IS 10086 : 1982Code of Practice for Preparation and Treatment of Surfaces of Concrete for Application of Finishes

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ICRI 310.2R · ASTM D4258-05(2018) · BS EN 1504-10

CurrentSpecializedCode of PracticeBIMMaterials Science · Demolition, Renovation and Repair of Structures

Link points to Internet Archive / others. Not hosted by InfraLens. Details

IS 10086:1982 is the Indian Standard (BIS) for preparation and treatment of surfaces of concrete for application of finishes. This code specifies methods for preparing and treating new and old concrete surfaces before the application of finishes like paint, plaster, or special coatings. It covers procedures for cleaning, repairing defects, and profiling the surface using techniques such as acid etching, sandblasting, and mechanical grinding to ensure good adhesion and long-term performance of the finish.

Provides a code of practice for the proper preparation and treatment of concrete surfaces before applying finishes or repair materials.

Overview

Status: Current
Usage level: Specialized
Domain: Materials Science — Demolition, Renovation and Repair of Structures
Type: Code of Practice

International equivalents

ICRI 310.2R-2013 · International Concrete Repair Institute (ICRI), USA ASTM D4258-05(2018) · ASTM International, USA BS EN 1504-10:2016 · British Standards Institution / European Committee for Standardization, UK/EU ASTM D4260-05(2018) · ASTM International, USA

Typically used with

IS 2395 IS 1303 IS 4631

Also on InfraLens for IS 10086

6Key values 2QA/QC templates 4FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes

! Acid etching (Clause 3.1) is a hazardous process. In modern practice, mechanical methods like grinding or shot blasting are often preferred for safety, environmental, and control reasons.

! Thoroughly neutralizing and rinsing the surface after acid etching is critical. Any residual acid will cause premature failure of the applied finish.

! The moisture content check (Clause 2.1.1) is crucial before applying epoxy or other moisture-sensitive coatings. Applying them on damp concrete can cause blistering and delamination.

Frequently referenced clauses

Cl. 2Preparation of Surfaces Cl. 2.1New Concrete Surfaces Cl. 2.2Old Concrete Surfaces Cl. 3Treatment of Surfaces Cl. 3.1Acid Etching Cl. 3.2Sand or Grit Blasting

concreteplasterpaintepoxycoatings

International Equivalents

Similar International Standards

ICRI 310.2R-2013International Concrete Repair Institute (ICRI), USA

HighCurrent

Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, Polymer Overlays, and Concrete Repair

Provides a comprehensive guide to mechanical and chemical surface preparation methods, aligning with IS 10086 but with modern quantitative metrics.

ASTM D4258-05(2018)ASTM International, USA

HighCurrent

Standard Practice for Surface Cleaning Concrete for Coating

Directly addresses the cleaning aspect of surface preparation, covering methods like water cleaning, detergent scrubbing, and cleaning for oil/grease.

BS EN 1504-10:2016British Standards Institution / European Committee for Standardization, UK/EU

MediumCurrent

Products and systems for the protection and repair of concrete structures. Site application of products and systems and quality control of the works

Covers the entire application process where surface preparation is a critical preliminary step, linking it to the performance of the overall system.

ASTM D4260-05(2018)ASTM International, USA

HighCurrent

Standard Practice for Liquid and Gelled Acid Etching of Concrete

Specifically details the acid etching procedure, a method also described in IS 10086, providing a direct procedural counterpart.

Key Differences

≠IS 10086 uses qualitative, descriptive terms for surface roughness ('roughened surface'). Modern standards like ICRI 310.2R introduce the quantitative 'Concrete Surface Profile' (CSP 1-10) scale, allowing precise specification of the required texture.

≠IS 10086, being from 1982, does not cover modern preparation techniques like ultra-high-pressure (UHP) water jetting, shot blasting, or scarifying in detail, which are standard in current international practice.

≠International standards place a stronger emphasis on health, safety, and environmental concerns, particularly regarding the use of silica sand for abrasive blasting (due to silicosis risk) and the containment/disposal of hazardous waste from cleaning or etching.

≠Modern standards like BS EN 1504 adopt a 'system-based' approach, where the surface preparation method is explicitly linked to the performance requirements of the specific coating or repair system being applied. IS 10086 is a more generic, standalone guide.

≠Moisture testing in international standards (e.g., ASTM F2170 for in-situ RH) is more advanced and quantitative than the simple dampness tests implied in IS 10086, providing more reliable data for applying moisture-sensitive finishes.

Key Similarities

≈All standards share the fundamental objective: to achieve a clean, sound, and contaminant-free concrete substrate to ensure proper adhesion of the applied finish.

≈The necessity of removing laitance, efflorescence, curing compounds, form-release agents, oil, and grease is a common principle emphasized across both the IS code and its international counterparts.

≈The core mechanical and chemical preparation methods, such as wire brushing, abrasive (sand) blasting, and acid etching, are foundational techniques described in both IS 10086 and standards like the ASTM D4258/D4259/D4260 suite.

