摘要
研究了水稻秸秆纤维的长度(10~30 mm、40~60 mm)和掺量(0、2、4、8 kg/m3)对混凝土抗压强度的影响,分析了试件表面的裂缝情况,并进行了析因分析。结果表明:掺入适量水稻秸秆纤维能有效提高混凝土的1、14、28 d抗压强度,改善单轴压缩作用下混凝土表面裂缝的形态及分布情况,且较长水稻秸秆纤维的提高作用相对更好;水稻秸秆纤维对混凝土1、14、28 d抗压强度的影响程度大小均为:掺量>长度与掺量共同作用>长度;考虑28 d抗压强度时,建议水稻秸秆纤维的长度为40~60 mm、掺量为2 kg/m3。
The effects of the length(10~30 mm、40~60 mm)and content(0,2,4,8 kg/m3)of rice straw fiber on the compressive strength of concrete were studied,the surface cracks of the specimens were analyzed,and the factorial analysis was conducted.The results show that adding an appropriate content of rice straw fiber can effectively improve the 1 d,14 d,and 28 d compressive strength of concrete,improve the morphology and distribution of surface cracks under uniaxial compression,and the improvement effect of longer rice straw fiber is relatively better.The influence degree of rice straw fiber on the 1 d,14 d,and 28 d compressive strength of concrete is as follows:content>combined effect of length and content>length.When considering the 28 d compressive strength,it is recommended that the length of rice straw fiber be 40~60 mm and the content be 2 kg/m3.
作者
张烜
赵瑜
黄真江
张坤
陆智杰
ZHANG Xuan;ZHAO Yu;HUANG Zhenjiang;ZHANG Kun;LU Zhijie(College of Civil Engineering,Guizhou University,Guiyang 550000,China)
出处
《混凝土与水泥制品》
2024年第4期56-58,62,共4页
China Concrete and Cement Products
基金
大学生创新创业训练计划项目[贵大省创字2022(065)号]。
关键词
水稻秸秆纤维
混凝土
抗压强度
表面裂缝
析因分析
Rice straw fiber
Concrete
Compressive strength
Surface crack
Factorial analysis
