复合型掺合料高性能混凝土抗硫酸盐侵蚀性能研究  

Study on Sulfate Corrosion Resistance of High Performance Concrete with Compound Admixtures

作　　者：曹浩鹏 袁芬 王涛 曹鹤磊 赵鹏 刘隽江 

机构地区：[1]新疆研科节能科技有限公司,新疆维吾尔自治区乌鲁木齐830001 [2]新疆蓝源科创工程检测有限公司,新疆维吾尔自治区乌鲁木齐830001 [3]新疆高性能混凝土辅助性胶凝材料工程技术研究中心,新疆维吾尔自治区乌鲁木齐830001

出　　处：《混凝土世界》2024年第3期30-37,共8页China Concrete

基　　金：新疆维吾尔自治区科技支疆项目(2022E02022);新疆维吾尔自治区“两区”科技发展计划项目(2022LQ03008);新疆维吾尔自治区“揭榜挂帅”项目(新疆装配式桥梁设计与施工关键技术研究)

摘　　要：本文选用乌鲁木齐地区水泥、掺合料、外加剂等原材料,制备不同的高性能混凝土试件,从硫酸盐侵蚀的机理入手,研究掺加复合型掺合料高性能混凝土的抗硫酸盐侵蚀性能。结果表明:当水胶比为0.40或0.35,掺加30%复合型掺合料时,高性能混凝土可以抵抗SO_(2)^(2-)浓度10000mg/L及以下硫酸盐环境水的侵蚀;水胶比≤0.30、掺30%复合型掺合料的高性能混凝土,与水胶比≤0.40、掺50%复合型掺合料的高性能混凝土均能抵抗SO_(4)^(2-)浓度20250mg/L及以下硫酸盐环境水的侵蚀;水胶比和复合型掺合料的掺量均是影响高性能混凝土抗硫酸盐侵蚀性能的重要因素,随着水胶比的降低,高性能混凝土的抗硫酸盐侵蚀能力逐渐增强,而在相同水胶比条件下,随着复合型掺合料掺量的降低,与之相对应的高性能混凝土的抗侵蚀能力随之下降。This paper selects raw materials such as cement,admixtures,and additives from the Urumqi region to prepare different high performance concrete specimens,and studies the anti-sulfate attack performance of high performance concrete with composite admixtures,starting from the mechanism of sulfate attack.The results show that when the water-cement ratio is 0.40 or 0.35 and adds 30%composite admixture,high performance concrete can resist water erosion in sulfate environmental with SO42~concentration of 10000 mg/L and below;high performance concrete with a water-cement ratio≤0.30,adds 30%composite admixture,and a water-cement ratio≤0.40,adds 50%composite admixture can both resist water erosion in sulfate environmental with a SO_(2 )^(2-)concentration of 20250 mg/L and below.The water-cement ratio and the dosage of composite admixtures are important factors affecting the sulfate resistance of high performance concrete.As the water-cement ratio decreases,the sulfate resistance of high performance concrete specimens gradually increases.However,under the same water-cement ratio conditions,as the dosage of composite admixtures decreases,the corresponding sulfate resistance of high performance concrete decreases.

关 键 词：水胶比 复合型掺合料 高性能混凝土 抗蚀系数 钙钒石 

分 类 号：TU528[建筑科学—建筑技术科学]