Efficiency of fly ash in concrete with age

Journal Article · Fri Mar 01 04:00:00 EST 1996 · Cement and Concrete Research

DOI:https://doi.org/10.1016/0008-8846(96)00011-7· OSTI ID:228003

Babu, K G; Rao, G S.N. ^[1]

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1. Indian Inst. of Technology, Madras (India)

Research efforts over the past many decades towards an efficient utilization of fly ash in concrete do not seem to have led to a quantitative understanding of the efficiency of fly ash as a mineral admixture, particularly because of the vast variation in the grades of concrete and the different levels of replacements adopted. This paper is an effort directed towards a specific understanding of the efficiency of fly ash in concrete, considering the strength to water cement ratio relations, age and percentage of replacement. The ``overall cementing efficiency`` (k) of fly ash was established through a ``general efficiency factor`` (k{sub e}), dependent on the age and a ``percentage efficiency factor`` (k{sub p}), dependent on the replacement percentage. This information will allow designers to evaluate the strength of well designed fly ash concretes at any age and at the different percentages of replacement.

• OSTI ID: 228003
• Journal Information: Cement and Concrete Research, Journal Name: Cement and Concrete Research Journal Issue: 3 Vol. 26; ISSN 0008-8846; ISSN CCNRAI
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
36 MATERIALS SCIENCE
AGE DEPENDENCE
CONCRETES
FLY ASH
MECHANICAL PROPERTIES
WASTE PRODUCT UTILIZATION