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Title |
The Quality Properties of Self-Compacting Concrete Mixed with Tailing from the Sangdong Tungsten Mine
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Keywords |
tailings from the Sangdong tungstem mine as powder(TA) ; self-compacting concrete(SCC) ; elastic modulus ; dry shrinkage rate ; accelerated carbonation |
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Abstract |
This study has focused on the possibility for recycling of tailings from the Sangdong tungsten mine as powder(TA) of self-compacting concrete(SCC). The experimental tests for slump-flow, time required to reach 500mm of slump flow(sec), time required to flow through V-funnel(sec) and filling height of U-box test(mm) were carried out in accordance with the specified by the Japanese Society of Civil Engineering(JSCE). The results of this study, slump-flow of SCC was satisfied a prescribed range. And time required to reach 500mm of slump flow(sec) and time required to flow through V-funnel(sec) decreased with increasing replacement of TA. But filing height of U-box test(mm), replacement of TA up to 30% were satisfied a prescribed range. The mechanical properties including compressive strength, splitting tensile strength and elastic modulus were checked with the requirements specified by Korean Industrial Standards(KS). The compressive strength of SCC decreased with increasing replacement of TA, splitting tensile strength and elastic modulus were similar to those of normal concrete. The fundamental durability was reviewed through the dry shrinkage rate and accelerated carbonation tests. As the result, dry shrinkage rate and accelerated carbonation depth increased with increasing replacement of TA.
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