钢渣和风积沙对混凝土抗压强度的影响及机理研究  

Effects and mechanisms of steel slag and aeolian sand on the compressive strength of concrete

作　　者：史阳光 高峰 刘磊 阎奇武[3] 毛世杰 SHI Yangguang;GAO Feng;LIU Lei;YAN Qiwu;MAO Shijie(College of Physical Science and Technology,Yili Normal University,Yi'ning 835000,China;Xinjiang Laboratory of Phase Transitions and Microstructures in Condensed Matters,Yi'ning 835000,China;College of Civil Engineering,Central South University,Changsha 410083,china)

机构地区：[1]伊犁师范大学物理科学与技术学院,新疆伊宁835000 [2]新疆凝聚态相变与微结构实验室,新疆伊宁835000 [3]中南大学土木工程学院,湖南长沙410083

出　　处：《新型建筑材料》2025年第4期29-33,共5页New Building Materials

基　　金：新疆维吾尔自治区重点研发项目(2023B01014);伊犁师范大学校级科研项目(2021YSYB105);新疆维吾尔自治区高校科研计划项目(XJEDU2022P095)。

摘　　要：以风积沙替代部分河砂,钢渣替代部分碎石制备钢渣风积沙混凝土,研究风积沙和钢渣的替代率对混凝土7、28 d抗压强度及微观形貌的影响,并建立了抗压强度预测模型。结果表明:掺入适量风积沙和钢渣可提高混凝土的抗压强度,当风积沙替代率为30%,钢渣替代率为30%时,钢渣风积沙混凝土的抗压强度最高,7、28 d抗压强度分别为26.5、42.5 MPa。SEM分析表明,掺入适量风积沙和钢渣可改善混凝土的水化产物及界面过渡区;建立的抗压强度预测模型精度较高。Steel slag and aeolian sand were used as substitutes for crushed stone and river sand,respectively,to prepare steel slag aeolian sand concrete.The study investigated the effects of different replacement rates of aeolian sand and steel slag on the 7 d and 28 d compressive strength and microstructure of concrete,and a prediction model for compressive strength was established.The results show that the appropriate addition of aeolian sand and steel slag can improve the compressive strength of concrete.When the replacement rate of aeolian sand is 30%and that of steel slag is 30%,the highest compressive strength of steel slag aeolian sand concrete is achieved,with 7 d and 28 d compressive strength of 26.5 MPa and 42.5 MPa,respectively.SEM analysis indicates that the appropriate addition of aeolian sand and steel slag can improve the hydration products and interfacial transition zone of concrete.The established compressive strength prediction model has a high degree of accuracy.

关 键 词：风积沙 钢渣 抗压强度 强度预测模型 影响机理 

分 类 号：TU528.041[建筑科学—建筑技术科学]