Effect of Nano-Modified Recycled Wood Fibers on the Micro/Macro Properties of Rapid-Hardening Sulfoaluminate Cement-Based Composites
Chunyu Ma, Liang Wang, Yujiao Li, Qiuyi Li, Gongbing Yue, Yuanxin Guo, Meinan Wang, Xiaolong Zhou
TL;DR
This study explores how modifying recycled wood fibers with nano-silica and a silane agent improves the strength and durability of eco-friendly cement composites.
Contribution
The paper introduces a novel method of enhancing recycled wood fiber composites using nano-silica and silane coupling agents for sustainable construction.
Findings
KH560-modified samples showed 8.5% and 14.3% increases in flexural and compressive strength compared to controls.
KH560 reduced drying shrinkage by 27.2%, outperforming NS in durability improvements.
Microstructural tests showed KH560 formed Si-O-C bonds, while NS acted through pore-filling mechanisms.
Abstract
Recycled wood fiber (RWF) obtained through the multi-stage processing of waste wood serves as an eco-friendly green construction material, exhibiting lightweight, porous, and high toughness characteristics that demonstrate significant potential as a cementitious reinforcement, offering strategic advantages for environmental protection and resource recycling. In this study, high-performance sulfoaluminate cement (SAC)-RWF composites prepared by modifying RWFs with nano-silica (NS) and a silane coupling agent (KH560) were developed and their effects on mechanical properties, shrinkage behavior, hydration characteristics, and microstructure of SAC-RWF composites were systematically investigated. Optimal performance was achieved at water–cement ratio of 0.5 with 20% RWF content, where the KH560-modified samples showed superior improvement, with 8.5% and 14.3% increases in 28 d flexural and…
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Taxonomy
TopicsInnovative concrete reinforcement materials · Innovations in Concrete and Construction Materials · Natural Fiber Reinforced Composites