DESIGN OF FORMULAS IN CONVENTIONAL AND SPECIAL CONCRETE MIXTURES, FOR OPTIMIZING THE PACKING OF PARTICLES THAT FORM THE CONCRETE MIXTURE, INTENDED TO IMPROVE THE MECHANICAL PROPERTIES THEREOF.

摘要

Design of formulas of conventional and special concrete mixtures for optimizing the packing of fine and thick particles that form the concrete mixture with a resistance higher or equal to 100kg/cm2, with a resistance higher or equal to 150kg/cm2, with a resistance higher or equal to 200kg/cm2, with a resistance higher or equal to 250kg/cm2, with a resistance higher or equal to 300kg/cm2, with a resistance higher or equal to 350kg/cm2 for improving the mechanical property of compression resistance thereof. The design of specific formulas containing Portland cement, a thick aggregate, sand, water and a chemical additive will be useful for distributing the particles in a better way, based on the American Concrete Institute (ACI) specifications, said formulas forming the concrete mixture which will reduce interstitial spaces or vacuums; the result is to achieve a higher density in the concrete mass which would be higher than 2%, thus obtaining a higher resistance to axial stress applied i n an increase of 13% to 15%. The design of the novel formulas may reduce the water/cement ratio factor in a 6%, which increases the compression resistance. The compression increase may strengthen the interface of the cementing rocky aggregate due to the increase of the contact surface and the continuous distribution of the concrete matrix. The laboratory rupture tests verify said increase in the compression resistance.