SYMPOSIA PAPER Published: 01 January 1986
STP18465S

Influence of Alkali-Silica Reaction on the Engineering Properties of Concrete

Source

Tests were conducted to quantify the effect of alkali-silica reaction on the properties of concrete. Two reactive aggregates, Beltane opal and an amorphous fused silica, were used to simulate the reaction in the laboratory. At 0.1% expansion, concrete containing 5.2 kg/m3 equivalent sodium oxide showed a loss of 12% compressive strength but 50% tensile strength. The compressive strength was not found to be a good indicator of alkali-silica reaction, but the modulus of rupture test proved to be a sensitive and reliable test to identify the progress of the reaction. Dynamic modulus and pulse velocity also appear to be good indicators of alkali-silica reaction. The tests suggest that fused silica is an ideal reactive aggregate to simulate expansion due to alkali-silica reaction, and that it provides an effective means of determining the deterioration in concrete properties and in evaluating mineral admixtures to control expansion.

Author Information

Swamy, RN
University of Sheffield, Sheffield, England
Al-Asali, MM
University of Sheffield, Sheffield, England
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Details
Developed by Committee: C09
Pages: 69–86
DOI: 10.1520/STP18465S
ISBN-EB: 978-0-8031-4992-2
ISBN-13: 978-0-8031-0498-3