摘要
Abstract
To study the mechanical and durability properties of marls-based mineral polymer concrete,concrete specimens were designed and fabricated using marl,slag powder and fly ash as the main raw materials in this paper.Through single-factor experiments,the effects of marl fineness and Na2O content in the alkali activator on the performance of concrete were investigated.The results show that increasing the fineness of marl can significantly enhance the mechanical and durability properties of concrete.When the fineness is 800 mesh,the compressive strength at 56 days is 60.5 MPa,which is 32.1％higher than that at 400 mesh.In addition,when the Na2O content is 7％,the comprehensive performance of the concrete is the best.Its 56-day compressive strength is 68.8 MPa and the chloride ion diffusion coefficient is 2.1×10-12m2/s.The research can provide data support for the engineering application of marl-based mineral polymer concrete.关键词
泥灰岩/矿物聚合物混凝土/抗压强度/抗折强度/氯离子扩散系数Key words
Marl/Mineral polymer concrete/Compressive strength/Flexural strength/Chloride ion diffusion coefficient分类
建筑与水利
