence of the added polymer on the physical properties of the ordinary road bitumen with the incorporation of the fine powder.The experimental approach is carried out using the two tests of characterization of the bitumen i.e.the softening point test and the penetration test which remain the most used to define and classify the road bitumen.It will be noted however,that the experimental investigation which is based on several tests according to the type and the content of fine powders,leads on a whole of interesting correlations.展开更多
RDV■(dynamic vasoactive reactor)chemical technology represents a disruptive innovation operating under both surface and downhole conditions,producing irreversible and in situ adaptable effects.It has demonstrated tra...RDV■(dynamic vasoactive reactor)chemical technology represents a disruptive innovation operating under both surface and downhole conditions,producing irreversible and in situ adaptable effects.It has demonstrated transformative capacity across crude oils of various API gravities,with notable impact on extra-heavy crudes and bitumens,through a mechanism based on targeted proton donation that induces selective protonation of polar structures,generating transient carbocations that catalyze molecular fragmentation.This work presents a comprehensive analysis of the effects of RDV-DMG001■treatment(currently named RDV-01L■)on bitumen samples from the Primrose field,Alberta,Canada,using capillary chromatography,SARA analysis,and rheological evaluation,complemented with comparative data on prior applications of RDV-01L■in extra-heavy crudes from Venezuela(Boscán and El Salto).Results for Primrose bitumen show an 85%reduction in viscosity(from 500,000 to 75,000 cP),an increase in API gravity from 8.5 to 15.0(+76.4%),and molecular redistribution toward medium-chain hydrocarbons(C_(13)-C_(16)),with increases in molar and mass fractions up to 39.1%and 62.3%,respectively.SARA analysis confirmed fragmentation of asphaltenes(2.0%mass reduction)and a 5.8%increase in resins,improving colloidal stability and lowering precipitation risk.These changes align with RDV■’s mechanism of action based on carbocation generation.Notably,in field conditions-which are more dynamic and energetically favorable-RDV■treatment efficacy tends to exceed laboratory results,due to synergy among temperature,pressure,and fluid flow gradients which accelerate and enhance protonation and molecular fragmentation.Validated in contexts of advanced chemical transformation(Venezuela,Canada),the technology enables substantial improvements in fluidity,transport,processing,and recovery,with significant potential for annual cost savings in extraction and processing.This study positions RDV■as a disruptive,irreversible,and in situ adaptable chemical solution superior to conventional technologies such as surfactants,nanocatalysts,or aquathermolysis.RDV■is a quantum-impact chemical technology operating via molecular protonation reactions and controlled carbocation formation.The term“quantum”is used here as a conceptual analogy to describe the magnitude and specificity of the molecular reconfiguration induced by RDV■,without asserting direct experimental evidence of quantum reactivity.展开更多
To satisfy the increasing global energy demand,while searching for new energy sources,it’s important to take a closer look at the resources already at our disposal and optimize their use.This comprehensive review exp...To satisfy the increasing global energy demand,while searching for new energy sources,it’s important to take a closer look at the resources already at our disposal and optimize their use.This comprehensive review explores the evolving landscape of unconventional oil resources,focusing on the environmental and economic implica-tions of bitumen partial upgrading technologies,particularly within the Canadian context.With over 55%of the world’s oil reserves comprising of unconventional oil,which includes extra-heavy oil and oil sand bitumen,there is a growing trend to shift from traditional oil sources to these abundant yet under-utilized reserves.This review delves into the challenges and advancements in bitumen partial upgrading,highlighting the latest technologies in thermal cracking,hydrocracking,catalytic cracking,and innovative methods like surfactant integration,cavi-tation,microwave,and plasma-assisted upgrading.It also discusses the environmental implications and eco-nomic feasibility of these technologies,emphasizing the necessity for sustainable and cost-effective solutions at petroleum field sites.Furthermore,the report introduces the transformative concept of Bitumen Beyond Com-bustion(BBC),which explores the non-combustion uses of bitumen and its asphaltene fraction in manufacturing high-value carbon-based products.These novel approaches align with global sustainability goals,offering the potential for significant reductions in greenhouse gas emissions and new routes to diversify the economic ap-plications of bitumen.The review then concludes with an assessment of current challenges and future research directions,advocating for a balanced approach that harmonizes technological innovation,environmental stewardship,and economic viability in the field of bitumen upgrading.展开更多
