Specification Part 3 - Road & Bridge Works - Urban Administration ...

521.5.1. Binder Properties:
(i)For control of the quality of the base binder, the relevant provisions of clause 501.8.4.1.
(ii)Additionally modified binder shall be tested f or all the properties listed in Table 500-44, 500-45
or 500-46 as appropriate and certificates produced prior to use.
(iii)During use, the requirements for softening point, penetration and elastic recovery shall be
tested regularly. If the modified binder is producer
TABLE 500-44.
REQUIREMENTS OF POLYMER MODIFIED BINDERS (ELASTOMERIC THERMOPLASTICS
AND RUBBER LATEX)
Grade and Requirements
Designation PMB 120 PMB 70 PMB40 Method of
Test
Penetration at
25°C, 0. 1 mm,
l00g, 5 sec.
90 to 1 50 50 In X9 30 to 49
IS:1203-
1978
Penetration at 35 22 18 IS:1205-
4°C, 0.lmm
1978
200°, 60 sec..
Minimum*
Softening Point, 38 48 59 IS:1205-
(R&B), °C,
1978
Minim um
Fraass Breaking *-24 -16 -12 IS:9381-
Point, °C,
1978
Maximum
Ductility at 75 50 50 IS:1208-
27°C, cm.
1978
Minimum
Flash Point, 220 220 220 IS:1209-
COC, °C,
1978
Minimum
Elastic
70 60 50 ASTM
Recovery of
Half Thread in
Ductile meter at (50)** (40)** (30)** D5976-1996
15°C, %,
Minimum
Separation, 4 4 4 ASTM
Difference in
Softening
Point, R&B, °C,
Maximum
Viscosity at 1-3 2-6 4-8 15:1206-
150°C, Poise
1978
Designation Grade and Requirements Method of
Test
PMB 120 PMB 70 PMB40
Penetration at
4°C, 0 1 mm,
200g
60 sec ,
Minimum*
18 15 12 IS:1203-
1978