IOWA BEARING VALUE APPARATUS: (Hand Operated)

Introduction:

• For determining the supporting strength of soil and soil aggregate mixtures which pass the 2 mm and do not contain more than 10% sand size material. The results obtained by this AASHO and CBR Test.

The salient features of this apparatus are:-

• The moulds used in this test are very small hence very smaller samples are required which is a great advantage when a large number of tests have to be carried out with a limited quantity of soil available. Also when large quantities of soil are available, fresh samples can be used for each test.
• Time required this test is very much less than C.B.R. test and thus more number of tests can be carried out.

General Description and Specifications:

• Load frame:  mechanical, hand operated capacity 5000 kg.
• Cylinder Mould: brass, internal diameter 50 mm x 125 mm high approx.
• Cylinder Mould: steel, internal diameter 50 mm x 125 mm high approx. Detachable collar approx. 50 mm in height.
• Base: cylinder diameter 50 mm x 75 mm high. Temporary support (Split collars held on a pair of tongs) to hold the mould on the bottom of the base.
• Frame of two steel rods: a base plate and a cross member having a semi-circular notch which guides the hammer during compaction. It has a level for forcing the mould to the bottom of the base after molding.
• Hammer: 2.6 kg with a 310 mm drop.
• Hammer: 4.89 kg with 310 mm drop.
• Penetration rod: 16 mm diameter with arrangement for mounting dial gauge. Guiding device which fits over the mould during testing and maintains the penetration rod in a vertical position.
• Soaking frame: with perforated base and dial gauge holder.
• Annular weight: 550 gm with perforated base and spacer, Ejecting plunger.
• Proving ring:  high sensitivity, capacity 1000 kg with calibration chart and carrying case. Dial gauge graduated 0.0002 mm, range 5 mm.

IOWA BEARING VALUE APPARATUS (MOTORISED)

General Description and Specifications: Same as above but supplied with a bench mounting load frame motorised to give a constant strain rate of 1.25 mm per minute.