The standard outlines the specifications for jolting apparatus utilized in preparing specimens to test the transverse strength of plastic mortar in cement evaluation. It details the apparatus's design, dimensions, and operational conditions to guarantee consistent and precise outcomes. This guideline is crucial for manufacturers, testing facilities, and researchers involved in cement quality analysis in India.
Overview
The standard outlines the specifications for jolting apparatus utilized in preparing specimens to test the transverse strength of plastic mortar in cement evaluation. It details the apparatus's design, dimensions, and operational conditions to guarantee consistent and precise outcomes. This guideline is crucial for manufacturers, testing facilities, and researchers involved in cement quality analysis in India.
Audience
Contents
Structure
| Feature | Dimension/Limit |
|---|---|
| Inner face length | 160 ± 0.4 mm |
| Inner face width | 40 ± 0.1 mm |
| Height | 40 ± 0.1 mm |
| Minimum wall plate thickness | 10 mm |
| Angle between faces and base | 90° ± 0.5° |
| Planeness tolerance | 0.02 mm |
| Base plate length | 276 ± 2 mm |
| Base plate width | 240 ± 2 mm |
| Component | Material | Special Instructions |
|---|---|---|
| Table | Mild steel | - |
| Supporting arms | Aluminium | Hardened to minimum 650 Vickers Hardness |
| Spindle | Mild steel | Hardened striking face |
| Projecting lug | Mild steel | Hardened to minimum 650 Vickers Hardness |
| Stop | Mild steel | Wearing face hardened to minimum 650 VH |
| Cam | Mild steel | Hardened to minimum 650 Vickers Hardness |
| Stand | Cast iron | Smooth surface per IS 210-1978 |
| Bracket | Cast iron | Smooth surface per IS 210-1978 |
| Mould | Mild steel | Compliant with IS 226-1975 |
Key dimensions and tolerances for the 40x40x160 mm mould as specified in Clause 4.2:
| Parameter | Measurement |
|---|---|
| Length between inner faces | 160 ± 0.4 mm |
| Width between inner faces | 40 ± 0.1 mm |
| Height | 40 ± 0.1 mm |
| Minimum wall plate thickness | 10 mm |
| Angle between faces & base | 90° ± 0.5° |
| Maximum planeness variation | 0.02 mm |
| Base plate length | 276 ± 2 mm |
| Base plate width | 240 ± 2 mm |
Details on materials and construction requirements:
| Part | Material | Additional Requirements |
|---|---|---|
| Table | Mild steel | Machined surface |
| Supporting arms | Aluminium | Hardened to at least 650 VH |
| Spindle | Mild steel | Hardened striking face |
| Projecting lug | Mild steel | Hardened to minimum 650 VH |
| Stop | Mild steel | Wearing face hardened to minimum 650 VH |
| Cam | Mild steel | Hardened to at least 650 VH |
| Stand | Cast iron | Smooth finish as per IS 210-1978 |
| Bracket | Cast iron | Smooth finish as per IS 210-1978 |
| Mould | Mild steel | Built per IS 226-1975 |
Operating specifications include:
| Specification | Value |
|---|---|
| Cam rotation speed | 60 ± 1 rpm |
| Motor power recommendation | 1/3 hp |
| Combined mass (table, mould, hopper, clamps) | 20 ± 1 kg |
Each component of the jolting apparatus must bear clear and permanent markings including:
Markings should not hinder apparatus functionality.
Additionally, the apparatus may carry the ISI certification mark if licensed under applicable regulations.
Critical points for meeting standard compliance:
Frequently Asked
The mould used in the jolting apparatus must measure 40 x 40 x 160 mm (width x height x length) with specific tolerances such as 160 ± 0.4 mm for length between inner faces and 40 ± 0.1 mm for width and height. The wall plate thickness must be at least 10 mm, and the angle between faces and base should be 90° ± 0.5°. Planeness tolerance should not exceed 0.02 mm. Base plate size is 276 ± 2 mm by 240 ± 2 mm. When unspecified, coarse class deviations from IS 2102:1969 apply, and mould construction must comply with IS 10086-1982. These ensure accurate specimen preparation for cement testing.
The cam mechanism is mounted on the apparatus stand and rotates to actuate a cam follower that lifts and drops the table, providing the jolting action necessary for specimen preparation. The table features a hardened projecting lug engaging with the cam follower. The total mass of the assembly including table, mould, hopper, and clamps is maintained around 20 ± 1 kg. The cam is powered by an electric motor, typically 1/3 hp, with a recommended rotation speed of 60 ± 1 revolutions per minute. A device to automatically stop the motor after 60 jolts is also specified.
Materials must conform to the following: the mould should be made of mild steel as per IS 226-1975, with the hopper constructed from steel or a non-ferrous metal ensuring a tight fit inside the mould compartments. The table and spindle are mild steel, with striking and wearing faces hardened to a minimum of 650 Vickers Hardness. Supporting arms are aluminium hardened similarly. The cam, projecting lug, and stop also require hardened mild steel. The stand and bracket are made from cast iron with a smooth finish meeting IS 210-1978 requirements. These specifications guarantee durability and accuracy in testing.
Each part of the jolting apparatus must be distinctly and permanently marked with the manufacturer's name or registered trademark and the date of manufacture without impairing the equipment's performance. Optionally, the apparatus may bear the ISI certification mark if licensed under the Indian Standards Institution's certification framework. This marking ensures traceability, authenticity, and compliance with quality standards.
IS 10078 specifies the standardized requirements for the jolting apparatus used in preparing specimens for cement testing, ensuring equipment consistency and reliability. IS 4031 outlines the test methods for cement properties such as fineness, setting time, and strength. Together, IS 10078 ensures that the apparatus used in tests defined by IS 4031 delivers reproducible and accurate results, making both standards integral components of comprehensive cement quality assessment.
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