Journal Published Online: 26 April 2023
Volume 51, Issue 5

Alkali-Silica Reaction and Its Effects on the Splitting Tensile Strength and Direct Compressive Strength of Mortar Bars

CODEN: JTEVAB

Abstract

The alkali-silica reaction (ASR) is a type of alkali-aggregate reaction that is associated with the chemical interaction of siliceous aggregate and the alkaline pore solution of concrete. The reaction causes a gel to form that readily absorbs water and can cause expansion that damages concrete in a cyclical manner. This research aims to determine the relationship between the expansion due to ASR and the strength of concrete. Despite the inherent issues pertaining to the accuracy and precision of the accelerated mortar bar test (AMBT), its relative quickness makes it one of the most popular ASR tests. Conventional AMBTs were used to evaluate the reactivity of 12 aggregates and compared to a suite of control specimens to benchmark expansions and strengths. The aggregates evaluated were moderately reactive, highly reactive, or very highly reactive. Based on a total of 1,872 tests and regression analyses, both the splitting tensile and compressive strengths of the exposed mortar bars showed marked decreases when compared to the control mortar bars. The splitting tensile strength was affected more adversely than the compressive strength.

Author Information

Pachel, Caleb E. C.
Martin/Martin Wyoming, Cheyenne, WY, USA
Tanner, Jennifer Eisenhauer
Department of Civil and Architectural Engineering, University of Wyoming, Laramie, WY, USA
Pages: 15
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20220275
ISSN: 0090-3973
DOI: 10.1520/JTE20220275