Using a Hamburg wheel-track test device, the resistance to rutting of Gussasphalt is tested and compared. Gussasphalt with hard bitumen has good resistance to rutting. The related resistance abilities to cracking at ...Using a Hamburg wheel-track test device, the resistance to rutting of Gussasphalt is tested and compared. Gussasphalt with hard bitumen has good resistance to rutting. The related resistance abilities to cracking at low temperature of Gussasphalt are tested and compared through flexural experiments and the composite structure fatigue test with temperature dropping. Gussasphalt with high performance polymer modified bitumen has a longer fatigue life and a lower breaking temperature; they can be used in the future surfaces for steel bridge decks in Germany.展开更多
In this paper morphology of APP modified bitumen (APP MB) and SBS modified bitumen (SBS MB) was studied by scanning elecron microscopy (SEM) and the morphology property relationship of these two modified bitumen (MB) ...In this paper morphology of APP modified bitumen (APP MB) and SBS modified bitumen (SBS MB) was studied by scanning elecron microscopy (SEM) and the morphology property relationship of these two modified bitumen (MB) was discussed. The results indicate that the APP MB systems is in a homogeneous phase structure and the SBS MB system is in a heterogeneous phase structure. Improvement of bituminous physical properties by APP and SBS is closely related with the microstructure of APP and SBS MB.展开更多
Bitumen was modified with desulfurized crumb rubber (DCR) in the present of reac tive additives. The effect of the kinds and content of the reactive additive on prop erties of DCR modified bitumen (DCRMB) was investi...Bitumen was modified with desulfurized crumb rubber (DCR) in the present of reac tive additives. The effect of the kinds and content of the reactive additive on prop erties of DCR modified bitumen (DCRMB) was investigated. The morphology of DCRMB was characterized by SEM and the changes of the chemical structure of DCRMB wit hout and with the addition of the reactive additive were analyzed by FTIR. The e xperimented results show that the softening point,the elasticity recovery and th e storage stability of DCRMB were improved significantly by the addition of the reactive additive. This is because that a network structure of rubber in DCRMB w as formed and the chemical reaction between C=C double bonds in bitumen and DCR has happened after the reactive additive was added into DCRMB.展开更多
Layered double hydroxides(LDHs) with the physical property of high ultraviolet(UV)reflectance were used to enhance the anti-UV aging performance of bitumen. In view of the poor compatibility of LDHs with bitumen, thre...Layered double hydroxides(LDHs) with the physical property of high ultraviolet(UV)reflectance were used to enhance the anti-UV aging performance of bitumen. In view of the poor compatibility of LDHs with bitumen, three organic anions, namely, sodium dodecyl benzenesulfonate(SDBS), sodium dodecyl sulfate(SDS) and sodium dodecyl sulfonate(SDSO), were used as modifiers to prepare organic LDHs(OCLDHs) through regeneration process, and the crystal structure, chemical composition, morphological feature and UV shielding capability of synthesized OCLDHs were analyzed. Then the OCLDHs were added into bitumen to evaluate the storage stability and anti-UV aging property of OCLDHs/bitumen composites.The results show that the organic anions are inserted into the interlayers of LDHs, the intercalation expands the interlayer distance of LDHs, makes the particle shapes become more irregular and complicated, and enhances the absorption ability within the range from 200 to 300 nm while has little influence on the UV reflection ability.Result of high temperature storage stability indicates the organic modification ameliorates the compatibility of LDHs with bitumen. Compared with LDHs, OCLDHs decrease the deteriorations of bitumen’s properties during UV exposure test, exhibiting better effect in enhancing anti-UV aging performance of bitumen. Furthermore,among the three OCLDHs, LDHs intercalated by SDBS exhibit the most effective improvement due to the best compatibility with bitumen and comparatively good UV shielding effect.展开更多
