Page 67 - HIGHWAY ENGINEERING LABORATORY_FLIP BUILDER

Page :
WORK INSTRUCTION
Edition :
Checking No.
MARSHALL STABILITY TEST
(Reference Standard:
CIVIL ENGINEERING ASTM D6927 - 06) Effective Date:

JKA/ DCC30112/ 2021 Amendment Date:

1.0 OBJECTIVE

To determine the optimum bitumen content in the mix wearing course and binder
course in designing the pavement structural of flexible pavement

2.0 THEORY

Flexible pavement design consists of two main elements that is design thickness and mix
design. Thedesignthicknessisrelatedtothesemester6syllabus,whichisdesignedbasedon

RoadNote
29.Mix design is focused on a mixture of substances used as binder layers and wear layers.
These materials must be through a proper mix design. There are various methods of mix
design,butthe Marshall Mix design method is the most popular.

Apart from determining the optimum bitumen content, this method can also specify
aggregate grading on the most suitable mix design. The Marshall method outlines the
procedure beginning with specimen preparation until the determination of optimum

bitumen content.

Marshall Method is as follows :
1. Aggregate Grading

2. Aggregate Blending

3. Preparation of mixedgroups
4. Compaction
5. Unit Weight Determination

6. Marshall Stability Test

7. HollowComputation
8. Determination of Optimum Bitumen Content

Higway Engineering Laboratory page 54