Anti-crack performance of low-heat Portland cement concrete

Abstract

The properties of low-heat Portland cement concrete(LHC) were studied in detail. The experimental results show that the LHC concrete has characteristics of a higher physical mechanical behavior, deformation and durability. Compared with moderate-heat Portland cement(MHC), the average hydration heat of LHC concrete is reduced by about 17.5%. Under same mixing proportion, the adiabatic temperature rise of LHC concrete was reduced by 2 °C–3°C,and the limits tension of LHC concrete was increased by 10×10⁻⁶–15×10⁻⁶ than that of MHC. Moreover, it is indicated that LHC concrete has a better anti-crack behavior than MHC concrete.

Keywords

low-heat portland cement / mass concrete / high crack resistance / moderate-heat portland cement

References

[1] C X Yu, Z Kong. Research on the Causes of Cracks in Mass Concrete and Control Measures [J]. Low Temperature Architecture Technology (China), 2005 (5): 112–113

[2] A A Almusallam, M Maslehuddin. Effect of Mix Proportions on Plastic Shrinkage Cracking of Concrete in Hot Environments[J]. Construction and Building Materials, 1998 (12): 353–358

[3] Xu J., An Z. Countermeasure of Temperature Crack of Mass Concrete[J]. Journal of Hebie Institute of Architectural Engineering, 2005, 23(3): 36-40.

[4] Peng Weibing, Ren Aizhu. Effects and Evaluation on Cracking of Concrete Incorporating Supplementary Cementitious Materials[J]. Concrete (China), 2005 (6): 50–64

[5] Xiao Reimin, Zhang Xiong. Effect of Binder on Drying Shrinkage of Concrete [J].China Concrete and Cement Products, 2002 (5): 11–13

[6] Ye Q., Chen X. Research on the Expansive Mechanism of Moderate Heat Portland Cement with Slight Expansion [J]. Journal of the Chinese Ceramic Society, 2000, 128(4): 335-347.

[7] Shi Xun. Application of Slight Expansion Cement on Concrete of Stage II Works of the Three Gorges Project [J]. Cement (China). 2002 (5): 12–14

[8] Nagaokas Mizukosui M. Property of Concrete Using Beliterich Cement and Ternary Blended Cement [J]. Journal of the Society of Materials Science, Japan, 1994, 43(491): 488-492.

[9] Ge J. Technology Progress of Cement and Concrete [M], 1993. Beijing: China Building Material Industry Press. 275-276.

[10] Metha P. K. Investigation on Energy-saving Cement[J]. World Cement Technology, 1980, 1(3): 166-177.

[11] Taylor. Cement Chemistry[M], 1990. London: Academic Press. 142-152.

[12] Sui T., Liu K. A Study on Properties of High Belite Cement [J]. Journal of the Chinese Ceramic Society, 1999, 127(4): 488-492.

[13] Yang Nanru, Zhong Baixi. Study on Active-C₂S[C]. Symposium on Cement,1983:180–185

[14] Yang H., Li W. Research and Application of Hydroelectric Concrete[M], 2004. Beijing: China Water Power Press. 393-394.

[15] E Ringot, A Bascoul. About the Analysis of Micro-cracking in Concrete[J]. Cement and Concrete Composites, 2001 (23): 261–266

[16] Li G. Assessment for Anti-Crack Performance of Concrete [J]. Advances in Science and Technology of Water Resources (China), 2001, 21(2): 33-36.

[17] Liu Shuhua, Fang Kunhe. Summarization of Norm of Crack Resistance of Concrete[J]. Highway (China), 2004 (4): 105–107

[18] Frank Collins, J G Sanjayan. Cracking Tendency of Alkali-Activated Slag Concrete Subjected to Restrained Shrinkage[J]. Cement and Concrete Research, 2000 (30): 791–798