PHYSICO – MECHANICAL AND CONSTRUCTION TESTING LABORATORY



Physical mechanical and construction Laboratory (Technical Division 4) belongs to Quality Assurance and Testing Centre 2. Our Laboratory has been assessed and found to conform with the requirements of ISO/ IEC 17025:2005, Accreditation No : VILAS 023.
Designated by Ministry of Construction as the laboratory testing the quality of products, goods, construction materials, under Decision No. 1310/QĐ-BXD dated October 31st, 2014 and Decision No. 1442/QĐ-BXD dated December 8th , 2014.
Designated by Ministry of Industry and Trade as the laboratory testing the quality of steel, under Decision No. 10815/QĐ-BCT dated November 26th, 2014.
Our laboratory is equipped with state-of-the-art equipment to perform tests in accordance with national standards and other international applicable standards (ASTM, BS, JIS…) and with highly qualified and experienced personnel who perform the tests.

Our Inspection and Materials Testing services include

• Quality Testing of construction materials : steel, cement clinker and cement, skim coat, aggregate, concrete, ceramic tiles, construction glasses, paint and waterproofing materials, natural wood and industrial boards etc …
• Product Inspection of construction works, reinforced concrete such as sewer, centrifugal concrete column …
• Quality testing of industrial products such as rubber, plastic pipes, paper, cloth, helmets, plastic doors, children’s toys, sanitary wares, etc.
• Training testers for the fields as construction materials, rubber, plastic, mechanical …

List of test equipment (click to see more)
  EQUIPMENT TECHNICAL CHARACTERISTICS
1 Universal Testing Machine 03 scales

* 20 ton, d = 50kg

* 50 ton, d = 100kg

* 100 ton, d = 200kg

2 Instron 400 HVL Universal Testing Machine Measuring range : 0¸2000 kN
3 COMPACT 1560kN compressor Measuring range : 0¸1560 kN
4 Instron 5582 Universal Testing Machine Measuring range : 0¸100 kN
5 RMU 300kN compressor Measuring range : 0¸300 kN
6 ZWICK 2000N tractor Measuring range : 0¸2000 N
7 Electronic scale Sartorius BP 6100 Measuring range : 0¸6100g , d=0,1 g
8 Electronic Scale Sartorius GT310 Measuring range : 0¸310g , d=0,01 g
9 Digital weighing machine DIGI Measuring range :

0¸60kG , d =1 g

10 BINDER drying cabinet Drying To : 0 ¸ 300oC
11 XMTH Oven Drying To : 0 ¸ 300oC
12 CHOJI Oven Drying To : 0 ¸ 350oC
13 LENTON Furnace Drying To : 0 ¸ 1100oC
14 Concrete hammer Measuring range : 0¸70 Mpa
15 Sample Mixer XM CONTROL 2 speed 🙁 140 &285) V/ph
16 XM ballast machine Frequency: 60 times / min
17 HOREX Electronic calipers Measuring range: 0¸300mm, d=0,01mm
18 MITUTOYO Electronic calipers Measuring range: 0¸200mm, d=0,01mm
19 Mechanical calipers d = 0,05mm Measuring range: 0¸200mm, d=0,05mm
20 Coating thickness gauge Measuring range : 0¸1500 mm
21 Standard sieve
22 Pressure Gauge 1 Measuring range: 0¸20kG/cm2,

d = 0,5kG/cm2

23 Pressure Gauge 2 Measuring range: 0¸50kG/cm2,

d = 2kG/cm2

24 Pressure Gauge 3 Measuring range: 0¸100kG/cm2,

d = 2kG/cm2

25 Pressure and Force Gauges 1 Measuring range: 0¸250kG/cm2,

d = 5kG/cm2;

Measuring range: 0¸10 Tấn

26 Pressure and Force Gauges 2 Measuring range: 0¸400 kg/cm2,

D = 10kg/cm2;

measuring range: 0 ¸ 20 Tấn

27 Pressure and Force Gauges 3 Measuring range: 0¸100 kg/cm2,

D = 10kg/cm2;

measuring range: 0 ¸ 6 Tấn

28 Dial indicator 1 Measuring range: 0¸10mm,

d = 0.01mm

29 Dial indicator Measuring range: 0¸10mm,

d = 0.01mm

30 Dial indicator GUOGEN Measuring range: 0¸10mm,

d = 0.01mm

31 Sound Measurement Instrument 1 (2784247-2239 FURFILS) Measuring range: 0÷200 dB,

 

