Structural Performance of Reinforced RCA Concrete Beams Made by a Modified EMV Method

Sustainability

Hwalwoong Lee¹  Sungchul Yang² 

[1] Construction Safety Division, Korea Infrastructure Safety Corporation, 315 Goyangdae-ro Ilsanseo-gu, Goyang 10223, Korea;School of Architectural Engineering, Hongik University, 2639 Sejong-ro Jochiwon, Sejong 30016, Korea;

关键词: recycled concrete aggregate;    elastic modulus;    equivalent mortar volume;    reinforced concrete;    flexural strength;   

DOI  :  10.3390/su9010131

来源: DOAJ

【 摘 要 】

This study aims to show the effect of a modified equivalent mortar volume (EMV) method on the flexural performance of recycled concrete aggregate (RCA). To verify this, an experimental study was carried out firstly by testing fresh and hardened material properties of RCA concrete specimens made by two different mixture design methods, i.e., the modified EMV method and the conventional American Concrete Institute (ACI) method. The flexural performance of five reinforced recycled concrete (RRC) beams mixed with different mixture designs was then investigated. Test results confirmed that the elastic moduli of the RCA concrete specimens made using the modified EMV method are greater than those of the conventional ACI mixture, while the drying shrinkage tended to decrease. The ultimate strengths of RRC beams mixed with the modified EMV method are as much as five percent greater than that achieved with the conventional ACI mixture.

【 授权许可】

Unknown