Mechanical approach in mitigating alkali-silica reaction

C. K. Yi; C. P. Ostertag

doi:10.1016/j.cemconres.2004.02.017

Mechanical approach in mitigating alkali-silica reaction

C. K. Yi, C. P. Ostertag

Research output: Contribution to journal › Article

26 Citations (Scopus)

Abstract

The effect of steel microfibers (SMF) on alkali-silica reaction (ASR) was investigated using two types of reactive aggregates, crushed opal and a Pyrex rod of constant diameter. Cracks are less visible in the SMF mortars compared with the unreinforced mortars. Due to crack growth resistance behavior in SMF mortar specimens, the strength loss is eliminated and the ASR products remained well confined within the ASR site. The expansion and the ASR products were characterized by microprobe analysis and inductive coupled plasma (ICP) spectroscopy. The confinement due to SMF resulted in a higher Na and Si ion concentration of the ASR liquid extracted from the reaction site. The higher concentration reduced the ASR rate and resulted in a lower reactivity of the reactive Pyrex rods in SMF mortars.

Original language	English
Pages (from-to)	67-75
Number of pages	9
Journal	Cement and Concrete Research
Volume	35
Issue number	1
DOIs	https://doi.org/10.1016/j.cemconres.2004.02.017
Publication status	Published - 2005 Jan
Externally published	Yes

Keywords

Alkali-aggregate reaction
Expansion
Fiber reinforcement
Microcracking
Tensile properties

ASJC Scopus subject areas

Building and Construction
Materials Science(all)

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Yi, C. K., & Ostertag, C. P. (2005). Mechanical approach in mitigating alkali-silica reaction. Cement and Concrete Research, 35(1), 67-75. https://doi.org/10.1016/j.cemconres.2004.02.017

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abstract = "The effect of steel microfibers (SMF) on alkali-silica reaction (ASR) was investigated using two types of reactive aggregates, crushed opal and a Pyrex rod of constant diameter. Cracks are less visible in the SMF mortars compared with the unreinforced mortars. Due to crack growth resistance behavior in SMF mortar specimens, the strength loss is eliminated and the ASR products remained well confined within the ASR site. The expansion and the ASR products were characterized by microprobe analysis and inductive coupled plasma (ICP) spectroscopy. The confinement due to SMF resulted in a higher Na and Si ion concentration of the ASR liquid extracted from the reaction site. The higher concentration reduced the ASR rate and resulted in a lower reactivity of the reactive Pyrex rods in SMF mortars.",

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KW - Fiber reinforcement

KW - Microcracking

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