Uniroc Grout

PRODUCT DESCRIPTION

UNIROC GROUT is supplied as ready to use dry cementitious powder requiring only the correct amount of prescribed water to produce a flowing non-shrink grout for gap thickness of 10-75 mm. UNIROC GROUT is a blend of Portland cements, specially graded fillers that assist uniform mixing and chemical additives that ensure low water demand and high early strengths.

PROPERTIES

At flowable consistency (3.4 – 4.5 litres of water per 25-kg bag of UNIROC GROUT at 20 oC) the following results were obtained:

Compressive strength: 18 N/mm2 @ 24 hrs — 40 N/mm2 @ 7 days — 58 N/mm2 @ 28 days
Flexural strength: 2.5 N/mm2 @ 24 hrs — 7.5 N/mm2 @ 7 days — 9.5 N/mm2 @ 28 days
Density: 2080 kg/m3

APPLICATION

Preparation
The substrate surface must be free of oil, grease or any loosely held material. Pre-soaking is necessary for a minimum of 2 hours prior to grouting. Any free water should be removed before grouting begins. The base plate should be clean of oil, grease or scale. Formwork should be constructed to be leak proof, achieved by using PS sealant or foam rubber strip between the joints.

Mixing
For best results a mechanical powdered grout mixer should be used for quantities up to 50 Kg. For larger quantities use a high shear vane mixer. It is advised that the grouting operation is carried out in a continuous fashion. The water needed should be accurately measured and placed first into the mixer. The grout is then added slowly and mixed continuously for 5 minutes so as to ensure a smooth and even consistency.
To achieve the correct consistency, the amount of clean water that is added to a 25-Kg bag at 20 oC is:

Flowable: 4.0 - 4.5 litres.
Trowellable: 3.4 - 3.6 litres.

When ambient temperatures exceed 35-oC cool water (below 20 oC) should be used for mixing the grout.

Placement
Place the grout as soon as the mixing is finished but not later than 20 minutes, to gain the full benefit of expansion process.
UNIROC GROUT may be placed in thickness up to 75 mm in a single pour when used as an under plate grout. Any bolt pockets must be grouted prior to grouting between the substrate and the base plate. Continuous grout flow is essential. Pouring should be from one side of the void to eliminate the entrapment of air.

Curing
On completion of the grouting operation, exposed areas should be thoroughly cured with a curing membrane or continuous application of water or by using a wet hessian.