Engineering Materials Laboratory was established as an integrated arm of TSERL in the pre-independence days to carry out the Basic and Applied Research Work in the field of concrete technology besides the quality control check and testing of construction materials to verify conformity with relevant standards or other specific requirements and catering to the technical needs of state & central government organizations and private organizations.
The materials which are tested are cement, aggregates, rocks, steel reinforcement, bricks, A.C. sheets, Tar and Bitumen, FRC Man Hole covers etc.
This laboratory also deals with
2. CTM – 3000KN Capacity – Digital controlled –
To find the compressive strength of materials.
3. Pundit-Ultra Sonic testing Instrument –
Used for the Non Destructive testing on concrete & to find concrete quality (thickness or hardness) through high frequency sound waves.
4. Silver Schmidt electronic concrete test hammer (N Type ) –
Used for the Non Destructive testing on concrete & to find strength of concrete on surface
5. Pullout test apparatus for rock, 250 KN cap –
For conducting anchor pull-out test in rock and the evaluation of bond strength between reinforcement and grout concrete or grout concrete and rock.
6. PS 35 Ferro detector –
To locate rebar, Copper and aluminium pipes before drilling holes into concrete.
7. Vicat apparatus –
To determine the normal consistency/standard consistency and initial/final setting time of cements and mortar pastes.
8. Blaines air permeability apparatus–
To determine the fineness or surface area per gram of cement.
9. Laboratory cement autoclave –
To determine the accelerated soundness tests on cement.
10. Vibration Machine (H.F. Vibrator) -
For proper compaction of cement concrete cubes.
11. 70.6 mm size cube steel moulds with base plate- IS:10080-1982
For casting of cement cubes, to determine the compressive strength of cement.
12. 150 mm size cube Cast Iron moulds with base plate- IS:10086-1982
For casting of concrete cubes, to determine the compressive/flexural strength of concrete.
13. Length comparator -
To determine the initial drying shrinkage,moisture movement of cement concrete or cement sample
14. Standard Coarse Sieve Set, 450 mm. diameter G.I.Sheet Frame with following aperture sizes including Pan & Lid Confirming to IS 460(part1)-1985 -80mm, 63mm, 40mm,31.5mm,25mm, 20mm, 16mm, 12.5mm, 10mm, 6.3mm,4.75mm. Used to characterize and classify coarse aggregate.
15. Standard Fine sieve set, 20 cm. diameter made of Spun Brass Frame & wire cloth sieving media with following aperture sizes including Pan & Lid Confirming to IS 460(part1)-1985. - 10mm, 4.75mm, 2.36mm, 1.70 micron, 1.18micron, 600micron, 300micron, 150micron. – Used to characterize and classify fine aggregate.
16. Sieve shaker for 20 cm. diameter Brass sieves with timer –
For sieving of fine aggregate, to determine the zone the of aggregate (Particle size distribution)
17. Crushing Value apparatus –
Used for measuring resistance of an aggregate to crushing under gradually applied compressive load.
18. Aggregate impact tester with blow counter –
To determine the aggregate impact value under suddenly applied load.
19. Los Angles Abrasion testing machine with motor –
To determine the resistance to wear off small size coarse aggregates by abrasion and impact in a drum with an abrasive charge of steel balls.
20. Jaw crusher with discharge opening adjustment range 3-10mm –
To crush the stone upto 45mm.
21. Concrete penetrometer -
To determine the setting time of mortar fraction of fresh concrete mixes
22. Air entrainment meter –
To find the amount of air content in the freshly mixed Cement/Concrete.
23. Vibrating Table (2m X 1 m) –
For proper compaction of cement concrete cubes to determine compressive strength
24. Concrete Mixer – Pan type – 80 Litres capacity.
For mixing of small quantities of concrete used in preparation of concrete cubes
25. Concrete permeability apparatus – 3 Cell model – 15 cm. size cubes -
To determine the permeability of cement mortar and concrete specimens, either cast in the laboratory or obtained by cutting out cores from field
26. Flash point & Fire point – Pensky Marten’s apparatus –
To determine the flash & fire point of bitumen
27. Standard viscometer
For determine the viscosity of cut back bitumen
28. Softening point -Ring & ball apparatus -
To determine the temperature at which a sample of bituminous material loaded by a 9.5mm dia steel ball, drops a specified distance when heated under specified conditions.
29. Ductility testing machine –
To determine the elongation of a binder specimen before failure for bituminous materials.
