重庆大学学报2024，Vol.47Issue(2)：14-21,8.DOI:10.11835/j.issn.1000-582X.2021.055
海砂超高性能混凝土试验
Experimental study on sea-sand ultra-high performance concrete
摘要
Abstract
In this paper,ultra-high performance concrete(UHPC)and ordinary concrete are prepared using undesalted sea-sand.The impact of sea-sand with varying chloride ion levels on the compressive strength,pore structure and durability of steel embedded in UHPC is investigated and compared with that of conventional concrete.The results show that the chloride ion content in sea-sand does not significantly negatively affect the compressive strength of UHPC.The critical pore radius of UHPC made with sea-sand is approximately 2 nm.Different from sea sand concrete,the porosity of sea-sand UHPC increases with the increase of chlorine content in sea-sand.Even when the chloride ion content in the sea sand is as high as 0.636%,the chloride ion permeability of the sea-sand UHPC remains negligible.The reinforcement in sea-sand UHPC is in a passive state and tends to stabilize after 28 days.关键词
海砂/超高性能混凝土/抗压强度/孔结构/耐久性Key words
sea-sand/ultra-high performance concrete/compressive strength/pore structure/durability分类
建筑与水利引用本文复制引用
韦建刚,陈荣,黄伟,卞学海,麻秀星..海砂超高性能混凝土试验[J].重庆大学学报,2024,47(2):14-21,8.基金项目
国家重点研发计划资助项目(2018YFC0705400) （2018YFC0705400）
国家自然科学基金资助项目(51878172) （51878172）
中国博士后科学基金资助项目(2020M671951) （2020M671951）
绿色建筑材料国家重点实验室开放基金资助项目(YA-612).Supported by the National Key Research and Development Program of China(2018YFC0705400),National Natural Science Foundation of China(51878172),China Postdoctoral Science Foundation(2020M671951),and Open Fund of National Key Laboratory of Green Building Materials(YA-612). （YA-612）
