Combating ASR to enable usage of local aggregates in Turkey

This article looks at the use of silica fume to negate the high reactivity of aggregates in Turkey. Reference is made to initial testing for ASR resistance in the early 1970’s, then to local research by KGM in 2013/2014 and further testing in Iceland in 2015. The paper shows that the addition of silica fume in the area of 8% by weight of cement will control the ASR within the specified limits and enable the use of local aggregates, with known reactivity potential, in major concrete construction. Further research is expected to establish levels at which even higher reactivity aggregate may be safely used.

Author: R.C Lewis, E. Bayrak

Section: Science and production

Keywords: Alkali Silica Reaction (ASR), pozzolans, silica fume, expansion values