The 2002 edition of IS 5317 outlines the specifications and testing protocols for pitch-mastic, a surfacing compound used on bridge decks and roadways. It covers the formulation, physical attributes, production methods, and quality assurance practices to guarantee the material's longevity, skid resistance, and ability to withstand traffic loadings. This standard is vital for professionals involved in highway and bridge surfacing to ensure conformity to Indian regulations for safety and durability.
Overview
The 2002 edition of IS 5317 outlines the specifications and testing protocols for pitch-mastic, a surfacing compound used on bridge decks and roadways. It covers the formulation, physical attributes, production methods, and quality assurance practices to guarantee the material's longevity, skid resistance, and ability to withstand traffic loadings. This standard is vital for professionals involved in highway and bridge surfacing to ensure conformity to Indian regulations for safety and durability.
Audience
Contents
Structure
This section defines the coverage of pitch-mastic used on bridges and roads, detailing physical characteristics, composition, and testing methods for the bituminous material. It includes tables specifying bitumen properties such as softening point, penetration, ductility, heating loss, and solubility, along with pitch-mastic composition percentages according to IS 1195 Annex D.
Outlines terminology as per IS 334:1982 related to bitumen and tar. Covers rules for numerical rounding in test results according to IS 2:1960 and explains requirements for certification marking under the BIS Act 1986.
Details physical requirements for bitumen including softening point, penetration, ductility, heating loss, and solubility. Specifies typical binder grades and the grading of aggregates used in pitch-mastic. Composition limits for pitch-mastic components are provided.
Describes the manufacturing process including bitumen and fine aggregate mixing, temperature controls, and hardness number requirements before and after addition of coarse aggregates to ensure consistent quality.
Specifies the physical property ranges for bitumen and pitch-mastic such as softening point, penetration, ductility, and hardness. Emphasizes adherence to IS test methods and rounding rules.
Defines the sampling procedure with detailed identification requirements for specimens, including issuing authority, sample number, material type, mixing details, and testing requirements. Explains conformity criteria and rounding off test results.
Details standardized testing methods for bitumen and pitch-mastic properties such as softening point, penetration, ductility, heating loss, and solubility, referring to relevant IS test codes.
Covers the use of BIS Standard Mark governed by the BIS Act 1986, licensing procedures, and product identification protocols including sample labeling and documentation.
Specifies storage practices for bitumen blocks including marking with manufacturing date and manufacturer name. Highlights physical property retention and handling precautions.
While no dedicated clause exists, the standard’s quality controls for bitumen properties indirectly ensure environmental compliance by limiting emissions and ensuring pure, stable binders for safe use.
Lists all related IS codes referenced for testing and terminology, including IS 73, IS 334, IS 702, IS 1195, and others essential for compliance.
Identifies the committee responsible for IS 5317 development, likely the Flooring, Wall Finishing and Roofing Sectional Committee (CED 5), and summarizes key tables on pitch-mastic composition and analysis.
Frequently Asked
IS 5317 (2002) recommends selecting bitumen grades based on pavement temperature conditions. For surfaces where temperatures exceed 50°C, harder bitumen grades such as VG 40 or VG 50 are advised to prevent softening and bleeding. The bitumen content in pitch-mastic should be between 14% and 17% by mass, and bitumen is typically heated to 170–180°C before mixing with aggregates. This ensures the mastic’s durability and performance under high temperature conditions.
The hardness number is measured using a durometer at 25°C. Before adding coarse aggregates, pitch-mastic should have a hardness number between 60 and 80 to ensure adequate plasticity. After incorporation of coarse aggregates, the hardness reduces to a range of 10 to 20. These values guarantee proper workability and durability during laying and service.
Pitch-mastic composition requires hard, durable crushed rock aggregates with an Aggregate Impact Value not exceeding 20 and an Abrasion Value below 40. Coarse aggregates sized between 6 and 20 mm should constitute 30% to 50% by mass of the final mix. Additionally, an anti-skid surface involves applying 12 to 20 mm coarse or carborundum aggregates coated with 2–3% bitumen (S95 or S65 grade) and 2–3% filler, spread at 2 to 13 kg/m² and embedded into the hot mastic layer.
The reheating of pitch-mastic blocks should be maintained between 170°C and 205°C to avoid binder degradation. Mixing temperatures during sample discharge must be within 150°C to 205°C. Coarse aggregates are added at sizes of 6 to 20 mm, comprising 30% to 50% by mass. Maintaining these temperature ranges ensures uniform mixing, hardness consistency, and overall quality of the final product.
Anti-skid properties are attained by spreading a layer of coarse or carborundum aggregates sized 12 to 20 mm over the hot and plastic pitch-mastic surface. These aggregates are pre-coated with 2–3% bitumen (S95 or S65 grade) and 2–3% filler to enhance adhesion. The aggregate layer is then compacted firmly into the mastic. Verification is done using a pump integrator test to confirm proper embedment and skid resistance.
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