DDC Geo-Technical Laboratory

DDC Geo-Technical Laboratory

SOILS AND MATERIALS TESTING LABORATORY

Field Exploration and Testing:
DDC has several units of field exploratory and testing equipment such as drilling apparatus for SPT, DCP, SCP, hand vane shear, torvane shear, pocket penetrometer, micro cover meter etc. to perform borings, sampling and various testing in accordance with ASTM/BS standard and also to collect representative disturbed/ undisturbed soil samples of weak, compressible and potentially expansive soil layers. For field exploration and testing about 25 experienced engineers, drillers, supervisors and helpers are employed full time.
Laboratory Facilities:
DDC has about 3000 Sft. area of laboratory building with well expensive type of equipment such as triaxial shear, direct shear, unconfined compression, consolidation, sand equivalent and others for testing of soil classification, compaction and shear strength characteristics etc. Also the firm has a well equipped construction materials testing facilities for compressive strength of concrete and cement, AIV, ACV, flakyness index, slump of concrete, inplace strength test of concrete, checking the existing reinforcement and covering and others etc. run by well trained and experienced professionals and technicians. The laboratory can organize planning and control by the soil and construction material testing programmes to suit the nature of any project or study.

Thirty professionals and technicians in the central laboratory perform the laboratory tests of geotechnical engineering on the disturbed and undisturbed soil samples and prepare the geotechnical engineering report with recommendations for foundation design based on the results of the field and laboratory tests. For computation and reporting purposes the laboratory use the following computer software.

  • General laboratory test programme
  • LL & PL test programme
  • Sieve test-particle size distribution programme
  • Compaction test programme
  • Triaxial test programme
  • Consolidation test programme
  • Unconfined compression test programme
  • California bearing ratio test programme
  • Direct shear test programme

Soils and Materials Testing Equipment List:

