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The use of fly ash in concretes subject to heat

✍ Scribed by M.Yu. Leshchinsky; V.A. Velichko; A.M. Leshchinsky

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
867 KB
Volume
21
Category
Article
ISSN
0008-8846

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✦ Synopsis

The influence of fly ash on the basic characteristics of lightweight and ordinary concretes subject to heat treatment has been studied. The use of fly ash increases the strength of lightweight concretes, reduces cement consumption by 15 to 25%, and permits a decrease in concrete mean density (by 100 kg/m 3 on the average) and heat conduction. In ordinary concretes, the reduction of cement consumption is 40 to 70 kg/m 3, while increasing absolute and relative strength values after heat treatment. The latter is, on the average, 85% from the concrete strength at the age of 28 days. The role of fly ash as a polyfunctional ingredient which performs the functions of aggregate, active mineral admixture, plasticizer, and microffller is also demonstrated.

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