Natural bitumen is the evolutionary residue of hydrocarbon of sedimentary organic matter. Several kinds of bitumen with different occurrences, including bitumen in source rock, migration bitumen filled in fault, oil-b...Natural bitumen is the evolutionary residue of hydrocarbon of sedimentary organic matter. Several kinds of bitumen with different occurrences, including bitumen in source rock, migration bitumen filled in fault, oil-bed bitumen and paleo-reservoir bitumen, are distributed widely in the Dabashan foreland. These kinds of bitumen represent the process of oil/gas formation, migration and accumulation in the region. Bitumen in source rock fiUed in fractures and stylolite and experienced deformation simultaneously together with source rock themselves. It indicated that oil/gas generation and expelling from source rock occurred under normal buried thermal conditions during prototype basin evolution stages prior to orogeny. Occurrences of bitumen in source rock indicated that paleo- reservoir formation conditions existed in the Dabashan foreland. Migration bitumen being widespread in the fault revealed that the fault was the main channel for oil/gas migration, which occurred synchronously with Jurassic foreland deformation. Oil-bed bitumen was the kind of pyrolysis bitumen that distributed in solution pores of reservoir rock in the Dabashan foreland depression, the northeastern Sichuan Basin. Geochemistry of oil-bed bitumen indicated that natural gas that accumulated in the Dabashan foreland depression formed from liquid hydrocarbon by pyrolysis process. However, paleo-reservior bitumen in the Dabashan forleland was the kind of degradation bitumen that formed from liquid hydrocarbon within the paleo-reservior by oxidation, alteration and other secondary changes due to paleo-reservior damage during tectonics in the Dabashan foreland. In combination with the tectonic evolution of the Dabashan foreland, it is proposed that the oil/gas generated, migrated and accumulated to form the paleo-reservoir during the Triassic Indosinian tectonic movement. Jurassic collision orogeny, the Yanshan tectonic movement, led to intracontinental orogeny of the Dabashan area accompanied by geofluid expelling and paleo-reservoir damage in the Dabashan foreland. The present work proposed that there is liquid hydrocarbon exploration potential in the Dabashan foreland, while there are prospects for the existence of natural gas in the Dabashan foreland depression.展开更多
基金supported by the Ministry of EducationUniversities and Research project"Damage and healing of innovative nano-structured and polymer-modified bituminous materials"(Grant RBFR10JOWO)under the"FIRB-Futuro in Ricerca 2010"funding program
文摘The rheological properties of the bituminous components （bitumen and bituminous mastic） within asphalt mixtures contribute significantly to the major distresses of flexible pavements （i.e. rutting, fatigue and low temperature cracking）. Asphalt mixtures are usually composed of mastic-coated aggregates rather than pure bitumen-coated aggre- gates. The purpose of this study is to investigate the effects of mineral fillers on the theological behaviour of several polymer-modified bitumens （PMBs） through laboratory mixing. A neat bitumen and two types of polymers （elastomeric and plastomeric） were used to produce PMBs, and two fillers with different minerals （limestone and basalt） were selected to obtain mastics. The dynamic shear rheometer （DSR） and bending beam rheometer （BBR） were used to characterize the theological properties of PMBs and mastics. In particular, multiple stress creep recovery （MSCR） tests were performed to evaluate the rutting potential at high temperatures, whereas BBR tests were carried out to investigate the low temperature behaviour of these materials. BBR results for unmodified mastics show that the increase of stiffness is similar regardless of the filler type, whereas results for polymer-modified mastics indicate that the degree of stiffening depends on the combi- nation of filler/polymer types. MSCR results show that adding filler leads to a reduced susceptibility of permanent deformation and an enhanced elastic response, depending on the combination of filler/polymer types. Overall results suggest that a physical-chemical interaction between the filler and bitumen occurs, and that the interaction level is highly dependent on the type of polymer modification.
基金Funded by the National Basic Research Program of China(No.2009CB623203)Scientific Research and Development Program of Ministry of Railway (No.2010GGKY02)
文摘By selecting different types of polymer mixing into concrete, the toughness of concrete is investigated, and results indicate polymer has obvious effect to improve the toughness of concrete. Microstructure of polymer-modified concrete were studied through environment scanning electron microscope and digital micro-hardness tester, results show that polymer acts as a flexible filler and reinforcement in concrete, and alters the microstructure at mortar and ITZ. By crack path prediction and energy consumption analysis, the crack path of polymer-modified concrete is more tortuous and consumes more energy than that of ordinary concrete.
