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Determining The Marshall Stability of Bituminous Mixture

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This test is done to determine the Marshall stability of bituminous mixture as per ASTM D 1559. The principle of this test is that Marshall stability is the resistance to plastic flow of cylindrical specimens of a bituminous mixture loaded on the lateral surface. It is the load carrying capacity of the mix at 60oC and is measured in kg. The apparatus needed to determine Marshall stability of bituminous mixture is

i) Marshall stability apparatus
ii) Balance and water bath

the-marshall-stability-of-bituminous-mixture

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

Procedure to determine Marshall stability of bituminous mixture

i) Heat the weighed aggregates and the bitumen separately upto 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.

vii) Check the stability of the mould on the Marshall stability apparatus.

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REPORTING OF RESULTS
Plot % of bitumen content on the X-axis and stability in kg on the Y-axis to get maximum Marshall stability of the bitumen mix. A sample plot is given

determine-the-marshall-stability-of-bituminous-mixture

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Comments
  • raja April 5, 2013 at 12:05 am

    why the calibration of load proving ring is fixed to 6.4 for the 50kg capacity and for 100kg capacity proving ring 3.2????? can u plz reply the answer…….

  • Negash Abido December 23, 2016 at 1:59 am

    why 6.89 and 10.34 this standred use for 2.54 and 5.08 respectively?when we calculate the CBR value

  • Anand vivek March 23, 2017 at 2:27 am

    please e-mail me more civil engineering tests and ideas to improve the quality of work in highways, bridges and building works

  • anil m. godbole March 30, 2017 at 7:50 am

    i want to know the max recorded martial stability value till today for a cold mix as well as for a hot mix sample.please reply

  • Swapna k v May 21, 2017 at 9:04 am

    Can u please send me the detail lab report of marshal stability mix design

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