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[1] Zhou Shuangxi, Chen Yimin, Zhang Wensheng, et al. Prediction of compressive strength of cement mortarswith fly ash and activated coal gangue [J]. Journal of Southeast University (English Edition), 2006, 22 (4): 549-552. [doi:10.3969/j.issn.1003-7985.2006.04.022]
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Prediction of compressive strength of cement mortarswith fly ash and activated coal gangue()
掺活化煤矸石粉、粉煤灰水泥砂浆抗压强度预测
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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:
22
Issue:
2006 4
Page:
549-552
Research Field:
Chemistry and Chemical Engineering
Publishing date:
2006-12-30

Info

Title:
Prediction of compressive strength of cement mortarswith fly ash and activated coal gangue
掺活化煤矸石粉、粉煤灰水泥砂浆抗压强度预测
Author(s):
Zhou Shuangxi1;  2;  Chen Yimin1;  Zhang Wensheng1
1China Building Materials Academy, Beijing 100024, China
2School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, China
周双喜1;  2;  陈益民1;  张文生1
1中国建筑材料科学研究总院, 北京 100024; 2华东交通大学土木工程学院, 南昌 330013
Keywords:
thermal activated coal gangue;  simplex-centroid design;  predicating equation;  compressive strength
热活化煤矸石;  单纯形-中心设计;  预测方程;  抗压强度
PACS:
TQ172
DOI:
10.3969/j.issn.1003-7985.2006.04.022
Abstract:
The pozzolanic activity of coal gangue, which is calcining at 500 to 1 000 ℃, differs distinctly.The simplex-centroid design with upper and lower bounds of component proportion is adopted to study the compressive strength of mortars made with ternary blends of cement, activated coal gangue and fly ash.Based on the results of a minimum of seven design points, three special cubic polynomial models are used to establish the strength predicating equations at different ages for mortars.Five experimental checkpoints were also designed to verify the precision of the equations.The most frequent errors of the predicted values are within 3%.A simple and practical way is provided for determining the optimal proportion of two admixtures when they are used in concrete.
煤矸石经不同的温度(500~1 000 ℃)热活化后, 其辅助胶凝性能相差很大.为了研究双掺活化煤矸石与粉煤灰对水泥强度性能的影响, 运用单纯形-中心设计方法, 并确立各组分的上下限, 通过7组砂浆实验, 得出活化煤矸石粉、粉煤灰多元复合水泥不同龄期强度数学模型, 并利用5组砂浆实验, 对强度预测方程的精确性进行了研究.实验结果表明方程的计算值与实验测量值相差很小, 误差范围在3%以下.为配制多种混合材的复合水泥最优配比提供了一个简单实用的方法.

References:

[1] National State Economic and Trade Commission.Policy point of coal gangue utilization[J].Coal Clean Technology, 2000, 6(1):56.(in Chinese)
[2] Li Dongxu, Song Xuyan, Gong Chenchen, et al.Research on cementitious behavior and mechanism of composite cement with coal gangue[J].Journal of the Chinese Ceramic Society, 2004, 32(3):358-363.(in Chinese)
[3] Aitcin Pierre-Claude.Cements of yesterday and today concrete of tomorrow [J].Cement and Concrete Research, 2000, 30(9):1349-1359.
[4] Shen D S, Mao Z E.High quality fly ash concrete[M].Shanghai:Shanghai Science and Technology Press, 1992.54-57.(in Chinese)
[5] Douglas E, Pouskouleli G.Prediction of compressive strength of mortars made with Portland cement-blast furnace slag-fly ash blends [J].Cement and Concrete Research, 1991, 21(4):523-534.
[6] Wang Dehuai, Chen Zhaoyuan.On prediction compressive strengths of mortars with ternary blends of cement, GGBFS and fly ash [J].Cement and Concrete Research, 1997, 27(4):488-493.
[7] Wadsworth Harrison M.Handbook of statistical methods for engineers and scientists[M].McGraw-Hill, Inc, 1990.

Memo

Memo:
Biographies: Zhou Shuangxi(1973—), male, graduate;Chen Yimin(corresponding author), male, doctor, professor, chenym3@163.com.
Last Update: 2006-12-20