Stone Testing Laboratory

NABL accredited

Stone Testing Laboratory

Centre for Development of Stones (CDOS) had established a state of the art exclusively dedicated Stone Testing Laboratory 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 is in operation since 2006, which had obtained ISO certification and NABL accreditation in 2013 for Physico-Mechanical Testing. At present there are 26 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) standard.

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

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

(Latest NABL Accreditation certificate no. TC-5794)

National & International Level Test

Chemical Lab

Request A Test Form

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.NoStandard no.Dimensional Stone Test Methods
1C 97/C97M-18Bulk Density, Bulk Specific Gravity and Water Absorption
2C 170/ C170M-17Compressive Strength
3C 241/ C241M-21Abrasion Resistance of Stone Subjected to Foot Traffic
4C 99/ C99M-18Modulus of Rupture
5E 303-18Slip Resistance Value using the British Pendulum Tester
6C 880/ C880M-18Flexural Strength*
7C 121/C121M-15Water Absorption of Slate*
8D 523 – 2014Specular Gloss*
9D 4644-08Slake Durability of Shale’s and Similar Weak Rocks*

*Not under our NABL Scope of Accreditation

European (EN) Test Standard
S.NoStandard no.Natural Stone Test Methods
1.EN 1926:2006Compressive Strength
2.EN 12370:2020Resistance to Salt Crystallization
3.EN 12371:2010Frost Resistance (Technological Test)
 1.Pre & Post Compressive Strength (Freeze Thaw test)
2.Pre & Post Flexural Strength (Freeze Thaw test)
4.EN 12372:2022Flexural Strength under Concentrated Load
5.EN 13161:2008Flexural Strength under Constant Moment
6.EN 13755:2008Water Absorption at Atmospheric Pressure
7.EN 14157:2017Abrasion Resistance
8.EN 14158:2004Rupture Energy or Impact Resistance
9.EN 14231:2003Slip Resistance by means of the Pendulum Tester
10.EN 1925:1999Water 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 14066:2013Resistance to Ageing by Thermal Shock (Change in Flexural Strength % only)*

*Not under our NABL Scope of Accreditation

Indian (IS) Test Standard
S.NoStandard no.Natural Building Stones
1IS 1121(Part 1) : 2013Compressive Strength
2IS 1122 : 1974True Specific Gravity
3IS 1124 : 1974Water Absorption, Apparent Specific Gravity, and Porosity
4IS 1126 : 2013Durability of Natural Building Stones
Other Tests
 1Moh’s Hardness
 2Rebound Hardness*

*Not under our NABL Scope of Accreditation

B. Chemical Analysis

Chemical Analysis For Following Radicals

Sample Size/Quantity of Sample – 1 Kg lumps

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

S.No. Name of Test Test Standard No. of Samples Size of Samples Testing Charges (Rs.)
ASTM TEST STANDARD
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-21 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 303-2018 6 160 x 160 x 15 mm3 5000
6 Flexural Strength C 880/ C880M-18 20 350 x 100 x 30 mm3 7500
7 Water Absorption of Slate C 121/C121M-15 8 125 x 125 x (5-8) mm3 3000
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 12370:2020 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 12372:2022 42 300 x 50 x 50 mm3 30000
13 Flexural Strength under Concentrated Load EN 12372:2022 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 14066:2013
a. Sub test: Pre & Post Flexural Strength EN 12372:2022 20 300 x 50 x 50 mm3 15000
IS TEST STANDARD
23 Compressive Strength IS 1121(Part 1) : 2013 20 50 x 50 x 50 mm3 7500
24 True Specific Gravity IS 1122 : 1974 2 Kg Lumps 3000
25 Water Absorption, Apparent Specific Gravity and Porosity IS 1124 : 1974 5 Kg Lumps 9000*
26 Durability IS 1126 : 2013 6 Cylindrical 50 mm diameter & 100 mm length 13000
*Standard includes Water Absorption, Apparent Specific Gravity and Porosity tests. Test Charges for each test is Rs. 3000.
OTHER TESTS
27 Moh’s Hardness CDOS/TP/23 3 50 x 50 x 25 mm3 1500
28 Rebound Hardness 3 200 x 200 x 150 mm3 2000

Chemical Analysis

Type of RocksTest Charges for Analysis (6 radicals)
Granite, Marble, Flaggy Limestone, Sandstone, Quartzite, Slate, Schist, Serpentine and Industrial Minerals (Soap Stone, China Clay, Quartz, Feldspar, Silica Sand, Calcite, Siliceous Earth, Bentonite, Fuller’s Earth)

Rs. 3500/-

(CaO, MgO, SiO2, Fe2O3, Al2O3 and LOI)

Note – In case of chemical testing:

  1. 6 radicals include – CaO, MgO, SiO2, Fe2O3, Al2O3 and LOI
  2. Charge for any single radical is Rs. 1000/- only
  3. For determination of additional (CaCO3) radical in marble based rocks Rs. 1000/- extra.

MODE OF PAYMENT

PREPARATION OF SAMPLES AND THEIR DISPATCH

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 enquiry please contact Chief Executive Officer, CDOS, (M) 98291-64433 and Consultant Geologist, CDOS, (M) 94133-00479, Email id: testinglab@cdos-india.com