IS 4651:1968 is the Indian Standard (BIS) for screed board vibrators for concrete - specification. This standard prescribes the specifications, constructional details, and performance requirements for screed board vibrators used for the compaction and levelling of shallow concrete layers such as road pavements, floor slabs, and roof slabs.
Specifies requirements for screed board vibrators used for compacting concrete slabs and pavements.
Overview
- Status
- Current
- Usage level
- Specialized
- Domain
- General — Scaffolding, Formwork and Construction Equipment
- Type
- Specification
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Practical Notes
! Screed board vibrators are generally effective only for shallow concrete layers (typically up to 150 mm depth). For deeper sections, internal immersion vibrators must be used in conjunction.
! Ensure uniform movement of the screed board across the concrete surface to prevent uneven compaction, segregation, and surface irregularities.
! The vibrating unit must be securely bolted to the screed board to prevent dampening of the vibration energy.
Frequently referenced clauses
concrete
International Equivalents
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Key Values2
Quick Reference Values
minimum operating frequency3000 vibrations per minute
effective compaction depth limit150 mm
Tables & Referenced Sections
Key Clauses
Clause 3 - Materials
Clause 4 - Constructional Requirements
Clause 5 - Motive Power
Clause 6 - Performance Requirements
Frequently Asked Questions3
What is the primary application of screed board vibrators?+
They are primarily used for levelling and compacting shallow, wide concrete surfaces like floors, pavements, and roof slabs.
What is the limitation on concrete depth for a screed vibrator?+
It is generally effective for compacting concrete up to a depth of about 150 mm to 200 mm.
What is the required minimum frequency of vibration?+
Screed board vibrators typically operate at a minimum frequency of 3000 vibrations per minute to ensure proper consolidation.
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.