32 Sound Measurement Instrument 2 (2784247-2239 FURFILS) Measuring range: 0¸200 dB,

 

33 Power meter Measuring range: 0-20kN; d=1 kN
34 Surface abrasive machine – 1 (50×50)mm; (70×70)mm
35 Force Measuring Instruments (804-001) Measuring range: (0-250)N; d=0,1kN
36 Thickness Film Thickness Meter (FTG30811004F)
37 Torque Test Equipment (TNP-5) Measuring range 0-0,5 N.m; d=0,1N.m
38 Thermometer (OAKTON 11720651)         Measuring range 0-300 0C; d=10C
39 Accelerometer (TT824) Measuring range 0,0001-60 s
40 Brinel hardness tester Measuring range 0-3000 N
41 BTLT power pole test rig Measuring range 0-2000 daN
42 SKZ-10 ceramic tile testing machine Measuring range 0-10 kN; d=1N
43 Equipment for deep abrasive testing of ceramic tiles Measuring range 0-99000 vòng
44 Ceramic surface abrasive testing equipment Measuring range 0-99000 vòng
45 Equipment measures the size of ceramic tiles Measuring range 0-1 m; d=1mm
46 Autoclave device Measuring range 0-4MPa
47 Charpy Impact Equipment Measuring range: 0-300J; d=1J
48 Portable hardness tester 0-60 HRC; 0-300HV
49 Measuring instrument for solar energy transmission Measuring range 0-100%; d=0,1%
50 Pocket light measuring instrument Measuring range 0-100%; d=0,1%
51 Surface tension measuring device of glass Measuring range 0-180 MPa; d=1,7MPa
52 Thermometer measured from afar 0-3000C; d=10C
53 Pendulum impact device M=45kg, h=1500mm
54 Moisture expansion tester Measuring range 0-10mm; d=0,01mm
55 Long thermal expansion test equipment Measuring range 0-30mm; d=0,0001mm
56 From environment Measuring range 0-1500C;

0-100%

57 Equipment for washing away paint film Measuring range 0-9999 times

Speed 5-95 times

58 Impact test rig paint film m=0-2000g; h=0-1m
59 Shade paint test equipment Measuring range 0-2000GU; d=0,1GU
60 Hardness tester Measuring range 0-120
61 Color film viscosity tester (KU) Measuring range 40-141 KU; d=0,1 KU
62 Test equipment for smooth film coating Measuring range 0-100 mm;

