Assessment of ASR expansions using an ultra-accelerated test

Author: Cao, J., Gowripalan, N., Sirivivatnanon, V., South, W.
Type: Conference Paper, Concrete 2019, Sydney, Australia.
Date: 2019

Keywords: Alkali Silica Reaction (ASR); Expansion; Accelerated Tests; Autoclaving

Abstract: Alkali-silica reaction (ASR) is a potential source of long-term deterioration for reinforced concrete structures, particularly after 15 to 25 years of construction. Currently, an ultra-accelerated autoclave test, is being developed at the University of Technology Sydney, to study the effect of ASR expansion on plain, reinforced and prestressed concrete elements. This paper discusses the results obtained on plain concrete prisms under ultra-accelerated conditions in an autoclave. For autoclave tests, similar to CPT tests, boosting of specimens is required and up to 5% of alkali boosting (by mass of cement), are reported in this paper. For comparative ASR expansion studies, 3 cycles of autoclaving at a maximum temperature of 130ºC was used.