When utilized in concrete (about half of current production of aggregates), compositional aspects of aggregate source rocks are of utmost importance specifically due to unwanted deleterious reactions of certain mineral phases in highly alkaline environments (e.g., Fookes 1980).
The quality level of the recycled material used significantly impacts the concrete created with recycled coarse aggregate (RCA). The concrete cylinders that were analyzed and crushed during prior laboratory research studies are used to generate the recycled aggregate utilized in this study.
Upon analysis of the physical–chemical and mechanical properties, a replacement ratio of RAs of 50% was suggested, considering two factors: (1) the highest acceptable decrease in aggregate properties; and (2) the higher contribution to the environment, which is also accepted by the EN-12620 standard.
This study provides a comprehensive review on recycled aggregate (RA) and recycled aggregate concrete (RAC) regarding their history, recycling, reuse and manufacture process, inherent defects (e.g. existing of additional interfacial transition zones in RAC), and materials properties.
By collecting the used concrete and breaking it up, recycled concrete aggregate (RCA) is created (Fig. 1 ). This paper focuses on coarse RCA which is the coarse aggregate from the original concrete that is created after the mortar is separated from the rock which is reused.
The main objectives of the experimental program were to (i) investigate variability of recycled aggregate properties and their impact on concrete production and (ii) evaluate properties of concrete prepared with 100 % recycled aggregate.
In this paper, a comprehensive literature review was conducted on the utilization of recycled concrete aggregate (RCA), which is the dominant construction and demolition waste material, in base and subbase layers and its comparison with natural aggregate (NA).
Demands for a more sustainable concrete production with reduced waste streams and lower carbon footprint has introduced new solutions that transform waste streams into recyclable raw materials and bring them back into the value chain. Here, recycled aggregates with carbonation potential from a dry-washing technology for …
In recent years, scholars around the world have worked on improving recycle aggregates in concrete and broadening the scope of applications of recycled concrete.
Application of Aggregates from Construction and Demolition Wastes in Concrete: Review. by. Hua Luo. 1, José Aguiar. 2, Xiaoqi Wan. 1, Yinggu Wang. 1, Sandra Cunha. 2 and. Zhiyou Jia. 2,* 1. GCM—Joint Laboratory of Green Construction Materials, Department of Civil Engineering, Nanchang Institute of Technology, Nanchang 330013, …
