Influence of Indian cedar particle pretreatments on cement-wood composite properties

Abstract

This work physically, mechanically, and chemically characterized the composites produced from Portland CP II-E32 cement and fresh Indian cedar wood particles previously treated by immersion in hot and cold water. Density values for wood particulate composites were around 50% lower compared with the wood-free control treatment, from 0.88 to 1.78 g/cm³. A larger swelling was observed for the composite material. The results of compressive strength and stiffness indicated that there is no need for particle treatment for composite production. Hot and cold water immersion treatments reduced the total Indian cedar wood extractives by 33% and 42%, respectively. Optical microscopy analysis was used to identify adhesion failures between the cement/wood interface of the composite produced with fresh particles, which presented a higher percentage of extractives. This result indicated that the greater concentration of total extractives partially inhibits the matrix-matrix interaction reinforcement. Despite the reduction in total extractives caused by the treatments, this process is not necessary for the composite production because there is no statistical difference between the treatments. The values obtained for the composite indicate the possibility of application in sealing blocks in light construction systems.

Cross laminated timber bonding quality for different brazilian species and pressing levels

“…and lazcar (Acrocarpus fraxinifolius Arn.) which, despite being promising in obtaining solid wood products, have been little studied so far (Braz et al 2013, Faria et al 2019, Oliveira et al 2020a).…”

Characterization of Acrocarpus fraxinifolius wood submitted to heat treatment

“…However, in Brazil, the specie is still practically unknown, and national studies using the species are focused on silviculture (Nisgoski et al 2012, Venturin et al 2014) and physical and chemical characterization (Prado et al 2003). Few studies have been carried out to expand the range of uses of this species, such as the potential use in OSB panels (Iwakiri et al 2014), agglomerated wood panels (Trianoski et al 2013), wood cement (Oliveira et al 2020) and other construction applications.…”

Propose of models to estimate toughness as a function of physical and chemical properties of commercial thermally modified hardwoods

“…For Indian Cedar (Acrocarpus fraxinifolius) and Australian Cedar (Toona ciliata var. australis), few researches are available, evaluating their use on particleboards, indicating the possibility on commercial purpose on civil construction, industry an furniture [26][27][28][29][30].…”