Análisis comparativo estadístico de resultados de resistencia a la comprensión de hormigones de alta resistencia entre 50MPA empleando cilindros de 15 x 30 cm7

Abstract

Over the years the quality control of the concrete has been carried out through the test of resistance to simple compression with the use of cylinders of 15 cm. Diameter by 30 cm. Of height, being standardized according to ASTM C 31 and ASTM C 39. When evaluating high strength concrete in specimens of 15x30 cm. There are some difficulties such as: greater load capacity for the test machine, greater volume of concrete and more work in handling and transport. In the laboratory of the UCG studies have been carried out on high strength concrete with the use of specimens of 15 X 30 cm., Presenting certain difficulties already mentioned previously. In view of this situation the present investigation intends to evaluate the resistance to the compression in specimens of 10 cm. Diameter by 20 cm. Of height for resistances between 50 MPa and 80 MPa, always maintaining a height / diameter ratio equal to two; For this purpose, statistical methods such as: Linear regression of least squares, Hypothesis test for small samples [1] and Regression analysis with X-error (Mandel 1984) (ACI 228.1R) [21, arriving to obtain equations that Allows to estimate the compressive strength of the cylinders of 15x30 cm. Using cylinders of 10x20 cm.