| 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. |
| Authors |
Caleb E. C. Pachel , Jennifer E. Tanner 
|
| Journal Info |
ASM International | Journal of Testing and Evaluation , vol: 51
, iss: 5
, pages: 2715 - 2729
|
| Publication Date |
9/1/2023 |
| ISSN |
0090-3973 |
Type |
article |
| Open Access |
closed
|
| DOI |
https://doi.org/10.1520/jte20220275 |
| Keywords |
Alkali-Activated Materials (Score: 0.524108)
|
