Test Procedure of ASTM D – 06 Standard Test: The apparatus for the Marshall Stability test consists of the following: Specimen mould assembly comprising. ASTM DStandard Test Method for Marshall Stability and Flow of Bituminous Mixtures_建筑/土木_工程科技_专业资料。ASTM的沥青混合. Preparation of Marshall Specimens (from bituminous mixes). ASTM D PROCEDURE (continued) e. Specimens conditioned to specified temperature.
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Standard Test Method f ASTM D standar A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval. This test method is for use with dense graded ast, mixtures prepared with asphalt cement modi?
The values given in parentheses are for information only. It e6927 the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. In addition, Marshall stability and?
ASTM D6927 – 15
The Marshall Test can be conducted with two different types of equipment: However, depending on the composition and behavior of the mixture, a less de? As an alternative method, Marshall stability can also be de? The magnitude of Marshall Stability varies with aggregate type and grading and bitumen type, grade and amount. Various agencies have criteria for Marshall stability.
Marshall Stability Test Procedure – ASTM D – 06 Standard Test Method
In both types of failure, the Marshall? As shown in Fig. Current edition approved June 1, Originally approved in Last previous edition approved in as D — There is no ideal value but there are acceptable limits. For the purpose of mix design, Marshall stability and? The binder content range is generally selected on the basis of experience and historical testing data of the component materials, but may involve trial and error to include the desirable range of mix properties.
Dense-graded mixtures will generally show a peak in stability within the range of binder contents tested. The above test properties may also be weighted differently to re? In addition, a mixture design may be required to meet minimum voids in the mineral aggregate based on nominal maximum aggregate size in the mixture.
This includes mixing efficiency and aging. The source of the variation should be resolved and the problem corrected. Other types of compaction may cause specimens to have different stress strain characteristics than specimens prepared by Marshall impact compaction. However, these results may not compare with results from laboratory-prepared specimens and shall not be used for speci?
One source of error in testing? Such conditions can create stress concentrations in loading and low Marshall stability.
The lower segment shall be mounted on a base having two perpendicular guide rods or posts minimum Guide sleeves in the upper segment shall 3 direct the two segments together without appreciable binding or loose motion on the guide rods.
A circular testing head with an inside bevel having dimensions other than speci? The design in Fig. The 20 kN lb ring shall have a minimum sensitivity of 50 N 10 lb. The dial indicator should be graduated in increments of 0. The ring dynamometer should be attached to the testing frame see ring holding bar, Fig.
The ring dynamometer assembly may be ast with a load cell connected to a loaddeformation recorder or computer provided capacity and sensitivity meet r6927 requirements. NOTE 1—A higher capacity ring dynamometer may be required for high-stability mixes. These include mixes with harsh, crushed aggregate and dense gradation, as well as mixes made with very stiff binders. The activating pin of the gage shall slide inside the guide sleeve with minimal friction and the guide sleeve shall slide freely over the guide post see Fig.
These points of frictional resistance shall be checked before tests. These alternate devices should be capable of indicating or displaying? These devices d69927 be designed to measure and record the same relative movement between the top of the guide post and the upper breaking head. The bath shall be thermostatically controlled so as to maintain the speci? The tank shall have a perforated false bottom or be equipped with a shelf for supporting specimens 50 mm 2 in.
Asmt of guide system atm but must be appreciably free of both play and binding. One test for binding is to lift or lower head by a single guide bushing. The specimens should have the same aggregate type, quality, and grading; the same mineral? In addition, the specimens should have the same preparation, that is, temperatures, cooling, and compaction.
During cooling they should be placed on a smooth,? Testing shall be completed within 24 h after compaction. Bring specimens prepared with asphalt cement, tar, or tar-rubber to the speci? Bring specimens prepared with cutback asphalt to temperature by placing them in the air bath for to min. NOTE 2—Temperature variation will affect test results.
A dummy specimen with a thermocouple can be used to monitor temperature. Lubricate guide rods so astk the upper test head segment slides freely over them. If a water bath is used, wipe excess water from the inside of the testing head segments.
Place the upper segment of the testing head on the specimen, and place the complete assembly in position in the loading machine. If used, place the? The Marshall 6 Stability is de? This procedure may require two people to conduct the test and record the data, depending on the type of equipment and the arrangement of dial indicators. Depending on chart speed, Marshall? Specimens within the thickness tolerance may be corrected based on specimen volume or thickness. However, results with larger corrections should be used with caution.
Correction factors correlation ratios are given in Table 1. The correlation ratio is used in the following manner. D — 05 TABLE 1 Stability D627 FactorsA Volume of Specimen, cm3B to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to to A 8. Precision Correlation Ratio 5. One test result is considered to be the average of tests on three specimens.
The asym acceptable range of two test results between-laboratories indicates that this test should not be used for material acceptance programs that compare between-laboratory results. One test result is considered to be the average of three samples.
B Volume-thickness relationship is d6972 on a specimen diameter of 4 in. They also represent dense graded mixtures with limestone and gravel aggregates, using the peak method for determining stability and? Different asphalts were also used. These results do not qstm application of the density limitation in Test Method D The coefficients of variation and acceptable range of two results are the average of the four sets of pro?
This data involved test results from 6d927 and laboratories testing mm 4-in. These results are given in percent so that they apply to various levels of Marshall stability and? Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.
This standard is subject to revision at any d627 by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. Individual reprints single or multiple copies qstm this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.