Mix Performance and Mechanical Properties of High Strength Concrete using Blast Furnace Slag Fine Aggregate
By D. S. Shi, Y. Masuda, M. Abe and T. Kage
Concrete Journal, Vol.51, No.2, Feb. 2013
- Synopsis
- In this study, mix performance and mechanical properties of concrete using blast furnace slag fine aggregate were studied by experiment. As ordinary strength concrete, it is necessary that the water content and the chemical admixture content of concrete using blast furnace slag fine aggregate would be increased than river sand concrete in order to gain uniform workability of fresh concrete. However, the mix performance of high strength concrete using blast furnace slag fine aggregate is same as high strength concrete using river sand by using chemical admixture. As same as concrete using river sand, the strength of concrete using blast furnace slag fine aggregate will increase with decrease of water-cement ratio and the compressive strength can exceed 100 N/mm2. At early age, the compressive strength of concrete using blast furnace slag fine aggregate is lower than river sand concrete. Under long term curing, the increasing rate of compressive strength of ordinary strength concrete using blast furnace slag fine aggregate will be higher than river sand concrete, but this increasing rate will be lower when the strength of concrete was high. Young's modulus of concrete using blast furnace slag fine aggregate is greater than concrete using river sand, and Young's modulus of concrete using mixed fine aggregate is middle of concrete using river sand and using blast furnace slag. The drying shrinkage of concrete that used blast furnace slag as fine aggregate is less than concrete that used natural river sand as fine aggregate when the mix proportion condition of concrete was identical.
- Keywords:
- blast furnace slag fine aggregate, concrete, high strength, mix performance, mechanical properties, drying shrinkage