0-50 mm; 0-25 mm; 0-15 mm

63 Film bending tester Measuring range 0-32 mm
Product and test criteria (click to see more)
  PRODUCT AND TEST CRITERIA TEST METHODS
A STEEL & MECHANICAL  
A.1 STEEL  
1 Steel tensile test TCVN 197:2014
1.1 Shaped steel plates, tubes and rods of a diameter greater than 32 mm
  Steel thickness h £16mm
  Steel thickness h > 16mm  
1.2 Plain bars steel, ribbed bars steel  
  Steel diameter d £20mm
  Steel diameter d >20 mm
2 Steel bending test TCVN 198:2008
2.1 Shaped steel, sheet and bar steel of a diameter of more than 32 mm
Steel thickness h £16mm
Steel thickness h > 16mm
2.2 Plain bars steel, ribbed bars steel
Steel diameter d £20mm
Steel diameter d >20 mm
3 Mass per 1 meter in length
Plain bars
Ribbed bars
Steel Shape (Thickness, mass / m2)
4 Bolts of all kinds TCVN 1916:1995
4.1 Tensile test (see 1.2)  
4.2 Proof load test
d  £25 mm
d  >25 mm
5. Steel for the prestressing of concrete
  Tensile test
  d <14 mm  
  d ≥ 14mm
A.2 MECHANICAL
1. Hardness test
– Rockwell hardness test TCVN 257:2001
– Brinell hardness test TCVN 256:2001
– Vicker hardness test TCVN 258:2007
2. Charpy impact test TCVN 312:2007
1 – Environment temperature
2 – Temperature < 00C
3. Flattening pipe test TCVN 1632-76
4. Test pressure steel pipe, plastic pipe
– Up to 10 bar
 – From 11 bar to 20 bar
-> 20bar
5. Test steel wire ropes TCVN 7937:2013
  – Diameter of fibers
  – Number of fibers
  P <50kN
  50kN< P £ 100kN
  100kN< P £200kN
  200kN< P £400kN
  400kN< P £600kN
  P>600kN
6 Manhole cover and grating BS EN 124:1994
  P <50kN
50kN< P £ 100kN
100kN< P £200kN
200kN< P £300kN
300kN< P £400kN
P>400kN
7. Electrical products and accessories AS, ASTM
P <10kN
10kN< P £ 20kN
20kN< P £40kN
40kN< P £60kN
P>60kN
8. Test the spring washers TCVN 130-77
  – Size
  – Rockwell Hardness
  – coating thickness
  – Test the elasticity
  – Length
A.3 DETERMINATION OF SIZE
1. Measure simple details, less complex, less parameters (from 2 messages or less)
2. Measure simple details, less complex, less parameters (3 to 4 parameters)
3. Measure complex details, multiple parameters (from 5 parameters or more)
5 Measure the coating thickness TCVN 5408:2007
– By meter
– By mass method
6 Test coating adhesion
B CONSTRUCTION MATERIALS
B.1 CEMENT (BY TCVN)
1 Blain fineness TCVN 4030:2003
2 Fineness on silver 0,08 mm TCVN 4030:2003
3 Determination of density TCVN 4030:2003
4 Volume Weigh TCVN 4030:2003
5 Standard water volume TCVN 6017:1995
6 Determination of setting time TCVN 6017:1995
7 Determination of soundness TCVN 6017:1995
8 Compressive strength after 03 days, 28 days TCVN 6016:1995
9 Activation index I (R3; R28) TCVN 6882:2001
10 Autoclave expansion TCVN 6882:2001
B.2 CEMENT (BY ASTM)
1 Blain fineness ASTM C 204-95
2 Fineness on silver 0,075 mm ASTM C 430-96
3 Compressive strength R3, R28 ASTM C 109-95
4 Volume weigh ASTM C 191-95
5 Determination of density ASTM C 191-95
6 Standard water volume ASTM C 188-95
7 Autoclave expansion ASTM C 187-98
8 Determination of setting time ASTM C 151-98
9 Determination of soundness ASTM C 491-00
B.3  PORTLAND CEMENT – BASED SKIM COAT TCVN 7239:2003
1. Fineness through sieve 0.08mm
2. Volume weigh
3. Standard water volume
4. Determination of setting time
5. Adhesion strength (normal condition)
6. Adhesion strength (72h soaking condition)
7. Adhesion strength (50 cycles of thermal shock)
B.4 PAINT
1. Surface dry time TCVN 2096:1993
2. Time to live
3. Dry time completely TCVN 2096:1993
4. Water resistance TCVN 6934:2001
5. Determination of adhesion TCVN 2097:1993
6. Determination of scrub resistance of paint film
7. Determination of heat sock resistance of paint film
8. Bending strength
9. Impact resistance
10. Non-volatile matter content
11. Alkali resistance
B.5 SAND FOR CONSTRUCTION WORKS TCVN 7572:2006
1. Determination of partical size distribution
