Work

Performance of mortars with calcined construction waste powder and natural or artificial aggregates

Year: 2025

Type: article

Abstract: The circularity in industrial processes is fundamental to different waste type applications. On this context, this study uses mixed construction and demolition waste (CDW) powders, calcined at 800 ºC, to replace Portland cement at 25 to 45% levels in coating mortars with natural and artificial fine aggregates (crushed sand). Mortars were produced with 1:4, 1:5, and 1:6 ratios (cement: fine aggregate), assessing fresh-state properties and hardened-state properties. Environmental performance was evaluated considering CO2 emissions and binder consumption. Mortars containing 25% recycled powders showed similar mechanical performance to mortars with reference Portland cement (FPC). Mixtures with artificial aggregates incorporated less air, reducing porosity and water absorption, improving mechanical performance by up to five times compared to natural aggregates. The CDW powder use reduced mortars carbon emissions up to 30%, while the artificial aggregates presence reduced emissions up to 6%. So, this study demonstrates the mixed CDW powders potential as a replacement for cement and the artificial aggregate potential to improve aspects related to circular economy and CO2 emissions reduction.

Source: Ambiente Construído

DOI: 10.1590/s1678-86212025000100910

Authors: Melissa Proença, Dayana Ruth Bola Oliveira, Kathleen Dall Bello de Souza Risson, Edna Possan, Marcelo Henrique Farias de Medeiros

Institutions: Instituto Federal do Paraná, Universidade Federal da Integração Latino-Americana, Universidade Federal do Paraná

Language: English

Topic: Recycled Aggregate Concrete Performance

Subfield: Building and Construction

Field: Engineering

Domain: Physical Sciences

SDGs: Responsible consumption and production, Climate action, Industry, innovation and infrastructure

Open Access status: diamond

OpenAlex ID: W4412938980

FWCI:

Cites: 48

Cited by:

Related to: 10