文摘In order to determine a proper compaction temperature that affects the workability and compactibility of the polymer-modified asphalt（PMA）, the effect of compaction temperature was examined on the volumetric properties and the compaction energy indices. Change in compaction temperature shows an important influence on the maximum specific gravity of mixture（G_（mm）） by internal volume change of PMA. The change in G_（mm） mainly affects the effective volume of the aggregate（V_（Eff））. Reduction in V_（Eff） from Zero shear viscosity（ZSV） to superpave temperature allows 0.1%-0.15% of the asphalt binder to occupy highly the external voids of aggregates. The volumetric properties for all compaction specimens meet superpave criteria, but the energy efforts were the lowest at ZSV temperature. Lower energy efforts at the ZSV temperature reflect easier compaction than those at excessively high temperature. Clearly, excessive compaction temperature may not be necessary to improve the compactibility and to reduce the compaction efforts.
基金This work was supported by the Fundamental Research Funds for the Central Universities(B210202040)the National Natural Science Foundation of China(51708177).
文摘Adding compatibilizer to polymer-modified asphalt(PMA)is an effective method to improve compatibility and performance.However,only few studies have systematically focused on how compatibilizer can affect the performance of styrene-butadiene-styrene(SBS)polymer-modified asphalt(PMA).In this study,six compatibilizers with different compositions were used to prepare SBS PMA samples.Conventional performance,viscosity-temperature characteristics,viscoelastic behavior,creep properties,and morphology were investigated.The results show that adding compatibilizer to SBS PMA has a great effect on its performance.High aromatics content in compatibilizers can improve the high-temperature performance of SBS PMA,while a high saturates content can enhance the low-temperature performance.Additionally,high aromatics content in compatibilizer can increase the temperature sensitivity.While the aromatics content does improve the compatibility of SBS PMA to some extent,adding compatibilizer to SBS PMA has few effects on the microstructure.Judging from our test results,we can conclude that the optimum aromatics content for adding compatibilizer to SBS PMA ranges from 33.21%to 54.22%.
基金Supported by the National Natural Science Foundation of China(No.42373075).
文摘The Tangjiashan lead-zinc deposit,located on the southwestern margin of the Sichuan Basin,is rich in bitumen,and the lead-zinc ore and bitumen coexist closely,indicating a close genetic relationship between lead-zinc mineralization and hydrocarbon reservoir formation.However,whether bitumen shares the same source as the current gas reservoirs within the basin or other destroyed gas reservoirs along the basin margins remains unknown.Here,we conducted an organic geochemical analysis of bitumen in this deposit and identified the sources of hydrocarbons by comparing biomarker compounds with those of potential source rocks.The authors found that the bitumen in the Tangjiashan lead-zinc deposit has good comparability with the hydrocarbon source rocks of the Cambrian Qiongzhusi Formation,suggesting that the primary sources of oil in this ancient hydrocarbon reservoir are muddy source rocks of the Qiongzhusi Formation.This research is important for enhancing the understanding of the genetic connection between lead-zinc mineralization and hydrocarbon formation,providing crucial insights for strategies to explore both metal ores and hydrocarbons and advancing the geological understanding of petroleum systems in the Sichuan Basin.
文摘Rubbery waste at the end of the cycle often constitutes a threat for the environment because of their encumbrance and low biodeterioration.The purpose of the research presented is to develop the rubber fine powder as a pavement.It is interested primarily in the behavior of two types of bitumen 40/50 modified by the addition of two varieties of rubber fine powders of different grading,resulting from the crushing of the rubbery products intended for the clothes industry of soles of shoes.The objective of the experimentation is to study the influence of the added polymer on the physical properties of the ordinary road bitumen with the incorporation of the fine powder.The experimental approach is carried out using the two tests of characterization of the bitumen i.e.the softening point test and the penetration test which remain the most used to define and classify the road bitumen.It will be noted however,that the experimental investigation which is based on several tests according to the type and the content of fine powders,leads on a whole of interesting correlations.