Sl. No. Name of Equipment Purpose Quantity(No.)
a)Field Equipment
1 Standard Penetration Test (SPT) Equipment with all Accessories To collect disturbed and undisturbed soil samples and to measure SPT value (N-value) 5
2 Hand Auger (3″ and 4″ dia) To collect soil samples 8
3 Field Density Test Equipment by Core Cutter Method To measure density in the field for cohesive soil 8
4 Field Density Test Equipment by Sand Replacement Method To measure density in the field for cohesion less soil 6
5 Dynamic Cone Penetrometer (DCP) To measure field CBR 12
6 Non-destructive Concrete Compressive Strength Testing Hammer (Rebound method) To measure compressive strength of concrete in-place 4
7 Speedy Moisture Tester To measure moisture content of soils quickly 10
8 Field Scale To measure weight of soils 6
9 Proctor Penetrometer To measure penetration resistance and degree of compaction 5
10 Torvane Shear Tester To measure shear strength of cohesive soils in field 3
11 Pocket Penetrometer To measure unconfined compressive strength of cohesive soils in field 3
12 Soil Resistance Meter (4-pin) To measure resistivity of soils required for foundation soils of power stations 1
13 Eley Volumeter foundation soils of power stations 2
14 PILCON Hand Vane Shear Tester To measure in-place shear strength of cohesive soils in the field 1
15 MERLIN Low-Cost Road Roughness Measuring Machine To measure road roughness 1
16 Precision Sound Level Meter To measure noise 1
17 Benkelman Beam Apparatus To measure deflection of existing road 2
b) Laboratory Testing Equipment
Soil Testing Equipment
1 Unconfined Compressive Strength Test Apparatus To measure unconfined compressive strength of cohesive soils 4
2 Triaxial Compression Test Machine with Constant Pressure Device To measure shear strength of soils under different confining pressures and conditions 1
3 Load Frame (power driven) To measure California bearing ratio (CBR) of soils and aggregates 1
4 One Dimensional Consolidation Test Machine To determine tlement characteristics of soils 4
5 Atterberg Limit Test Apparatus To determine liquid limit and plastic limit of soils 6
6 Sieve Shaker with Electric Motor Required for grain size analysis 4
7 Soil Sieve (8″ dia) Required for grain size analysis 8
8 Soil Sieve (12″ dia) Required for grain size analysis 6
9 Load Frame (hand operated) To measure strength of soils and aggregates 1
10 Direct Shear Test Device To measure shearing angle and cohesion of soils 1
11 Graduated Cylinder 1000 ml Capacity Required for hydrometer test of soils 24
12 Hydrometer To determine grain size distribution of soils 4
13 Mechanical Stirrer To stir soil-water suspension for hydrometer test of soils 1
14 Hydraulic Sample Extruder (Vertical) To eject soil sample from tubes and compaction moulds 1
15 Hand Operated Sample Extruder (Horizontal) To eject soil sample from tubes 1
16 Compaction Mould 4″ dia (Standard Proctor Mould) To determine maximum dry density (MDD) and optimum moisture content (OMC) of soils 20
17 Compaction Mould 6″ dia (Modified Proctor Mould) To determine maximum dry density (MDD) and optimum moisture content (OMC) of soils 12
18 Standard Compaction Hammer (5.5 lbs. and 2″ drop) Used for determination of MDD & OMC by standard compaction method 12
19 Modified Compaction Hammer (10 lbs. and 8” drop) Used for determination of MDD & OMC by modified compaction method 12
20 CBR Mould (ASTM/BS Standard) To prepare specimen for determination of CBR 40
21 Swell Measurement Apparatus for CBR Test To measure swelling of soil in the CBR mould 12
22 Kango Vibratory Compaction Apparatus To determine moisture – dry density relationship of granular materials 2
23 Sand Equivalent Test Apparatus with Electrical Shaker To determine plastic fines in the graded aggregates and soils 1
24 Digital Temperature Meter (Range: -30 to +750oC) To measure temperature 1
25 Digital Temperature Meter (Range: -30 to +750oC) To measure temperature 1
26 Specific Gravity Test Apparatus To determine specific gravity of soil 6
Concrete and Concrete Materials Test Equipment
1 Concrete Testing Machine 2,50,000 lbs. capacity To measure compressive strength of concrete cylinders/ cubes 6
2 Concrete Cylinder Mould 6″x12″ (steel) To prepare concrete cylinder for compressive strength 60
3 Concrete Cylinder Mould 6″x12″ (plastic) To prepare concrete cylinder for compressive strength 40
4 6″x6″ Cube Mould To prepare concrete cube for compressive strength 20
5 Cylinder Capper with Plates To level uneven surface of cylinder 5
6 Micro Covermeter Used for non-destructive test of hardened concrete to measure size and spacing of high tensile and mild steel bars 1
7 K-Slump To measure slump of fresh concrete 1
8 Rectangular Capping Mould To level uneven surface of concrete cylinder 2
9 Slump Cone To measure slump of fresh concrete 8
10 Unit Weight Bucket (small and big) To measure unit weight of aggregates 6
11 2″ Cement Cube Mould To prepare cement mortar cube for quality test of cement 4
12 Vicat Needle Apparatus To measure consistency and ting time of cement 2
13 Air Pressure Meter To measure air content of fresh concrete 2
14 Concrete Air Indicator Kit To measure air content in fresh concrete 2
15 Warmer Pot To warm capping compound 5
16 Sample Divider To divide coarse sample accurately 1
17 Sieve (12″ dia) For gradation of coarse aggregates 6
18 AIV Testing Machine To measure aggregate impact value 2
19 Aggregate Crushing Value Apparatus (ACV) To determine aggregate crushing value 2
20 Flakiness Index Gauge To determine flakiness index of coarse aggregates 2

General Laboratory Wares of different Quantity and Size

  • Precision Electronic Balance
  • Table Balance
  • Table Balance
  • Straightedge
  • Sprit Level
  • Chisel
  • Tape
  • Shovel
  • Soil Colour Chart
  • Soil Classification Chart
  • Timer
  • Moisture Content Containers
  • Solution Balance
  • Cent-o-Gram Balance
  • Wrench
  • Spanner
  • Sample Tray (different size)
  • Porks
  • Calculator
  • Label
  • Stop Clock
  • Slide with Cassette
  • Graduated Cylinder
  • Scale
  • Drying Oven (Electrical)
  • Tent
  • Laboratory Tong
  • Slide Caliper
  • Steel Rule
  • Spatula
  • Beaker
  • Spacer (square/round)
  • Triple Beam Balance
  • Mortar and Pastle
  • Micrometer
  • Umbrella
  • Spade
  • Glass Bottle
  • Glass Bottle
  • Dial Gauge
  • Screw Driver
  • Knife etc.

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