Abstract
The suppression of ASR expansion hazards of glass concrete has always been a key and hot issue in the research of glass concrete. According to the ASTM C1260-14 fast mortar rod method, glass sand and glass powder act as fine aggregate and auxiliary cementing material, respectively. The changes in expansion rate with different amounts of glass sand content and different particle sizes of glass powder in mortar rods were compared, and the effects of glass sand content and the glass powder particle size on the expansion of ASR were analyzed. SEM was used to compare and analyze the microstructure of mortar rods to explore the mechanism of ASR expansion of glass concrete, and the results showed that the addition of glass powder had a certain inhibitory effect on ASR expansion. The larger the particle size of glass powder was, the better the inhibition effect on ASR expansion and the longer its duration. Compared with the three groups of experiments of 0–13 μm, 13–38 μm, and 38–75 μm, it was found that the influence of the glass powder particle size on the expansion of ASR was weaker than that of dosage. The inhibitory effect of glass powder on ASR expansion is related to the fact that glass powder is more involved in pozzolanic reaction in the early hydration process.
Highlights
Zongwei Han and Yang ZhaoWith the continuous development of industrialization and urbanization in various countries, glass is widely used in various fields of production and life but is followed by a sharp increase in waste glass
The research on waste glass concrete, on both national and international levels, is mainly divided into the following parts: In the first group of studies, the ground glass is used as concrete fine aggregate [1,2,3,4,5], while in the second, it is used as inert filling material in concrete [6,7]; the third theme of research is to produce cement as cement clinker, and in the fourth, cement is partially replaced as an auxiliary cementitious material [8,9,10]
Further study found that the expansion rate of concrete mixed with glass powder decreased significantly
Summary
With the continuous development of industrialization and urbanization in various countries, glass is widely used in various fields of production and life but is followed by a sharp increase in waste glass. The research on waste glass concrete, on both national and international levels, is mainly divided into the following parts: In the first group of studies, the ground glass is used as concrete fine aggregate [1,2,3,4,5], while in the second, it is used as inert filling material in concrete [6,7]; the third theme of research is to produce cement as cement clinker, and in the fourth, cement is partially replaced as an auxiliary cementitious material [8,9,10].
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