Example of Application of Concrete Using a Large Amount of Fly Ash to a Building Structure
By K. Motomura, H. Tsuzuki, D. Hashiguchi and S. Kuroiwa
Concrete Journal, Vol.57, No.7, Jul. 2019
- Synopsis
- Active use of fly ash as a concrete admixture holds promise for the reduction of CO2emissions and the effective utilization of resources, and the accumulation of technical knowledge regarding the application of fly ash based concrete to building construction works is desirable as instances of such application are still few in number. When concrete using a large amount of fly ash is applied to a building structure, there are issues such as fresh properties, change in air content over time, concrete strength correction value, exothermic characteristics, and carbonation resistance. This paper about a construction project where concrete using a large amount of fly ash was applied describes, among other things, a preliminary test that determined concrete strength correction value 28S91 equivalent to fly ash cement type C to be 0, the results of quality control tests on the fly ash used and the produced concrete, which exceeded 30000m3 in volume, as well as the temperature measurement results for the actual structure.
- Keywords:
- fly ash, mineral admixture, replacement ratio, change over time, concrete strength correction value, internal temperature, quality control
