Composition effects on microstructure and mechanical performance of lightweight cementitious mortars incorporating recycled glass powder

IF 8.2 2区工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY

Developments in the Built Environment Pub Date : 2026-04-01 Epub Date: 2026-04-15 DOI:10.1016/j.dibe.2026.100922

Yara Nasr , Makram El Bachawati , Ameur El Amine Hamami , Henri El Zakhem , Rafik Belarbi

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引用次数: 0

Abstract

The construction sector must reduce its environmental footprint by adopting circular, low-carbon materials that preserve mechanical performance. This study develops lightweight aerated mortars incorporating recycled waste glass powder (RWGP, 0–50 wt%) and hydrogen peroxide (H₂O₂, 0–7.5 wt%) as a chemical foaming agent. Sixteen formulations were produced through a factorial design and evaluated for bulk density, porosity, and compressive strength, supported by XRD, TGA, and X-ray micro-computed tomography. The interwoven mechanisms of RWGP-driven pozzolanic densification and H₂O₂-induced pore formation were quantified as RWGP promotes portlandite consumption and secondary C–S–H formation, while controlled aeration generated a uniform pore network. The mortars exhibited densities from approximately 2080 to 1820 kg/m³ and compressive strengths between 16 and 62 MPa, with statistical analysis confirming strong density–solid fraction and strength–porosity correlations. M7.5-50 reduced the roof areal load by ∼12% relative to conventional mortar while remaining compliant with the Eurocodes, demonstrating the potential of the mortars for multifunctional roof-layer applications.

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成分对再生玻璃粉轻质胶凝砂浆微观结构和力学性能的影响

建筑行业必须通过采用循环低碳材料来减少对环境的影响，以保持机械性能。本研究采用再生废玻璃粉（RWGP, 0-50 wt%）和过氧化氢（H2O2, 0-7.5 wt%）作为化学发泡剂，开发轻质充气砂浆。通过析因设计生产了16种配方，并通过XRD， TGA和x射线微计算机断层扫描评估了体积密度，孔隙率和抗压强度。RWGP驱动的火山灰致密化与h2o2诱导的孔隙形成相互交织的机制被量化为RWGP促进了波特兰铁矿的消耗和次生C-S-H的形成，而控制的曝气形成了均匀的孔隙网络。砂浆的密度约为2080 ~ 1820 kg/m3，抗压强度在16 ~ 62 MPa之间，统计分析证实了较强的密度-固相分数和强度-孔隙度相关性。与传统砂浆相比，M7.5-50减少了约12%的屋顶面载荷，同时仍符合欧洲规范，证明了该砂浆在多功能屋顶层应用中的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Developments in the Built Environment Multiple-

CiteScore

7.40

自引率

1.20%

发文量

审稿时长

22 days

期刊介绍： Developments in the Built Environment (DIBE) is a recently established peer-reviewed gold open access journal, ensuring that all accepted articles are permanently and freely accessible. Focused on civil engineering and the built environment, DIBE publishes original papers and short communications. Encompassing topics such as construction materials and building sustainability, the journal adopts a holistic approach with the aim of benefiting the community.