聚丙烯纤维对风积沙砂浆性能的影响研究

通过分别掺入0、0. 3 kg/m^3、0. 7 kg/m^3、1. 0 kg/m^3、1. 3 kg/m^3和1. 8 kg/m^3的聚丙烯纤维,配制相同稠度风积沙砂浆,研究了聚丙烯纤维掺量对风积砂干混砂浆干缩、强度以及抗裂等性能的影响。结果表明,聚丙烯纤维能显著提高风积砂干混砂浆物理力学性能。聚丙烯纤维掺量在1. 3 kg/m^3以内,风积沙砂浆随其掺量增加,性能增强效果明显;掺量大于1. 3 kg/m^3,干缩性能以及力学性能出现倒缩;风积沙砂浆中聚丙烯纤维掺量适宜为1. 3 kg/m^3。在此掺量下,聚丙烯纤维不仅能改善风积沙砂浆的施工性能,而且可以提高其基本力学性能。

Effect of Polypropylene Fiber on Properties of Aeolian Sand Mortar

The same consistency of eolian sand mortar was prepared by blending polypropylene fibers of 0,0.3 kg/m^3,0.7 kg/m^3,1.0 kg/m^3,1.3 kg/m^3 and 1.8 kg/m^3 respectively.Effects of fiber content on physical properties such as shrinkage,strength and crack resistance of aeolian sand dry mortar were studied.The results show that polypropylene fiber can significantly improve the physical and mechanical properties of aeolian sand dry mortar.Polypropylene fiber content is within 1.3 kg/m^3,and with the increase of fiber content,the effect of aeolian sand mortar is obvious;when the content exceeds 1.3 kg/m^3,the shrinkage and mechanical properties are shrunk;the wind and sand accumulation mortar is aggregated.The suitable amount of propylene fiber is 1.3 kg/m^3.Under this dosage,polypropylene fiber can not only improve the construction performance of aeolian sand mortar,but also improve its basic mechanical properties.