Propriedades tecnológicas do tijolo solo-cimento vazado de 2 furos

The soil-cement brick has a low production cost, durability, no burning process, and is considered an ecological brick. The soil used presented particle size between 0.2-80μm, crystalline phases of quartz and kaolinite, liquidity and plasticity limities of 44% and 30% respectively. The soil powders:sand:CP-V ARI cement were mixed with 6:2:1 ratio, added water to acquire plasticity, formed by uniaxial pressing (2 tons), obtaining cylindrical test pieces of ϕ 50x100 mm, followed by curing in water for 7 days. They were submitted to the simple compression test, obtaining an average of 2.75 MPa. Two-hole soil-cement bricks, with the same composition, were pressed in a hydraulic press (6 tons), with dimensions of 250x126x69 mm, performed water absorption and simple compression tests, obtaining averages of 18.95% and 2.09 MPa, respectively. Both have mechanical resistance within the one estimated in NBR 8492, but smaller value for the brick, possibly due to the influence of the geometry and overlay effect.