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The Influence of Pore-Strucrure on the Campressive Strength of Hardened Cement Paste

Published online by Cambridge University Press:  22 February 2011

Huang Yiun-Yuan
Professor, Dept. of Materials Science and Engineering, Tongji University, Shanghai, China
Ding Wei
Engineer, Jiang Xi Provincial Institute of Scientific Research and Engineering Design of Building Materials, Nan Chang, China
Lu Ping
Research Assistant, Dept. of NSE, Tongji University, Shanghai, China
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The pore-structure strongly influences the carpressive strength of hardened cement paste (hcp) and other porous materials, as well as other mechanical properties. The simplest but most currently used expression representing the relationship between the pore-structure and compressive strength is fram Balshin: σ = σ0 (l-P)A, in which only the total porosity P is involved as a single parameter and σ0 and A are empirical constants. The influence of pore size distribution and pore shapes etc. are not considered.

The authors introduce second parameter w - the factor of relative specific surface area of the pores other than the total porosity P into consideration and a new expression is proposed:σc=K11-p/1+2p(K2(1-p))K3w+K4 all the constants K1 - K4 can be determined experimentally. By using of this expression the new information relating the influence of pore-structure on the caopressive strength of hcp can be predicted.

Research Article
Copyright © Materials Research Society 1985

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