秸秆/聚丙烯纤维-玻化微珠保温混凝土基本性能正交试验

姚韦靖; 韩金秀; 方冉; 庞建勇

doi:10.11988/ckyyb.20230006

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长江科学院院报 ›› 2024, Vol. 41 ›› Issue (6) : 156-163. DOI: 10.11988/ckyyb.20230006

水工结构与材料

秸秆/聚丙烯纤维-玻化微珠保温混凝土基本性能正交试验

姚韦靖^1,2,3, 韩金秀¹, 方冉¹, 庞建勇^1,2

作者信息 +

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

YAO Wei-jing^1,2,3, HAN Jin-xiu¹, FANG Ran¹, PANG Jian-yong^1,2

Author information +

文章历史 +

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V_S、玻化微珠代砂率V_G和聚丙烯纤维体积率V_P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。

Abstract

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 (V_S), sand-replacing glazed hollow bead ratio (V_G), and volume fraction of polypropylene fiber (V_P). 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.

导出引用

姚韦靖, 韩金秀, 方冉, 庞建勇. 秸秆/聚丙烯纤维-玻化微珠保温混凝土基本性能正交试验[J]. 长江科学院院报. 2024, 41(6): 156-163 https://doi.org/10.11988/ckyyb.20230006

YAO Wei-jing, HAN Jin-xiu, FANG Ran, PANG Jian-yong. Experiment on Basic Properties of Thermal Insulation
Concrete Mixed with Straw, Polypropylene Fiber and Glazed Hollow Beads[J]. Journal of Changjiang River Scientific Research Institute. 2024, 41(6): 156-163 https://doi.org/10.11988/ckyyb.20230006

中图分类号： TU528

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