This research explores the utilization of wheat straw ash(WSA),an agricultural by-product enriched with amorphous silica,as a partial cement replacement in concrete production.The WSA content ranged from 4%to 16%by ma...This research explores the utilization of wheat straw ash(WSA),an agricultural by-product enriched with amorphous silica,as a partial cement replacement in concrete production.The WSA content ranged from 4%to 16%by mass,with water-to-cement(w/c)ratios varying between 0.4 and 0.6.Using response surface methodology(RSM)combined with central composite design,this study optimized mix designs and developed predictive models for key performance indicators,including workability and mechanical properties of concrete.The results demonstrate that an optimal balance of the WSA and a reduced w/c ratio significantly enhance both the workability and mechanical performance of concrete.The pozzolanic reaction between WSA and calcium hydroxide promotes the formation of calcium silicate hydrate(C-S-H)gel.The optimal mix composition,comprising 10.12%w(WSA)with a w/c ratio of 0.45,achieved a desirability score of 71.83%.This ground-breaking research underscores the viability of WSA as a supplementary cementitious material,offering a sustainable solution for concrete production while simultaneously enhancing its workability and mechanical properties.展开更多
The treatment of wheat straw is very difficult,and its utilization rate is very low;accumulation causes air pollution and even fire.To make full use of wheat straw resources,we examined how using different physical an...The treatment of wheat straw is very difficult,and its utilization rate is very low;accumulation causes air pollution and even fire.To make full use of wheat straw resources,we examined how using different physical and chemical methods to treat the wheat straw which can improve its strength abilities,or enhance the activity of wheat straw ash.In terms of concrete additives,it can reduce the amount of cement used.In this paper,we found that alkali treatment can significantly improve the tensile strength of wheat straw fiber,but polyvinyl alcohol treatment has no obvious effect on the strength of wheat straw fiber after alkali treatment.At the same time,we analyzed the wheat straw fiber microstructure through scanning electron microscopy,and we also studied the wheat straw ash chemical composition after 600℃ high-temperature treatment.Through the compressive strength test,we found that the strength of concrete decreases with increasing of wheat straw fiber and wheat straw powder content,and the compressive strength of concrete with wheat straw ash instead of 5%cement decreases little,and the strength of the concrete also decreases with the increasing of wheat straw ash.Through the macroscopic observation of the failure form of concrete,we found that the failure form of concrete with wheat straw ash is similar to that of common concrete,while the failure degree of concrete with wheat straw fiber and wheat straw powder is weakened.Through the scanning electron microscope test of the concrete,it was found that wheat straw fiber has an effect on the cracking of concrete and the inner compactness of concrete can also be affected by adding wheat straw ash and wheat straw powder.展开更多
Correction:Low-carbon Mater Green Constr 2,29(2024)https://doi.org/10.1007/s44242-024-00054-6 Following publication of the original article[1],it is noticed that the Ethics declarations were incorrect,as‘Ethics appro...Correction:Low-carbon Mater Green Constr 2,29(2024)https://doi.org/10.1007/s44242-024-00054-6 Following publication of the original article[1],it is noticed that the Ethics declarations were incorrect,as‘Ethics approval and consent to participate’and‘Consent for publication’are not required for the article and should be removed.The original article[1]has been updated.展开更多
文摘This research explores the utilization of wheat straw ash(WSA),an agricultural by-product enriched with amorphous silica,as a partial cement replacement in concrete production.The WSA content ranged from 4%to 16%by mass,with water-to-cement(w/c)ratios varying between 0.4 and 0.6.Using response surface methodology(RSM)combined with central composite design,this study optimized mix designs and developed predictive models for key performance indicators,including workability and mechanical properties of concrete.The results demonstrate that an optimal balance of the WSA and a reduced w/c ratio significantly enhance both the workability and mechanical performance of concrete.The pozzolanic reaction between WSA and calcium hydroxide promotes the formation of calcium silicate hydrate(C-S-H)gel.The optimal mix composition,comprising 10.12%w(WSA)with a w/c ratio of 0.45,achieved a desirability score of 71.83%.This ground-breaking research underscores the viability of WSA as a supplementary cementitious material,offering a sustainable solution for concrete production while simultaneously enhancing its workability and mechanical properties.
基金Supported by the Opening Project of Tunnel and Underground Engineering Research Center of Jiangsu Province (TERC) (2021-SDJJ-08).
文摘The treatment of wheat straw is very difficult,and its utilization rate is very low;accumulation causes air pollution and even fire.To make full use of wheat straw resources,we examined how using different physical and chemical methods to treat the wheat straw which can improve its strength abilities,or enhance the activity of wheat straw ash.In terms of concrete additives,it can reduce the amount of cement used.In this paper,we found that alkali treatment can significantly improve the tensile strength of wheat straw fiber,but polyvinyl alcohol treatment has no obvious effect on the strength of wheat straw fiber after alkali treatment.At the same time,we analyzed the wheat straw fiber microstructure through scanning electron microscopy,and we also studied the wheat straw ash chemical composition after 600℃ high-temperature treatment.Through the compressive strength test,we found that the strength of concrete decreases with increasing of wheat straw fiber and wheat straw powder content,and the compressive strength of concrete with wheat straw ash instead of 5%cement decreases little,and the strength of the concrete also decreases with the increasing of wheat straw ash.Through the macroscopic observation of the failure form of concrete,we found that the failure form of concrete with wheat straw ash is similar to that of common concrete,while the failure degree of concrete with wheat straw fiber and wheat straw powder is weakened.Through the scanning electron microscope test of the concrete,it was found that wheat straw fiber has an effect on the cracking of concrete and the inner compactness of concrete can also be affected by adding wheat straw ash and wheat straw powder.
文摘Correction:Low-carbon Mater Green Constr 2,29(2024)https://doi.org/10.1007/s44242-024-00054-6 Following publication of the original article[1],it is noticed that the Ethics declarations were incorrect,as‘Ethics approval and consent to participate’and‘Consent for publication’are not required for the article and should be removed.The original article[1]has been updated.
