聚丙烯纤维对混凝土力学性能的影响

通过聚丙烯纤维混凝土的力学试验,研究了聚丙烯纤维掺量对混凝土基本性能的影响。试验结果表明:聚丙烯纤维混凝土的抗压强度、劈拉强度均随纤维掺量的增加而降低,当掺量由0增加到1.2 kg/m3时,纤维混凝土7 d抗压、抗拉强度与基准混凝土相比,分别降低了11.4%和8.7%,28 d强度则分别降低了12.1%和3.6%,而混凝土抗冲击能力则提高了4.76倍;同时由于聚丙烯纤维的加入使得混凝土具有较高的韧性,对防止普通混凝土在荷载作用下的变形及裂缝的发生具有重要意义。

Impact on concrete's mechanical properties of polypropylene fiber

The influence of mix quantity of polypropylene fiber to the key property of concrete was studied based on the mechanical experiment of polypropylene fiber concrete.The test result indicated that both the compressive strength and the splitting tensile strength of polypropylene fiber concrete were reduced with the increase of the mix quantity of the fiber.When the mix quantity increased from 0 to 1.2 kg/m3,the 7 d resistant to compression and the tensile strength of the fiber concrete reduced by 11.4% and the...