Mechanical properties of polymer-modified concretes containing expanded polystyrene beads
Mechanical properties of polymer-modified concretes containing expanded polystyrene beads
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DOI：
10.1016/j.conbuildmat.2005.08.001
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发表时间：
2007-01-01
影响因子：
7.4
通讯作者：
Liu, Juanyu
中科院分区：
文献类型：
--
作者：
Chen, Bing;Liu, Juanyu
本研究将丁苯橡胶（SBR）乳胶作为聚合物外加剂应用于轻质膨胀聚苯乙烯（EPS）混凝土中。研究了养护条件和聚合物水泥比对聚合物改性EPS混凝土抗压强度和抗弯强度的影响。因此，聚合物改性EPS混凝土的强度发展很大程度上取决于养护条件。干湿复合养护能够同时发挥水泥基体和SBR膜的强度。在EPS混凝土中掺入一定聚合物水泥比的SBR胶乳，由于SBR膜在水泥基体中形成，改善了水泥基体与EPS颗粒之间的粘结。此外，SBR改性能显著提高普通EPS混凝土的抗弯强度。与EPS混凝土相比，聚合物改性EPS混凝土的抗压强度在28d后仍能逐渐提高。(c) 2005 Elsevier Ltd版权所有。
In this study, styrene-butadiene rubber (SBR) latex as a polymeric admixture was applied in lightweight expanded polystyrene (EPS) concrete. The effects of curing conditions and polymer-cement ratio on the compressive and flexural strengths of polymer-modified EPS concretes were investigated. As a result, the strength development of the polymer-modified EPS concretes strongly depends on the curing conditions. Combined dry and wet curings enable to develop both the strengths of cement matrix and SBR films together. Inclusion of SBR latex at a certain polymer-cement ratio in the EPS concrete improves the bonds between the cement matrix and EPS particles due to the SBR films formed in the cement matrix. In addition, SBR modification can significantly improve the flexural strength of the normal EPS concrete. Compared with the EPS concrete, the compressive strength of the polymer-modified EPS concretes can increase gradually even after 28 days. (c) 2005 Elsevier Ltd. All rights reserved.