Mechanical approach in mitigating alkali-silica reaction

ChongKu Yi, C. P. Ostertag

Research output: Contribution to journalArticle

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 languageEnglish
Pages (from-to)67-75
Number of pages9
JournalCement and Concrete Research
Volume35
Issue number1
DOIs
Publication statusPublished - 2005 Jan 1
Externally publishedYes

Fingerprint

Alkalies
Silicon Dioxide
Steel
Silica
Mortar
Reaction products
Plasma confinement
Reaction rates
Crack propagation
Spectroscopy
Ions
Cracks
Plasmas
Liquids

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 journalArticle

@article{cd9b5bced57c4a2296fd8b1e8c85c058,
title = "Mechanical approach in mitigating alkali-silica reaction",
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.",
keywords = "Alkali-aggregate reaction, Expansion, Fiber reinforcement, Microcracking, Tensile properties",
author = "ChongKu Yi and Ostertag, {C. P.}",
year = "2005",
month = "1",
day = "1",
doi = "10.1016/j.cemconres.2004.02.017",
language = "English",
volume = "35",
pages = "67--75",
journal = "Cement and Concrete Research",
issn = "0008-8846",
publisher = "Elsevier Limited",
number = "1",

}

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 -