Determination of correlation of compressive strength with maturity of concrete mixed with accelerator

The compressive strength of concrete mixtures with accelerator additives designed for structural elements with strength of 5000 psi was correlated with the maturity index of concrete at an early age. The design of the mixture was made by adding the quantity of additives according to the specificatio...

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Bibliographic Details
Published in:Journal of physics. Conference series 2019-11, Vol.1386 (1), p.12066
Main Authors: Medrano, C T, Peña-Rodríguez, G, García-Páez, I H
Format: Article
Language:English
Subjects:
Additives
Compression tests
Compressive strength
Concrete
Correlation coefficients
Design factors
Design of experiments
Mathematical analysis
Physics
Structural members
Temperature dependence
Temperature measurement
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Summary:The compressive strength of concrete mixtures with accelerator additives designed for structural elements with strength of 5000 psi was correlated with the maturity index of concrete at an early age. The design of the mixture was made by adding the quantity of additives according to the specifications of the supplier. The maturity index was calculated using the thermal profile of the concrete dependent of the setting time, which was obtained through an automated adiabatic system. The number of thermal sensors required for temperature measurement dependent of setting time (1, 3, 7, 14 and 28 days) was determined by a factorial experimental design of two factors. The correlation coefficient was 0.96, so the logarithmic model adequately explains the variability of the compressive strength. The equation obtained was validated by means of the values of resistance to compression measured by the standard method for each age of the concrete; all values are within the calibration range of the resistances estimated by the maturity method.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/1386/1/012066