STUDY ON THE ANTI-CRACKING AND IMPERMEABILITY PROPERTIES OFPOLYPROPYLENE FIBER REINFORCED EXPANSIVE CONCRETE
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摘要: 研究了聚丙烯纤维和微膨胀复合对混凝土抗折强度、抗渗性和收缩变形的影响。研究表明,聚丙烯纤维和膨胀剂复合与聚丙烯纤维或膨胀剂单一作用比,28d抗折强度分别提高75%和99%,渗水高度分别降低46%和61%,阻裂效果显著提高;纤维对膨胀混凝土7~14d的膨胀有明显的约束。Abstract: The influence of compounding polypropylene fiber and expansion on flexure strength, impermeability and the shrinkage deformation is studied.The experimental results show the comparing with the single effect of either polypropylene fiber or expansive agent, the compounding of them can enhance 28 days flexure strength by 7^5% and 9^9% and reduce the permeability height by 46% and 61% separately and it can also sharply increase the anti-cracking property.The polypropylene fiber can obviously restrict the 7~14 days expansion of expansive concrete.
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Key words:
- polypropylene fiber /
- expansive concrete /
- anti-cracking impermeability /
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McDonald, J E, Vaysburd A M, Emmons P H, et al.Selecting Durable Repair Materials:Serformance Criteria.Concrete International, 2002, 24(1) [2] 游宝坤.建筑结构裂渗控制新技术.北京:中国建材工业出版社, 1998 [3] 杨医博, 文梓芸.混凝土工程裂缝控制的系统方法.混凝土, 2001(4)
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