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碳化过程中大水灰比水泥浆体孔结构的变化(英文)

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Abstract:

使用特殊的增黏剂与聚羧酸减水剂,制备了掺加石灰石粉、高炉矿渣、硅灰等混合材的普通波特兰水泥浆体和和低热硅酸盐水泥浆体(水粉比为1.0)。这些水泥浆体在20℃的水中养护4年后基本完全水化。这些硬化水泥浆体在5%(质量分数)CO2、相对湿度66%和温度20℃条件下进行碳化,对比研究碳化前后水泥浆体孔结构的变化。结果显示碳化浆体内孔直径大于10nm的孔体积明显减少;碳化浆体的孔径分布向大孔径范围偏移;掺加混合材的硬化水泥浆体结构明显趋于松散;与不掺加任何混合材的水泥浆体相比,掺加混合材的水泥浆体的孔径更大。

References

[1]  GLASSER F P,MARCHAND J,SAMSON E.Durability of concrete-Degration phenomena involving detrimental chemical reactions[C]//12th International Symposium on Chemistry of Cement,Montreal,Canada,2007THPL-1. [2]KOYANAGI K,MIYAMOTO H,HODAKA H.Basic studies of ce-ment slurry using newly developed special type of viscosity thickener[C]//Proceedings of annual meeting Cement Association of Japan(in Japanese),2003,42-43. [3]ASAGA K,YANAGISAWA T,SEKI T et al.Hydration of Portland cement pastes with large water cement ratio and microstructure in the hardened cement pastes[J].Cem Sci Concr Technol(in Japanese),2005,59:59-65. [4]ASAGA K,SEKI T,TAGUCHI N,et al.Effect of admixtures on the hydration of Portland cement pastes with large water cement ratio and microstructure in the hardened cement pastes[J].Cem Sci Concr Technol(in Japanese),2006,60:9-16. [5]SKAMOTO M,ASAGA K.Characterization of the hardened cement pastes with large water cement ratio cured for2years[J].Cem Sci Concr Technol(in Japanese),2007,61:25-32. [6]ASAGA K,ITO M,MIYASHITA M,et al.Water permeability of the hardened cement pastes with large cement water ratio and elution of ions,change of microstructure by the permeable water[J].Cem Sci Concr Technol(in Japanese),2007,61:71-78. [7]ASAGA K,SHIRAKAWA Y,SAKAMOTO M.Hydration of Eco cement psate with large water cement ratio and microstructure of the hardened cement Cement[J].Cem Sci Concr Technol(in Japanese),2008,62:54-61. [8]CHEN D P,SAKAI E,OHBA Y,et al.Influence of precuring on the pore structure of carbonated low heat portland cement paste with or without EVA[C]//6th International Symposium on Cement&Concrete,Xi'an,China,2006,546-551. [9]MORIOKA M,YAMAMOTO K,DAIMON M,et al.Carbonation mechanism of highly fluid concrete containing slowly cooled blast furnace slag powder[J].Concr Library International,2003,41:129-137.

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