Affiliation:
1. Qingdao Agricultural University
Abstract
The purpose of this study was to improve the durability of fly ash concrete. As a result, by making fly ash concrete into non-air-entraining type and using durability improving admixture, the compressive strength of fly ash concrete increases 10%~30%, reducing initial compressive strength defects; drying shrinkage is controlled at 60% compared to when the mixture is not added; carbonation of fly ash concrete can be considered roughly proportional to water-cement ratio regardless of water-binder ratio or fly ash replacementratio; the freeze damage resistance improves for 2 weeks curing in air (drying process). Finally, by making fly ash concrete from non-air entraining type and using durability improving admixture, the difficulty of controlling air content in fly ash concrete is reduced and quality management is simplified.
Publisher
Trans Tech Publications, Ltd.
Reference4 articles.
1. V.M. Malhotra, A.A. Ramezanianpour: FLY ASH IN CONCRETE (Second edition), September (1994).
2. Hongzhu Quan, Hideo Kasami: Effects of change in fineness of fly ash on air-entrained concrete, Advanced Materials Research, Vols. 168-170, pp.2195-2199, (2011).
3. M. hisaka, T. Mano and M. shiraiwa: Study on the effect of coal ash on the air-entraining properties of concrete, Transaction of Cement and Concrete, No. 51, pp.132-137, 1997 (in Japanese).
4. M. Hamada: Carbonation of concrete and corrosion of reinforcing steel, Proc. of the Cement Association of Japan, Cement & Concrete, No. 272, pp.2-18, 1969(in Japanese).