Durability Capacity Change of Rubber Powder Composite BRA Modified Asphalt Mixture

Table 3

Physical performance index of Marshall specimens.

Technical parameters	1	2	3	4	5	6	Normative limits
	Benchmark mixture	BRA modification	BRA+1# glue powder modification	BRA+2# glue powder modification	BRA+3# glue powder modification	BRA+4# glue powder modification
Gross volume density	2.396	2.425	2.403	2.426	2.419	2.436	—
Water absorption (%)	0.76	0.51	0.91	0.41	0.46	0.31	—
Measured theoretical density	2.526	2.534	2.516	2.531	2.526	2.539	—
Void ratio (%)	5.15	4.30	4.49	4.15	4.24	4.06	3～6
Technical parameters	1	2	3	4	5	6	Normative limits