Journal
CEMENT AND CONCRETE RESEARCH
Volume 58, Issue -, Pages 103-111Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.cemconres.2014.01.015
Keywords
Glass cullet; Pozzolanic reactivity; Degree of hydration; Reaction; Elevated temperature
Funding
- National Science Foundation [CMMI-1032636]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1032636] Funding Source: National Science Foundation
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Glass cullet has been considered for use in concrete as a fine aggregate or a supplementary cementitious material (SCM). Glass reaction kinetics depends on both temperature and glass composition. Uniform composition, amorphous nature, and high silica content of glass make it ideal for studying effects of glass type on reactivity at different temperatures. In this study, the pozzolanicity of clear and green glass crushed smaller than 25 pm at three different temperatures (i.e. 10 degrees C, 23 degrees C, and 50 degrees C) was measured using isothermal calorimetry, chemical shrinkage, and thermogravimetric analysis. Additionally, mortar compressive strength and water absorption of samples at different temperatures and ages have been used to relate reaction degree to performance. Results indicate that elevated temperatures cause glass powder to exhibit significant pozzolanic reaction, even at early ages. Moreover, glass composition was seen to have a large impact on reactivity. In this study, green glass showed higher reactivity than clear glass. (C) 2014 Elsevier Ltd. All rights reserved.
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