摘要
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。
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 8.7% respectively comparing with those of the control concrete,the 28 d intensity of the fiber concrete reduced by 12.1% and 3.6% separately,but the anti-impact ability of concrete enhanced by 4.76 times.Moreover,the addition of the polypropylene fiber enabled a higher toughness of concrete,which is crucial to the prevention of deformation and cracks of normal concrete under loads.
出处
《水运工程》
北大核心
2011年第5期63-66,共4页
Port & Waterway Engineering
关键词
聚丙烯纤维
混凝土
力学性能
掺量
polypropylene fiber
concrete
mechanical property
incorporation rate
