Probabilistic Modelling of Strength of Concretes with RCA

Abstract:

The subject of the work is research and probabilistic modelling of compressive and tensile strength of concrete with recycled concrete aggregate (RCA). Sixteen series of concrete containing natural aggregate and RCA of 50% by mass of coarse aggregate (fraction 4 – 16 mm). Concrete specimens were tested for compressive and tensile splitting strength. In the study also the absorptivity of recycled and natural aggregate was tested, which is the amount of water that both types of aggregates can absorb during concrete mix. Based on the results models were formulated describing the compressive and tensile strength of concrete with RCA. These models are based on the design parameters of the concrete mix. In order to determine the coefficients of the models an estimating of a function of several variables by linear regression was performed. Compliance of the values ​​calculated using the models with the values ​​obtained from the tests was determined by Monte Carlo simulation. The results indicated a possibility of obtaining a high compliance of the test results with results obtained from simulations based on formulated models.

• Periodical: Key Engineering Materials (Volume 722)
• Pages: 207-215
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.722.207
• Online since: December 2016
• Authors: Roman Jaskulski*, Anna Stępień, Marlena Sobocińska
• Keywords: Compressive Strength, Monte Carlo Simulation, Probabilistic Modelling, Recycled Concrete Aggregate, Tensile Strength

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