Scholarlink

<p>To enable the high-value utilization of decommissioned wind turbine blades, this study presents a new strategy that goes beyond using recycled glass fiber-reinforced polymer (GFRP) as inert fillers or high-replacement supplementary cementitious materials. Glass fiber-reinforced polymer from retired blades was mechanically ground into micro-scale particles and surface-functionalized using an epoxy–silane coupling agent. The treated particles were incorporated into a cement paste at low dosages, ranging from 1 to 5 wt.%. The silane interface modification effectively improves the interfacial bonding between GFRP particles and the cement matrix, optimizes the microstructure and thus enhances the mechanical properties of the composites. Multi-scale characterization shows that silane modification reconstructs the interface between recycled particles and the cement matrix. The conventional low-modulus and porous interfacial transition zone is replaced by a gradient-strengthening layer with an elastic modulus that increases from the matrix to the particles. Meanwhile, the volume fraction of harmful pores larger than 50&#xa0;nm is significantly reduced. The 28 d compressive strength of cement paste with 3 wt.% silane-modified particles is increased by approximately 40% compared with plain cement paste and is considerably higher than that with unmodified particles at the same dosage. These results confirm that mechanically recycled wind turbine blade particles can act as effective micro-reinforcing phases in cement-based materials at very low dosages after interface engineering. This work presents a feasible and high-value pathway for recycling thermoset composite waste from retired wind turbine blades.</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

Mechanisms governing the influence of silane-modified recycled wind turbine blade glass fiber-reinforced polymer particles on the cement paste interface and mechanical properties

  • 期刊论文

  • 发表日期：

    2026年7月26日

查看全文
  • Haoying Wang,
  • Qiang Tao,
  • Maowen Qi

摘要

To enable the high-value utilization of decommissioned wind turbine blades, this study presents a new strategy that goes beyond using recycled glass fiber-reinforced polymer (GFRP) as inert fillers or high-replacement supplementary cementitious materials. Glass fiber-reinforced polymer from retired blades was mechanically ground into micro-scale particles and surface-functionalized using an epoxy–silane coupling agent. The treated particles were incorporated into a cement paste at low dosages, ranging from 1 to 5 wt.%. The silane interface modification effectively improves the interfacial bonding between GFRP particles and the cement matrix, optimizes the microstructure and thus enhances the mechanical properties of the composites. Multi-scale characterization shows that silane modification reconstructs the interface between recycled particles and the cement matrix. The conventional low-modulus and porous interfacial transition zone is replaced by a gradient-strengthening layer with an elastic modulus that increases from the matrix to the particles. Meanwhile, the volume fraction of harmful pores larger than 50 nm is significantly reduced. The 28 d compressive strength of cement paste with 3 wt.% silane-modified particles is increased by approximately 40% compared with plain cement paste and is considerably higher than that with unmodified particles at the same dosage. These results confirm that mechanically recycled wind turbine blade particles can act as effective micro-reinforcing phases in cement-based materials at very low dosages after interface engineering. This work presents a feasible and high-value pathway for recycling thermoset composite waste from retired wind turbine blades.