Engineering and microstructural properties of self-compacting concrete containing coarse recycled concrete aggregate-Reference-Cited by-同舟云学术

Engineering and microstructural properties of self-compacting concrete containing coarse recycled concrete aggregate

Published:2024-09-01 Issue:18 Volume:76 Page:1059-1072
ISSN:0024-9831
Container-title:Magazine of Concrete Research
language:en
Short-container-title:Magazine of Concrete Research

Author:

Kumar Dinesh¹,Rao Kanta²,Parameshwaran Lakshmy²

Affiliation:

1. PhD student, Academy of Scientific and Innovative Research, Ghaziabad, UP, India; Department of Bridge Engineering and Structures, Council of Scientific and Industrial Research-Central Road Research Institute, New Delhi, India (corresponding author: )

2. Chief Scientist, Department of Bridge Engineering and Structures, Council of Scientific and Industrial Research-Central Road Research Institute, New Delhi, India; Academy of Scientific and Innovative Research, Ghaziabad, UP, India

Abstract

In this paper, the possibility of utilising coarse recycled concrete aggregate (CRCA) obtained from a construction and demolition waste (CDW) plant in Delhi to make 60 MPa self-compacted concrete (SCC) was evaluated. The CRCA was used in as-collected condition and was not processed any further. The aggregate packing (bulk) density (APD) method was adopted to prepare the SCC-CRCA mixture in order to obtain an aggregate mixture exhibiting maximum bulk density/least void content (45%). In addition, SCC was made using aggregate mixtures in which the natural coarse aggregate (NCA) was replaced with CRCA at 0%, 20% and 100% of the total coarse aggregate content by weight. The cement, fly ash, silica fume and water were kept constant for all SCC mixtures. The effects of CRCA on the flow behaviour, mechanical strength, shrinkage characteristics and microstructure properties of SCC mixtures were evaluated. The test results indicated that SCC mixtures made with up to 45% CRCA replacement can be used for structural concrete, which is higher than that recommended in Indian (20%) and international specifications (35%) for traditionally vibrated (conventional) concrete.

Publisher

Emerald

Link

https://www.icevirtuallibrary.com/doi/pdf/10.1680/jmacr.23.00338

Reference31 articles.

1. ACI (American Concrete Institute) (2009) ACI 211.1-91: Standard practice for selecting proportions for normal, heavyweight and mass concrete. ACI, Farmington Hills, MI, USA.

2. ACI (2019) ACI 318-19: Building code requirements for structural concrete. ACI, Farmington Hills, MI, USA.

3. BSI (2004) BS EN 1992-1-1: Eurocode 2: Design of concrete structures-part 1. General rules and rules for buildings. BSI, London, UK.

4. Mechanical and durability properties of concrete using contaminated recycled aggregates

5. DIN (Deutsches Institut für Normung) (2002) DIN 4226-100:2002-02: Aggregates for and concrete mortar – Part 100: Recycled aggregates. DIN, Berlin, Germany.