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        HMP LFG

        The Light Drop-Weight Tester

        Conformingn to Engineering Code for soil and rock in road construction TP BF-StB Part 8.3 Issue 2003

           

        Determination of the soil bearing capacity and compaction
        quality of soils and non-cohesive subbases the dynamic plate
        load test employing the Light Drop-Weight tester is used in
        earth work and road construction to determine the soil bearing
        capacity and? the compaction quality of soil and non-cohesive
        subbases, as well as for soil improvement applications. The
        test method is suited for coarse-grain and mixed-grain soil
        shaving maximum grain size of 63mm. The test method may
        be used to determine the dynamic modulus of deformation of
        soil in the range Evd? =15...70MN/m2.

        Applications include
        ? Road construction
        ? Testing of pavement bedding
        ? Compaction monitoring in pipe trenches and cable ducts
        ? Quality assurance in canal construction
        ? Railway construction
        ? Foundation back fill

        PREPARE
        ? Preparing the plain ground
           
        ? Place the load plate on plain ground such that full-area support is ensured.
           
        ? Position the loading mechanism on the load plate.
           
        ? Interconnect the settlement, measuring instrument and the load plate by the measuring cable. Disengage shipping & handling lock.

        MEASURE
        ? Switch on the settlement measuring instrument.
           
        ? Arrange device in vertical position.
           
        ? Perform three impacts in succession.
           
        ? The settlement amplitudes S1, S2 and S3 are displayed on the screen.
           
        ? After the third measurement the mean settlement Sm and the computed Evd value are displayed.
           
        ? In addition, the device determines the path-to-speed ratio and settlement curve.











        EVALUATE

        ? via Thermal printer
           
        ? Printing of measured data from memory for documentation purposes at anytime and anyplace.
           
          The series of measured data comprises:
         
        ? Date
        ? Time
        ? Settlements
        ? Settling speed v
        ? Path-to-speed ratios/v
        ? Dynamic modulus of deformation Evd
        ? Settlement curve
         
         
        ? Up to 200 series may be stored.
           
          via Personal computer
         
          Apart from printing series of measured data by using a thermal printer, they may be also transferred to a PC
           
        ? Establish the connection between the PC and the settlement measuring instrument. Read in the series of measured values.
           
        ? Comfortable processing of the protocol by means of a special software program.
           
        .
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