| 粉煤灰对水泥浆体早期水化和孔结构的影响 |
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| 引用本文： | 施惠生,方泽锋.粉煤灰对水泥浆体早期水化和孔结构的影响[J].硅酸盐学报,2004,32(1):95-98. |
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| 作者姓名： | 施惠生 方泽锋 |
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| 作者单位： | 同济大学,混凝土材料研究国家重点实验室,上海,200092 |
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| 基金项目： | 上海市重点学科建设项目,国家重点基础研究发展规划“973"资助项目(2001CB6107)。 |
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| 摘 要： | 通过硬化水泥浆体力学性能、交流阻抗和孔结构等性能的测试,以及扫描电镜分析,研究了不同掺量的粉煤灰对硬化水泥浆体早期水化和孔结构的影响。结果表明：随着粉煤灰掺量的增加,水泥的凝结时间增加,抗压强度降低,熟料矿物的水化速率提高,但水泥-粉煤灰体系的水化速率降低,水泥浆体中孔溶液电阻和阻抗相应降低,硬化水泥浆体中大孔数量减少,微孔数量增加。
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| 关 键 词： | 粉煤灰 水泥浆体 抗压强度 阻抗 孔结构 孔径分布 |
| 文章编号： | 0454-5648(2004)01-0095-04 |
| 修稿时间： | 2003年5月14日 |
INFLUENCE OF FLY ASH ON EARLY HYDRATION AND PORE STRUCTURE OF CEMENT PASTES |
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| SHI Huisheng,FANG Zefeng.INFLUENCE OF FLY ASH ON EARLY HYDRATION AND PORE STRUCTURE OF CEMENT PASTES[J].Journal of The Chinese Ceramic Society,2004,32(1):95-98. |
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| Authors: | SHI Huisheng FANG Zefeng |
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| Abstract: | The influence of fly ash with different additions on the early hydration and the pore structure of cement pastes were investigated by means of the mechanical tests, scatting electron microscopy, alternating current impedance and Mercury Intrusion Porosime-try (MIP). The results show that an increase of the fly ash addition in the cement causes a longer setting time of the cement, a decrease of the compressive strength, and an increase of the hydration velocity of clinker mineral. In addition, hydration velocity of the whole cement - fly ash system decreases. The electric resistance and the impedance in the pore solution decrease. The number of macro-pores becomes fewer in the cement pastes, but the number of micro-pores becomes more. |
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| Keywords: | fly ash cement paste compressive strength impedance pore structure pore distribution |
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