Efeito de diferentes espécies de madeira e bambu na hidratação de matrizes à base de cimento Portland

Materia

article

Eduardo Hélio de Novais Miranda¹  Geraldo Aparecido da Silva¹  Diogo Antonio Correa Gomes¹  Mariana Nayara Lima da Silveira¹  Fabrício de Campos Vitorino²  Saulo Rocha Ferreira¹ 

[1] Universidade Federal de Lavras;Universidade Federal Fluminense

关键词: Biocomposites;    Lignocellulosic materials;    Low environmental impact products;   

DOI  :  10.1590/1517-7076-RMAT-2022-0194

学科分类：工程和技术（综合）

来源: Universidade Federal do Rio de Janeiro * Coordenacao dos Programas de Pos-Graduacao de Engenharia

【 摘 要 】

The present work aims to analyze the effect of different species of wood and bamboo (Pinus taeda, Cereus jamacaru and Bambusa vulgaris) on the hydration of cementitious matrices. For this, the lignocellulosic materials were ground and characterized before and after treatment in hot water. Subsequently, the effect of adding different levels (5, 10 and 33.3%) of wood, pre-treated or not, in cement pastes were analyzed using isothermal calorimetry and thermogravimetry tests. The results showed that the particles of each lignocellulosic species showed an increase in moisture and absorption properties concomitant with a decrease in their densities and extractive levels from the pre-treatment applied. The other chemical components of these elements, however, were mostly unaffected. On the other hand, it was observed that the higher the content of such lignocellulosic materials, pre-treated or not, in the cement matrices, the greater the impact on cement hydration, according to the calorimetry test. Regarding the result of the thermogravimetry test, a general trend was observed, with or without pre-treatment of particles or addition of make-up water, of an increase in hydrated products, a fact mainly attributed to the presence of free water and gases in the lignocellulosic materials.

【 授权许可】

CC BY