硅酸盐通报2024，Vol.43Issue(11)：4019-4026,8.
养护工艺对无砂大孔再生混凝土性能影响研究
Effect of Curing Process on Properties of Sand-Free Macroporous Recycled Concrete
摘要
Abstract
To address the waste of natural aggregates and limited application of recycled aggregates,this study prepared sand-free macroporous recycled concrete using natural and recycled aggregates.Macro and micro properties of dry,water spraying,and coating sand-free macroporous recycled concrete were investigated via mechanical properties,microhardness,scanning electron microscopy,and X-ray diffraction analysis.The results show that different curing processes affect the hydration reaction of ordinary Portland cement,and sand-free macroporous recycled concrete"honeycomb"structure and recycled aggregate characteristics complicate the hydration process.The best curing method is coating,followed by dry,while water spraying is least effective.Microhardness and scanning electron microscopy tests reveal that the free water absorption in matrix increases during water spraying,resulting in concrete expansion,deteriorating adhesion of aggregate-cement interface and decreasing hardness.X-ray diffraction analysis results confirm the effects of curing methods on sand-free macroporous recycled concrete via composition of hydration products like portlandite.关键词
大孔再生混凝土/养护工艺/抗压强度/线性拟合/显微硬度/微观结构Key words
macroporous recycled concrete/curing process/compressive strength/linear fitting/microhardness/microstructure分类
建筑与水利引用本文复制引用
徐晨洋,张志柱,张鹏飞,李秋义,孔哲,郭远新,陈明旭..养护工艺对无砂大孔再生混凝土性能影响研究[J].硅酸盐通报,2024,43(11):4019-4026,8.基金项目
国家自然科学基金项目(52078261) （52078261）
山东省重点研发计划课题(2021SFGC0201-04) （2021SFGC0201-04）
山东省自然科学基金面上项目(ZR2021ME110,ZR2022QE094) （ZR2021ME110,ZR2022QE094）
青岛市自然科学基金青年项目(23-2-1-105-zyyd-jch) （23-2-1-105-zyyd-jch）
青岛市标准化资助奖励项目(2422243) （2422243）
山东省地市级校企合作项目(2423272,2421073) （2423272,2421073）
