Capping Gypsum Compound Manufacturer,Supplier and Exporter in India
Product Code : TVT-CTE-10467
Capping Gypsum Compound is a high-strength gypsum-based capping material offering a faster, safer, and cheaper alternative to sulfur-mortar capping, rubber-pad capping, or end-grinding for preparing concrete cylinder specimen ends before compression testing.
How It Works
The gypsum compound is mixed with water in the specified ratio and applied to the cylinder end while still workable, then allowed to cure for around 30 minutes before the specimen is compression tested. Because it cures at room temperature and needs no melting pot or open flame, it avoids the burn and fume hazards associated with molten sulfur-mortar capping, while still achieving high compressive strength in the cured cap so it does not fail before the concrete specimen itself during testing.
Technical Specifications
| Parameter | Specification |
|---|---|
| Compressive Strength (Mix 1) | 350 kgf/cm² / 5000 psi |
| Compressive Strength (Mix 2) | 630 kgf/cm² / 9000 psi |
| Water Mix Ratio (Mix 1) | 23 - 24% |
| Water Mix Ratio (Mix 2) | 15.5 - 16% |
| Curing Time | 30 minutes (both mixes) |
| Pack Weight | 25 kg/pack (both mixes) |
Applications
Used as a capping medium for concrete cylinder specimen end preparation before compressive strength testing, per ASTM C617, which permits high-strength gypsum cement compound as an alternative to sulfur-mortar capping.
Related Products & Category
This machine is part of the Concrete Testing Equipments range at Tvet Equipments. Related machines include: Cylinder Capping Equipment, Cylinder Capping Sandbox Method.
Frequently Asked Questions
Why choose gypsum capping compound over sulfur-mortar capping?
It is faster (30-minute cure vs. melting and setting sulfur mortar), avoids the burn/fume hazards of molten sulfur, and is generally cheaper, while still meeting the high-strength capping requirements of ASTM C617.
What compressive strength does the cured cap reach?
Depending on the mix ratio used, either approximately 350 kgf/cm² (5000 psi) or 630 kgf/cm² (9000 psi) after 30 minutes of curing.
How much water is needed to mix the compound?
23-24% water by weight for the 5000 psi mix, or 15.5-16% water by weight for the higher-strength 9000 psi mix.
Request a Quote
Looking to buy or get pricing for this machine? Request a quote from Tvet Equipments and our team will get back to you with indicative pricing and lead times.
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