Document Type

Article

Source of Publication

Cleaner Waste Systems

Publication Date

12-1-2025

Abstract

Cement production significantly contributes to climate change due to its high carbon emissions and resource-intensive processes. With traditional cement alternatives dwindling, exploring underutilized resources is crucial. This study investigates gabbro stone powder (GSP), an abundant byproduct in the United Arab Emirates (UAE), as a partial cement replacement in blended pastes. The characteristics of GSP were determined using standardized procedures. Then, it was incorporated into mixes at 0 %, 5 %, 10 %, and 20 % cement replacement levels with water-to-binder (w/b) ratios of 0.30, 0.35, and 0.40. Characterization revealed GSP as a siliceous-aluminous material with limited hydraulic activity. Experimental results showed that flowability depended on the w/b ratio rather than GSP content, while setting times increased with GSP inclusion. Compressive strength improved at 5–10 % GSP content for w/b ratios of 0.30–0.35, albeit emitting less heat, with consistent behavior across different ages. Bulk electrical resistivity exhibited similar early-age trends but decreased at later ages for all replacement levels with increasing GSP content. Meanwhile, water absorption and porosity mirrored strength trends, while density remained marginally affected by GSP content. Microstructural analysis revealed enhanced hydration product formation and a denser matrix in higher-strength mixes. This study highlights the potential of utilizing local byproducts like GSP to produce low-carbon concrete, aligning with sustainable practices and reducing environmental impact.

ISSN

2772-9125

Publisher

Elsevier BV

Volume

12

Disciplines

Life Sciences

Keywords

Cement replacement, Compressive strength, Gabbro stone powder, Microstructural analysis, Sustainable construction

Scopus ID

105010909356

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

Indexed in Scopus

yes

Open Access

yes

Open Access Type

Gold: This publication is openly available in an open access journal/series

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