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Published in: Journal of Material Cycles and Waste Management 2/2017

15-04-2016 | ORIGINAL ARTICLE

Quality improvement of recycled aggregates using the acid treatment method and the strength characteristics of the resulting mortar

Authors: Ha-Seog Kim, Byoungil Kim, Kee-Seog Kim, Jin-Man Kim

Published in: Journal of Material Cycles and Waste Management | Issue 2/2017

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Abstract

This study was conducted with the aim to chemically remove the cement paste attached to the aggregate surface using acidic substances. Sulfuric and hydrochloric acids were used as the acidic substances, and after analyzing the quality characteristics of the aggregates following the acid treatment, a mortar test was performed using the aggregates. The results showed that the acid-treated recycled aggregates were superior to the original aggregates and the recycled aggregates that were manufactured using natural water in terms of density, absorption ratio and solid volume percentage. Based on this, it was determined that acid treatment was effective in improving the quality of recycled fine aggregates. In addition, the results of reviewing the strength characteristics of the mortar obtained using the acid-treated aggregates showed that the residue substances remaining in the recycled fine aggregates after reacting with the cement paste had a negative impact on the concrete strength. Based on this, it was determined that in case of improving the quality of recycled aggregates by acid treatment, there needs to be strict management of the products of the reaction with the acid in order for the aggregates to be used in structural construction.

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Metadata
Title
Quality improvement of recycled aggregates using the acid treatment method and the strength characteristics of the resulting mortar
Authors
Ha-Seog Kim
Byoungil Kim
Kee-Seog Kim
Jin-Man Kim
Publication date
15-04-2016
Publisher
Springer Japan
Published in
Journal of Material Cycles and Waste Management / Issue 2/2017
Print ISSN: 1438-4957
Electronic ISSN: 1611-8227
DOI
https://doi.org/10.1007/s10163-016-0497-9

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