2. Determination of density
3. Determination of moisture
4. Determination of content of dust, mud
5. Determination of partical size distribution smaller than 75μm
6. Determination of organic impurities
7. Determination of bulk density
B.6 STONE FOR CONSTRUCTION WORKS TCVN 7572:2006
1. Determination of partical size distribution
2. Determination of density
3. Determination of moisture
4. Determination of content of dust, mud
5. Determination of organic impurities
6. Determination of bulk density
7. Determination of resistance to degradation by abration and impact in the Los Angeles machine
8. Determination of crushing value
9. Determination of elongation and flakiness index
10. Determination of feeble weathered particle content
11. Water absorption
12 Marking macadam (Determination of crushing value)
13 Compressive strength of primitive stone
14 Determination of voids
B.7 CONCRETE
1. Design of concrete mix as required (Slump, Rn) Materials supplied by the customer (Known quality of material) TCXD 199:1997   ACI 318, ASTM C172, C39
3. Determination of bulk density
4. Determination of density TCVN 3115:1993
5. Compressive strength in the sample room is available TCVN 3112:1993
6. Water absorption TCVN 3118:1993
7. Bending strength is available TCVN 3113:1993
8. Abrasion TCVN 3119:1993
9. Determination of setting time
10. Determination of air content TCVN, ASTM
B.8 CONSTRUCTION BRICK TCVN 6355:2009
1. Size
2. Compressive strength
3. Bend strength
4. Water absorption
5. Determination of bulk density
6. Determination of density
7. Fire resistance
B.9 CONCRETE BRICK TCVN 6477:2011
1. Size
2 Disability bonded
3 Compressive strength
4 Bend strength
5 Water absorption
6 Determination of bulk density
7 Determination of density
8 Water permeability
9 Volume bricks
10 Determination of voids
11 Determination of moisture
B.10 CEMENT TILES TCVN 6065:1995
1 Dimension
2 Layer thickness
3 Compressive strength
4 Bending strength (bending strength)
5 Shock force
6 Water absorption
7 Mass of tablets
8 Surface abrasion
9 Deep abrasion
B.11 ROOF TILES TCVN 4313:1995
1 Dimension BS EN 491
2 Disability bonded
3 Time without penetrance water
4 Bending load
5 Water absorption
6 The mass of 1m 2 saturated with water
B.12 CERAMIC TILES TCVN 6415:2005
1 Dimension
Average size of edges
Thickness, thickness difference
Straight edge
Rectangular
Flat surface
Surface quality
2 Glossiness
3 Bending strength
4 Water absorption
5 Mohs scale surface hardness
6 Surface abrasion resistance
7 Deep abrasion resistance
8 Thermal shock resistance
9 Resistance to stains
10 Determination of linear thermal expansion
11 Determination of moisture expansion
12 Determination of crazing resistance
13 Determination of frost resistance
14 Determination of chemical resistance (01 solvent)
B.13 GRANITE STONE TCVN 6415:2005
1 Bending strength
2 Compression strength
3 Water absorption
4 Mohs scale surface hardness
5 Determination of density
6 Deep abrasion resistance
7 Adhesion strength
8 Dimension
9 Surface gloss
B.14 FIBRO CEMENT  SHEET TCVN 4434:1992
1. Dimension
2. Mass plate
3. Bending load
4. Water absorption
5. Time without penetrance water
6. Determination of density
7. Appearance
B.15 NATURAL WOOD TCVN 8048:2009
1 Humidity
2 Compression strength
3 Bending strength
4 Tensile strengh
5 Determination of density
6 Surface hardness
7 Endurance of parallel cutting of fibers
B.16 WOOD BASED PANELS TCVN 7756:2007
1 Tensile strength perpendicular
2 Surface soundness
3 Thickness swelling
4 Bending strength
5 Determination of bonding quality
6 Moisture resistance
7 Resistance to axial withdrawal of screws
8 Resistivity when changing humidity
B.17 TECHNICAL GEOGRAPHY TCVN 8871:2011
1 Mass per area unit
2 Longitudinal tensile strength
3 Transverse tensile strength
4 Determination of the grab strength  
5 Trapezoid tearing force
6 Intensity strength
