Marshall Stability and Flow Tests

TESTS ON BITUMEN

Marshall Stability and Flow Tests

Code: This test is done as per ASTM D 1559.

Preparation of Sample:

The sample needed is from Marshall Stability graph, select proportions of coarse aggregates, fine aggregates and filler in such a way, so as to fulfil the required specification. The total weight of the mix should be 1200g.

Procedure:

  • i) Heat the weighed aggregates and the bitumen separately up to 170oC and 163oC respectively.
  • ii) Mix them thoroughly, transfer the mixed material to the compaction mould arranged on the compaction pedestal.
  • iii) Give 75 blows on the top side of the specimen mix with a standard hammer (45cm, 4.86kg). Reverse the specimen and give 75 blows again. Take the mould with the specimen and cool it for a few minutes.
  • iv) Remove the specimen from the mould by gentle pushing. Mark the specimen and cure it at room temperature, overnight.
  • v) A series of specimens are prepared by a similar method with varying quantities of bitumen content, with an increment of 0.5% (3 specimens) or 1 bitumen content.
  • vi) Before testing of the mould, keep the mould in the water bath having a temperature of 60oC for half an hour.
  • vi) Check the stability of the mould on the Marshall stability apparatus.

Uses:

To Determination of Marshall Stability of Bituminous Mixture