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Stone Testing Laboratory 2020-09-16T11:48:37+00:00

R & D Centre – cum – Stone Testing Laboratory

Centre for Development of Stones (CDOS) had established a state of the art exclusively dedicated laboratory cum R & D Centre for Testing of Physico-Mechanical properties of Dimensional and Decorative Stones. This laboratory was established with the assistance of Ministry of Mines, Govt. of India, United Nations Industrial Development Organization (UNIDO), Government of Rajasthan and Rajasthan State Industrial Development & Investment Corporation Ltd. (RIICO). The Dimensional and Decorative Stone Testing Laboratory cum R&D Centre is in operation since 2006, which had obtained ISO certification and NABL accreditation in 2013 for Physico-Mechanical Testing. At present, there are 27 various Physico-Mechanical tests covered under NABL accreditation. The Dimensional and Decorative stones are being tested as per American (ASTM), European (EN) and Indian (IS) standards.

Besides chemical analysis of stones is also being carried out since 2010 at the center by conventional titration method.

The facility available at the center has contributed significantly to the export of Dimensional and Decorative from the country.

Latest NABL Accreditation certificate no. TC-5794

NATIONAL & INTERNATIONAL LEVEL TEST
  • Tests Being Performed (Physico-Mechanical Tests and Chemical Analysis)
  • Physico- Mechanical Test: Test Name, Standard, No. of Samples, Sample Size and Test Charges
  • Chemical Analysis Charges
  • Mode of Payment
  • Preparation of samples and their dispatch
  • Sample Receiving Time
  • Test Request Form
  • Contact Details

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TEST BEING PERFORMED

Following tests are being performed in accordance to American (ASTM), European (EN) and Indian (IS) standards.

A. Physico- Mechanical Properties

American Society Testing Material (ASTM) Test Standard
S.No Standard no. Dimensional Stone Test Methods
1 C 97/C97M-18 Bulk Density, Bulk Specific Gravity and Water Absorption
2 C 170/ C170M-17 Compressive Strength
3 C 241/ C241M-15ε1 Abrasion Resistance of Stone Subjected to Foot Traffic
4 C 99/ C99M-18 Modulus of Rupture
5 E 303-03 Slip Resistance Value using the British Pendulum Tester
6 C 121/C121M-15 Water Absorption of Slate*
7 C 880/ C880M-18 Flexural Strength*
8 D 523 – 2014 Specular Gloss*
9 D 4644-08 Slake Durability of Shale’s and Similar Weak Rocks*

*Not under our NABL Scope of Accreditation

European (EN) Test Standard
S.No Standard no. Natural Stone Test Methods
1 EN 1926:2006 Compressive Strength
2 EN 12370:1999 Resistance to Salt Crystallization
3 EN 12371:2010 Frost Resistance (Technological Test)
a) EN 1926:2006 Pre & Post Compressive Strength (Freeze Thaw test)
b) EN 12372:2006 Pre & Post Flexural Strength (Freeze Thaw test)
4 EN 12372:2006 Flexural Strength under Concentrated Load
5 EN 13161:2008 Flexural Strength under Constant Moment
6 EN 13755:2008 Water Absorption at Atmospheric Pressure
7 EN 14157:2017 Abrasion Resistance
8 EN 14158:2004 Rupture Energy or Impact Resistance
9 EN 14231:2003 Slip Resistance by means of the Pendulum Tester
10 EN 1925:1999 Water Absorption Coefficient by Capillarity
11 EN 12057:2015,

EN 12058:2015

Tactility (Unpolished / Machine Cut  Surface)
12 EN 12057:2015,

EN 12058:2015,

EN 1469:2015

Visual Appearance (Polished Surface)
13 EN 12407:2007 Petrographic Examination*
14 EN 14066:2013 Resistance to Ageing by Thermal Shock (Change in Flexural Strength % only)*

