Concrete Testing Equipments

INTRODUCTION :

The digital compression testing machine has been designed to meet the need for a simple, economic and reliable means to test concrete for its compressive strength. The design expressive of simplicity, both of construction and operation, makes the machine easy to use and maintain. The unit is compact, making it useful for site and Laboratory applications. The digital machines are provided with a pace rate controller, to enable maintain a constant of loading.

FEATURES :

·                     High stability four column load frame

·               Each frame tested for stability and alignment to avoid tension failure during a test and to ensure centre loading

·               Standard Platens for 3 X 6”/ 4 X 8” and 6 X 12” cylinders included.

·              A precise large diameter spherical upper platen for optimum results

·             Variety of optional accessories for cubes, blocks, bricks and flexure test available

·           Motorized hydraulic power pack or pumping unit with rapid approach and automatic over load protection

·                     Comes standard with safety Guards on all four sides.

The Complete unit comprises a Loading Unit which is of fully welded or two pillar model construction having a cross-head with a spherical seated platen. The lower platen is attached to the top of the piston. The Loading capacity is of 2000 KN, Cubes up to 200 mm & Cylinders up to 150 mm Dia X 300 mm Height can be tested using the appropriate spacers.

Pumping Unit with choice of compact power pack attached closely to the loading unit or separate hydraulic pumping unit, attached to the loading unit by high pressure hydraulic flexible hose pipe. The pump facilitates rapid approach of the platens for daylight closure and also provides comprehensive control over the application of load. A control valve provides fine control over the loading rate for accurate pacing.

Maximum load is held and retained for approx. 15 min, unless cancelled, using the panel mounted reset switch. Pace rate set for running the test can be maintained manually.

Model With digital Readout and pace rate Controller

A concrete mixer is a device that homogeneously combines cement, aggregate such as sand or gravel, and water to form concrete. The mixer uses a revolving drum to mix the components. Uniform and thoroughly mixed batches can be produced in field or Laboratory. Inevitable for mix design formulation.

General Description and Specifications

The Concrete Mixers are available in two versions. For Laboratory or field use. The field models are hand operated. This portable concrete mixer has rubber tyred wheels and a towing tongue so that it can be towed and moved around by hand. Its rotation is powered by single phase electric motor or by hand . The lever allows the concrete to be tipped into a wheel barrow or mixing pan. The driving shaft is mounted on sealed ball bearing. The counter balanced drum swivels and tilt 3600 for easy and complete discharge.

Drum Capacity   :    3 cubic feet approx

Drum Material    :   Cast iron or mild steel

Mixer Capacity  :   2 cubic feet approx

Drum Rotation  :   20-22

Motor Power     :   0.5 HP single phase AC supply/  hand operation

Optional Accessories

Wheel Barrow, Mixing Pan, Concrete Scoop.

INTRODUCTION

This test is used to determine the elapsed time between batching of a concrete sample and when it is deemed by standard methods to have set. The method involves measuring the penetration resistance of a test sample, which has had coarse particles removed at periodic intervals.  It is particularly useful, in determining the effect on setting time of admixtures in the concrete, where these may have been introduced specifically to increase the setting time. 

GENERAL DESCRIPTION AND SPECIFICATIONS

It consists of cylindrical spring housing with a plunger attached to the top of the spring. Penetration needle is attached to the other end of the spring housing. The plunger is graduated in 1 kg divisions, to a maximum capacity of 60kg, which can be read with respect to the top end of the spring housing. A set of six needle points with areas of 645, 323, 161, 65, 32 and 16mm2 are provided. Supplied complete in a wooden carrying case.

POCKET PENETOMETER

Consists of a needle having face area 3/10 sq.cm. and graduated at a distance of 25mm. The needles point is an integral part of barrel which houses a calibrated spring. The spring is confined in a sleeve. The resistance offered by the concrete mortar is shown on the direct reading scale with a marker ring which holds its position when released. Scale range is 0-50 kg/cm2 when the penetration resistance reaches a value of 35kg/cm2 the concrete is assumed initially set. Supplied complete in a leather carrying case. AS PER ASTM C-403

INTRODUCTION

Cubes of fresh concrete are made to test a variety of properties on the eventually cured and hardened concrete. Fresh concrete is subjected to a standard compaction regime in the cube mould and is then normally initially cured under specific laboratory conditions. The moulds are manufactured, subject to tight dimensional, hardness, square ness and surface finish requirements. 

GENERAL DESCRIPTION AND SPECIFICATIONS

Complete with base plate. The faces of the mould are machined flat to +/- 0.02mm accuracy and finished to within +/- 0.2mm of specified dimensions.  Material for construction of moulds is Cast Iron or Mild steel. The moulds are stout enough to prevent distortion and facilitate the removal of the moulded specimen without damage. The Moulds are so machined that when they are assembled ready for use, the dimensions and internal faces are accurate within the specified limits. Internal faces of the moulds are smooth.

The base plate is attached to the mould by cleats .The parts of the mould, when assembled, are positively and rigidly held together during filling, subsequent handling and vibration where applicable.

SIZES AVAILABLE : 50MM/ 100MM/ 150MM

OPTIONAL ACCESSORIES

SPANNER FOR DEMOULDING AND MOULDING,

TAMPING ROD WITH SAUQRE FACE.

CUBE MOULD 7.06 CMS(FOR CEMENT MORTAR)

As per IS : 10086-1982, The cube mould is so constructed so as to facilitate separation into two parts. The mass of the mould together with the base plate will be 2.8 +/- 0.2 kg. Material for construction of these moulds is mild steel.

BEAM MOULDS

For casting concrete specimens for flexural tests. The mould is made of 4 plates assembled together. Each mould with base plate, made of Mild Steel. Faced are machined flat to +/-0.2mm and finished in size to 0.2mm. AS PER IS: 516

For compaction of concrete cube cylinders. The table deck size has stops along its edges to prevent molds from walking off the table during operation. A cross arm adjustable on a vertical rod at the center of the table is provided to hold the molds while operating the table. The variable pitch pulley arrangement permits the frequency to be varied sleeplessly between maximum of 3600 vibrations down to 2600 vibrations per minute. A speed regulation handle is provided for increasing or decreasing the frequency. The vibrator is mounted on cushioned steel vibrating deck. A switch is provided for starting the motor. Operation on 440 V, three phase, A. C. Supply.  

Relevant standard : is : 2514