Scholarlink

<p>This study investigates lightweight concrete incorporating perlite and lightweight expanded clay aggregate (LECA) for non-structural applications. Four mixture designs (Types I–IV) are developed to systematically evaluate the impact of replacing conventional aggregates on mechanical performance, durability, density, and thermal conductivity. Increasing perlite and LECA content led to significant reductions in specific gravity (from 2.47 to 0.90&#xa0;g/cm<sup>3</sup>), compressive strength (from 31.59 to 6.35&#xa0;MPa), and thermal conductivity (from 1.45 W/m·K to 0.32 W/m·K), values that align well with practical requirements for non-structural elements: partition walls typically require 5–15&#xa0;MPa compressive strength and moderate durability, insulation panels demand thermal conductivity below 0.5 W/m·K (with “excellent” performance &lt; 0.35 W/m·K), and lightweight fill systems prioritize density under 1.0&#xa0;g/cm<sup>3</sup> to reduce dead load. Strong linear correlations (R<sup>2</sup> up to 0.9996) between aggregate replacement levels and concrete properties enable precise mix design tailored to specific application criteria. However, increased water absorption (up to 15.5%) and reduced freeze–thaw resistance (a relative dynamic modulus drop from 92 to 70%) highlight durability limitations in harsh environments, necessitating protective measures or supplementary materials in moisture-prone or cold climates. The study’s novelty lies in its comprehensive comparative framework across four substitution levels, providing engineers with regression-based tools to optimize perlite–LECA concrete for energy-efficient, sustainable construction while balancing performance and serviceability requirements.</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

Comparative Analysis of Perlite and Leca in Lightweight Concrete for Non-structural Applications

  • 期刊论文

  • 发表日期：

    2025年11月4日

查看全文
  • Houshyar Eimani kalehsar,
  • Arian DarvishaliNezhad

摘要

This study investigates lightweight concrete incorporating perlite and lightweight expanded clay aggregate (LECA) for non-structural applications. Four mixture designs (Types I–IV) are developed to systematically evaluate the impact of replacing conventional aggregates on mechanical performance, durability, density, and thermal conductivity. Increasing perlite and LECA content led to significant reductions in specific gravity (from 2.47 to 0.90 g/cm3), compressive strength (from 31.59 to 6.35 MPa), and thermal conductivity (from 1.45 W/m·K to 0.32 W/m·K), values that align well with practical requirements for non-structural elements: partition walls typically require 5–15 MPa compressive strength and moderate durability, insulation panels demand thermal conductivity below 0.5 W/m·K (with “excellent” performance < 0.35 W/m·K), and lightweight fill systems prioritize density under 1.0 g/cm3 to reduce dead load. Strong linear correlations (R2 up to 0.9996) between aggregate replacement levels and concrete properties enable precise mix design tailored to specific application criteria. However, increased water absorption (up to 15.5%) and reduced freeze–thaw resistance (a relative dynamic modulus drop from 92 to 70%) highlight durability limitations in harsh environments, necessitating protective measures or supplementary materials in moisture-prone or cold climates. The study’s novelty lies in its comprehensive comparative framework across four substitution levels, providing engineers with regression-based tools to optimize perlite–LECA concrete for energy-efficient, sustainable construction while balancing performance and serviceability requirements.