≈All standards recognize the importance of repairing surface defects like cracks, spalls, and honeycombs by removing all unsound material down to a solid substrate before the application of any finish.

Parameter Comparison

Parameter	IS Value	International	Source
Surface Profile Definition	Qualitative descriptions like 'roughened by wire brush' or 'light sand blasting'.	Quantitative Concrete Surface Profile (CSP) scale from 1 (smoothest) to 10 (most profiled).	ICRI 310.2R-2013
Acid Etching Solution	Muriatic acid (HCl) diluted 1:1 to 1:2 with water.	10-15% muriatic acid solution; also allows for sulfamic or phosphoric acids.	ASTM D4260-05(2018)
Moisture Test Method	General recommendation for checking dampness (implies methods like a simple surface test).	Plastic Sheet Method: 18x18 in (457x457 mm) plastic sheet taped for 16 hours to check for condensation.	ASTM D4263-83(2018)
Crack Repair Preparation	Cut into a V-groove, not less than 6 mm wide, before filling.	Prepare cracks by routing or sawing; the geometry is dependent on the type of repair material and sealant to be used.	ICRI 310.2R-2013
Checking for Soundness	Tapping the surface with a hammer.	Systematic sounding with a hammer or chain dragging to identify delaminated areas.	ASTM D4580 / ICRI 310.2R-2013
Neutralization after Acid Etch	Not explicitly detailed, relies on thorough water washing.	Wash with a solution of ammonia or sodium bicarbonate (1 lb/5 gal water), followed by fresh water rinsing.	ASTM D4260-05(2018)

⚠ Verify details from original standards before use

Key Values6

Quick Reference Values

Minimum curing period for new concrete before finishing28 days

Maximum moisture content before applying most finishes5 percent

Solution for removing oil/grease (Trisodium Phosphate)1 kg in 5 litres of hot water

Neutralizing solution for acid etching (soda ash)1 kg in 20 litres of water

Neutralizing solution for acid etching (lime)1.5 kg in 20 litres of water

Typical acid etching solution1 part commercial HCl to 1-2 parts water

Tables & Referenced Sections

Key Tables

No tables data

Key Clauses

Clause 2 - Preparation of Surfaces

Clause 2.1 - New Concrete Surfaces

Clause 2.2 - Old Concrete Surfaces

Clause 3 - Treatment of Surfaces

Clause 3.1 - Acid Etching

Clause 3.2 - Sand or Grit Blasting

Frequently Asked Questions4

How long should new concrete cure before painting?+

A minimum of 28 days is required, and the surface should be dry with moisture content not exceeding 5% (Clause 2.1.1).

How can I remove oil and grease stains from an old concrete floor?+

Scrub the area with a solution of 1 kg trisodium phosphate in 5 litres of hot water, or a suitable solvent, and then rinse thoroughly with clean water (Clause 2.2.3.2).

What is the purpose of acid etching a concrete surface?+

To remove the weak, non-absorbent laitance layer and to roughen the surface, which creates a better mechanical bond for the subsequent finish or coating (Clause 3.1).

What are the alternatives to acid etching for surface preparation?+

Mechanical methods such as sand/grit blasting (Clause 3.2), mechanical grinding (Clause 3.3), or high-pressure water jetting are common and effective alternatives.

QA/QC Inspection Templates

Code-Specific Templates for IS 10086

📋

Test Equipment Calibration Register

Excel / PDF

📋

Lab Test Equipment Register

Excel / PDF

IS 10086 : 1982Code of Practice for Preparation and Treatment of Surfaces of Concrete for Application of Finishes

PDF Google Compare BIS Portal

Link points to Internet Archive / others. Not hosted by InfraLens. Details

ICRI 310.2R · ASTM D4258-05(2018) · BS EN 1504-10

CurrentSpecializedCode of PracticeBIMMaterials Science · Demolition, Renovation and Repair of Structures

PDF Google Compare BIS Portal

Link points to Internet Archive / others. Not hosted by InfraLens. Details

Provides a code of practice for the proper preparation and treatment of concrete surfaces before applying finishes or repair materials.

Overview

Status: Current
Usage level: Specialized
Domain: Materials Science — Demolition, Renovation and Repair of Structures
Type: Code of Practice

International equivalents

Typically used with

IS 2395 IS 1303 IS 4631

Also on InfraLens for IS 10086

6Key values 2QA/QC templates 4FAQs

BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.

Practical Notes

! Acid etching (Clause 3.1) is a hazardous process. In modern practice, mechanical methods like grinding or shot blasting are often preferred for safety, environmental, and control reasons.

! Thoroughly neutralizing and rinsing the surface after acid etching is critical. Any residual acid will cause premature failure of the applied finish.

