Abstract

RICO-RODRIGUEZ, Israel et al. Thermal evaluation of cement composite reinforced with fine aggregate of CBC and FO treated with Silane. Ing. invest. y tecnol. [online]. 2020, vol.21, n.1, e00001.  Epub Aug 03, 2020. ISSN 2594-0732.  https://doi.org/10.22201/fi.25940732e.2020.21n1.001.

The use of natural fibers (jute, coconut, cane, etc.) and agroindustrial waste (ash, rice husk, etc.) as reinforcing materials in obtaining composite materials has been increasing, because they are considered low cost and easy obtaining. The interactions of the reinforcing materials as well as the physical, chemical and mechanical properties that transfer to the material have been studied. In this research, a material was developed with a composite portland cement matrix (CPC-30R) reinforced with fine aggregate of cane bagasse charcoal (CBC) and sugarcane bagasse fiber (FO). The FO was modified on the surface, initially went a process of delignification with NaOH to 6.0 % and blanching with NaClO2 V/V to 0.5 % and H2O2 V/V to 0.34 %, for removal of hemicellulose and get a fiber with greater exposure of cellulose, subsequently modified with two types of compounds of silane, Isooctyl trimethoxylsilane at 97 % and Trimethoxy methylsilane to 95 %. The FO was analyzed by infrared spectroscopy (FTIR) and its hydrophobicity was evaluated. The treated FO was mixed with different amounts of CPC-30R and water. The morphology of the composite material was observed by Scanning Electron Microscopy (SEM), which showed the interaction of the fine aggregate of CBC in the CPC -30R matrix. The thermal behavior of the material was evaluated in an isolated hot plate equipment, according to the ASCTM-C177 standard, obtaining thermal conductivity results of 0.21 W / m °C.

Keywords : FTIR; SEM; delignification; silane; hydrophobic; composite material; fiber sugar cane bagasse; cane bagasse coal; thermal conductivity.