文摘RDV■(dynamic vasoactive reactor)chemical technology represents a disruptive innovation operating under both surface and downhole conditions,producing irreversible and in situ adaptable effects.It has demonstrated transformative capacity across crude oils of various API gravities,with notable impact on extra-heavy crudes and bitumens,through a mechanism based on targeted proton donation that induces selective protonation of polar structures,generating transient carbocations that catalyze molecular fragmentation.This work presents a comprehensive analysis of the effects of RDV-DMG001■treatment(currently named RDV-01L■)on bitumen samples from the Primrose field,Alberta,Canada,using capillary chromatography,SARA analysis,and rheological evaluation,complemented with comparative data on prior applications of RDV-01L■in extra-heavy crudes from Venezuela(Boscán and El Salto).Results for Primrose bitumen show an 85%reduction in viscosity(from 500,000 to 75,000 cP),an increase in API gravity from 8.5 to 15.0(+76.4%),and molecular redistribution toward medium-chain hydrocarbons(C_(13)-C_(16)),with increases in molar and mass fractions up to 39.1%and 62.3%,respectively.SARA analysis confirmed fragmentation of asphaltenes(2.0%mass reduction)and a 5.8%increase in resins,improving colloidal stability and lowering precipitation risk.These changes align with RDV■’s mechanism of action based on carbocation generation.Notably,in field conditions-which are more dynamic and energetically favorable-RDV■treatment efficacy tends to exceed laboratory results,due to synergy among temperature,pressure,and fluid flow gradients which accelerate and enhance protonation and molecular fragmentation.Validated in contexts of advanced chemical transformation(Venezuela,Canada),the technology enables substantial improvements in fluidity,transport,processing,and recovery,with significant potential for annual cost savings in extraction and processing.This study positions RDV■as a disruptive,irreversible,and in situ adaptable chemical solution superior to conventional technologies such as surfactants,nanocatalysts,or aquathermolysis.RDV■is a quantum-impact chemical technology operating via molecular protonation reactions and controlled carbocation formation.The term“quantum”is used here as a conceptual analogy to describe the magnitude and specificity of the molecular reconfiguration induced by RDV■,without asserting direct experimental evidence of quantum reactivity.
文摘To satisfy the increasing global energy demand,while searching for new energy sources,it’s important to take a closer look at the resources already at our disposal and optimize their use.This comprehensive review explores the evolving landscape of unconventional oil resources,focusing on the environmental and economic implica-tions of bitumen partial upgrading technologies,particularly within the Canadian context.With over 55%of the world’s oil reserves comprising of unconventional oil,which includes extra-heavy oil and oil sand bitumen,there is a growing trend to shift from traditional oil sources to these abundant yet under-utilized reserves.This review delves into the challenges and advancements in bitumen partial upgrading,highlighting the latest technologies in thermal cracking,hydrocracking,catalytic cracking,and innovative methods like surfactant integration,cavi-tation,microwave,and plasma-assisted upgrading.It also discusses the environmental implications and eco-nomic feasibility of these technologies,emphasizing the necessity for sustainable and cost-effective solutions at petroleum field sites.Furthermore,the report introduces the transformative concept of Bitumen Beyond Com-bustion(BBC),which explores the non-combustion uses of bitumen and its asphaltene fraction in manufacturing high-value carbon-based products.These novel approaches align with global sustainability goals,offering the potential for significant reductions in greenhouse gas emissions and new routes to diversify the economic ap-plications of bitumen.The review then concludes with an assessment of current challenges and future research directions,advocating for a balanced approach that harmonizes technological innovation,environmental stewardship,and economic viability in the field of bitumen upgrading.
文摘Using a Hamburg wheel-track test device, the resistance to rutting of Gussasphalt is tested and compared. Gussasphalt with hard bitumen has good resistance to rutting. The related resistance abilities to cracking at low temperature of Gussasphalt are tested and compared through flexural experiments and the composite structure fatigue test with temperature dropping. Gussasphalt with high performance polymer modified bitumen has a longer fatigue life and a lower breaking temperature; they can be used in the future surfaces for steel bridge decks in Germany.
文摘In this paper morphology of APP modified bitumen (APP MB) and SBS modified bitumen (SBS MB) was studied by scanning elecron microscopy (SEM) and the morphology property relationship of these two modified bitumen (MB) was discussed. The results indicate that the APP MB systems is in a homogeneous phase structure and the SBS MB system is in a heterogeneous phase structure. Improvement of bituminous physical properties by APP and SBS is closely related with the microstructure of APP and SBS MB.
