研究了钢纤维、聚丙烯纤维和PVA纤维的不同掺量以及纤维复掺在90℃、200℃和400℃高温养护时活性粉末混凝土的力学性能和微观结构.结果表明,200℃高温养护,单掺钢纤维时,RPC的抗折强度与90℃的相近,但抗压强度提高,迭210.2MPa;单掺聚丙烯纤雏时,由于其高温熔解,形成三维网络结构,与RPC融为一体,抗压强度显著提高,当掺量为1.5%(体积分数)时,强度达242.6MPa.纤维复掺时抗折强度与钢纤维相近,但抗压强度有所提高,200℃养护时达265 MPa.400℃养护时,随水胶比降低,强度进一步增大,当水胶比为0.12时,抗压强度达333.4MPa.
参考文献
| [1] | Pierre Kalifa;Gregoire Chene;Christophe Ga1le .High-temperature behaviour of HPC with polypropylene fibres From spalling to microstructure[J].Cement and Concrete Research,2001(10):1487-1499. |
| [2] | Lau A;Anson M .Effect of high temperatures on high performance steel fibre reinforced concrete[J].Cement and Concrete Research,2006,36:1698. |
| [3] | Haddad R H;AI-Saleh R J;A1-Akhras N M .Effect of elevated temperature on bond between steel reinforcement and fiber reinforced concrete[J].Fire Safety Journal,2008,43:334. |
| [4] | Poon C S;Shui Z H;Lam L .Compressive behavior of fiber reinforced high-performanee concrete subjected to elevatedtemperatures[J].Cement and Concrete Research,2004,34:2215. |
| [5] | 张道玲,鞠丽艳.复合纤维对高性能混凝土高温性能的影响研究[J].工业建筑,2005(01):8-10,14. |
| [6] | 赵军,高丹盈.高温后聚丙烯纤维高强混凝土力学性能试验研究[J].四川建筑科学研究,2008(01):133-135. |
| [7] | 王平,陈瑞生,郑学斌,肖建庄.聚丙烯纤维对高性能混凝土高温后力学性能的影响试验研究[J].工业建筑,2005(11):67-69,77. |
| [8] | 鞠丽艳,张雄.聚丙烯纤维对高性能混凝土高温性能的影响[J].建筑材料学报,2004(01):25-28. |
| [9] | 蒋玉川;朋改非 等.网状聚丙烯纤维和PVA纤维对高性能混凝土高温性能的影响[J].商品混凝土,2006,4:31. |
| [10] | Pierre Richard;Marcel Cheyrezy .Composition of reactive powder concretes[J].Cement and Concrete Research,1995,25(07):1501. |
| [11] | Marcel Cheyrezy;Vincent Maret;Laurent Frouin .Microstructural analysis of RPC (reactive power concrete)[J].Cement and Concrete Research,1995,25(07):1491. |
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