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http://dx.doi.org/10.14190/JRCR.2022.10.1.23

Investigation on Fire Resistance of High-Performance Cement Motar with Recycled Fine Aggregate Mixed by Two-Stage Mixing Approach  

Park, Sung-Hwan (Department of Architectural and Fire Protection Engineering, Pukyong National University)
Choi, Jun-Ho (Department of Fire Protection Engineering, Pukyong National University)
Lee, Chi Young (Department of Fire Protection Engineering, Pukyong National University)
Koo, Min-Sung (Department of Fire Protection Engineering, Pukyong National University)
Chung, Chul-Woo (Department of Architectural Engineering, Pukyong National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.1, 2022 , pp. 23-29 More about this Journal
Abstract
This study was conducted to confirm the applicability of recycled aggregates as aggregates for structural concrete as a way to respond to the shortage of natural aggregates. The two-stage mixing approach developed by Tam et al. is known to be a method that can improve the mechanical performance of recycled aggregate concrete without the installation of new additional facilities. In this work, modified version of two stage mixing approach, which was used in our earlier work, was introduced to prepare mortar specimens with recycled fine aggregate, and the compressive strength and fire resistance were compared to mortar mixed with normal mixing approach. According to the experimental results from mortar with recycled fine aggregate, the use of two-stage mixing approach was found to be more effective than normal mixing approach for compressive strength development. In addition, the residual strengths of the mortar with two-stage mixing approach was higher than mortar made of normal mixing approach after exposure to 600 and 900 ℃. It is possible to manufacture high-performance cement composites with recycled fine aggregates through the active use of the two-stage mixing approach.
Keywords
Two-stage mixing approach; Recycled fine aggregate; Compressive strength; Fire resistance;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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