Study of thermal and mechanical properties of cementitious composites produced with residues from Porto Velho timber industry

Materia

Ribeiro, Umberto Gonçalves¹ 

[1] Universidade Federal do Amazonas, Amazonas, Brasil

关键词: Unconventional materials;    Wood-cement;    Portland Cement;    Waste wood;    Thermal insulating.;   

DOI  :  10.1590/s1517-707620180004.0575

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 main objective of this work was to evaluate cementitious composites with addition of waste from wood processing industry for use in construction as a thermal insulator. A matrix of pozzolanic Portland cement CP IV-32 was modified by partially replacing the cement with Metacaulinite (10%) and calcium hydroxide (Ca(OH)2) (5%), for setting control and compatibility with residues. Residues of 2.5%, 5.0% and 7.5% were added in partial replacement to the fine aggregate, compared to a conventional mixture. The thermal performance was developed through a heat retention box constructed with panels produced with mixtures in the specified percentages, being measured internal and external temperatures simultaneously for 30 minutes. The physical properties, compressive strength and 4-point bending were developed to verify the physical and mechanicalperformance of the components. The results showed a reduction in density and consumption of conventional materials, but the heat transfer between internal and external faces of panels presented statistically equivalent values, with coefficient of variation ≅ 18%, on analysed configuration. Metacaulinite and Ca(OH)2 presented improvements on physico-mechanical performance of composites, especially in the early ages.

【 授权许可】

CC BY