Skid Resistance of nano silica modified roller compacted rubbercrete for pavement applications: Experimental methods and response surface methodology

Skid Resistance of nano silica modified roller compacted rubbercrete for pavement applications: Experimental methods and response surface methodology

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Roller compacted concrete (RCC) pavement usage is limited to low-speed roads due to its low skid resistance, caused by the smooth surface iphone 14 price arizona texture that makes it unsuitable for use in high-speed traffic pavements.If used in high-speed roadways will lead to increased skid related accidents.In this study, crumb rubber was used as partially replaced with fine aggregate at levels 10, 20, and 30% by volumeto produce roller compacted rubbercrete (RCR) so as to improve the skid resistance of RCC pavement, and nano silica was added at 0, 1, 2 and 3% by weight of cementitious materials to mitigate loss of strength with incorporation of crumb rubber.The British Pendulum Number (BPN) was used to measure the skid resistance.Incorporating up to 20% crumb rubber and 2% nano silica increases both skid and impact resistance.

The findings showed that RCR with 20% CR and 2% NS can be used for motorways, trunk, and class 1 roads.Finally, response surface methodology was used to develop the relationship between BPN in wet/dry conditions and crumb rubber/nano-silica.The analysis of variance for response surface methodology analysis shows that the quadratic models developed has a very good degree of correlation, and can be used click here to predict the skid resistance of RCR.The results of multi-objective optimization showed that an optimum mixture can be achieved with a 17.20% volumereplacement of fine aggregate and 1.

87% nano silica addition by weight of cementitious materials to have the highest skid resistance RCR for pavement applications.