摘要
为探索优化短聚丙烯纤维混凝土力学性能的可能性,掌握短聚丙烯纤维对混凝土力学性能的影响规律,研究将215、260、350 kg/m^(3)等水泥用量的混凝土分别添加4、6、9 mm的细聚丙烯纤维,与同类型无纤维的混凝土一同,形成12个试件组进行对比试验。试件组的抗折强度试验以及其中的残件抗压强度试验结果显示,并非所有长度的短聚丙烯纤维都会降低混凝土的强度,“纤维长度”与“水泥用量”的不同组合会产生不同的强度效果。经数据分析,在350 kg/m^(3)水泥用量的混凝土中添加6 mm的聚丙烯纤维,会形成抗折和抗压强度相对较高的纤维混凝土。
In order to explore the possibility of optimizing the mechanical properties of short polypropylene fiber concrete and deeply analyze the influence of short polypropylene fiber on the mechanical properties of concrete,the concrete with cement dosage of 215 kg/m~3,260 kg/m~3 and 350 kg/m~3 was added with fine polypropylene fiber of 4 mm,6 mm and 9 mm respectively,with the same type of non-fiber concrete in addition.Twelve specimen groups were formed for comparison test.The flexural strength test results of the specimen groups and the compressive strength test results of the residual parts,show that not all kinds of fiber length will reduce the strength of short polypropylene fiber concrete.Different combinations of“fiber length”and“cement dosage”will produce different strength effects.According to the data analysis,adding 6mm polypropylene fiber to the concrete with 350kg/m~3 cement dosage can form fiber concrete with higher index value of flexural strength and compressive strength.
作者
黎祥
LI Xiang(China Railway 16th Bureau Group Corporation Limited,Beijing 101502,China)
出处
《混凝土》
CAS
北大核心
2022年第11期87-90,100,共5页
Concrete
基金
江门市科技计划项目(202103010217005026)。
关键词
聚丙烯纤维
混凝土
组合
强度
polypropylene fiber
concrete
combination
strength
