Issue |
MATEC Web Conf.
Volume 117, 2017
RSP 2017 – XXVI R-S-P Seminar 2017 Theoretical Foundation of Civil Engineering
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Article Number | 00066 | |
Number of page(s) | 8 | |
DOI | https://doi.org/10.1051/matecconf/201711700066 | |
Published online | 24 July 2017 |
Predicting of the compressive strength of RCA concrete
1 Warsaw University of Technology, Faculty of Building, Mechanics and Petrochemistry, Łukasiewicza 17, 09-402 Płock, Poland
2 University of Žilina, Univerzitná 1, 010 26 Žilina, Slovakia
* Corresponding author: Roman.Jaskulski@pw.edu.pl
The paper presents the results of predicting the strength of 61 concretes made with the use of recycled concrete aggregate (RCA). Five models in the form of first-order polynomials containing two to six variables characterizing the composition of the mixture were formulated for this purpose. Factors for unknowns were selected using linear regression in two variants: with and without additional coefficient. For each model, the average absolute error of the concrete strength estimation was determined. Because of the various consequences of underestimation and overestimation of the results, the analysis of models quality was carried out with the distinction of the two cases. The results indicate that the key to improving the quality of models is to take into account the quality of the aggregate expressed by the ACV parameter. Better match results were also obtained for models with more variables and the additional coefficient.
© The Authors, published by EDP Sciences, 2017
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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