Propriedades de pisos intertravados produzidos com resíduos vegetais e industriais

Abstract

Interlocking flooring is a material that favors sustainability and environmental conservation, since there is less energy consumption in its manufacturing process, a reduction in waste generation and a higher permeability of the floor. In addition, it has excellent physical and mechanical properties and is considered a low cost product, versatile and easy to apply. The use of vegetal and industrial waste in the manufacture of concrete blocks for paving is seen as an alternative, which can positively influence the properties of the floors and contribute to the preservation of the environment, since the use of these residues in the production. Interlocking floors can minimize the amount of these in the environment and their environmental impacts. The objective of this research was to verify the viability of using agro-industrial and industrial waste as raw material for the production of interlocking floors. The use of rice husk ash, sugarcane bagasse ash, rubber tire ash and slate residues was evaluated. Replacement of 10% and 20% of the cement by the waste was performed, verifying its effect on the physical, mechanical and durability properties of the floors. The materials used in replacement of cement were characterized in their compositions using X-ray diffraction. The aggregates were characterized by grain size. In order to verify the suitability of the materials used as partial cement substitutes, the suitability analysis was performed. The floors were made with control

formulation of 15% CPV-ARI cement, 23% gravel, 31% sand, 31% stone dust, using a water- cement ratio (W / C) of 0.77%. After the confection, the floors were cured for 28 days at room

temperature, and soon after, the mechanical properties of compressive strength, the physical properties of water absorption, bulk density and porosity, the microstructural and durability properties were evaluated. It was also analyzed the economic viability of the change in floor composition. The replacement of cement by waste had a significant effect on the physical and mechanical properties of floors. Regarding physical properties, all treatments at 28 days of cure and after accelerated aging are in accordance with the specifications of the standard. However, no treatment met the minimum requirements required by the standard for mechanical properties. The inclusion of waste resulted in a reduction in the cost of raw materials by 2.50%.