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Contact Grout G 

Non-shrink, high resistant, high flow grouts

Description

CONTACT GROUT is a non-shrink, ready to use, high performance grout. It is free from metal aggregates, chlorides and, in general, any gasproducing components. Its high fluidity enables it to fill quickly and easily any bed, however complex. In accordance with the layer thickness, the variant CONTACT GROUT G is used when the thickness is very high.

CONTACT GROUT is a controlled expansion grout. In other words, its expansion fully compensates the irreversible shrinkage that would occur both in the plastic phase and in the hardening of the concrete if normal grouts were used. It is essential here to distinguish between controlled expansion grouts (<0.2%) and free expansion grouts (>0.2%). The latter usually act through the formation of gas, which makes them expand in the plastic state of the concrete, which does not avoid shrinkage during hardening or drying, hence the grout, confined, loses contact with the plate or does not entirely fill the box. At the same time, a small, low-strength layer forms at the top of the grouting, due to the accumulation of gas. The dimensional stability lasts for indefinite time.

Technical Data

• Tipo: Non-shrinkage enhanced cement mortar.
• Aspect: Powder.
• Color: Grey.
• Fresh mortar density::
  • Contact Grout: 2,2 kg/dm³.
  • Contact Grout G: 2,3 kg/dm³.
• Water amount::
  • For fluid consistency::
    • Contact Grout: 16 ± 1%.
    • Contact Grout G: 10 ± 1%.
• Grain size:
  • Contact Grout: 0 - 2 mm.
  • Contact Grout G: 0 - 4 mm.
• Layer thickness:
  • Contact Grout: 15 - 50 mm.
  • Contact Grout G: 40 - 100 mm.
• Expansion coefficient:: Similar to concrete.
• Expansion: < 0,2%.
• Workability time: 50-70 min.
• Start-end setting time: 120-250 min.
• Application temperature: > 5 ºC.
• Mechanical resistance (UNE-83821)*
  • Compression at 1 d:
    • Contact Grout: > 300 kg/cm².
    • Contact Grout G: > 400 kg/cm².
  • Compression at 7 d:
    • Contact Grout: > 400 kg/cm².
    • Contact Grout G: > 600 kg/cm².
  • Compression at 28 d:
    • Contact Grout: > 600 kg/cm².
    • Contact Grout G: > 700 kg/cm².
  • Flexural strength at 28 d:
    • Contact Grout: > 90 kg/cm².
    • Contact Grout G: > 100 kg/cm².
• Non-bleeding.
• Self levelling.
• Not modified by vegetable oils and minerals.

* Fluid consistency. More plastic consistencies enhance its resistance.

Features

Fluidity: Once mixed, CONTACT GROUT acquires a consistency which can vary from plastic to self-levelling, depending on the grouting needs. With the self-levelling consistency, the grout penetrates the formwork or gaps, grouting the entire space without any need for vibration and without any bleeding.

Shrinkage: Under normal conditions, there is no shrinkage during setting or hardening. The grout is also non-bleeding and does not form surface air or gas bubbles that could deteriorate the contact with the plates.

Mechanical resistance: The compressive and the tensile strength of this grout are much higher than those of standard concrete in both early and ultimate stages. Resistance to repeated loads is good due to its uniform density from the base of the filling to the layer in direct contact with the plate.

Other properties: Given its high compactness and its formulation, the grout is resistant to oils, grease and oil products. It is waterproof, nonflammable and non-toxic. Once hardened, it is resistant to extreme temperatures (-50 ºC to +210 ºC).

Application procedure

Mix the mortar with water at a rate given in the Technical Data sheet, to obtain a plastic and fluid consistency.

The bearing surface must be previously saturated with water, removing any excess water. Add CONTACT GROUT to 80% of the necessary water, mix, and add the remaining water after 1 minute, continuing mixing for a further 1-1.5 minutes to remove all lumps.

Do not add water once the grout has been prepared. A vertical axis concrete mixer or a paddle mixer should preferably be used to mix the product.

It is advisable to fill first the boxes of the anchor bolts, allow these to harden and complete the filling 24 hours later.

Curing is required at earlyages. The optimum placing time is up to 20 minutes, depending on the ambient temperature. The adequate temperature for mixing is 10-30ºC.

Tools cleaning: Tools and equipments are cleaned with water immediately after use. If the product hardens, it will be removed mechanically only.

Recommended for

• Machine anchoring.
• Anchoring of crane and travelling crane rails.
• Grouting metal pillars base plates.
• Securing bolts in walls.
• Bridge bearing.
• Joining concretes.
• Assembly of prefabricated concrete structures.
• Underpinning.
• Through bolts.
• Grouting in coke works

Special precautions

CONTACT GROUT is a cementitious product, so rubber gloves should be used for handling it. Goggles are also recommended.

Empty packaging must be disposed of according to the local legal environmental regulations.

Consumption

The yield is approximately 2 kg/m²/mm thickness.

Packaging

CONTACT GROUT / G is supplied in 25 kg bags.

Storage

CONTACT GROUT / G should be kept dry, protected from frost and direct sunlight, in its original, unopened packaging.

In adequate storage conditions, the product has a shelf life of 12 months.

Activities where this product appears:

• 03. Repair and Rehabilitation Systems
• 04. Anchorage Grouting and Injections

The information and technical data in this «Product Guide» are indicative and are subject to change without notice. Are based on ourexperience and knowledge and customary uses and applications of the product. The specified values may suffer some variationsdepending on: conditions of entry into work, manufacturing tolerances, testing, etc. For this reason, our warranty is limited to thequality delivered.For further expansion or consult our Technical Department.
This information supersedes all previously issued.