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Calibration of the maturity method
CSSI has the facilities and the know-how to address both the experimental and numerical components of the calibration process of your concrete, according to current standards (ASTM C1074-UNE 83160).
The practical application of the concrete strength calculation by the maturity method starts from the experimental obtaining of the relationship between the temperature and the strength of the concrete under consideration. This relationship allows, subsequently, to determine the evolution of strengths according to its thermal history.
Obtaining calibration
The calibration process consists of manufacturing a minimum of 17 test specimens in the laboratory of the same mix to be used on site. Two of them are used to record the evolution of temperatures and the others to characterize the evolution of mechanical properties at a minimum of 5 different ages. After all the mechanical tests have been carried out, the maturity (or equivalent time)-resistance curve is adjusted numerically.
Calibration validation
Once the calibration curve has been obtained, it is essential to validate from time to time its applicability in real and changing site conditions. Validation guarantees that the initial parameters obtained in the laboratory faithfully reflect the behavior of the concrete in the field.
Ask us about the recommended frequency of validations and the most appropriate methods according to the specific needs of each project.
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