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IS 4443 : 1980Code of practice for the use of resin-type chemical-resistant mortars

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ASTM C399 / C399M - 18 · DIN EN 14879-4 · ISO 13007-3
CurrentSpecializedCode of PracticeMaterials Science · Flooring, Wall Finishing and Roofing
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OverviewValues3InternationalTablesFAQ3Related

IS 4443:1980 is the Indian Standard (BIS) for the use of resin-type chemical-resistant mortars. This code lays down recommendations for the storage, mixing, application, and curing of resin-type chemical-resistant mortars used for bonding acid-resistant bricks and tiles. It covers phenolic, furan, epoxy, and polyester resin mortars primarily used in aggressive industrial and chemical environments.

Code of practice for the use of resin-type chemical-resistant mortars

Overview

Status
Current
Usage level
Specialized
Domain
Materials Science — Flooring, Wall Finishing and Roofing
Type
Code of Practice
International equivalents
ASTM C399 / C399M - 18 · ASTM International, USADIN EN 14879-4:2007-06 · Deutsches Institut für Normung (DIN) / European Committee for Standardization (CEN), Germany/EUISO 13007-3:2010 · International Organization for Standardization (ISO), International
Typically used with
IS 4860IS 4441IS 4442
Also on InfraLens for IS 4443
3Key values3FAQs
Practical Notes
! Resin mortars are highly sensitive to temperature; high temperatures drastically reduce pot life, while low temperatures delay curing.
! Ensure the substrate is completely dry and free from dust, oil, and grease before application to achieve the required bond strength.
! Mix only the amount of mortar that can be consumed within its pot life to avoid material wastage and premature hardening in the mixing vessel.
Frequently referenced clauses
Cl. 4Storage of MaterialsCl. 5Proportioning and MixingCl. 6ApplicationCl. 7Curing
Pulled from IS 4443:1980. Browse the full clause & table index below in Tables & Referenced Sections.
resin mortarepoxypolyesterphenolicfuranchemical-resistant mortar

International Equivalents

Similar International Standards
ASTM C399 / C399M - 18ASTM International, USA
HighCurrent
Standard Practice for Use of Chemical-Resistant Resin Mortars
Directly equivalent in scope, covering the installation and use of chemical-resistant resin mortars.
DIN EN 14879-4:2007-06Deutsches Institut für Normung (DIN) / European Committee for Standardization (CEN), Germany/EU
MediumCurrent
Organic coating systems and linings for protection of industrial apparatus and plants against corrosion caused by aggressive media - Part 4: Linings on metallic components based on mortar-linings
Covers the application of resin mortars specifically for corrosion-resistant linings, a major use-case.
ISO 13007-3:2010International Organization for Standardization (ISO), International
Low-to-MediumCurrent
Ceramic tiles — Grouts and adhesives — Part 3: Terms, definitions and specifications for grouts
Specifies materials (reaction resin grouts) used in tiling, which is a subset of the applications covered by IS 4443.
Key Differences
≠IS 4443 is a descriptive 'code of practice' from 1980, while modern standards like ASTM C399 are more prescriptive, heavily referencing specific test methods, quality control procedures, and worker qualifications.
≠Modern standards extensively defer to the manufacturer's specific instructions for mixing, handling, and curing, acknowledging the proprietary nature of advanced resin systems. IS 4443 provides more generalized guidance.
≠The classification in IS 4443 is based on fundamental resin chemistry (Phenolic, Furane, Epoxy). Modern standards (e.g., ISO 13007) use a performance-based classification system (e.g., 'RG' for Reaction Grout) supplemented by characteristics like abrasion resistance.
≠Contemporary international standards include detailed and explicit requirements for health, safety, and environmental protection (e.g., handling, VOCs, SDS), which are largely absent or minimal in the 1980 Indian code.
Key Similarities
≈All standards emphasize the same fundamental principles for successful application, most critically the need for a clean, dry, sound, and properly prepared substrate.
≈The basic material categories of Epoxy, Furane, and Polyester mortars are common ground, forming the core of chemical-resistant mortar technology in both the old and new standards.
≈There is a shared understanding of the critical effect of temperature on the material's working time (pot life) and curing speed, with all codes advising against application in cold conditions.
≈The fundamental application sequence remains consistent: proper proportioning and mixing, applying the mortar, tooling the joints to ensure full contact and compaction, and protecting the work during the curing period.
Parameter Comparison
ParameterIS ValueInternationalSource
Recommended Application TemperaturePreferably between 20°C and 35°C; shall not be applied below 10°C.Optimum working temperature is 70°F to 80°F (21°C to 27°C).ASTM C399 / C399M - 18
Recommended Bed Joint Thickness3 mm to 10 mmNot specified; width and depth shall be as required by the design engineer's drawings and specifications.ASTM C399 / C399M - 18
Concrete Surface PreparationClean surface by wire brushing, chipping, sand or grit blasting.Surface must be prepared to a specific Concrete Surface Profile (CSP) per ICRI 310.2, typically CSP 3-5 for mortar applications.ASTM C399 / C399M - 18
Initial Cure Before Chemical ServiceMinimum 7 days at 27°C.Varies by product and service; full chemical resistance may take 7 to 14 days at 73°F (23°C). Follow manufacturer's recommendation.ASTM C399 / C399M - 18
Material Shelf LifeGenerally 6 to 12 months when stored below 30°C.As stated by the manufacturer on the packaging or technical data sheet.ASTM C399 / C399M - 18
Mixing MethodMix for about 3 minutes till uniform. Manual mixing for small quantities is permitted.Mechanical mixing with a low-speed mixer is recommended. Mix according to manufacturer's instructions.ASTM C399 / C399M - 18
⚠ Verify details from original standards before use

Key Values3

Quick Reference Values
Typical mortar joint thickness3 mm to 6 mm
Minimum curing time before chemical exposure7 days at 27°C
Pot life at ambient temperature20 to 40 minutes

Tables & Referenced Sections

Key Tables
No tables data
Key Clauses
Clause 4 - Storage of Materials
Clause 5 - Proportioning and Mixing
Clause 6 - Application
Clause 7 - Curing

Related Resources on InfraLens

Cross-Referenced Codes
IS 4860:1991Facing Bricks - Specification
→
IS 4441:1980Code of practice for the use of silicate-type...
→
IS 4442:1980Code of practice for the use of sulphur-type ...
→

Frequently Asked Questions3

What is the recommended joint thickness for resin-type chemical resistant mortars?+
Usually 3 mm to 6 mm, depending on the specific application and masonry unit.
How long should the mortar cure before being subjected to chemical loads?+
A minimum of 7 days at an ambient temperature of 27°C is typically required.
What types of resins are covered for mortar formulation in this code?+
The code primarily covers phenolic, furan, epoxy, and polyester resins.

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