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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: An Accelerated Method of Estimating the 28-Day Splitting Tensile and Flexural Strengths of Concrete
Author(s): V.M. Malhotra
Publication: Special Publication
Appears on pages(s): 147-168
Keywords: accelerated tests; compressive strength; concrete pavements; flexural strength; quality control; regression analysis; research; splitting tensile strength; tensile strength
Abstract:In recent years there has been an increasing acceptance of accelerated strength tests for routine quality control of concrete and to estimate the 28-day compressive strength. However, very little, or no data, are available as to the use of accelerated strength tests for estimating the potential splitting-tensile strength and modulus of rupture of concrete. This study reports results of an investigation to determine the possibility of using the boiling procedure as an accelerated splitting-tension test. A total of twenty-two concrete mixes were made in the laboratory using limestone and natural sand as coarse and fine aggregates respectively. A total of 176 cylinders, 6 x 12 in. (152 x 305 mm) in size, and 44 prisms, 3.5 x 4 x 16 in. (89 x 102 x 466 mm) in size, were tested. The cylinders were tested in splitting-tension after accelerated- and moist-curing, and the prisms were tested in flexure after moist-curing. The correlations between the splitting-tensile strengths of accelerated-cured specimens and those of moist-cured specimens were statistically significant. The average within-batch variation for the splitting-tensile strength of accelerated-cured specimens was 5.1 per cent; the corresponding value for the strength of the 28-day moist-cured specimens was 5.7 per cent. From the analysis of the test results, it is concluded that the accelerated splitting-tensile test appears to be an adequate means for controlling the quality of pavement concrete. Those contemplating the use of the accelerated test for predicting the later-age splitting-tensile and flexural strengths of concrete are cautioned that they should develop their own correlations to allow for the variations in aggregates and cements.
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