应用亚麻纤维减少混凝土塑性收缩开裂的研究  

Study of use of flax fibres to reduce the plastic shrinkage cracking in concrete

作　　者：徐蕾[1] 

机构地区：[1]新疆工程学院,新疆乌鲁木齐830091

出　　处：《混凝土》2013年第10期91-94,共4页Concrete

基　　金：新疆工程学院校内课题资助(2012XGZ211412)

摘　　要：对含短亚麻纤维的小份砂浆样品的限制性和无限制性塑性收缩性能进行了试验研究。基于浇筑后暴露于热、干燥和有风条件后第一个24 h内产生的裂缝数量、裂缝总面积以及最大裂缝宽度,试验发现:亚麻纤维在控制混合砂浆限制性塑性收缩方面,比市场所售的聚丙烯和玻璃纤维更为有效。当亚麻纤维的体积分率处于0.3%时,与普通砂浆相比,产生的裂缝总面积至少减少了99.5%,最大裂缝宽度不到0.022 mm,比以往减少了98.5%。Some experimental was performed to measure the restrained and unrestrained plastic shrinkage properties of small motar specimens containing short flax fibres in amounts ranging from 0.05% to 0.3% by volume.Based on the number of cracks,total crack area, and maximum crack widths produced within the first 24 h after casting and exposure to hot, dry, and windy conditions, flax fivres were found to be slightly more effective in controlling restrained plastic shrinkage cracking than commercially available polypropylene and glass fibres for the motar mixture studied.At a flax fivre volume fraction of 0.3% ,total crack areas were reduced by at least 99.5% relative to plain mortar specimens and maximum crack widths were reduced by 98.5% to less than 0.022 mm.

关 键 词：混凝土 短亚麻纤维 塑性开裂 限制性 

分 类 号：TU528.572[建筑科学—建筑技术科学]