基金Funded by the Foundation of State Laboratory of Heavy Oil Processing(2002 13)
文摘Bitumen was modified with desulfurized crumb rubber (DCR) in the present of reac tive additives. The effect of the kinds and content of the reactive additive on prop erties of DCR modified bitumen (DCRMB) was investigated. The morphology of DCRMB was characterized by SEM and the changes of the chemical structure of DCRMB wit hout and with the addition of the reactive additive were analyzed by FTIR. The e xperimented results show that the softening point,the elasticity recovery and th e storage stability of DCRMB were improved significantly by the addition of the reactive additive. This is because that a network structure of rubber in DCRMB w as formed and the chemical reaction between C=C double bonds in bitumen and DCR has happened after the reactive additive was added into DCRMB.
基金Funded by the National Natural Science Foundation of China(No.51708121)the National Basic Research Program of China(973 Program)(No.2014CB932104)the Educational Research Projects for Young and Middle-Aged Teachers of Education Department of Fujian Province(No.JAT170067)
文摘Layered double hydroxides(LDHs) with the physical property of high ultraviolet(UV)reflectance were used to enhance the anti-UV aging performance of bitumen. In view of the poor compatibility of LDHs with bitumen, three organic anions, namely, sodium dodecyl benzenesulfonate(SDBS), sodium dodecyl sulfate(SDS) and sodium dodecyl sulfonate(SDSO), were used as modifiers to prepare organic LDHs(OCLDHs) through regeneration process, and the crystal structure, chemical composition, morphological feature and UV shielding capability of synthesized OCLDHs were analyzed. Then the OCLDHs were added into bitumen to evaluate the storage stability and anti-UV aging property of OCLDHs/bitumen composites.The results show that the organic anions are inserted into the interlayers of LDHs, the intercalation expands the interlayer distance of LDHs, makes the particle shapes become more irregular and complicated, and enhances the absorption ability within the range from 200 to 300 nm while has little influence on the UV reflection ability.Result of high temperature storage stability indicates the organic modification ameliorates the compatibility of LDHs with bitumen. Compared with LDHs, OCLDHs decrease the deteriorations of bitumen’s properties during UV exposure test, exhibiting better effect in enhancing anti-UV aging performance of bitumen. Furthermore,among the three OCLDHs, LDHs intercalated by SDBS exhibit the most effective improvement due to the best compatibility with bitumen and comparatively good UV shielding effect.
基金funded by CNSF (No.41173055)and marine department,Sinopec
文摘Natural bitumen is the evolutionary residue of hydrocarbon of sedimentary organic matter. Several kinds of bitumen with different occurrences, including bitumen in source rock, migration bitumen filled in fault, oil-bed bitumen and paleo-reservoir bitumen, are distributed widely in the Dabashan foreland. These kinds of bitumen represent the process of oil/gas formation, migration and accumulation in the region. Bitumen in source rock fiUed in fractures and stylolite and experienced deformation simultaneously together with source rock themselves. It indicated that oil/gas generation and expelling from source rock occurred under normal buried thermal conditions during prototype basin evolution stages prior to orogeny. Occurrences of bitumen in source rock indicated that paleo- reservoir formation conditions existed in the Dabashan foreland. Migration bitumen being widespread in the fault revealed that the fault was the main channel for oil/gas migration, which occurred synchronously with Jurassic foreland deformation. Oil-bed bitumen was the kind of pyrolysis bitumen that distributed in solution pores of reservoir rock in the Dabashan foreland depression, the northeastern Sichuan Basin. Geochemistry of oil-bed bitumen indicated that natural gas that accumulated in the Dabashan foreland depression formed from liquid hydrocarbon by pyrolysis process. However, paleo-reservior bitumen in the Dabashan forleland was the kind of degradation bitumen that formed from liquid hydrocarbon within the paleo-reservior by oxidation, alteration and other secondary changes due to paleo-reservior damage during tectonics in the Dabashan foreland. In combination with the tectonic evolution of the Dabashan foreland, it is proposed that the oil/gas generated, migrated and accumulated to form the paleo-reservoir during the Triassic Indosinian tectonic movement. Jurassic collision orogeny, the Yanshan tectonic movement, led to intracontinental orogeny of the Dabashan area accompanied by geofluid expelling and paleo-reservoir damage in the Dabashan foreland. The present work proposed that there is liquid hydrocarbon exploration potential in the Dabashan foreland, while there are prospects for the existence of natural gas in the Dabashan foreland depression.
