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http://dx.doi.org/10.4334/JKCI.2011.23.6.765

A Stress-Strain Relationship of Alkali-Activated Slag Concrete  

Yang, Keun-Hyeok (Dept. of Architectural Engineering, Kyonggi University)
Song, Jin-Kyu (Dept. of Architectural Engineering, Chonnam National University)
Lee, Kyong-Hun (Bio-Housing Research Institute, Chonnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.23, no.6, 2011 , pp. 765-772 More about this Journal
Abstract
The present study summarizes a series of compressive tests on concrete cylinder in order to examine the stressstrain relationship of alkali-activated (AA) slag concrete. The compressive strength and unit weight of concrete tested ranged from 8.6 MPa to 42.2 MPa and from $2,186kg/m^3$ to $2,343kg/m^3$, respectively. A mathematical equation representing the complete stress-strain curve was developed based on test results recorded from 34 concrete specimens. The modulus of elasticity, strain at peak stress, slopes of ascending and descending branches of stress-strain curves were generalized as a function of compressive strength and unit weight of concrete. The mean and standard deviation of the coefficient of variance between measured and predicted curves were 6.9% and 2.6%, respectively. This indicates that the stress-strain relationship of AA slag concrete is represented properly with more accuracy in the proposed model than in some other available models for ordinary portland cement (OPC) concrete.
Keywords
AA slag concrete; stress-strain relationship; compressive strength; unit weight;
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