Description of MS Wordsty lesused in the journal Matéria

ABSTRACT

The objective of the work is the chemical and microstructural characterization of the composites, verifying the inhibition index of the vegetable fibers with the cementitious matrix, its interference in the hydration of the Portland cement, the chemical composition of the fiber and the composite, and possible processes of degradation of the fiber in the matrix. The raw materials used to form the composites included: Portland cement, kraft fibers and water. Different levels of kraft fiber addition (reference, 0.5%, 1.0% and 3.0%) were evaluated in relation to cement mass and threewater/cementratios (0.40; 0.45 and 0. 50). It was possible to evaluate the interference of kraft fibers in the hydration of Portland cement, which was classified as low inhibition, demonstrating the compatibility of the fibers with the cementitious matrix according to the analyzes carried out. Regarding the temperature, no major differences were found that would show a delay in hydration due to the inhibitory components of the vegetable fiber, as well as no degradation process of the kraf fibers (mineralization) was detected.

Keywords
Cement packing; kraft fiber; cement matrix; inhibition index