STUDY ON CARBONATION RATE COEFFICIENTS OF CONCRETE USING FLY ASH CEMENT (TYPE-B) IN OUTDOOR EXPOSURE TEST

Abstract

This paper describes the results of research study on carbonation rate coefficients of concrete using fly ash cement (type-B) in outdoor exposure test continued more than five years. As the result, the main conclusions are as follows. 1) The carbonation rate coefficients of concrete using fly ash cement can be expressed by the water-cement ratio. 2) The water-binder ratio has a good association with carbonation rate coefficient ratio. 3) The cement factor (α₂) of the AIJ durability design recommendation can be calculated with 1.1 and the water-binder ratio factor (α₃) can be calculated with (W/(C+F) - 0.304).