The standard IS 9197-1979 defines the specifications and testing protocols for epoxy resins, hardeners, and their compositions tailored for floor topping applications. It addresses parameters such as mechanical strength, chemical resistance, and packaging to guarantee reliable and long-lasting epoxy flooring solutions. This document is crucial for professionals involved in the production, testing, and application of epoxy resin flooring systems in industrial and commercial settings.
Overview
The standard IS 9197-1979 defines the specifications and testing protocols for epoxy resins, hardeners, and their compositions tailored for floor topping applications. It addresses parameters such as mechanical strength, chemical resistance, and packaging to guarantee reliable and long-lasting epoxy flooring solutions. This document is crucial for professionals involved in the production, testing, and application of epoxy resin flooring systems in industrial and commercial settings.
Audience
Contents
Structure
This section outlines the purpose and application of the code for epoxy resin floor toppings, highlighting purchaser options as per specific clauses and ensuring harmonization with international standards and Indian practices. It also explains rounding off test results in accordance with IS 2-1960.
Provides definitions based on IS 4631-1968 relevant to epoxy resin floor topping practices, along with essential tables specifying epoxy resin grades and liquid coal tar properties.
Details the requirements for epoxy resins (Grade 1 and Grade 2) including epoxy content, viscosity, specific gravity, and hydrolyzable chlorine limits. It also presents specifications for hardeners including their types, viscosity, amine value, specific gravity, usage amounts, and remarks on their curing behavior.
Covers essential properties such as pot life, epoxy resin grades, hardener types, and mechanical and physical properties for floor topping applications. Mechanical strength parameters like compressive, tensile, flexural, and shear strengths are detailed alongside thermal and wear resistance properties.
Describes the methods for sampling from each lot, and criteria for acceptance or rejection based on test results. It explains the protocol for testing initial and second samples to ensure stringent quality control.
Specifies packaging protocols for resins, hardeners, and fillers in sealed containers to avoid contamination. Lists mandatory labeling details including manufacturer, product name, batch or date number, storage instructions, shelf life, and expiry date. Also mentions the optional BIS certification mark for compliance.
Details sampling procedures and conformity criteria to verify quality, including re-testing rules and acceptance or rejection decisions. It also highlights the rounding off of test values and purchaser options for specific clauses.
Frequently Asked
According to IS 9197, epoxy resins are categorized into two main grades: Grade 1, which consists of resins without any diluents, and Grade 2, which includes resins modified with reactive diluents. Grade 1 is further divided into classes, each specified by epoxy content, viscosity, specific gravity, and maximum hydrolyzable chlorine percentage. This classification facilitates the appropriate selection of epoxy resins for floor topping purposes as outlined in the standard.
IS 9197 permits liquid hardeners that react with epoxy resins at temperatures above 5°C. These include aliphatic amines (offering fast or slow curing but sensitive to moisture), aromatic amine adducts (suitable for curing in high humidity and low temperature), polyaminoamides (slow curing with low heat generation), and amino resin compounds (with adjustable pot life and heat output). Each type varies in viscosity, amine value, specific gravity, and recommended dosage, catering to different curing rates and environmental conditions.
The standard prescribes minimum mechanical strength values for epoxy floor toppings measured after seven days of curing. These include a compressive strength of at least 80 N/mm², bond strength of 2 N/mm², flexural strength minimum of 20 N/mm², tensile strength minimum of 15 N/mm², and shear strength not less than 3.2 N/mm². Additional criteria cover modulus of elasticity, thermal expansion limits, shrinkage, water absorption, and wear resistance, ensuring the durability and performance of the flooring system.
Chemical resistance of cured epoxy compositions should be evaluated following IS 9162-1979, referencing specific chemical resistance tables from IS 4631-1968. Wear resistance testing is also conducted as per IS 9162-1979, requiring a minimum of six specimens to be tested. Acceptable wear limits include an average wear depth not exceeding 2 mm and individual specimen wear not exceeding 25 mm, ensuring the flooring's longevity under abrasive conditions.
Sampling must be done from each batch separately, adhering to IS 9197 Clause 5 and Appendix A, to obtain representative test samples. After curing for seven days, samples must meet mechanical and physical property requirements outlined in Table 5, including compressive strength, bond strength, flexural and tensile strengths, modulus of elasticity, thermal properties, shrinkage, water absorption, wear resistance, and shear strength. Compliance with chemical resistance standards is also mandatory. These criteria ensure that the epoxy floor toppings perform reliably in service.
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