Scholarlink

<p>This study focuses on incorporating dune sand (DS) and recycled sand (RS) obtained from construction waste, into mortar production. The valorization of these materials meets the sustainable development principles by reducing waste and conserving natural resources. The extremely fine granular composition of dune sand limits its use in mortar production. In this work, the dune sand granulometry was corrected using two percentages of recycled sand: 40% and 50%. The results indicated that incorporating recycled sand optimized the physical characteristics of the resulting sand mixture and the mortar. An improvement in mechanical and rheological characteristics was also observed. Indeed, the maximum increase in compressive and flexural strengths was obtained by the mortar containing 60% DS and 40% RS, compared to the control mortar (100% dune sand) with 56.25% and 63.15% respectively. For shrinkage, the best result was observed for the same concrete with a reduction of 57.82%. Weight loss was higher for mortars prepared by mixing recycled sand with dune sand, compared to the control mortar.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Valorization of recycled sand from demolition concrete waste for dune sand mortar in arid climates : mechanical properties and shrinkage

  • 期刊论文

  • 发表日期：

    2026年6月18日

查看全文
  • Samir Kennouche,
  • Allaoua Belferrag,
  • Djamel Boutaoutaou

摘要

This study focuses on incorporating dune sand (DS) and recycled sand (RS) obtained from construction waste, into mortar production. The valorization of these materials meets the sustainable development principles by reducing waste and conserving natural resources. The extremely fine granular composition of dune sand limits its use in mortar production. In this work, the dune sand granulometry was corrected using two percentages of recycled sand: 40% and 50%. The results indicated that incorporating recycled sand optimized the physical characteristics of the resulting sand mixture and the mortar. An improvement in mechanical and rheological characteristics was also observed. Indeed, the maximum increase in compressive and flexural strengths was obtained by the mortar containing 60% DS and 40% RS, compared to the control mortar (100% dune sand) with 56.25% and 63.15% respectively. For shrinkage, the best result was observed for the same concrete with a reduction of 57.82%. Weight loss was higher for mortars prepared by mixing recycled sand with dune sand, compared to the control mortar.