Page 54 - Unit 2: Pavement Material

Civil Engineering Department | DCC3113 : Highway & Traffic Engineering

AC Mix Specification Parameter for AC JKR/SPJ/2008-S4

• The mixture shall be designed in accordance to the Standard Marshall Test Method.
• It shall conform to the following requirements :

Table : Test and analysis parameters
Source : Jabatan Kerja Raya, STANDARD SPECIFICATION FOR ROADWORKS, JKR/SPJ/2008-S4, 2008 (page 28)

Parameter Wearing Course Binder Course
Stability (S) > 8000 N > 8000 N

Flow (F) 2.0 – 4.0 mm 2.0 – 4.0 mm

Stiffness (S/F) > 2000 N/mm > 2000 N/mm
Air Voids in Total Mix (VIM) 3.0 – 5.0 % 3.0 – 7.0 %

Voids Filled with Bitumen (VFB) 70 – 80 % 65 – 75 %

• If all the value comply with the table, the mixture with the mean optimum bitumen
content shall be used in plant trials
• If any values does not comply with table, the mix design procedure shall be repeated
using different laboratory design mix aggregate gradation until all the design parameters
are satisfied

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Prepared by : SITI ZURAIFA BINTI MD SAH, zuraifa@pmu.edu.my