INCORPORA O DE RESíDUOS VEGETAIS E SEUS EFEITOS SOBRE AS CARACTERíSTICAS FíSICO-MEC NICAS DE MISTURAS DE SOLO-CIMENTO PARA FINS DE CONSTRU O RURAL

PLANT RESIDUES INCORPORATION EFFECTS ONPHYSICAL AND MECHANICAL CHARACTERISTICSOF SOIL-CEMENT MIXTURES FOR AGRICULTURALBUILDINGS PURPOSESThe aim of this research was to evaluate the effect of riceand Brachiaria brizantha husks on physical and mechanicalproperties of soil-cement mixtures and, consequently, to analysetheir technical feasibility to manufacture alternative buildingmaterials for agricultural purposes. Husks were ground, sieved,and treated in lime solution and soil submitted to characterisationtests according to Brazilian standards. The plant residues wereadded in substitution to the cement. The cement content andresidues ranged from 100% of cement and 0% of waste, to 60%of cement and 40% of waste. Following, cylindrical specimenswere molded and submitted to compression test at 7, 28, and 56days, and water absorption test seven days from molding. Theresults showed that the mixtures obtained from the partialsubstitution of cement by 10% waste are technically feasible asraw materials for constructive elements manufacturing withoutstructural function, such as bricks and blocks, for agriculturalbuildings.