This paper presents a new method of modifying sodium silicate binder with ultra-fine powders. The sodium silicate binder modified by ultra-fine powder A and the organic B can reduce the addition amount of the binder. ...This paper presents a new method of modifying sodium silicate binder with ultra-fine powders. The sodium silicate binder modified by ultra-fine powder A and the organic B can reduce the addition amount of the binder. The results indicate that the 24 h strength has increased by 39.9% at room temperature and the residual strength has decreased by 30.7% at 800℃, compared to the conventional sodium silicate. An available material to improve the moisture resistance was also found by adding about 2% more inorganic C, and it can increase the moist strength by 20%. In the end, the microanalyses are given to explain the modifying machanism, i. e., the ultra-fine powder A can refine the sodium silicate binder to avoid holes in the binder bond, which can increase the 24 h strength at room temperture, and can lead to more cracks in the bond after the molding sand is heated to 800℃. This is because of the stress caused by the new eutectic complex of modified sodium silicate binder.展开更多
Bituminous materials play a crucial role in the construction industry,serving as essential binders in asphalt mixtures.Understanding their bonding behavior,mechanism,and characterization is imperative for enhancing pa...Bituminous materials play a crucial role in the construction industry,serving as essential binders in asphalt mixtures.Understanding their bonding behavior,mechanism,and characterization is imperative for enhancing pavement performance,durability,and sustainability.Despite the widespread use of bituminous materials,challenges persist in optimizing their physical,rheological,and mechanical properties,addressing aging effects,and developing eco-friendly alternatives.The modification can be made by incorporating modifiers or additives,such as anti-stripping agents,surfactants,and bonding promoters,at their optimal dosages.Technically,the cohesion and adhesion bonds could be reinforced by adding a designated percentage of additives to the asphalt binder and within the asphalt-aggregate interfaces in asphalt mixtures.Prior to improving the pavement materials for road construction,adhesion and wetting properties also need to be given crucial attention.The inter-surface characteristics and their morphological behavior significantly influence the adhesion and cohesion bonding within binder-aggregate matrices,as indicated by the good correlations in both dry and wet conditions between failure pattern and bond strength.This review highlights recent breakthroughs in bituminous material research,emphasizing innovative approaches to enhance performance,durability,and environmental compatibility,providing insights for future advancements in asphalt pavement engineering.To advance the development of robust,environmentally sensitive asphalt pavements and guarantee a sustainable and effective transportation infrastructure for years to come,cooperation between researchers,engineers,and industry stakeholders is important.展开更多
基金The subject is supported by National Natural Science Fundof China: 50575085.
文摘This paper presents a new method of modifying sodium silicate binder with ultra-fine powders. The sodium silicate binder modified by ultra-fine powder A and the organic B can reduce the addition amount of the binder. The results indicate that the 24 h strength has increased by 39.9% at room temperature and the residual strength has decreased by 30.7% at 800℃, compared to the conventional sodium silicate. An available material to improve the moisture resistance was also found by adding about 2% more inorganic C, and it can increase the moist strength by 20%. In the end, the microanalyses are given to explain the modifying machanism, i. e., the ultra-fine powder A can refine the sodium silicate binder to avoid holes in the binder bond, which can increase the 24 h strength at room temperture, and can lead to more cracks in the bond after the molding sand is heated to 800℃. This is because of the stress caused by the new eutectic complex of modified sodium silicate binder.
基金Ministry of Higher Education Malaysia for the Fundamental Research Grant Scheme with project code FRGS/1/2021/TK01/USM/02/1 that enabled us to conduct this research workAppreciation also goes to the deanship of scientific research at King Khalid University for funding this work through large group research project under grant number(RGP2/418/45).
文摘Bituminous materials play a crucial role in the construction industry,serving as essential binders in asphalt mixtures.Understanding their bonding behavior,mechanism,and characterization is imperative for enhancing pavement performance,durability,and sustainability.Despite the widespread use of bituminous materials,challenges persist in optimizing their physical,rheological,and mechanical properties,addressing aging effects,and developing eco-friendly alternatives.The modification can be made by incorporating modifiers or additives,such as anti-stripping agents,surfactants,and bonding promoters,at their optimal dosages.Technically,the cohesion and adhesion bonds could be reinforced by adding a designated percentage of additives to the asphalt binder and within the asphalt-aggregate interfaces in asphalt mixtures.Prior to improving the pavement materials for road construction,adhesion and wetting properties also need to be given crucial attention.The inter-surface characteristics and their morphological behavior significantly influence the adhesion and cohesion bonding within binder-aggregate matrices,as indicated by the good correlations in both dry and wet conditions between failure pattern and bond strength.This review highlights recent breakthroughs in bituminous material research,emphasizing innovative approaches to enhance performance,durability,and environmental compatibility,providing insights for future advancements in asphalt pavement engineering.To advance the development of robust,environmentally sensitive asphalt pavements and guarantee a sustainable and effective transportation infrastructure for years to come,cooperation between researchers,engineers,and industry stakeholders is important.
