辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(1)：43-51,9.
煅烧纳米凹凸棒土对再生混凝土钢筋锈蚀及黏结特性的影响
Effect of calcined nano-attapulgite on corrosion and bond characteristics of recycled concrete reinforcement
摘要
Abstract
In order to improve the corrosion resistance of steel bars in recycled concrete,calcined nano-attapulgite(CNAT)was used to improve the performance of recycled concrete,The effects of CNAT content and recycled aggregate replacement rate on the corrosion rate,bonding characteristics and chloride ion migration coefficient of steel bars under different corrosion times were investigated through electrochemical accelerated corrosion tests and steel bar drawing tests.The microstructure of recycled concrete was also analyzed by combining the results of pore size measurement and scanning electron microscope characterization tools.The research results show that the corrosion rate of steel reinforcement increases with the rise in the proportion of recycled aggregate substituted,and first decrease and then stabilizes with the increase in CNAT dosage.The bond strength and chloride migration coefficient of reinforcement-concrete demonstrated an initial upward trajectory,followed by a decline with the increase of CNAT dosage.The optimal properties of recycled concrete were achieved at a dosage of 6%CNAT.The addition of an appropriate quantity of CNAT can enhance the internal pore structure,reduce the prevalence of cracks,and improve the bonding and sliding properties between rebar and recycled concrete.The research results provide a theoretical foundation for enhancing the structural performance of recycled concrete.关键词
煅烧纳米凹凸棒土/再生混凝土/钢筋拉拔/钢筋锈蚀/黏结滑移Key words
calcined nano-attapulgite/recycled concrete/steel drawing/corrosion of steel bars/bond-slip分类
土木建筑引用本文复制引用
阎杰,庄永程,杨博,翁维素,谢军,李鸿伟..煅烧纳米凹凸棒土对再生混凝土钢筋锈蚀及黏结特性的影响[J].辽宁工程技术大学学报（自然科学版）,2025,44(1):43-51,9.基金项目
河北省高等学校科学技术研究项目(ZC2024136) （ZC2024136）
张家口市科技发展计划项目(2322145D) （2322145D）
河北省建设科技研究指导性计划项目(2024-2187 （）
2024-2188) （）
