本文通过仪器测定了水泥基材料冻结时产生的冻胀力,试验结果发现水泥基材料冻结时也会产生冻胀力,且净浆试件冻胀力稍微大于砂浆试件,同时发现毛细孔充满液苯的砂浆试件冻结时也会产生冻胀力.结合冻胀力试验结果以及水和苯结晶过程的分析,推断冻结过程中水泥基材料内部产生冻胀力,而冻胀力产生的机理主要是结晶压.
参考文献
[1] | 慕儒,田稳苓,周明杰.冻融循环条件下混凝土中的水分迁移[J].硅酸盐学报,2010(09):1713-1717. |
[2] | 王萧萧,申向东.不同掺量粉煤灰轻骨料混凝土的强度试验研究[J].硅酸盐通报,2011(01):69-73,78. |
[3] | 刘大鹏,霍俊芳.纤维轻骨料混凝土冻融损伤模型研究[J].硅酸盐通报,2009(03):568-571. |
[4] | Olivier Coussy;Paulo J.M. Monteiro .Poroelastic model for concrete exposed to freezing temperatures[J].Cement and Concrete Research,2008(1):40-48. |
[5] | 李田;刘西拉.混凝土结构耐久性分析与设计[M].北京:科学出版社,1999 |
[6] | Stella M .The effect of variation in pore structure on the frost resistance of porous materials[J].Cement and Concrete Research,1981,11(01):115-124. |
[7] | Powers T C;Helmuth R A .Theory of volume changes in hardened Portland cement paste during freezing[J].Proceedings Highway Research Board,1953,32:285-297. |
[8] | Beaudoin J J;Macinnis C .The mechanism of frost damage in hardened cement paste[J].Cement and Concrete Research,1974,4(02):139-147. |
[9] | Helmuth R A.Capillary size restrictions on ice formation in hardened Portland cement pastes[A].Washington,DC:National Bureau of Standards,1962:855-869. |
[10] | 杨钱荣,杨全兵.灌浆材料结冰压的影响因素[J].低温建筑技术,2006(04):4-6. |
[11] | 杨全兵.NaCl溶液结冰压的影响因素研究[J].建筑材料学报,2005(05):495-498. |
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