Microstructural properties of lithium-added cement mortars subjected to alkali–silica reactions

Little comparative research has been done on the efficiency of lithium additives to reduce the alkali–silica reaction (ASR) expansion. To reduce the ASR effects of reactive aggregate, different mortar bars were obtained by adding lithium additives (Li 2 SO 4 , LiNO 3 , Li 2 CO 3 , LiBr and LiF) to t...

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Published inSadhana (Bangalore) Vol. 43; no. 7; pp. 1 - 10
Main Authors Demir, İlhami, Sevim, Özer, Kalkan, İlker
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 01.07.2018
Springer Nature B.V
Subjects
Additives
Alkali-silica reactions
Bars
Chemical composition
Engineering
Lithium
Lithium fluoride
Morphology
Mortars (material)
Organic chemistry
Silicon dioxide
micro-structure
lithium compounds
Alkali–silica reaction
length change
mortar bar
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Summary:Little comparative research has been done on the efficiency of lithium additives to reduce the alkali–silica reaction (ASR) expansion. To reduce the ASR effects of reactive aggregate, different mortar bars were obtained by adding lithium additives (Li 2 SO 4 , LiNO 3 , Li 2 CO 3 , LiBr and LiF) to the mixing water by the following mass percentages of cement: 0%, 0.5%, 1%, 1.5%, 2%, 2.5% and 3%. The ASR expansions of the mortar bars at 2, 7 and 14 days were identified according to ASTM C 1260-14. The morphology of the specimens subject to the ASR effect was analysed using a scanning electron microscope, and their chemical composition was analysed by electron dispersion spectroscopy. Among all specimens, the lowest level of 14-day ASR expansion was obtained in mortar bars with 3% Li 2 CO 3 additive.
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ISSN:0256-2499
0973-7677
DOI:10.1007/s12046-018-0901-3