Bitumen Bituminous Mix Testing

INTRODUCTION

 

Used to maintain in water the Marshal specimens to be tested at 60⁰+ 1⁰  (Asphalt specimens) or 37.8⁰ + (Tar Specimens) as prescribed  by the specifications. The Same Water bath  can also be used for Penetration test, Stripping test or even soundness test of cement with the use of additional accessories. Available in different sizes and temperature control system.

 

 

(As Per IS : 1208 – 1978)

 INTRODUCTION

 This method is used for determining the ductility of bituminous materials by measuring  the elongation before breaking when two ends of a briquette specimen are pulled apart at a speed  of 50mm/min + 2.5mm/min at temperature of 27⁰C + 0.5⁰C.

 

GENERAL DESCRIPTION & SPECIFICATIONS:

 

The Machine consist of the following :

 

è                Stainless steel bath

è                Temperature controller (Thermostatic/Digital)

è                Immersion electric heater

è                Constant speed Pump cum stirrer

è                Carriage holding up to three standard briquette moulds

è                Electric motor with gear mechanism

è                Stainless steel scale and pointer

è                Control Panel

 

SPECIFICATIONS

 

The apparatus consists of water bath with a thermostatic heater and a circulating pump to maintain uniform water temperature.  One half of the briquette moulds is fixed in a fixed plate in the water bath, the other half of the briquette mould is fixed to a carrier which slides over a rotating  threaded shaft with a clutch. The motor and gears to rotate the shaft are housed in a cabinet fixed above the other end of the both. A pointer fixed to the carrier moves over. a scale graduated from 0-110 cm x 1mm fixed on the bath with "0" (Zero) of the scale towards the fixed plates side. The rotating shaft has 2 speeds of travel for the bracket, 5 cm/min. and 1cm/min. selected by a clutch. Water bath inside is of Stainless steel with insulation and a  water drain. A heater with thermostatic control is fitted. inside the water bath. Control switches for motor, stirrer, heater and indicator lamps are fitted to a control panel located at a convenient place on the water bath. Complete with three briquette moulds and one base plate. Working on 230 Volts, single phase, 50 cycles, AC.

 

OPTIONAL FITTINGS AT EXTRA COST

 

• Digital Temperature indicator cum controller (in place of Thermostatic control)
•  Digital display for Elongation
• The more advanced model with refrigeration system which ensures better temperature control in tropical conditions. The Machine is mounted on a steel stand with refrigeration unit at its base.
• Base Plate for mould.
• Mould for elastic recovery.

INTRODUCTION

 Used for specific gravity test by removing air voids from the Bitumen Mix. Very useful for other general laboratory tests where vacuum is required.

 

GENERAL DESCRIPTION & SPECIFICATIONS

 Complete with base, motor, pulley and belt. The pump mechanism is contained in a metal case with oil level and drain plug at base. Pump speed 450 RPM. Ultimate vacuum 0.01 mm/Hg. (Single stage). Complete with non-return valve, belt gauge and vacuum gauge with regulator.

 

Displacement : 50 Ltr./Min, Motor Rating : 0.25 HP Single Phase. To work on  230 V AC, 50 Hz. Single Phase. Supplied complete with filtering flask of 1000 / 2000 ml. Capacity with rubber cork and pressure pipe to carry out the test.

 OPTIONAL ACCESSORIES:

 

·        Air Ballast.

·        Moisture Trap

·        Hard Rubber Pipe of Required Length.

INTRODUCTION

 

Often, existing concrete structures will need to be examined and tested to ensure the concrete remains of adequate strength and durability. This test is used to determine the compressive strength of a concrete core, which has usually been extracted from an existing structure. The value of compressive strength can then be used in conjunction with other measured properties to assess the condition of the concrete.

 

Extraction of concrete cores, achieved by rotary drilling using a diamond tipped hollow barrel, serve as a means of taking a sample of concrete which can then be used to determine various physical properties, but most commonly compressive strength. 

Cores can generally be extracted from wherever access allows, and would include floor slabs, walls and columns. 10cm diameter cores, generally afford the minimum diameter required for a representative sample and require less reinstatement than larger diameter cores. 15cm diameter cores will generally give more representative samples than smaller diameters but require more reinstatement. 

GENERAL DESCRIPTION AND SPECIFICATIONS

 

AS PER LEAFLET.

 

OPTIONAL ACCESSORIES (AT EXTRA COST)

 

Diamond Impregnated core drills of required dia and length, Masonry core cutter, Grinding and Lapping Machine.

The following testing equipments are used to measure absolute viscosity of viscosity graded paving bitumen (IS:73:2006) at 60°C in accordance with IS:1206 (Part II) (similar to ASTM D 2171), which uses a vacuum capillary viscometer. It may please be noted that any other viscometer such as rotational viscometer cannot be used to measure the absolute viscosity at 60°C since the bitumen in non Newtonian in nature at this temperature. 

