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 | |
| Publication status | Published - 2005 Jan 1 |
| Externally published | Yes |
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Keywords
- Alkali-aggregate reaction
- Expansion
- Fiber reinforcement
- Microcracking
- Tensile properties
ASJC Scopus subject areas
- Industrial and Manufacturing Engineering
- Ceramics and Composites
Cite this
Mechanical approach in mitigating alkali-silica reaction. / Yi, ChongKu; Ostertag, C. P.
In: Cement and Concrete Research, Vol. 35, No. 1, 01.01.2005, p. 67-75.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Mechanical approach in mitigating alkali-silica reaction
AU - Yi, ChongKu
AU - Ostertag, C. P.
PY - 2005/1/1
Y1 - 2005/1/1
N2 - 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.
AB - 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.
KW - Alkali-aggregate reaction
KW - Expansion
KW - Fiber reinforcement
KW - Microcracking
KW - Tensile properties
UR - http://www.scopus.com/inward/record.url?scp=12244270647&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=12244270647&partnerID=8YFLogxK
U2 - 10.1016/j.cemconres.2004.02.017
DO - 10.1016/j.cemconres.2004.02.017
M3 - Article
VL - 35
SP - 67
EP - 75
JO - Cement and Concrete Research
JF - Cement and Concrete Research
SN - 0008-8846
IS - 1
ER -