碳-玻璃混杂纤维改性橡胶混凝土抗冻性研究  

Frost Damage Resistance and Durability of Carbon-Glass Hybrid Fiber Modified Rubber Concrete

作　　者：孙杰[1] 孙明星 冯川 吴爽 马稳 SUN Jie;SUN Mingxing;FENG Chuan;WU Shuang;MA Wen(School of Urban Construction,Wzhan University of Science and Technology,Wuhan,Hubei 430065,China)

机构地区：[1]武汉科技大学城市建设学院,湖北武汉430065

出　　处：《水利与建筑工程学报》2022年第2期101-107,117,共8页Journal of Water Resources and Architectural Engineering

基　　金：武汉科技大学研究生创新创业基金资助。

摘　　要：为研究碳-玻璃混杂纤维改性橡胶混凝土抗冻性,采用不同体积分数的碳纤维(CF)和玻璃纤维(GF)混杂纤维,通过力学性能试验和快速冻融试验,对其力学性能、相对动弹性模量、质量损失率进行了测定。研究表明:单掺碳纤维较单掺玻璃纤维更能减缓改性橡胶混凝土在冻融循环后的质量损失和相对动弹性模量的下降,且碳纤维和玻璃纤维两种纤维混杂后对改性橡胶混凝土的抗冻性能提升效果较单掺碳(玻璃)纤维和未掺纤维的普通改性橡胶混凝土更为明显;通过对碳-玻璃混杂纤维掺入提高改性橡胶混凝土的抗冻性能的机理进行分析,建立了抗冻耐久性评价参数和冻融损伤寿命预测模型,并对筛选出的六组配比进行相应力学性能测试,得出力学性能随所用纤维掺量的变化规律与最佳纤维配比,其规律与冻融试验结论相契合,可为寒冷地区混凝土建筑抗冻提供技术参考。In order to analyze the frost resistance of carbon-glass hybrid fiber modified rubber concrete,we use differ-ent volume fractions CF and GF hybrid fibers to measure the mechanical properties,relative dynamic elastic modulus and mass loss rate through mechanical properties test and rapid freeze-thaw test.Research results are as follows.The single doped carbon fiber is the glass fiber can slow down the quality of the modified rubber concrete after freeze-thaw cycle reduced loss and relative dynamic elastic modulus,two fibers and carbon fiber and glass fiber hybrid of rubber modified concrete antifreeze performance improvement effect after a single(glass)of carbon fiber and not ordinary rub-ber modified doped fiber concrete is more obvious.Through the carbon mixed-glass fiber added to improve the perform-ance of modified rubber concrete antifreeze mechanism is analyzed,established ev aluation parameters of freeze-thaw durability and prediction model of freeze-thaw damage life,and the mechanical properties of the selected six groups were tested,the variation rule of mechanical properties with the fiber dosage and the optimal fiber ratio were obtained.Its rule agrees with the conclusion of freeze-thaw test.This paper can provide technical reference for concrete building frost resistance in cold area.

关 键 词：改性橡胶混凝土 碳-玻璃混杂纤维 最佳掺和比例 抗冻耐久性评价参数 力学性能 

分 类 号：TU582[建筑科学—建筑技术科学]