Next Article in Journal
The Synthesis Methodology and Characterization of Nanogold-Coated Fe3O4 Magnetic Nanoparticles
Next Article in Special Issue
Recycled Untreated Rubber Waste for Controlling the Alkali–Silica Reaction in Concrete
Previous Article in Journal
Experimental Study and Mechanism Analysis of Preparation of α-Calcium Sulfate Hemihydrate from FGD Gypsum with Dynamic Method
Previous Article in Special Issue
Contribution to Understanding of Synergy between Red Mud and Common Supplementary Cementitious Materials
 
 
Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
Journals
Materials
Volume 15
Issue 9
10.3390/ma15093384
materials-logo
Submit to this Journal Review for this Journal Propose a Special Issue
► Article Menu

Article Menu

share Share announcement Help format_quote Cite question_answer Discuss in SciProfiles
first_page
settings
Order Article Reprints
Font Type:
Arial Georgia Verdana
Font Size:
Aa Aa Aa
Line Spacing:
Column Width:
Background:
Article

Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolution

by
Zengfeng Zhao
1,
Jianzhuang Xiao
1,*,
Denis Damidot
2,3,
Sébastien Rémond
4,
David Bulteel
2,3 and
Luc Courard
5
1
Department of Structural Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
2
Univ. Lille, Institute Mines-Télécom, Univ. Artois, Junia, ULR 4515—LGCgE—Laboratoire de Génie Civil et géo-Environnement, F-59000 Lille, France
3
IMT Nord Europe, Institut Mines-Télécom, Centre for Materials and Processes, F-59000 Lille, France
4
University Orléans, University Tours, INSA CVL, LaMé, EA 7494, F-45100 Orléans, France
5
Building Materials, Urban and Environmental Engineering, University of Liège, 4000 Liege, Belgium
*
Author to whom correspondence should be addressed.
Materials 2022, 15(9), 3384; https://doi.org/10.3390/ma15093384
Submission received: 28 March 2022 / Revised: 29 April 2022 / Accepted: 4 May 2022 / Published: 9 May 2022
(This article belongs to the Special Issue Utilisation of Recycled Materials and By-Products in Concrete)
Browse Figures
Versions Notes

Abstract

Adherent hardened cement paste attached to recycled concrete aggregates (RCA) generally presents a higher porosity than natural aggregates, which induces a lower porosity in the properties of RCA. The characterization of the adherent hardened cement paste content (HCPC) in the fine RCA would promote better applications of RCA in concrete, but the determination of HCPC in fine RCA is not well established. A simple method based on salicylic acid dissolution was specifically developed to quantify the HCPC in RCA, especially for RCA containing limestone aggregates. The results demonstrated that the soluble fraction in salicylic acid (SFSA) was equal to the HCPC for white cement and slightly lower for grey Portland cement, which was also confirmed by a theoretical approach using modelling the hydration of cement paste with the chemical equations and the stoichiometric ratios. The physical and mechanical properties of RCA (e.g., water absorption) were strongly correlated to the SFSA. For industrial RCA, SFSA did not give the exact value of HCPC, but it was sufficient to correlate HCPC with the other properties of RCA. The water absorption could be estimated with good accuracy for very fine RCA (laboratory-manufactured RCA or industrial RCA) by extrapolating the relationship between water absorption and HCPC, which is very important for concrete formulation.
Keywords: hardened cement paste content (HCPC); recycled concrete aggregates (RCA); salicylic acid; water absorption; X-ray Diffraction; density hardened cement paste content (HCPC); recycled concrete aggregates (RCA); salicylic acid; water absorption; X-ray Diffraction; density

Share and Cite

MDPI and ACS Style

Zhao, Z.; Xiao, J.; Damidot, D.; Rémond, S.; Bulteel, D.; Courard, L. Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolution. Materials 2022, 15, 3384. https://doi.org/10.3390/ma15093384

AMA Style

Zhao Z, Xiao J, Damidot D, Rémond S, Bulteel D, Courard L. Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolution. Materials. 2022; 15(9):3384. https://doi.org/10.3390/ma15093384

Chicago/Turabian Style

Zhao, Zengfeng, Jianzhuang Xiao, Denis Damidot, Sébastien Rémond, David Bulteel, and Luc Courard. 2022. "Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolution" Materials 15, no. 9: 3384. https://doi.org/10.3390/ma15093384

APA Style

Zhao, Z., Xiao, J., Damidot, D., Rémond, S., Bulteel, D., & Courard, L. (2022). Quantification of the Hardened Cement Paste Content in Fine Recycled Concrete Aggregates by Means of Salicylic Acid Dissolution. Materials, 15(9), 3384. https://doi.org/10.3390/ma15093384

Note that from the first issue of 2016, this journal uses article numbers instead of page numbers. See further details here.

Article Metrics

Back to TopTop