Evaluation of Mechanical Characteristics of Cement Mortar with Fine Recycled Concrete Aggregates (FRCA)

Rebeca Martínez-García, María Isabel Sánchez de Rojas, Julia Mª. Morán-del Pozo, Fernando J. Fraile-Fernández and Andrés Juan-Valdés
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Rebeca Martínez-García: Department of Mining Technology, Topography and Structures, University of León, Campus de Vegazana s/n, 24071 León, Spain
María Isabel Sánchez de Rojas: Eduardo Torroja Institute for Construction Science, UEX-CSIC Partnering Unit, C/ Serrano Galvache, 28033 Madrid, Spain
Julia Mª. Morán-del Pozo: Department of Agricultural Engineering and Sciences, University of León, 24071 Léon, Spain
Fernando J. Fraile-Fernández: Department of Mining Technology, Topography and Structures, University of León, Campus de Vegazana s/n, 24071 León, Spain
Andrés Juan-Valdés: Department of Agricultural Engineering and Sciences, University of León, 24071 Léon, Spain

Sustainability, 2021, vol. 13, issue 1, 1-23

Abstract: One of the growing demands in concrete manufacture is the availability of natural fine aggregates, which account for 35% to 45% of the total concrete. An alternative method of disposal of fine recycled concrete aggregates (FRCA) generated from demolition and construction waste (C&DW) is their usage in mortar and the development of recycled mortar. The main aim of this research work is to evaluate the viability of incorporating FRCA from urban C&DW for the manufacture of cement-based mortars. Simple processing techniques like washing and sieving are adopted to improve the FRCA quality. Physical and chemical characterization of ingredients is carried out. In total four mixes of 1:3 (cement: sand) mortar with partial replacement of normalized sand with FRCA (0%, 25%, 50%, and 100%) are evaluated for mechanical properties. Water to cement ratio for all four mortar mixes are determined by fixed consistency. Mechanical and physical properties like density, compressive strength, and flexural strength are studied for various curing periods, and the result is that the optimum usage of FRCA is 25% based on a 90-day curing period.

Keywords: fine recycled concrete aggregate; construction and demolition waste; recycled mortar; physical and chemical characterization; mechanical properties (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
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