Work

Effect of scallop shell powder addition on fresh and hardened properties of self-compacting concrete (SCC) based on recycled aggregates

Year: 2025

Type: article

Abstract: This study examines scallop shell powder (SSP) and recycled coarse aggregates (RCA) as alternatives to limestone powder (LS) and natural coarse aggregates (NCA) in self-compacting concrete (SCC). SSP improved viscosity and segregation resistance with minimal slump loss, induced progressive pore coarsening as revealed by MIP, and reduced 90-day compressive strength. RCA reduced wet density, limited workability retention to 45 min, and decreased compressive strength by up to 11 %, while increasing porosity and absorption. Despite this reduction in mechanical performance, the combined use of SSP and RCA promotes waste recovery and resource conservation, thereby contributing to a more sustainable SCC.

Source: Construction and Building Materials

DOI: 10.1016/j.conbuildmat.2025.143660

Authors: Meriem Guessoum, Bouha El Moustapha, Fouzia Khadraoui, Daniel Chateigner, Stéphanie Gascoin, Walid Maherzi

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

Funders: European Commission, European Synchrotron Radiation Facility, Horizon 2020 Framework Programme