*Not under our NABL Scope of Accreditation

Indian (IS) Test Standard
S.No Standard no. Natural Building Stones
 1 IS 1121(Part 1) : 2013 Compressive Strength
 2 IS 1122 : 1974 True Specific Gravity
 3 IS 1124 : 1974 Water Absorption, Apparent Specific Gravity, and Porosity
 4 IS 1126 : 2013 Durability of Natural Building Stones
 5 IS 1123 : 1975 Identification of Natural Building Stones*

*Not under our NABL Scope of Accreditation

Other Tests
 1 Moh’s Hardness
 2 Rebound Hardness*

*Not under our NABL Scope of Accreditation

B. Chemical Properties Tests

CHEMICAL ANALYSIS FOR FOLLOWING REDICALS

  • CaO
  • MgO
  • SiO2
  • LOI
  • Fe2O3
  • Al2O3
  • Na
  • K
  • Sample Size/Quantity of Sample – 1 Kg preferably lumps/Powder

Note: Chemical Analysis is not under our NABL Scope of Accreditation

TEST NAME, STANDARD, NO. OF SAMPLE, SAMPLE SIZE AND TEST CHARGES

Samples are to be provided by the customer as per requirement of the test standard.

Physico-Mechanical Tests

ASTM TEST STANDARD
S.No. Name of Test Test Standard No. of Samples Size of Samples Testing Charges (Rs.)
1 Bulk Density, Bulk Specific Gravity and  Water Absorption C 97/C97M-18 8 50 x 50 x 50 mm3 9000*
2 Compressive Strength C 170/ C170M-17 20 50 x 50 x 50 mm3 7500
3 Abrasion Resistance of Stone Subjected to Foot Traffic C 241/ C241M-15ε1 6 50 x 50 x 25 mm3 7000
4 Modulus of Rupture C 99/ C99M-18 20 200 x 100 x 60 mm3 7500
5 Slip Resistance Value using the British Pendulum Tester E 303-03 6 160  x 160 x 15 mm3 5000
6 Water Absorption of Slate C 121/C121M-15 8 125 x 125 x (5-8) mm3 3000
7 Flexural Strength C 880/ C880M-18 20 350 x 100 x 30 mm3 7500
8 Slake Durability of Shale’s and similar weak rocks D 4644-08 1 Kg stone fragments 40 to 60 grams each 4000
9 Specular Gloss D 523 – 2014 6 200 x 200 x (15-20) mm3 2000
* Standard includes Bulk Density, Bulk Specific Gravity &Water Absorption tests. Test Charges for each test is Rs. 3000.
EN TEST STANDARD
10 Compressive Strength EN 1926:2006 20 50 x 50 x 50 mm3 6500
11 Resistance to Salt Crystallization EN 12370:1999 7 40 x 40 x 40 mm3 13000
12 Frost Resistance (Technological Test) EN 12371:2010
a. Sub test: Pre & Post Compressive Strength (Freeze Thaw test) EN 1926:2006 42 50 x 50 x 50 mm3 30000
b. Sub test:  Pre & Post Flexural Strength (Freeze Thaw test) EN 12372:2006 42 300 x 50 x 50 mm3 30000
13 Flexural Strength under Concentrated Load EN 12372:2006 20 300 x 50 x 50 mm3 6500
14 Flexural Strength under Constant Moment EN 13161:2008 20 300 x 50 x 50 mm3 6500
15 Water Absorption at Atmospheric Pressure EN 13755:2008 6 50 x 50 x 50 mm3 4000
16 Abrasion Resistance EN 14157:2017 6 100 x 70 x 70 mm3 6000
17 Rupture Energy or  Impact Resistance EN 14158:2004 7 200 x 200 x 30 mm3 4000
18 Slip Resistance Value by means of the Pendulum Tester EN 14231:2003 6 160 x 160 x 15 mm3 7000
19 Water Absorption Coefficient by Capillarity EN 1925:1999 6 50 x 50 x 50 mm3 4000
20 Visual Appearance EN 12057:2015,

