Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior
Joint Authors
Younis, Khaleel H.
Amin, Abdulfattah A.
Ahmed, Hemin G.
Maruf, Shelan M.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-17, 17 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-12-17
Country of Publication
Egypt
No. of Pages
17
Abstract EN
This experimental research investigates the effect of utilizing metakaolin (MK) on the behavior of recycled aggregate concrete (RAC).
The RAC incorporates recycled coarse aggregate (RCA) originated from crushing construction and demolition waste.
The investigated parameters were RCA and MK contents.
Tests of workability and mechanical properties such as compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity were conducted to evaluate the influence of MK on workability and mechanical behavior of RAC.
In total, 19 mixes were prepared.
These mixes are divided into four groups.
Group zero (G0) includes a reference mix containing normal coarse aggregate (NCA) and 3 mixes made with 35%, 70%, and 100% of RCA.
Each one of the other three groups (G1, G2, and G3) was made with one content of the three contents of RCA, and each group includes five mixes made with the contents of 4%, 8%, 12%, 16%, and 20% of MK.
Empirical models among the mechanical properties of the RAC mixes were developed and compared with models of standard codes of practice such as ACI 318, BS 8110, and Eurocode 2.
It was found that MK reduces the workability of the RAC mixes.
Nonetheless, the outcomes reveal that MK can improve the compressive, splitting tensile, and flexural strengths and the elastic modulus of RAC.
This strength improvement enhances as the content of MK increases.
The proposed models for the mechanical properties of RAC made with MK showed good correlations.
The developed model for modulus of elasticity is quite close to the Eurocode 2 model, whereas the models of ACI 318 and BS 8110 underestimate the values of the modulus of elasticity.
American Psychological Association (APA)
Younis, Khaleel H.& Amin, Abdulfattah A.& Ahmed, Hemin G.& Maruf, Shelan M.. 2020. Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior. Advances in Materials Science and Engineering،Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1129407
Modern Language Association (MLA)
Younis, Khaleel H.…[et al.]. Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior. Advances in Materials Science and Engineering No. 2020 (2020), pp.1-17.
https://search.emarefa.net/detail/BIM-1129407
American Medical Association (AMA)
Younis, Khaleel H.& Amin, Abdulfattah A.& Ahmed, Hemin G.& Maruf, Shelan M.. Recycled Aggregate Concrete including Various Contents of Metakaolin: Mechanical Behavior. Advances in Materials Science and Engineering. 2020. Vol. 2020, no. 2020, pp.1-17.
https://search.emarefa.net/detail/BIM-1129407
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1129407