7 Puncture resistance by solid steel rod
8 Static strength CBR
9 Ultraviolet (UV) – 1000 hours
B.18 OIL PAPER, PACKAGING
1 Thickness TCVN 3652:2000
2 Longitudinal tensile strength TCVN 1862:2000
3 Transverse tensile strength
4 Tensile strength in saturated state
5 Durable punctures
6 Heat resistance
B.19  STYROFOAM ASTM D 3575
1 Determination of density
2 tensile strength
3. Tearing strength
4. Compressive strength
5. Permanent deformation
7. Water absorption
8. Resize when heated
B.20 GLASS CONSTRUCTION
1 Thermal resistance TCVN 7364:2004
2 Humidity resistance TCVN 7364:2004
3 Falling ball impact peeling characteristics TCVN 7368:2004
4 Shot bag impact characteristics TCVN 7368:2004
5 Crushing test TCVN 7455:2004
6 Check for defects, apear TCVN 7219:2002
7 Optical deformation TCVN 7219:2002
8 Dimension TCVN 7219:2002
9 The warp TCVN 7219:2002
10 Surface compression TCVN 7455:2004
11 Light transmission TCVN 7219:2002
12 Reflection of light TCVN 7219:2002
13 Dew point
B.21 GYPSUM BOARDS TCVN 8257:2009
1 Size
2 Bend strength
3 Determination of nail pull resistance  
4 Water absorption
5 Determination of surface water absorption
6 Determination of humidified deflection
7 Determination of end  hardness
8 Determination of edge hardness
9 Determination of core hardness
B.22 GROUTS AND ADHESIVES TCVN 7899:2008
1 Tensile adhesion strength (normal)
2 Tensile adhesion strength after heat ageing  
3 Compressive strength  
4 Bend strength  
5 Water absorption  
6 Waterproofing  
B.23 WATERPROOFING BS EN 14891:2007
1  Tensile adhesion strength  
2 Tensile adhesion strength after heat ageing  
3 Crack bridging ability under standard conditions  
4 Waterproofing  
B.24 REINFORCED CONCRETE PIPES FOR WATER DRAINING TCVN 9113:2012
1. Apparent
2. dimension
3. Rectangular
4. Determine the compressive strength of reinforced concrete (using bouncing hammers)
5. Load test (3-way method)
6. Waterproof
B.25 ALUMINUM  – PLASTIC COMPOSITE PANEL GBT 17748
1 Plate thickness
2 Aluminum thickness  
3 Bending strength
4 Flexible bending module
5 Pulling force 1800
6 Boiling water resistance
7 Heat deformation plate
8 Heat resistance (50 cycles)
B.26 CENTRIFUGAL REINFORED CONCRETE ELECTRIC POLES TCVN 5847-1994
1 Dimension
2 Loading test at the pole top
3 Determine the compressive strength of reinforced concrete  
B.27 QUALITY ASSURANCE
1 Compressive strength of Concrete structure at site
2 Method for determination of compressive strength by rebound hammer TCVN 9334:2012
4 Method for determination of compressive strength by using combination of ultrasonic equipment and rebound hammer TCVN 9335:2012
5 Drilling and determination of  Compressive strength  Concrete
 – F 50
 – F 75
 – F 100
 – F 150
C CONSUMER GOODS
C.1 BICYCLE, MOTORCYCLE TIRE
1 Tensile strength of  rubber TCVN 4509:2006
2 Adhesion rubber cloth TCVN 4867-89
3 Tensile strength of the railing TCVN 2269-77
4 Hardness Shore A TCVN 1595:2006
5 Tensile strength pulling joints TCVN 1592:2007
6 Abrasion Akron TCVN 1594:1987
7 Determination of density TCVN 3976:1991
8 Test aging TCVN 2229:2006
9 Adhesive Fabric – Fabric
C.2 RUBBER TECHNICAL
1 Tensile strength of  rubber TCVN 4509:2006
2 Tear resistance TCVN1597:2006
3 Determination of the effect of  liquids TCVN 2752- 78
4 Shore A hardness TCVN1595:2006
5 Determination of compression set TCVN 5320-1:2008
6 Abrasion Akron TCVN 1594-1987
7 Determination of density TCVN3976-91
8 Test aging TCVN 2229:2006
9 Rubber slide module and steel plate 22 TCN -217:1994
10 Adhesion to Rigid Substrates ASTM D429
C.3 CONDOM TCVN 6342:1998
1. Hole test
2. Determine the length
3. Determine the width
4. Determination of blast volume and pressure
5. Determination of explosive volume and pressure after aging
6. Determine the Mass
7. Tensile strength  
8. Tensile strength after aging
C.4 CHILDREN TOY QCVN3:2009/BKHCN

