Rutting Resistance of Hot Mix Asphalt Containing Coarse Recycled Concrete Aggregates Coated with Waste Plastic Bottles

Table 7

Results of t-test to investigate the effect of CRCA percentage on the stiffness modulus.

Temperatures	CRCA (%)	Dataset	Levene’s test for equality of variances			t-test for equality of means
			Variance	F	Sig.	t	df	Sig.
25°C	15	Set 1: untreated	Assumed	0.002	0.968	−1.848	4	0.013
		Set 2: treated	Not assumed			−1.848	3.996	0.013
	30	Set 1: untreated	Assumed	0.012	0.919	−4.678	4	0.009
		Set 2: treated	Not assumed			−4.678	3.977	0.010
	50	Set 1: untreated	Assumed	0.043	0.846	−8.943	4	0.001
		Set 2: treated	Not assumed			−8.943	3.917	0.001
40°C	15	Set 1: untreated	Assumed	0.026	0.879	−7.014	4	0.002
		Set 2: treated	Not assumed			−7.014	3.984	0.002
	30	Set 1: untreated	Assumed	0.087	0.783	−12.773	4	0.000
		Set 2: treated	Not assumed			−12.773	3.835	0.000
	50	Set 1: untreated	Assumed	0.248	0.645	−21.544	4	0.000
		Set 2: treated	Not assumed			−21.544	3.572	0.000