Mathematical modelling of concrete compressive strength with waste tire rubber as fine aggregate

With the increasing number of vehicle due to the boom of population and rapid modernisation, the management of waste tire is growing problem. Reusing grinded tire rubber in concrete is a green innovation which provide an outlet for reusing waste tire. While providing certain benefits to concrete, in...

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Bibliographic Details
Published in:Journal of Mechanical Engineering and Sciences 2021-09, Vol.15 (3), p.8344-8355
Main Authors: Chong, B. W., Othman, R., Ramadhansyah, P. J., Doh, S. I., Li, Xiaofeng
Format: Article
Language:English
Subjects:
Bonding strength
Cement paste
Compressive strength
concrete
Concrete properties
Design of experiments
Error analysis
Exponential functions
Mathematical analysis
Mathematical models
Modernization
regression
Regression analysis
Response surface methodology
Root-mean-square errors
Rubber
waste tire rubber
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Summary:With the increasing number of vehicle due to the boom of population and rapid modernisation, the management of waste tire is growing problem. Reusing grinded tire rubber in concrete is a green innovation which provide an outlet for reusing waste tire. While providing certain benefits to concrete, incorporation of tire rubber results in significant loss of concrete compressive strength which hinders the potential of rubberised concrete. This paper aims to develop mathematical models on the influence of tire rubber replacement on the compressive strength of concrete using design of experiment (DoE). 33 data sets are gathered from available literature on concrete with waste tire rubber as partial replacement of fine aggregate. Response surface methodology (RSM) model of rubberised concrete compressive strength shows great accuracy with coefficient of determination (R2) of 0.9923 and root-mean-square error (RMSE) of 2.368. Regression analysis on the strength index of rubberised concrete shows that rubberised concrete strength loss can be expressed in an exponential function of percentage of replacement. The strength loss is attributed to morphology of rubber particles and the weak bonds between rubber particles and cement paste. Hence, tire rubber replacement should be done sparingly with proper treatment and control to minimise concrete strength loss.
ISSN:2289-4659
2231-8380
DOI:10.15282/jmes.15.3.2021.12.0656