Work

Durability of cement mortars containing fine demolition wastes as supplementary cementitious materials

Year: 2025

Type: article

Abstract: The study addresses the durability performance of cementitious mortars containing 20 % recycled powders derived from construction and demolition waste , specifically concrete screenings, mixed screenings, and slurries from the washing of recycled aggregates. Uncalcined and thermally activated at 500°C, the powders were evaluated for their potential as supplementary cementitious materials . Key durability parameters analyzed include freeze-thaw resistance, fire resistance and sulfuric acid corrosion resistance , along with capillary absorption and drying shrinkage . Analysis of Variance (ANOVA) was used to assess the influences of various factors on the durability properties. The results demonstrate that the type of waste has a significant impact on the durability of mortars, with ceramic-containing specimens exhibiting superior performance in comparison to those comprising pure concrete powders. Capillary absorption emerged as an important factor for resistance to extreme temperatures. Furthermore, the findings of this study demonstrate that thermal activation of waste powders does not enhance the durability parameters, and that drying shrinkage shows no significant impact on durability. This study fills a knowledge gap in the durability of cementitious materials incorporating recycled powders and highlights the potential of ceramic-containing powders in sustainable cement production .

Source: Construction and Building Materials

DOI: 10.1016/j.conbuildmat.2025.141316

Authors: Anna Tokareva, Danièle Waldmann

Institutions: University of Luxembourg, Technische Universität Darmstadt

Language: English

Topic: Recycled Aggregate Concrete Performance

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDG: Responsible consumption and production

Open Access status: hybrid

Estimated APC paid: $4,540