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

Chong, B. W. and Rokiah, Othman and Putra Jaya, Ramadhansyah and Doh, Shu Ing and Li, Xiaofeng (2021) Mathematical modelling of concrete compressive strength with waste tire rubber as fine aggregate. Journal of Mechanical Engineering and Sciences (JMES), 15 (3). 8344 -8355. ISSN 2289-4659 (print); 2231-8380 (online). (Published)

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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.

Item Type: Article
Additional Information: Indexed by Scopus
Uncontrolled Keywords: Concrete; Compressive strength; Waste tire rubber; Response surface methodology; Regression
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TH Building construction
Faculty/Division: Institute of Postgraduate Studies
College of Engineering
Faculty of Civil Engineering Technology
Depositing User: Dr. Doh Shu Ing
Date Deposited: 21 Mar 2022 01:42
Last Modified: 21 Mar 2022 01:42
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