EN 12058:2015

3 500 x 500 x 18 mm3 (Polished Surface) 2000
21 Tactility EN 12057:2015,

EN 12058:2015,

EN 1469:2015

3 500 x 500 x 18 mm3 (Unpolished /Machine Cut Surface) 2000
22 Resistance to Ageing by Thermal Shock (Change in Flexural Strength % only) EN 12407:2007 20 300 x 50 x 50 mm3 15000
23 Petrographic Examination EN 14066:2013 3 100 x 50 x 50 mm3 the sample shall be fresh, insitu and representative. 6000
IS TEST STANDARD
24 Compressive Strength IS 1121(Part 1) : 2013 20 50 x 50 x 50 mm3 7500
25 True Specific Gravity IS 1122 : 1974 2 Kg pieces 50 gram powder

(150 micron IS Sieve)

3000
26 Identification IS 1124 : 1974 3 100 x 50 x 50 mm3 6000
27 Water Absorption, Apparent Specific Gravity and Porosity IS 1126 : 2013 5 Kg Lumps 3 Kg (20 mm IS Sieve) 9000*
28 Durability IS 1123 : 1975 5 Cylindrical 54 mm diameter or larger dia & 100 mm length 13000
* Standard includes Water Absorption, Apparent Specific Gravity and Porosity tests. Test Charges for each test is Rs. 3000.
OTHER TESTS
29 Moh’s Hardness CDOS/TP/23 3 50 x 50 x 25 mm3 1500
30 Rebound Hardness 3 200 x 200 x 150 mm3 2000

Chemical Analysis Charges

Type  of Rocks Test Charges for Analysis
Carbonate based rocks- Marble, Limestone, Serpentine etc. Rs. 3500/- for 6 radicals CaO, MgO, SiO2, LOI, Fe2O3 and Al2O3
Silica based rocks –Sandstone, Quartzite, Quartz etc. Rs. 3500/- for 6 radicals (CaO, MgO, SiO2, LOI, Fe2O3 and Al2O3 )and Rs. 600/- extra for each additional radical (Na & K)
Granitic, Slate, Schist, Feldspar Block  rocks Rs. 3500/- for 6 radicals (CaO, MgO, SiO2, LOI, Fe2O3 and Al2O3) and Rs.600/- extra for each additional radical (Na & K)
Industrial  Minerals- Soap Stone, China Clay, Quartz, Feldspar, Silica Sand, Calcite, Siliceous Earth, Bentonite, Fuller’s Earth Rs. 3500/- for 6 radicals (CaO, MgO, SiO2, LOI, Fe2O3 and Al2O3) and Rs.600/- extra for each additional radical (Na & K)

Note – Test charge for any single radical is Rs. 1000/- only

MODE OF PAYMENT

Physico-Mechanical Test and Chemical Analysis

  • 100% in advance through NEFT/RTGS. The NEFT/RTGS should be in favor of the Centre for Development of Stones, payable at Jaipur.
  • 10% discount would be allowed to CDOS members (excluding annual members).
  • GST @18% will be charged extra.

PREPARATION OF SAMPLES AND THEIR DISPATCH

Physico-Mechanical Test

  • Sample should be prepared from a single fresh block. Block should be representative and free from cracks, fractures etc.
  • Sample size & numbers should be strictly according to the test requirement. As precautionary measure 3 samples should be sent extra, in case, any sample is damaged in transportation extra samples could be utilized.
  • Samples should be packed properly to ensure that corners and edges of the samples may not be damaged during transportation.
  • In the case of core samples, the sample should be of 54.4 mm dia or larger dia free from cracks, fractures etc and length of each piece of core should be as per the test requirement.
  • All faces of samples should be smooth with sharp and distinct edges.

SAMPLES RECEIVING TIME

Kindly send the samples between 11 A.M to 5 P.M on Monday to Friday working days besides; also leave Rajasthan Government Gazetted Holidays.

TEST REQUEST FORM

Please download Test Request Form and incorporate information along with the test requirement.

CONTACT DETAILS

For any inquiry please contact Addl. Director Geology, CDOS, (M) 99295-99002, Email id: testinglab@cdos-india.com