Scholarlink

<p>The rapid depletion of river sand and the growing accumulation of plastic waste have created serious sustainability challenges for the construction industry. Finding an eco-friendly, structurally viable substitute for sand in concrete production is thus a pressing necessity. In pursuit of sustainable construction materials, this study aims to evaluate the effects of varying levels of waste plastic substitution, ranging from 0% to 20%, on the fresh and hardened properties of concrete, thereby improving waste management strategies and reducing the need for river sand in M25-grade concrete through an experimental investigation involving 162 specimens of each type, i.e., cubes, cylinders, and beams. Investigations using scanning electron microscopy (SEM) aim to enhance the scientific understanding of the role of waste plastic in concrete. The Energy Dispersive X-ray Spectroscopy (EDS) analysis revealed a significant shift in elemental composition with increasing WPD content. The mechanical results aligned with microstructural trends, with strength and density improving up to 10% WPD due to better packing and matrix refinement. A decline was observed at 15%, reflecting compromised hydration and bonding. However, when used at a 10% replacement level, it significantly improves flexural and tensile strength by more than 40%. This makes it suitable for applications where unreinforced flexural strength is important, such as spillway floors, chute blocks, and pavement-quality concrete. Moreover, at this level, the 28-day compressive strength surpasses the characteristic strength, making it viable for use in standard structural concrete. Future work should examine long-term durability, environmental exposure, and combined use with supplementary cementitious materials.</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

Impact of the Partial Substitution of Sand with Waste Plastic Dust on the Performance Enhancement of Concrete

  • 期刊论文

  • 发表日期：

    2025年11月19日

查看全文
  • Bhawesh Madhukar,
  • Sanjay Kumar,
  • Baboo Rai

摘要

The rapid depletion of river sand and the growing accumulation of plastic waste have created serious sustainability challenges for the construction industry. Finding an eco-friendly, structurally viable substitute for sand in concrete production is thus a pressing necessity. In pursuit of sustainable construction materials, this study aims to evaluate the effects of varying levels of waste plastic substitution, ranging from 0% to 20%, on the fresh and hardened properties of concrete, thereby improving waste management strategies and reducing the need for river sand in M25-grade concrete through an experimental investigation involving 162 specimens of each type, i.e., cubes, cylinders, and beams. Investigations using scanning electron microscopy (SEM) aim to enhance the scientific understanding of the role of waste plastic in concrete. The Energy Dispersive X-ray Spectroscopy (EDS) analysis revealed a significant shift in elemental composition with increasing WPD content. The mechanical results aligned with microstructural trends, with strength and density improving up to 10% WPD due to better packing and matrix refinement. A decline was observed at 15%, reflecting compromised hydration and bonding. However, when used at a 10% replacement level, it significantly improves flexural and tensile strength by more than 40%. This makes it suitable for applications where unreinforced flexural strength is important, such as spillway floors, chute blocks, and pavement-quality concrete. Moreover, at this level, the 28-day compressive strength surpasses the characteristic strength, making it viable for use in standard structural concrete. Future work should examine long-term durability, environmental exposure, and combined use with supplementary cementitious materials.