多尺度玄武岩纤维改性橡胶混凝土力学性能评价  

Mechanical Performance Evaluation of Multi-Scale Basalt Fiber Modified Rubber Concrete

作　　者：宗亮 沈宁 马超 张佳 郑华 ZONG Liang;SHEN Ning;MA Chao;ZHANG Jia;ZHENG Hua(Shuifa Planning&Design Co.,Ltd.,Jinan Shandong 250100,China;Eastern China Water Conservancy Design Co.,Ltd.,Jinan Shandong 250100,China;China Construction Civil Engineering Co.,Ltd.,Beijing 100071,China)

机构地区：[1]水发规划设计有限公司,山东济南250100 [2]中水华东规划设计有限公司,山东济南250100 [3]中国建筑土木建设有限公司,北京100071

出　　处：《当代化工》2025年第1期21-26,共6页Contemporary Chemical Industry

基　　金：国家自然科学基金项目(项目编号:51908308)。

摘　　要：将废弃轮胎加工为橡胶颗粒掺入混凝土中,可提高废旧资源重复利用率,但降低了混凝土的力学性能;为获得不同尺度玄武岩纤维组合对橡胶混凝土力学性能的影响规律,采用20目(0.85 mm)橡胶颗粒制备橡胶混凝土,进行3种尺度(6、12、18 mm)玄武岩纤维不同组合的橡胶混凝土力学性能实验。结果表明:采用橡胶颗粒等体积替换10%中砂后混凝土抗压强度、劈裂抗拉强度明显降低,20%替换率时强度降幅显著小于10%替换率;掺0.1%玄武岩纤维时抗压强度最大,劈裂抗拉强度随玄武岩纤维掺量增加而增大;掺12 mm尺度纤维时橡胶混凝土抗压强度、劈裂抗拉强度、抗折强度最大,掺18 mm尺度纤维优于6 mm尺度纤维;掺2种尺度纤维时抗压强度小于掺单一尺度,掺中、长尺度纤维组合优于掺其他尺度纤维组合,掺短纤维组合时,短纤维优化空间分布形态提高混凝土的抗压强度大于纤维长度因素;短纤维与中、长尺度纤维组合均可提高其劈裂抗拉强度、抗折强度,尺度越大强度越高;中、长尺度纤维组合劈裂抗拉、抗折性能最佳,短、中、长3种尺度纤维组合次之。Processing waste tires into rubber particles and adding them to concrete can improve the reuse rate of waste resources,but it reduces the mechanical properties of concrete.To obtain the influence of different scales of basalt fiber combinations on the mechanical properties of rubber concrete,rubber concrete was prepared using 20 mesh rubber particles,and mechanical performance tests were conducted on rubber concrete with different combinations of basalt fibers at three scales(6 mm,12 mm,18 mm).The results showed that the compressive and splitting tensile strength of concrete significantly decreased after replacing 10% of medium sand with rubber particles of equal volume,and the strength reduction was significantly smaller at a 20% replacement rate than at a 10% replacement rate;when 0.1%basalt fiber was added,the compressive strength was the highest,and the splitting tensile strength increased with the increase of basalt fiber content;when 12 mm scale fibers were added,the compressive strength,splitting tensile strength,and flexural strength of rubber concrete were the highest,and the addition of 18 mm scale fibers was superior to 6 mm scale fibers;when two different scales of fibers were added,the compressive strength was lower than when a single scale was added.The combination of medium and long scale fibers was superior to the combination of other scale fibers.When a short fiber combination was added,the optimized spatial distribution of short fibers improved the compressive strength of concrete more than the fiber length factor;the combination of short fibers and medium to long scale fibers could improve their splitting tensile and flexural strength,with higher strength at larger scales;the combination of medium and long scale fibers had the best splitting tensile and bending properties,followed by the combination of short,medium,and long scale fibers.

关 键 词：玄武岩纤维 橡胶混凝土 制备 多尺度 分布 力学评价 

分 类 号：TU528.58[建筑科学—建筑技术科学] TQ178[化学工程—硅酸盐工业]