[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.14190/JRCR.2021.9.2.135

The Effect of Recycled Aggregate Produced by the New Crushing Device with Multi-Turn Wings and Guide Plate on the Mechanical Properties and Carbonation Resistance of Concrete

Cho, Sung-Kwang (G-Bon IP LAW Firm)
Kim, Gyu-Yong (Department of Architectural Engineering, Chungnam National University)
Eu, Ha-Min (Department of Architectural Engineering, Chungnam National University)
Kim, Yong-Rae (Sin Hwa Environment Development)
Lee, Chul-Min (Dong Yang RD)

Publication Information

Journal of the Korean Recycled Construction Resources Institute / v.9, no.2, 2021 , pp. 135-142 More about this Journal

Abstract

In this work, multi-turn wings and guide plates are installed on recycled aggregate crushing devices to improve existing low recycled aggregate quality. Simulation analysis to evaluate the crushing efficiency of the new device shows enhanced crushing efficiency since the installation of guide plates shreds most of the inputs inside the crushing drum, and the multi-turn wings and guide plates induce rebound and circulation of the aggregate. Through this, the new device was found to be more economical and efficient than the existing recycled aggregate crushing device. Also, the amount of cement paste and mortar attached to the surface of the aggregate was smaller than that of the existing recycled aggregate, and it was found that the mechanical properties and elastic modulus deterioration were reduced. However, the carbonation resistance of concrete was not improved to the level of natural aggregates due to the remaining tiny cement paste and mortar on the surface of the new recycled aggregate. Therefore, it is deemed necessary to further research and experiment such as device improvement or binder development to reduce durability degradation of concrete mixed with new recycled aggregate.

Keywords

Multi-turn wing; Guide plate; Recycled aggregate; Mechanical properties; Carbonation resistance;

Citations & Related Records

Reference

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