Soil and Civil Test Equipment

As Entrainment of air in limited percentage improves durability of concrete and very low percentages deteriorate it, measurement of air entrapped in freshly mixed concrete becomes important. The use of chemical additives to increase workability of concrete requires an air content check to be made. Air Entertainment meters are used to determine air entertained in freshly mixed concrete by pressure method.

The apparatus consists of a pressure tight flanged cylindrical measuring bowl of 0.007 cubic meter capacity for maximum size of aggregate 50mm. The bowl is fitted with a removable flanged conical cover assembly with the help of a seal. The conical cover has an air valve and a petcock for bleeding off the water. A transparent cylindrical stand pipe which is graduated in air content is fixed to the conical cover assembly. Pressure is applied to the specimen with the help of a pressure bulb and the pressure is recorded on the pressure gauge which is mounted on the stand pipe. The whole assembly is mounted on a flat base. The instrument is supplied complete with one each following accessories. Calibration cylinder with spring clamp, Trowel, Tamping rod, Straight edge, Rubber mallet and measure.

The Laboratory Cement Autoclave is suitable for conducting accelerated soundness test on Cement or the Autoclave expansion test. The Equipment meets the requirement of IS: 4031(Part-3)

The Equipment consists of a Stainless Steel/Mild Steel Pressure Vessel with insulated outer shell fabricated. The Pressure inside the vessel is controlled through a Pressure gauge and spring-loaded safety valve for control of Heater unit.

Specification:

 

Compression Testing Machine 2000 KN (200 Tons) Capacity (Four Pillar Model) Electrically Operated fitted with dual display i.e. load gauge 0-2000 KN x 10 KN/ Division and Digital Load Indicator 2000 KN x 1 KN/ Division. The micro switch fitted in load gauge and relay contact in digital load indicator to protect the machine from overloading. The machine is suitable for operation on 440V, 3-phase, AC supply.

The design of concrete mix is aimed at maximum durability for the conditions prevailing at the site where it is to be used. Ability to resist the flow of water through is one of the important durability characteristics. The permeability is determined on cement, mortar and concrete specimens, either cast in the laboratory or obtained by cutting out cores from existing structures.

Electrically operated to give the following 12 ratesor strains. 1.25, 0.625, 0.25, 0.125, 0.05, 0.025, 0.01, 0.005, 0.002, 0.001,0.0004 and 0.0002 mm/min. The apparatus is suitable for operation on 230 voltssingle phase A.C. Supply.
For determination of the direct shear strength of soils on specimen size 60 mmx 60 mm x 25 mm.

Specifications: The apparatuscomprises of the following:

Loading Unit: Supplied withload yoke with direct and lever system for applying load. Normal stresscapacity 8 kg/sq. cm. Load is applied either directly or through a counterbalanced detachable lever. Provision is made for the load to be applied eitherthrough a steel ball recessed in the loading pad or direct through a boss onthe pre calibrated loading yoke, the loading unit is provided with V strips androller strips for frictionless movement of shear box housing.

Shear Box Assembly: ComprisingDirect Shear box in two halves for a square specimen size 60 x 60 x 25 mm onepair of plain gripper plates, one pair of perforated gripper plates, one pairof porous stones, one top loading pad. Shear box housing: Accommodates theDirect Shear Box assembly. Complete with two ball roller strips.