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Title |
A Stress-Strain Relationship of Alkali-Activated Slag Concrete
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Keywords |
알칼리 활성 슬래그 콘크리트 ; 응력-변형률 관계 ; 압축강도 ; 단위용적질량 AA slag concrete ; stress-strain relationship ; compressive strength ; unit weight |
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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 2,186 kg/m3 to 2,343 kg/m3, 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.
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