刘 煦,霍冀川,邓跃全,董发勤
纤维复掺对干混砂浆性能的影响研究
刘 煦,霍冀川,邓跃全,董发勤
摘 要: 研究了玄武岩纤维、聚乙烯醇纤维、聚丙烯纤维单掺及复掺对砂浆抗渗抗裂性能、吸水率、抗压抗折强度、线膨胀率的影响。结果表明,纤维能提高砂浆的抗渗抗开裂性能,降低砂浆吸水率,提高砂浆柔韧性,产生一定的膨胀以抵抗砂浆的内部收缩。纤维增强干混砂浆,复掺比单掺效果好。单掺时,增强效果为聚乙烯醇纤维>玄武岩纤维>聚丙烯纤维;复掺时,玄武岩纤维:聚乙烯醇纤维:聚丙烯纤维=1:0:2时,砂浆的抗渗抗裂性能及力学性能达到最佳。
Abstract: The influences of multi-mixing basalts fibers (BF), polyvinyl alcohol fiber (PVA) and polypropylene fiber (PPF) on impermeability, anti-cracking, water absorption, compressive strength, flexural strength, linear expansion rate of the mortar are investigated. The results show that fiber can improve the impermeability, anti-cracking and flexibility, reduce the water absorption of mortar, and resist internal shrinkage of mortar by producing certain expansion. Meanwhile, the properties of mortar is better reinforced with fibers multi-mixed than only mixed, and when fibers only-mixed, enhancing effect: PVA>BF>PPF. However, the impermeability, anti-cracking and mechanical properties of mortar reached optimum when BF: PVA: PPF=1:0:2.
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