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Submitted by webmaster on 17 مايو 2024

ڤيتوجراوت جي أى 514

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Vetogrout GA514 is a pre-blended powder admixture that contains expansive agents to perform a controlled expansion (in the plastic state) while minimizing water demand. The material is designed to allow uniform mixing and eliminates unwanted segregation and bleeding.

الاستخدامات

  • For post-tensioned bridge deck ducts.
  • For prestressed structural element cable ducts.
  • For slip-form silo tendon ducts.

المزايا

  • Plastic state shrinkage compensation.
  • High early strength promotion.
  • Increased concrete durability & reduced permeability.
  • Compatibility with ordinary Portland cement.

تعليمات الاستخدام

Flood the area with fresh water several hours before grouting.. Immediately before grouting takes place, remove any remaining free water. 

Clean all cable ducts thoroughly . Flush all ducts formed without metal sheaths with water; after that, remove all surplus water. Seal cable anchorages before the duct grouting begins.

For best results, use a mechanically powered grout mixer. Do not use a colloidal impeller mixer if sands/ aggregates are being used. To enable the grouting operation to be carried out continuously, it is essential to provide sufficient mixing capacity and labor onsite. Use a grout holding tank (It’s essential to gently agitate the grout when required).

 For a 6 kg bag of Vetogrout GA514, add 30 to 35 liters of clean water (depending on the nature of cement) to 100 kg of cement to achieve the correct consistency. 

Accurately measure the water into the mixer. Slowly add the Vetogrout GA514 bag’s entire contents with the cement and mix continuously for 5 minutes. This will ensure that the grout has a smooth, even consistency.

Place the Vetogrout GA514 mix within 20 minutes of mixing in annular gaps that are up to 60 mm thick. If needed, use a screw feeding pump (such as a PFT ZP3 booster pump or equivalent).

Use standard curing practices as per ACI recommendation to cure any exposed surfaces of the placed mix but use a curing compound such as Vetocure XT425.

Clean tools and equipment with fresh water. Remove hardened material mechanically.

All sampling procedures for Vetogrout GA514 are to be conducted within the confines of a temperature- controlled laboratory. The reactive agents within Vetogrout GA514 do not permit site sampling and transport. The procedure for sampling is to be as follows: 

1. Select a full and unopened bag of Vetogrout GA514 from the batch allocated for site use and dispatch it to the testing laboratory. 

2. Mix the Vetogrout GA514 in the laboratory following the instructions listed on the product data-sheet. 

3. All sampling shall be conducted using 50 mm cube molds; any other size is not permissible.

4. When mixed, pour the Vetogrout GA514 into 50 mm cube molds, treated with a release agent, in two lifts of 25 mm each with a 60-second interval between pours. The Vetogrout GA514 shall not be tapped, but you can gently tap the cube mold to promote air release. 

5. Fill three 50 mm cube molds with the Vetogrout GA514for each curing time interval specified. (Mold filling should be completed within 15 minutes of the end of the mixing cycle. The filled molds should be stacked three high on top of each other to provide conditions of restraint. Restrain the top mold either with a weighted metal plate or an empty cube mold.) 

6. Store the cubes at a 20°C + 2°C temperature for 24 hours in the laboratory. After 24 hours, place the cubes in a water curing tank maintained at a 20°C + 2°C temperature. Cure the cubes following the standard curing practices.

 7. Crush the cubes in a calibrated compression testing apparatus with a loading rate not exceeding 0.2 - 0.4 N/mm2 per-second. Types of cube fractures are to be recorded. Three cubes are to be crushed for each curing time interval specified. Results are to be calculated and issued as an average.

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