王炳监,胥民尧,沈俊宇,陈登

• 1:盐城工业职业技术学院建筑工程学院
• 2:苏州科技大学土木工程学院

摘要(Abstract)：

【目的】针对再生骨料砂浆粘结界面薄弱/吸水率高等问题，采用有机以及有机与无机复合的内密实外裹浆的方法进行改性。【方法】通过对再生骨料的压碎指标、吸水率、表观密度等性能指标的测试，分析改性前后再生骨料的性能变化，最后探究不同改性方式对再生混凝土力学性能和渗透性能的影响规律及其机理。【结果】结果表明，有机钠盐可以与孔隙中的钙离子反应生成凝胶填充再生骨料的孔隙结构，使得骨料的吸水率降低12.79%,进而提高了混凝土的抗渗透性能，电通量降低37.69%,并且钙离子的加入进一步增强了有机钠盐的改性效果。【结论】浸泡-裹浆复合处理在骨料表面形成核壳层，进一步提高混凝土抗渗透性能，电通量降低至1 283 C,弥补了有机钠盐“单一强化”无法提升力学强度的不足，表现出最高的力学性能。

关键词(KeyWords)： 再生骨料;力学强度;水吸附;渗透性能

Abstract:

Keywords:

基金项目(Foundation): 江苏省高等学校自然科学研究项目(20KJB560007);; 安徽省先进建筑材料工程实验室开放课题(JZCL006KF)

作者(Author): 王炳监,胥民尧,沈俊宇,陈登

DOI: 10.13928/j.cnki.wrahe.2023.01.018

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