秸秆/聚丙烯纤维-玻化微珠保温混凝土基本性能正交试验  

Orthogonal Experiment on Basic Properties of Thermal Insulation Concrete Mixed with Straw,Polypropylene Fiber and Glazed Hollow Beads

作　　者：姚韦靖 韩金秀 方冉 庞建勇[1,2] YAO Wei-jing;HAN Jin-xiu;FANG Ran;PANG Jian-yong(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Anhui Key Laboratory of Mining Construction Engineering,Anhui University of Science and Technology,Huainan 232001,China;Postdoctoral Scientific Research Workstation,Wuhu Surveying and Mapping DesignInstitute Co.,Ltd.,Wuhu 241000,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]安徽理工大学矿山建设工程安徽省高校重点实验室,安徽淮南232001 [3]芜湖市勘察测绘设计研究院有限责任公司博士后科研工作站,安徽芜湖241000

出　　处：《长江科学院院报》2024年第6期156-163,共8页Journal of Changjiang River Scientific Research Institute

基　　金：矿山建设工程安徽省高校重点实验室开放基金项目(GXZDSYS2022106);淮南市指导性科技计划项目(2021022);安徽省高等学校自然科学研究重点项目(KJ2020A0297)。

摘　　要：应用正交试验法开展了16组秸秆/聚丙烯纤维-玻化微珠保温混凝土和3组玻化微珠保温混凝土基本性能试验。完成了秸秆粉末体积率VS、玻化微珠代砂率VG和聚丙烯纤维体积率VP这3种因素对秸秆/聚丙烯纤维-玻化微珠保温混凝土立方体抗压、劈裂抗拉强度极差和方差分析。结果表明:玻化微珠掺入可有效提高混凝土隔热保温性、工作性,但会造成强度损失。玻化微珠对混凝土抗压强度减小最为显著,最大损失幅度为24.64%,秸秆粉末和聚丙烯纤维对抗压强度影响可忽略;聚丙烯纤维对混凝土抗拉强度提高极为显著,最大提升幅度为16.72%,同时显著提高拉压比。基于试验数据建立了秸秆/聚丙烯纤维-玻化微珠保温混凝土抗压和抗拉强度预测模型,预测效果较好。Utilizing an orthogonal experimental design,we evaluated the primary properties of 16 groups of thermal insulation concrete mixed with straw,polypropylene fiber and glazed hollow beads as well as three groups of concrete mixed with merely glazed hollow beads.Further variance and range analysis examined the impact of three significant factors on the compressive and splitting tensile strengths of cubic specimens.The three factors include:volume fraction of straw powder(VS),sand-replacing glazed hollow bead ratio(VG),and volume fraction of polypropylene fiber(VP).Our findings reveal that incorporation of glazed hollow beads enhances the concrete's thermal insulation properties and workability yet results in diminished strength.Notably,glazed hollow beads significantly reduce the compressive strength of concrete,with observed maximum losses reaching 24.64%.Meanwhile,the impacts of straw powder and polypropylene fiber on compressive strength proved to be minimal and can be neglected.In contrast,polypropylene fiber markedly reinforces the tensile strength,inducing a maximal increase of 16.72%and a substantial improvement in the tension-to-compression ratio.Regression analysis of the experimental outcomes facilitates the development of predictive models for both compressive and tensile strength of the concrete mixed with straw,polypropylene fiber and glazed hollow beads,yielding promising predictions.

关 键 词：保温混凝土 秸秆 聚丙烯纤维 玻化微珠 力学性能 正交试验 强度预测模型 

分 类 号：TU528[建筑科学—建筑技术科学]