Comparative Study on Mortar Containing Fly Ash from Southeast Asia and Japan in Relation to Strength and Durability

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: Comparative Study on Mortar Containing Fly Ash from Southeast Asia and Japan in Relation to Strength and Durability

Author(s): K. Wangwichit, M. Hisada, N. Otsuki and S. Nagataki

Publication: Special Publication

Volume: 178

Issue:

Appears on pages(s): 91-108

Keywords: admixtures; fly ash; temperature; water-binder ratio.

Date: 6/1/1998

Abstract:
In Thailand, the utilization of fly ash as a concrete admixture has been increasing gradually. However, there are no local standards regulating the use of fly ash. Mixing of concrete usually follows standards that contain requirements, especially temperature, that are difficult or sometimes impossible to satisfy. Therefore, this research was carried out to verify the influence of temperature, hot (Thailand) and temperate (Japan) climate, on the strength and durability properties of fly ash mortar. Also, to propose an optimum range of cement replacement percentage and water-binder ratio for each kind of fly ash under Thai (simulated) and Japanese climate conditions. From this investigation, it was found that fly ash exhibited advantages in strength and durability of mortar under high temperature. The strength activity index of both fly ash mortars were satisfied in accordance with ASTM C 618 under all temperatures considered. Furthermore, the optimum range of cement replacement and water-binder ratio became wider with increasing temperature. Thus, fly ash is recommended to be used under high temperature.