View article

To alleviate disposal burden of contaminated wood at landfills, construction wood waste can be recycled into cement-bonded particleboards, however, their qualities are often compromised by organic extractives and preservative chemicals in wood. In contrast to traditional approaches using phenol formaldehyde resin or chloride accelerator, this study proposed the use of eco-friendly CO₂ curing and fibre reinforcement to accelerate carbonation and enhance physical properties of the particleboards. Cement chemistry and microstructure characteristics were evaluated by using quantitative X-ray diffraction, mercury intrusion porosimetry, and scanning electron microscopy analyses. The 24-h CO₂ curing significantly facilitated cement hydration (i.e., more than 63 wt% amorphous cement hydrate) and accelerated Ca(OH)₂ transformation into CaCO₃, which contributed to strength development and carbon …