voids analysis and stability – flow test. Strength is measured in terms of the ‘ Marshall’s Stability’ of the mix following the specification ASTM D (), which. To design the Asphalt concrete mix using Marshall method. .. Max. Min. Max. Marshall specimens. (ASTM D ). No. of comp. Blows, each end of specimen. (ASTM – D – & MS-2) The original Marshall method is applicable only to hot-mix asphalt paving mixtures containing aggregates with.
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In case the mix designed does not fulfill any one or more of the design requirements, the gradation of the aggregates or filler content or bitumen content or combination of these are altered and the design tests are repeated till all the requirements are simultaneously fulfilled.
Marshalo water baths are available in two versions: The EN covering the Determination of the indirect tensile strength of bituminous mixtures, prescribe a water The highest possible Marshall stability values in the mix should be aimed at consistent with the other four requirements mentioned above.
Automatic Marshall Stability Test Machine
This offset is subtracted from the displacement value at peak point and called as flow. The user can see 9 of the results on the same screen for easy comparision. The report includes all results for 9 samples.
Marzhall Pro enables the users to display current memory usage and test results with its advanced data and memory management interface.
The software accepts specimen diameter and height as an input parameter. This will normally be about gm 2.
It automatically calculates correction factor coming from the standards with respect to specimen thickness. Control Unit offers many additional unique features. The display also show the travel direction d159 lower platen. The specific gravity and apparent specific gravity values of the different aggregates, filler and bitumen used are determined first.
Motor, worm gear system and Utouch Pro Control Unit are housed within the base unit. Newer Post Older Post Home.
ASTM D, Test equipment Controls
Mould holder provided consisting of spring tension device designed to hold compaction mould centered in place on compaction pedestal. The compaction temperature may be 0 to 0 C.
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The software includes control of machine, acquisition of load and displacement data, saving them and generating reports. U-Touch Pro TFT can simultaneously display machine status, test values, warnings during operation and test graphs in real time. A limit switch is provided for the bottom limit of travel. The machine is supplied complete with load ring, 30 kN cap.
dd1559 Let the bitumen contents corresponding to maximum density be B1, corresponding to maximum stability be B2 and that corresponding to the specified voids content Va 4.
The main advantage of this machine is its high flexibility as a general purpose testing system, ensured by its generous dimensions which allow the placement of an Least count of 0.
The compacted specimen should have a thickness of The required quantity of the mix is taken so as to produce a compacted bituminous mix specimen of thickness Each test requires a list of accessories depending on the type of test and on the reference standard. Determination of Optimum Bitumen Content: No external transducer is required for displacement measurement. All parts can be ordered individually. Three specimens should be prepared at each trial bitumen content, which may be varied at 0.
This important feature also permit to perform the speed calibration of the machine by micrometric manual adjustment by the operator. General lab – Water baths: The load jack, DC motor and controls are housed in a specially designed base cabinet. Home Products Search results Results for: All moving parts are protected with safety guard, which stop automatically the compactor when opened and the control panel is fit with an emergency stop red Furthermore, the test stroke can be set at the beginning of the test with automatic stop, avoiding to overload the machine and the specimen, thus assuring the operator safety.
Machine is capable of reversing its movement downward also. An important feature is provided by the processing unit that controls the speed in a closed-loop modezstm speed calibrations and tension fluctuation effects.
The machine can be hand operated by a lateral hand wheel for calibration purposes. The specimen are taken out one by one, placed in the Marshall test head and the Marshall Stability value maximum load carried in kg. Test reports can be instantly printed using an optional thermal printer. The aggregates and filler are mixed together in the desired proportion as per the design requirements and fulfilling the specified gradation.