! The moisture content check (Clause 2.1.1) is crucial before applying epoxy or other moisture-sensitive coatings. Applying them on damp concrete can cause blistering and delamination.

Frequently referenced clauses

Cl. 2Preparation of Surfaces Cl. 2.1New Concrete Surfaces Cl. 2.2Old Concrete Surfaces Cl. 3Treatment of Surfaces Cl. 3.1Acid Etching Cl. 3.2Sand or Grit Blasting

concreteplasterpaintepoxycoatings

International Equivalents

Similar International Standards

ICRI 310.2R-2013International Concrete Repair Institute (ICRI), USA

HighCurrent

Selecting and Specifying Concrete Surface Preparation for Sealers, Coatings, Polymer Overlays, and Concrete Repair

Provides a comprehensive guide to mechanical and chemical surface preparation methods, aligning with IS 10086 but with modern quantitative metrics.

ASTM D4258-05(2018)ASTM International, USA

HighCurrent

Standard Practice for Surface Cleaning Concrete for Coating

Directly addresses the cleaning aspect of surface preparation, covering methods like water cleaning, detergent scrubbing, and cleaning for oil/grease.

BS EN 1504-10:2016British Standards Institution / European Committee for Standardization, UK/EU

MediumCurrent

Products and systems for the protection and repair of concrete structures. Site application of products and systems and quality control of the works

Covers the entire application process where surface preparation is a critical preliminary step, linking it to the performance of the overall system.

ASTM D4260-05(2018)ASTM International, USA

HighCurrent

Standard Practice for Liquid and Gelled Acid Etching of Concrete

Specifically details the acid etching procedure, a method also described in IS 10086, providing a direct procedural counterpart.

Key Differences

Key Similarities

≈All standards share the fundamental objective: to achieve a clean, sound, and contaminant-free concrete substrate to ensure proper adhesion of the applied finish.

Parameter Comparison

Parameter	IS Value	International	Source
Surface Profile Definition	Qualitative descriptions like 'roughened by wire brush' or 'light sand blasting'.	Quantitative Concrete Surface Profile (CSP) scale from 1 (smoothest) to 10 (most profiled).	ICRI 310.2R-2013
Acid Etching Solution	Muriatic acid (HCl) diluted 1:1 to 1:2 with water.	10-15% muriatic acid solution; also allows for sulfamic or phosphoric acids.	ASTM D4260-05(2018)
Moisture Test Method	General recommendation for checking dampness (implies methods like a simple surface test).	Plastic Sheet Method: 18x18 in (457x457 mm) plastic sheet taped for 16 hours to check for condensation.	ASTM D4263-83(2018)
Crack Repair Preparation	Cut into a V-groove, not less than 6 mm wide, before filling.	Prepare cracks by routing or sawing; the geometry is dependent on the type of repair material and sealant to be used.	ICRI 310.2R-2013
Checking for Soundness	Tapping the surface with a hammer.	Systematic sounding with a hammer or chain dragging to identify delaminated areas.	ASTM D4580 / ICRI 310.2R-2013
Neutralization after Acid Etch	Not explicitly detailed, relies on thorough water washing.	Wash with a solution of ammonia or sodium bicarbonate (1 lb/5 gal water), followed by fresh water rinsing.	ASTM D4260-05(2018)

⚠ Verify details from original standards before use

Key Values6

Quick Reference Values

Minimum curing period for new concrete before finishing28 days

Maximum moisture content before applying most finishes5 percent

Solution for removing oil/grease (Trisodium Phosphate)1 kg in 5 litres of hot water

Neutralizing solution for acid etching (soda ash)1 kg in 20 litres of water

Neutralizing solution for acid etching (lime)1.5 kg in 20 litres of water

Typical acid etching solution1 part commercial HCl to 1-2 parts water

Tables & Referenced Sections

Key Tables

No tables data

Key Clauses

Clause 2 - Preparation of Surfaces

Clause 2.1 - New Concrete Surfaces

Clause 2.2 - Old Concrete Surfaces

Clause 3 - Treatment of Surfaces

Clause 3.1 - Acid Etching

Clause 3.2 - Sand or Grit Blasting

Frequently Asked Questions4

How long should new concrete cure before painting?+

A minimum of 28 days is required, and the surface should be dry with moisture content not exceeding 5% (Clause 2.1.1).

How can I remove oil and grease stains from an old concrete floor?+

Scrub the area with a solution of 1 kg trisodium phosphate in 5 litres of hot water, or a suitable solvent, and then rinse thoroughly with clean water (Clause 2.2.3.2).

What is the purpose of acid etching a concrete surface?+

To remove the weak, non-absorbent laitance layer and to roughen the surface, which creates a better mechanical bond for the subsequent finish or coating (Clause 3.1).

What are the alternatives to acid etching for surface preparation?+

Mechanical methods such as sand/grit blasting (Clause 3.2), mechanical grinding (Clause 3.3), or high-pressure water jetting are common and effective alternatives.