CDOS India - Centre for Development Of Stones  info@cdos-india.com
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Stone Testing Laboratory 2021-03-17T04:14:03+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.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-15ε1Abrasion Resistance of Stone Subjected to Foot Traffic
4C 99/ C99M-18Modulus of Rupture
5E 303-03Slip Resistance Value using the British Pendulum Tester
6C 121/C121M-15Water Absorption of Slate*
7C 880/ C880M-18Flexural Strength*
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
1EN 1926:2006Compressive Strength
2EN 12370:1999Resistance to Salt Crystallization
3EN 12371:2010Frost Resistance (Technological Test)
a) EN 1926:2006Pre & Post Compressive Strength (Freeze Thaw test)
b) EN 12372:2006Pre & Post Flexural Strength (Freeze Thaw test)
4EN 12372:2006Flexural Strength under Concentrated Load
5EN 13161:2008Flexural Strength under Constant Moment
6EN 13755:2008Water Absorption at Atmospheric Pressure
7EN 14157:2017Abrasion Resistance
8EN 14158:2004Rupture Energy or Impact Resistance
9EN 14231:2003Slip Resistance by means of the Pendulum Tester
10EN 1925:1999Water Absorption Coefficient by Capillarity
11EN 12057:2015,

EN 12058:2015

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

EN 12058:2015,

EN 1469:2015

Visual Appearance (Polished Surface)
13EN 12407:2007Petrographic Examination*
14EN 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 : 1974 True Specific Gravity
 3IS 1124 : 1974Water Absorption, Apparent Specific Gravity, and Porosity
 4IS 1126 : 2013Durability of Natural Building Stones
 5IS 1123 : 1975Identification of Natural Building Stones*

*Not under our NABL Scope of Accreditation

Other Tests
 1Moh’s Hardness
 2Rebound 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 TestTest StandardNo. of SamplesSize of SamplesTesting Charges (Rs.)
1Bulk Density, Bulk Specific Gravity and  Water AbsorptionC 97/C97M-18850 x 50 x 50 mm39000*
2Compressive StrengthC 170/ C170M-172050 x 50 x 50 mm37500
3Abrasion Resistance of Stone Subjected to Foot TrafficC 241/ C241M-15ε1650 x 50 x 25 mm37000
4Modulus of RuptureC 99/ C99M-1820200 x 100 x 60 mm37500
5Slip Resistance Value using the British Pendulum TesterE 303-036160  x 160 x 15 mm35000
6Water Absorption of SlateC 121/C121M-158125 x 125 x (5-8) mm33000
7Flexural StrengthC 880/ C880M-1820350 x 100 x 30 mm37500
8Slake Durability of Shale’s and similar weak rocksD 4644-08–1 Kg stone fragments 40 to 60 grams each4000
9Specular GlossD 523 – 20146200 x 200 x (15-20) mm32000
* Standard includes Bulk Density, Bulk Specific Gravity &Water Absorption tests. Test Charges for each test is Rs. 3000.
EN TEST STANDARD
10Compressive StrengthEN 1926:20062050 x 50 x 50 mm36500
11Resistance to Salt CrystallizationEN 12370:1999740 x 40 x 40 mm313000
12Frost Resistance (Technological Test)EN 12371:2010–––
a.Sub test: Pre & Post Compressive Strength (Freeze Thaw test)EN 1926:20064250 x 50 x 50 mm330000
b.Sub test:  Pre & Post Flexural Strength (Freeze Thaw test)EN 12372:200642300 x 50 x 50 mm330000
13Flexural Strength under Concentrated LoadEN 12372:200620300 x 50 x 50 mm36500
14Flexural Strength under Constant MomentEN 13161:200820300 x 50 x 50 mm36500
15Water Absorption at Atmospheric PressureEN 13755:2008650 x 50 x 50 mm34000
16Abrasion ResistanceEN 14157:20176100 x 70 x 70 mm36000
17Rupture Energy or  Impact ResistanceEN 14158:20047200 x 200 x 30 mm34000
18Slip Resistance Value by means of the Pendulum TesterEN 14231:20036160 x 160 x 15 mm37000
19Water Absorption Coefficient by CapillarityEN 1925:1999650 x 50 x 50 mm34000
20Visual AppearanceEN 12057:2015,

EN 12058:2015

3500 x 500 x 18 mm3 (Polished Surface)2000
21TactilityEN 12057:2015,

EN 12058:2015,

EN 1469:2015

3500 x 500 x 18 mm3 (Unpolished /Machine Cut Surface)2000
22Resistance to Ageing by Thermal Shock (Change in Flexural Strength % only)EN 12407:200720300 x 50 x 50 mm315000
23Petrographic ExaminationEN 14066:20133100 x 50 x 50 mm3 the sample shall be fresh, insitu and representative.6000
IS TEST STANDARD
24Compressive StrengthIS 1121(Part 1) : 20132050 x 50 x 50 mm37500
25True Specific GravityIS 1122 : 19742 Kg pieces50 gram powder

(150 micron IS Sieve)

3000
26IdentificationIS 1124 : 19743100 x 50 x 50 mm36000
27Water Absorption, Apparent Specific Gravity and PorosityIS 1126 : 20135 Kg Lumps3 Kg (20 mm IS Sieve)9000*
28DurabilityIS 1123 : 19755Cylindrical 54 mm diameter or larger dia & 100 mm length13000
* Standard includes Water Absorption, Apparent Specific Gravity and Porosity tests. Test Charges for each test is Rs. 3000.
OTHER TESTS
29Moh’s HardnessCDOS/TP/23350 x 50 x 25 mm31500
30Rebound Hardness–3200 x 200 x 150 mm32000

Chemical Analysis Charges

Type  of RocksTest 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  rocksRs. 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 EarthRs. 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 Chief Executive Officer, CDOS, (M) 98291-64433, Email id: testinglab@cdos-india.com