纤维-聚合物对混凝土力学性能的影响

Effect of fiber-polymer on mechanical properties of concrete

针对当前高层建筑普通混凝土强度低、韧性差的现状,以不同乳胶粉掺量、矿粉掺量、纤维种类及掺量为影响因素,利用正交试验设计了9组纤维-聚合物混凝土,进行了抗压强度、劈裂抗拉强度、抗折强度试验,并基于试验结果提出了纤维-聚合物的最优配合比。结果表明:随着乳胶粉的增加,混凝土的强度均显著升高;随着3种纤维自身伸长率、弹性模量的增大,混凝土的抗压强度、劈裂强度和抗折强度均有不同程度的提高;当矿粉掺量为30%、纤维体积掺量为0.15%时,混凝土的和易性和力学性能最优。

In view of the current high-rise building low strength of ordinary concrete,the present situation of the poor toughness,with different powder content,mineral content,fiber type and dosage of influence factors,using the orthogonal test design for nine groups of fiber and polymer concrete,compressive strength,splitting tensile strength,flexural strength test,and put forward the fiber-polymer based on the test result of the optimal mixture ratio.The results show that the strength of concrete increases significantly with the increase of latex powder.With the increase of the elongation and elastic modulus of the three fibers,the compressive strength,splitting strength and flexural strength of the concrete are all increased in different degrees.The workability and mechanical properties of concrete are the best when the content of mineral powder is 30% and the volume content of fiber is 0.15%.