Diseño de hormigones de alta resistencia utilizando agregados de la cantera vega rivera y cemento holcim fuerte tipo gu

Abstract

The high-strength concrete has a great acceptance in the construction of civil works worldwide, therefore the construction industry has evolved along with technological advances. In Ecuador the requirements of infrastructures such as high traffic vehicles that require an early use of service so the use of high resistance concrete is more frequent. Currently the urban development of the city of Machala has presented a considerable increase, so it is evident the constant use of good quality concrete and high strength to ensure that these works last the time for what they were designed. The need to obtain a quality concrete makes it essential to know the physical and mechanical properties of the fine and coarse aggregates since the strength and durability of the concrete is in function of them, so the respective tests were carried out Laboratory. This technical project is designed to design high-strength concretes by varying the water/cement ratio to obtain the design dosages with the stone materials from the Vega Rivera del Rio San Agustín Quarry. Of the Canton Santa Rosa, Province of gold and the use of the HOLCIM cement strong type GU.The main object of the technical project is to find the appropriate dosage to obtain the required resistance (FCR) based on a specified resistance (FC), For which it is proposed to apply the methodology of the ACI to calculate the quantities of materials for the design of concrete and also to perform the test of consistency of the cement to obtain the relationship water/cement and obtain an initial relationship to begin with The design. The ACI being a leading organization in the management and practice of concrete, presents a method for designing concretes basing on fundamental principle that is the water/cement ratio obtained by means of a cement consistency test, annexing the properties Physical and mechanical aggregates as their size, density, absorption capacity, volumetric weight loose and compacted. The essential structures such as hospitals, universities, schools, and others are systems that agglomerate a lot of requirements for their design, so it will be required that the structural elements can withstand loads and that the concretes are high Compressive strength. For the design of concretes the tests of the physical and mechanical properties of the fine and coarse aggregates were made based on the NTE INEN where each of the procedures are broken down in order to perform them in a correct way. With the results of the aggregate tests and the water/cement ratio 0.30 and the aggregate size 3/4, a dosage was obtained to guarantee the highest compression resistance value, considering that this design is feasible. A unit price analysis was carried out for each resistance to make a comparison of each of the different dosages, a programming of works that allows us to perform a good control and execution of the project.