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

Table 4

Mix design results for different specimens.

Specimen type/property	Control	15% CRCA		30% CRCA		50% CRCA		Specification limit
		Untreated	Treated	Untreated	Treated	Untreated	Treated
Optimum asphalt content (%)	5.1	5.3	5.2	5.8	5.4	6.3	5.6	—
Unit weight (g/cm^3)	2.371	2.344	2.356	2.315	2.327	2.263	2.294	—
Marshall stability (kg·f)	1470	1295	1386	1062	1204	712	901	Min 800
Marshall flow (mm)	2.23	2.57	2.34	3.15	2.68	3.71	3.29	2–3.5
Air void (%)	4	4	4	4	4	4	4	3–5
VMA (%)	15.76	14.80	15.02	14.13	14.87	13.52	14.37	Min 14
VFA (%)	74.62	72.97	73.38	71.69	73.10	70.42	72.16	65–75
Dp (P0.075/Pbe)	0.68	0.75	0.71	0.93	0.82	1.14	1.01	0.6–1.2