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Title |
Fundamental Properties of Self-Compacting Concrete Using Viscosity Modifying Admixture
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Keywords |
Self-compacting concrete; Viscosity modifying admixture; Hydroxyethyl cellulose; Superplasticizer; Fly ash; Coarse aggregate content; Cement content; Setting time |
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Abstract |
Hydroxyethyl cellulose -based-viscosity modifying admixture and melamine-basd-superplasticizer were selected to be admixtures for self-compacting concrete based on the test results of fluidity and air content of mortar using 3 different viscosity modifying admixtures. The experimental results show that the initial and final set of self-compacting concrete and fly ash concrete with viscosity modifying admixture only have been delayed approximately 5 hours and 8~9 hours, respectively. It is found that the optimum dosage of viscosity modifying admixtures, coarse aggregate and cement content are 0.2% of water content, under 742 kg/㎥ and over 364 kg/㎥, respectively. Test results also show that the optimum fly ash in replacement of cement is 10% of cement weight for the enhancement of fluidity and long-term strength.
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