摘要
为了探索聚丙烯纤维对抗硫水泥配置的混凝土力学性能及体积稳定性的影响,采用聚丙烯纤维和混掺纤维对前期试验中的玄武岩纤维进行取代,测试了不同纤维掺量的8组试样的抗压强度、劈裂抗拉强度和长度变化率。研究结果表明,所有掺加纤维试样的抗压强度均低于控制样;在所有掺加纤维试样中,0.3%单掺聚丙烯纤维试样有最高的抗压强度。所有掺加纤维试样的劈裂抗拉强度均高于控制样;0.2%玄武岩纤维+0.3%聚丙烯纤维的混掺试样在所有试样中劈裂抗拉强度最高。0.2%玄武岩纤维+0.3%聚丙烯纤维的混掺试样平均膨胀率最小,其膨胀幅度也最小,体积稳定性最好。利用功效系数法筛选出综合性能最优的一组配比,研究可为纤维抗硫水泥混凝土的研究和应用提供基础.
The polypropylene fiber and mixed fiber are used to replace the basalt fiber to study the influence poly-propylene fiber on the mechanical properties and volumetric stability of the concrete made of sulfate-resistant ce-ment.The compressive strength,splitting tensile strength,and length change rate of eight groups of samples with dif-ferent fiber content are tested.The results show that the compressive strengths of all samples mixed with polypropyl-ene fiber are lower than that of the control samples.Among the samples mixed with fibers,the 0.3%polypropylene fi-ber samples have the highest compressive strength.The splitting tensile strengths of all samples mixed with fiber are higher than that of the control samples,and the blended samples with 0.2%basalt fiber and 0.3%polypropylene fi-ber has the highest spliting tensile strength.The average expansion rate of the blended samples with 0.2%basalt fi-ber and 0.3%polypropylene fiber is the smallest;the expansion amplitude is also the smallest,and the volume stabil-ity is the best.The group with best comprehensive performances is filtrated by the efficacy coefficient method.It may provide a basis for the research and the application of fiber-modified sulfur-resistant cement composite concrete.
作者
高翔
杨淑雁
GAO Xiang;YANG Shuyan(School of Civil and Hydraulic Engineering,Ningxia University,Yinchuan 750021,China)
出处
《低温建筑技术》
2023年第5期21-25,共5页
Low Temperature Architecture Technology
基金
国家自然科学地区基金项目(51868065)。
关键词
抗硫水泥
玄武岩纤维
聚丙烯纤维
混掺纤维
sulfate-resistant cement
basalt fiber
polypropylene fiber
mixed fiber
