ACE – Automatic Computerized Oedometer

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ACE - Automatic Computerized Oedometer

Standards

BS 1377:5, ASTM D2435, ASTM D3877, ASTM D4546, AASHTO T216, NF P94-090-1, NF P94-091, UNE 103-405, UNE 103-602

This test determines the rate and magnitude of consolidation of a soil specimen restrained laterally and subjected to a number of successive increments of vertical loads. In this automatic model, the incremental loading, in the load (stress) or swelling (strain) mode, is fully automatic for a practical and accurate test execution with more reliable test results. The ACE unit, the SHEARMATIC Automatic shear testing machine and AUTOTRIAX Automatic triaxial test systems, are the unique equipment for the complete automation of a CST (Consolidation, Shear, Triaxial) Soil Mechanics laboratory in the different configurations. See Automatic Soil Mechanics Laboratory.

The ACE, Automatic Computerized oedometer, consists of a small and compact load frame housing two coaxial pneumatic cylinders: the smallest one for low loads and the other for higher loads, with automatic switch off from one to the other when needed. The load is controlled by a high precision pneumatic servo-valve. Two analogue channels: one for the displacement transducer and the other for the load cell with closed loop feedback control. The test end can be programmed on a time or on a step bases. The software can control from a single PC, up to 60 ACE units enabling the operator to choose from single to multiple control.

Test parameters are previously specified by the operator and set in the ACE software. Test results are recorded and displayed in real time on the PC and calculation are performed automatically. The test data can be processed by one of the Geo-Analysis Templates conforming to the BS or ASTM Standards.

The frame can accept all standard consolidation cells: from 50.47 to 112.80 mm dia. Consolidation cells, Geo-Analysis templates and test software not included. See acc essories. PC not included.

Main Features

  • PC controlled fully automatic test execution
  • Pneumatic system for incremental consolidation and one-dimensional swell tests
  • Performance of 24 hours 7 days tests without interruption and greater through output of tests with a considerable cost decrease
  • To avoid the negative environmental discrepancies as operator errors, non-calibration etc.
  • 15 kN max. capacity, 10 mm travel displacement transducer
  • Real time data and graph display
  • Single ACE software controlling up to 60 units
  • Test management software supplied including calibration menu
  • High speed LAN network communication

Specifications

NG-ACE
Maximum Vertical Load 15 kN
Load Cell Cap 15 kN
Displacement Transducer 10 mm maximum travel
Maximum Air Pressure Supply 10 bar. If the air pressure line is not available in the laboratory, our Air compress model NG-D2015, 50L capacity may be used
Sample Dimensions From 50.47 to 112.8 mm diameter using our consolidation cells. See accessories
Software Can control up to 60 ACE units (not included, see accessories)
PC Connection LAN Connection to PC
Test Data Accuracy ±1%
Overall Dimensions 28 x 30 x 60 cm
Approximate Weight 25 kg

Consolidation Cells

To perform either standard or permeability testing:

ModelSpecimen Dia. x Height [mm]Specimen Area [cm2]Cell Dimension Dia. x Height [mm] Weight [kg] Calibration Disk
NG-WF0320 50.47 x 20 mm20 cm2139 x 74 mm1.3 kgNG-WF0320/9
NG-WF0321 63.50 x 20 mm31.67 cm2139 x 74 mm1.3 kgNG-WF0321/9
NG-WF0325 71.40 x 20 mm40 cm2139 x 74 mm1.3 kgNG-WF0325/9
NG-WF0326 75 x 20 mm44.16 cm2139 x 74 mm1.3 kgNG-WF0326/9
NG-WF0335 112.80 x 25 mm100 cm2200 x 74 mm3 kgNG-WF0335/9
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