The influence of the initial moisture content on densification process of D. asper bamboo: Physical-chemical and bending characterization

Kadivar, Marzieh; Gauss, Christian; Mármol, Gonzalo; Sá, Adriana Dominique de; Fioroni, C.A.; Ghavami, Khosrow

doi:10.1016/j.conbuildmat.2019.116896

Cited by 48 publications

(27 citation statements)

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“…Kadivar et al (2019) [ 65 ] used an open thermal press to densify bamboo D. asper in its radial direction using various initial MC, from 0 to 20%. The study evaluated the effect of starting MC on bending and physical-chemical characteristics of the material.…”

Section: Discussion Of the Effective Parametersmentioning

confidence: 99%

“…Several researchers have reported the microstructure of densified bamboo [ 16 , 63 , 64 , 65 ]. According to the microscopic results of Archila-Santos et al (2016) [ 64 ], the vessels (vascular conduits) close as the result of densification.…”

Section: Discussion Of the Effective Parametersmentioning

confidence: 99%

“…It is also possible to see the different compaction of bamboo components such as fiber bundle and parenchyma. Kadivar et al (2019) [ 65 ] stated that the densification happens principally in the central layer of the samples section [ 65 ].…”

Section: Discussion Of the Effective Parametersmentioning

confidence: 99%

“…Therefore, in this method, special attention should be paid to the initial MC; low MC makes it difficult for the material to be densified, and high MC can cause an explosion. Stabilizing wood at 13% MC [ 100 ], and bamboo at 10% [ 65 ] is suggested to be enough to facilitate the process. Some commercial products developed during the 1950s were produced through this method [ 101 ].…”

Section: Densified Bamboomentioning

confidence: 99%

“…Research has shown that both wood and bamboo materials exposed to TM densification have higher bending resistance and modulus of elasticity than the natural one [ 65 , 102 ]. The influence of effective parameters involved in TM process on the final densified material has been studied [ 103 , 104 ].…”

Section: Densified Bamboomentioning

confidence: 99%

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Densification of Bamboo: State of the Art

et al. 2020

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Densification processes are used to improve the mechanical and physical properties of lignocellulose materials by either collapsing the cell cavities or by filling up the pores, consequently reducing the void volume fraction. This paper focuses on an extensive review of bamboo densification process, which is achieved by compressing the material in the direction perpendicular to the fibers using mainly two different techniques: an open system, thermo-mechanical (TM), or a closed system, viscoelastic-thermal-compression (VTC). The main aim of bamboo densification is to decrease its heterogeneity, as well as to improve its mechanical and physical performance. In addition, densification may occur during the manufacturing of bamboo products in which hot-pressing processes are used to mold bamboo panels. There are over 1600 publications about bamboo, concentrated in the recent decade, mainly about engineered materials. Although several papers regarding bamboo and wood densification are available, very few studies have comprehensively investigated the densification process solely through compression of natural bamboo culms. According to the literature, applying a combination of compression of 6–12 MPa at temperatures between 120–170 °C for 8–20 min can produce materials with higher strength in comparison to the mechanical properties of natural bamboo. The majority of research on bamboo densification indicates that the modified material results in improved properties in terms of density, hardness, bending strength, stiffness, and durability. This paper provides a review that consolidates knowledge on the concept of bamboo culm densification, discusses the roles of parameters that control the process, ascertains the best practice, and finally determines gaps in this field of knowledge.

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Section: Discussion Of the Effective Parametersmentioning

confidence: 99%