[1]张云升,孙伟,郑克仁,等.水泥-粉煤灰浆体的水化反应进程[J].东南大学学报(自然科学版),2006,36(1):118-123.[doi:10.3969/j.issn.1001-0505.2006.01.024]
　Zhang Yunsheng,Sun Wei,Zheng Keren,et al.Hydration process of Portland cement-fly ash pastes[J].Journal of Southeast University (Natural Science Edition),2006,36(1):118-123.[doi:10.3969/j.issn.1001-0505.2006.01.024]
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水泥-粉煤灰浆体的水化反应进程()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
36
期数:
2006年第1期
页码:
118-123
栏目:
材料科学与工程
出版日期:
2006-01-20

文章信息/Info

Title:
Hydration process of Portland cement-fly ash pastes
作者:
张云升1;  孙伟1;  郑克仁1;  贾艳涛2
1 东南大学材料科学与工程系, 南京 210096; 2 河海大学材料材料科学与工程系, 南京 210016
Author(s):
Zhang Yunsheng1;  Sun Wei1;  Zheng Keren1;  Jia Yantao2
1 Department of Materials Science and Engineering, Southeast University, Nanjing 210096, China
2 Department of Materials Science and Engineering, Hohai University, Nanjing 210016, China
关键词:
水泥;  粉煤灰;  反应程度;  胶空比;  力学性能
Keywords:
Portland cement;  fly ash;  degree of reaction;  gel/space ratio;  mechanical properties
分类号:
TU528
DOI:
10.3969/j.issn.1001-0505.2006.01.024
摘要:
为考察粉煤灰对水泥水化进程的影响,系统研究了水泥-粉煤灰浆体在不同养护龄期、水胶比、粉煤灰掺量下水泥和粉煤灰反应程度、非蒸发水数量、水化产物数量、孔结构和浆体力学性能.根据实验结果,建立了水泥-粉煤灰浆体中水泥反应程度与有效水灰比间的定量关系,推导出水泥和粉煤灰反应程度与胶空比之间的计算公式,并通过研究胶空比与浆体抗压强度关系曲线和比较胶空比与实测孔隙率来验证该公式的正确性; 另外,还对水泥-粉煤灰浆体的非蒸发水量与水化产物数量间的关系进行了研究,结果表明二者呈线性相关,可用非蒸发水量反映水化产物数量.
Abstract:
To explore the hydration process of Portland cement-fly ash system, the reaction degree of fly ash and Portland cement, non-evaporable water content, amount of hydration products, porosity and compressive strength of pure cement pastes and cement-fly ash pastes were studied at various curing ages, water-to-binder ratio(W/B), and fly ash replacement percentages. Based on the experimental results, the relationship between the degree of cement hydration and the effective water-to-cement(W/C)ratio, which is given by W/(C+αFF), is established. An equation describing the dependence of gel/space ratio on the degree of cement hydration and fly ash reaction is also proposed. The calculated gel/space ratios for cement-fly ash pastes are consistent with those for pure cement pastes in terms of their relationship with compressive strength. The proposed equation is verified by comparing the calculated gel/space ratios with the measured porosity by mercury intrusion porosimetry. Thus the proposed equation has been justified. In addition, the relationship between non-evaporable water content and amount of hydration products calculated by the degree of cement hydration and fly ash reaction is explored. The linear correlativity shows that the amount of hydration products can be figured out by using non-evaporable water content.

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备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(50278018)、南京水利科学研究院开放流动研究基金资助项目(Yk90508)、教育部重点实验室开放基金资助项目(SYSJJ2004-02).
作者简介: 张云升(1974—),男,博士,讲师, zhangys279@163.com.
更新日期/Last Update: 2006-01-20