30. Lab hot air oven – Electrically operated on 230 V, 3 shelves, automatic with digital display (0o Cto 150o C) size 450*450*450mm –
For drying of testing samples i.e., fine aggregate & coarse aggregate and core samples.
31. Electronic Balance(Rechargeable), 600g Capacity, 0.01g Accuracy –
Weighing of samples
32. Electronic Balance(Rechargeable), 5Kg Capacity, 0.5g Accuracy –
Weighing of samples
33. Electronic Balance(Rechargeable), 30Kg Capacity, 5g Accuracy-
Weighing of samples
34. Electronic Balance(Rechargeable), 300Kg Capacity, 50g Accuracy –
Weighing of samples
- Cement concrete and cement mortar mix design to ensure effective and economical use of locally available materials
- Core extraction of concrete structures for the evaluation of strength
- Pull out test of anchor rods in tunnels and rock foundations to assess the bond strength
- Conducting all laboratory tests on engineering materials like cement, aggregates, steel, concrete etc.
III. TESTS ON ENGINEERING MATERIALS
I. TESTS ON CEMENT
- Standard consistency of cement – IS : 4031 : 1988 (Part –IV )
- Compressive strength of cement – Sampling as per IS:3535 :1986, Testing Procedure as per IS: 4031 :1988 (Part – VI )
- Setting times of cement - IS : 4031 : 1988 (Part –V )
- Specific gravity of cement –IS : 4031 - 1980
- Fineness of cement - IS : 4031 : 1988 (Part –II )
- Soundness of Cement - IS : 4031 : 1988 (Part –III )
- Sieve analysis of fine aggregate – Procedure as per IS:2386 : 1963 (Part – I), Specifications as per IS: 383 - 2016
- Specific gravity and water absorption of fine aggregate – Procedure as per IS:2386 : 1963 (Part – III), Specifications as per IS: 383 - 2016
- Bulk density and voids of fine aggregate – Procedure as per IS:2386 : 1963 (Part – III), Specifications as per IS: 383 - 2016
- Materials finer that 75 microns - Procedure as per IS: 2386 – Part I (1963) , Specifications as per IS: 383 - 2016
- Sieve analysis of coarse aggregate - Procedure as per IS:2386 : 1963 (Part – I), Specifications as per IS: 383 - 2016
- Specific gravity and water absorption of coarse aggregate – Procedure as per IS:2386 : 1963 (Part – III), Specifications as per IS: 383 - 2016
- Bulk density and voids of coarse aggregate – Procedure as per IS:2386 : 1963 (Part – III), Specifications as per IS: 383 - 2016
- Aggregate crushing value - Procedure as per IS: 2386 – Part VI (1963) , Specifications as per IS: 383 - 2016
- Aggregate impact value – Procedure as per IS: 2386 – Part VI (1963) , Specifications as per IS: 383 - 2016
- Aggregate abrasion value - Procedure as per IS: 2386 – Part VI (1963) , Specifications as per IS: 383 - 2016
- Soundness of coarse aggregate - Procedure as per IS: 2386 – Part V (1963) , Specifications as per IS: 383 - 2016
- Tensile Strength – IS: 1608: 2018
- Bend Test – IS 1599 : 2012
- Rebend Test – IS: 1786 - 2008
V. NDT TESTS(NON DESTRUCTIVE TEST)
- Pundit-Ultra Sonic testing Instrument – IS: 516 (Part 5)- 2018
- Silver Schmidt electronic concrete test hammer – IS: 13311 (Part 2)
VI. BITUMEN TEST (IS:1201 to IS:1220)
- Flash & fire point of bitumen
- Viscosity of cut back bitumen
- Softening point - Ring & ball
- Ductility of bitumen
VII. CORE EXTRACTION – IS : 1199, IS : 516 - 2018
VIII. PULLOUT TEST – IS: 11309
IX. COMPRESSIVE STRENGTH OF
1. C.C.CUBES - IS: 516 - 2018
2. C.C CORES
X. DESIGNING OF MIXES FOR CEMENT CONCRETE
--- A “SMOKELESS CHELLA” was invented during 1950 and used world wide.
--- A Medal was received from the Central Board of Irrigation and Power for a contribution about the bond between Steel and Concrete that has resulted in considerable savings in the reinforcement to be provided.
--- Mix Designs by absolute volume method was invented due to which about 10 to 15% saving in the Cement Concrete mixes was