Durability and microstructure analysis of CO_2-cured cement-bonded wood particleboard

摘要

Dry-processed cement-based wood composites are reconstituted wood products with desirable longevity, fire resistance and life cycle cost. In this study, the effects of accelerated aging on the performance of CO_2-cured cement-bonded wood particleboards were investigated. The accelerated aging conditions considered simulated natural aging phenomena. Repeated wetting-drying and freezing-thawing cycles led to increased stiffness and somewhat reduced toughness. X-ray diffraction and thermogravimetric analyses indicated that aging effects led to increased CaCO_3 and decreased Ca(OH)_2 contents in CO_2-cured cementitious composites. Mercury intrusion porosimetry test results indicated that C0_2 curing reduced the capillary pore volume in both unaged and aged boards.