Complete Absolute Viscosity Testing Equipment conforming to IS: 1206 (Part II) Method for Testing Tar and Bitumen Materials: Determination of Absolute Viscosity with the following components: 

1. Constant Temperature Bath - A suitable bath for  immersion of at least 2 vacuum capillary viscometer tubes with a digital temperature controller. The accuracy of the temperature in the bath will be  ± 0.1°C throughout the bath. 

2. Vacuum System - Capable of maintaining a vacuum  within ± 0.05 cm of the desired level The system will consist of vacuum pump, moisture trap, vacuum regulator, bleed valve, all interconnecting tubing/piping, and any other accessory as needed to complete  the vacuum system.

3. Thermometer for Bath - Mercury in glass, range 37.8  to 82°C, and graduations of 0.2°C.

4. Timing Device - A stop watch or stop clock capable  of reading up to ½ second.

5. Cannon - Manning Vacuum Viscometers - With manufa- cturers' calibration certificate, viscometer holder  and silicone cork. Size 12 and Size 13 (one each)  [Size 12 is suitable for testing VG-10 and Size 13 is suitable for testing VG-20, VG-30, and    VG-40 bitumen.]

(As per is 1203-1978 ASTM D-35 automatic/ hand operated)

Introduction:

A depression made in the sample by a needle weight which is measured in tenths of a millimeter and expressed, as penetration number. A standard needle penetrated vertically under surcharge weight 50 gm into a sample under test temperature at 25°C for 5 second of duration. This test determine the consistency and thereby the grade of the bitumen.

General description & specification:

The apparatus is available in two versions, hand operated and electrically operated with automatic timer. The apparatus consist of a cast aluminum base with an iron stand on which moves an aluminum arm. A 6” dial is fixed on this arm and a brass chromium plated rod slide through the lower portion of the arm. A needle with weight is fitted to this rod. The dial is graduated from 0-400 in one tenth millimeter sub division. Supplied complete with adjustable needle holder, penetration needle, sample container, transfer dish and weight of 50 gm.

The automatic model is supplied with automatic digital timer and electrical arrangement to carryout the test without need of stop watch and with great ease and accuracy.

Automatic penetro meter with LVDT and auto timer can be supplied with indication of time and penetration in digital mode.

Optional accessories:

The following accessories an consumable are not part of the standard supply and are supplied at an extra cost.

·      Constant temperature water bath EIE 403/406.

·      Glass thermometer,

·      Electric hot plate.

·      Spare bitumen container 55 mm x  35 mm

·      Spare container 70 mm x 45 mm.

·      Enamel tray.

·      Stop watch mechanical / digital.

·      Spare penetration needle.

·      Spare weight 50 gm.

 

Note:

The above instrument with some modification can also be used for testing of grease/ soil/ food products and other similar materials for penetration test. The brass cone is used in place of needle for penetration. Variety of accessories are available for different application.

It is used to measure the resistance to plastic flow of cylindrical specimens of bituminous having mixture loaded on the lateral surface. For use with hot mixture contain in asphalt with specimen molds, base plates, Extension collars, Specimen extractor, Compaction hammer, breaking head assembly, Load transfer bar and loading unit, motorized with a uniform vertical movement of 5.08 cm/min. Fitted with a reversing switches and limit switch to restrict the travel. Capacity is 5000 kg. Suitable for operation on 220 Volts AC. With Digital Load indicator and LVDT
* It will be having digital display to measure the load up to 5000 Kg /50 KN* Facility to read in kg. and KN.* It will be supplied with load cell and LVDT to  measure load and flow on the same display panel.* Tare system to nullify initial load* The digital LCD display will retain the peak value  until it is cleared.* Digital display of  Flow value at maximum load  no need of separate watch on dial gauge* Auto cut off of electric current to motor on attaining peak load* Provision for default calibration (self calibration)* Load cell can also be calibrated using standard reference* Indication of rate of travel in inch/minute.* Panel cut out size 92 x 188 MMS.* With PC/printer interface with software fir direct  printout of calculated results (at extra cost)

 

• Hand Operated
• Electrically Operated

Hand Operated :- Also called Softening Point Apparatus. This apparatus is  meant  for determination  of  softening  point of  bituminous materials according to IP 58  and  IS 1205 Softening point is that temp. at  which the specimen  under test becomes  soft enough to allow a steel ball of specific  dimension to  fall  a required distance under test condition. The apparatus  consist  of  Glass  beaker of heat resistant  glass  of  internal dia 8.5 cm X 12 cm depth (approx.), Two steel balls each of 9.5mm dia, Two tapered brass rings, Two ball guides, ring stand and a hand stirrer. Hand Operated.

Electrically Operated :- Same as above but Electrically Operated.

Oven is designed to determine the the effect of heat & air on asphaltic materials (thin film test).

The unit is heavily insulated & has a double glass built in door for view inside temperature is controlled at 163'deg C #1'deg C. by means of a calibrated PID based DIGITAL TEMP. INDICATOR CONTROLLER.. inside platform rotated by external motor from 5 to 6 R.P.M. & 2 stainless steel pans are also provided to hold cups. (supplied without cups). Inner chamber made of stainless steel sheet of 304 grade & outer of mild steel sheet stoving painted. To work on 230 volts, AC 50 Hz supply.