TCVN 6238-1:2011

1 Durability under load fall
2 Static stability
3 Durability falls
4 Static stability
5 Check hinges
6 Spring test
7 Check the wire
8 Check the joints
9 Check materials
10 Seam pull strength
11 Try pulling apart parts
12 Stability
13 Durable with P = 25kg
14 Try downloading
15 Try dragging the details
16 Size + volume
17 Try the free spin mechanism
18 Sharpness
19 Try the gap
20 Negative pressure
21 Try a toy fire
22 Spike
23 Small detail
24 Twist test
25 Compression test
26 Flush
27 Try the brake
28 Kinetic energy
C.5 PLASTIC AND PLASTIC PRODUCTS
1 Platic (Composite, Poly Carbonate)
1 Thickness
2 Mass per area unit
3 Determination of density TCVN 6038:1995
4 Tensile Test (Tensile Strength, Elongation) TCVN 4501:2009
5 Tensile modulus of elasticity TCVN 4501:2009
6 Bending strength ASTM D790
7 Flexible bending module ASTM D790
8 Compression strength ASTM D695
9 Impact strength (falling block weight) ISO 6603
10 Longitudinal reversion under thermal effect TCVN 6148:2007
11 Vicat Softening Temperature of Plastics ASTM D1525:1996
12 Boiling water immersion resistance
13 Water permeability TCVN 6042:1995
C.6 PLASTIC PIPE
1 Disability bonded
2 Tensile test (tensile strengh, elongation) TCVN 7434:2004
3 Longitudinal reversion under thermal effect TCVN6148:2007
4 Vicat Softening Temperature of Plastics TCVN 6147:2003
5 Determination of density TCVN 6038:1995
6 Water permeability TCVN 6042:1995
7 Impact resistance TCVN 6144:2003
8 Bending strength ASTM D790
9 Determination of dimension
10 PS hardness (horizontal compression) ASTM D2414
11 Determination of the resistance to internal pressure TCVN 6149:2003
12 Force achieved when compressing
13 Deformation when compressed
14 Force is achieved when flat compressing
See Section 4, Part II, Steel and Mechanical (A)
12 Chemical durability (for 01 solvent)  
C.7 PLASTIC BOTTLE ASTM
1. Impact resistance
2. Durability falls freely
C.8 PAPER,PAPER BOX
1 Humidity ISO 535
2 Thickness TCVN 3652:2000
3 Mass per area unit
4 Determination of bursting strength TCVN 3228:2000
5 Determination of edgewise crush resistance ISO 3037
6 Flat compression test ISO 3035
7 Water permeability COB 60 ISO 535
8 Determining Compressive Resistance of shipping container ASTM D642-00
9 Determination of grammage TCVN 1270:2000
10 Determination of tensile strength TCVN 1862:2000
C.9 Cloth, yarn TCVN, ASTM
1 Quality yarn TCVN 1735:1986
2 Tensile strength single yarn  TCVN 4635:1988
3 Tensile strength the cloth  TCVN 4635:1988
4 Mass per area unit  TCVN 4636:1988
5 Yarn density of fabric  TCVN 4636:1988
6 Tensile strength after aging  TCVN 4635:1988
7 Thickness of fabric  TCVN 4636:1988
8 Waterproof durability ISO 1420:2001
C.10 HELMET QCVN 02:2008
1. Mass of cap
2. Visual  
3. Penetration test  (01 condition)  
4. Test for strength of chinstrap and fasteners
5. Stability
6. Mechanical of glass
7. Test for angle of vision
8. Impact energy attenuation  (01 condition)
C.11 DOOR TYPE (Window, door) TCVN 7452:2004
1. Determination of air permeability
2. Determination of watertightness
3 Determination of wind resistance
4 Trial open
5 Repeated opening and closing test
6 Basic dimension  
7 Sound attenuation  
8 Impact resistance  
9 Determination of strength of welded comers for U-PVC profiles
C.12  PROFILE
1 Basic dimension  BS EN 12608:2003
2 Dimension tolerance  BS EN 12608:2003
3 Mass bar per lengh unit  BS EN 12608:2003
4 Thickness of profile bar  BS EN 12608:2003
5 Sag  BS EN 12608:2003
6 Vicat soft heat ISO 306
7 Tensile test of plastic material ISO 527
8 Modulus of elastic
9 Thermal expansion EN 479
10 Impact resistance  EN 477
11 Properties after heating  EN 478
C.13 SANITARY CERAMIC WARE TCVN 5436:2006
1 Dimension and Bonding
2 Water absorption
3 Heat resistance
4 Endurance of yeast
5 Hardness of the yeast
6 Ink penetrance
7 Load bearing capacity
8 Paper drainage discharge
9 Cleaning degree with ink
10 Water closet flusing test
11 Plastic waste water discharge
12 Flow rate of water
13 Water level in siphon
14 Siphon width
15 Water leakage
16 Gas leakage
C.14 LIFEJACKETS
1 Floatability TCVN 7282: 2008
2 Reliability
3 Fire resistance
4 Oil resistance
5 Force pull the straps BS 5131:1981
6 Tension rupture the strings around the shirt BS 5131:1981
7 Tensile strength of the lock set BS 5131:1981
8 Tensile strength of the retractor BS 5131:1981
9 Thickness of a porous gut TCVN 5071: 2007
10 Deformation under the effect of a constant force of 0.44 kN for 3 hours of 35mm thick layers ASTM D621-64
C.15 FIBER CEMENT FLAT SHEETS TCVN 8258:2009
1 Bending strength
2 Waterproof

 



QUALITY ASSIURENCE AND TESTING CENTRE 2 – Technical Division 4
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