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IS 1130:1969 is the Indian Standard (BIS) for kota stone (limestone) - specification. This standard lays down the specifications for Kota stone (a hard, compact limestone) used for flooring, facing, and paving. It defines acceptable dimensions, physical properties, and tolerances to ensure structural and architectural quality during construction.
Specifies requirements for Kota stone (limestone) used as building material, including physical characteristics and quality.
Standard Specification for Limestone Dimension Stone
Specifies material requirements, classifications, and physical properties for limestone used as dimension stone.
EN 12058:2015CEN (European Committee for Standardization)
HighCurrent
Natural stone products - Slabs for floors and stairs - Requirements
Specifies requirements for finished limestone slabs used for flooring, a primary application for Kota stone.
EN 1341:2012CEN (European Committee for Standardization)
MediumCurrent
Slabs of natural stone for external paving - Requirements and test methods
Covers requirements for natural stone slabs for external paving, another common use for durable Kota stone.
Key Differences
≠IS 1130 specifies a single set of minimum requirements for Kota stone, whereas ASTM C568 classifies limestone into three types (I-Low Density, II-Medium Density, III-High Density) with different physical property requirements for each.
≠Modern standards like EN 12058 and EN 1341 require the specification of critical performance characteristics like abrasion resistance and slip resistance, which are not included in the 1969 version of IS 1130.
≠IS 1130 is prescriptive, setting absolute minimum values (e.g., Compressive Strength ≥ 108 MPa). EN standards often follow a 'declaration' model, where the manufacturer must test and declare the value, which must then be fit for the intended purpose, rather than meeting a single universal minimum.
≠IS 1130 includes a chemical requirement (min. 90% Calcium Carbonate), focusing on the material's composition. In contrast, ASTM C568 focuses entirely on physical performance properties, with no chemical composition requirements.
Key Similarities
≈All standards serve the primary purpose of defining minimum quality and physical characteristics to ensure the suitability of limestone for use as a building material.
≈Core physical properties such as Compressive Strength and Water Absorption are specified in both IS 1130 and its international counterparts as fundamental indicators of durability.
≈All standards include clauses addressing the finish, appearance, and freedom from defects like cracks, seams, or imperfections that would impair the stone's performance or aesthetics.
≈The standards are based on a common geological understanding of limestone as a sedimentary rock composed principally of calcium carbonate, intended for use in construction.
Parameter Comparison
Parameter
IS Value
International
Source
Compressive Strength (min)
≥ 108 N/mm² (MPa)
≥ 55 MPa
ASTM C568 (for High-Density Limestone)
Water Absorption (max, by weight)
≤ 1.0%
≤ 3.0%
ASTM C568 (for High-Density Limestone)
Transverse Strength / Modulus of Rupture (min)
≥ 13.7 N/mm² (MPa)
≥ 6.9 MPa
ASTM C568 (for High-Density Limestone)
Specific Gravity / Density (min)
Specific Gravity ≥ 2.6
Density ≥ 2560 kg/m³ (SG ≈ 2.56)
ASTM C568 (for High-Density Limestone)
Abrasion Resistance
Not Specified
Required for flooring/paving (e.g., Class 3 paving requires ≤ 20 mm loss in Wide Wheel Abrasion Test)
EN 1341
⚠ Verify details from original standards before use