孙 旻1,王 军2,王 洋3
孙旻,王军,王洋.纤维增强磷酸钾镁水泥砂浆工作性、力学性能与韧性研究[J].混凝土与水泥制品,2024(1):64-66.
SUN M,WANG J,WANG Y.Study on workability, mechanical properties and toughness of fiber reinforced potassium magnesium phosphate cement mortar[J].China Concrete and Cement Products,2024(1):64-66.
纤维增强磷酸钾镁水泥砂浆工作性、力学性能与韧性研究
孙 旻1,王 军2,王 洋3
孙旻,王军,王洋.纤维增强磷酸钾镁水泥砂浆工作性、力学性能与韧性研究[J].混凝土与水泥制品,2024(1):64-66.
SUN M,WANG J,WANG Y.Study on workability, mechanical properties and toughness of fiber reinforced potassium magnesium phosphate cement mortar[J].China Concrete and Cement Products,2024(1):64-66.
摘 要:为了改善磷酸钾镁水泥(MKPC)砂浆的脆性,研究了聚甲醛(POM)纤维的掺量(0~2.0%)对MKPC砂浆工作性、力学性能和韧性的影响,并进行了SEM分析。结果表明:随着POM纤维掺量的增加,砂浆的流动度和抗压强度均降低,抗折强度和折压比均先增大后减小,韧性提升;POM纤维在砂浆基体中主要发生拔出破坏,其桥连作用有效抑制了裂缝的产生和扩展。
Abstract: In order to improve the brittleness of potassium magnesium phosphate cement (MKPC) mortar, the effects of the content of polyoxymethylene (POM) fibers (0~2.0%) on the workability, mechanical properties and toughness of MKPC mortar were studied, and SEM analysis was conducted. The results show that with the increase of the content of POM fiber, the fluidity and compressive strength of the mortar decrease, while the flexural strength and flexural compression ratio first increase and then decrease, and the toughness improves. POM fibers mainly undergo pull-out failure in the mortar matrix, and their bridging effect effectively suppresses the generation and propagation of cracks.
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