SikaGrout®-928

See information given on product packaging.

Store at ambient temperatures, out of direct sunlight, in cool, dry warehouse conditions and clear of the ground on pallets protected from rainfall prior to application. No permanent storage over +30 °C.

All data determined at +21 °C.

≥ 23,000 N/mm²

All data determined at +21 °C.

Use the water demand given on the product packaging. Do not exceed maximum water amount!

+5 °C to +30 °C

+5 °C to +30 °C

+5 °C to +30 °C

Approx. 60 minutes

Removal of formwork after approx. 12 hours (at +20 °C).

Approx. 2.2 kg/l

Approx. 1,900 kg powder is needed to prepare 1 m³ of fresh mortar.

One 25 kg bag will yield 12 to 13 litres of grout depending on the water demand used.

The performance, durability and safety of the installed product used for anchoring steel (rebar), bolts and screws strongly depend on the substrate, the dimensions of the element, the drilling and cleaning of holes, the substrate temperature and the type of anchoring bolt or bar. It is therefore important that a proper structural assessment of the structural elements to be repaired is carried out by qualified engineers, and that the choice of products, anchor types etc. is based upon such assessment

The concrete should be free of frost, curing membranes, waterproofing treatments, oil stains, laitance, friable material and dust.

The concrete surfaces should be chipped and if there is a water leakage it must be drained or properly plugged. Saturate the cleaned foundation and any bolt holes with water for at least 6 hours, preferably 24 hours.

Just before grouting, surfaces should be damp, but free of standing water. Particular attention should be paid to bolt holes to ensure that these are water-free. Use oil free compressed air to blow out bolt holes and pockets as necessary.

Base plates, bolts, etc. must be clean and free of oil, grease and paint etc. Set and align equipment. If shims are to be removed after the grout has set, then lightly grease them for easy removal.

The formwork must fit tightly against the substrate and, when grouting material around machines, it has to be at least 2 cm higher than the bottom of the plate to be underpoured. Ensure formwork is secure and watertight to prevent movement and leaking during the placing and curing of the grout.

The area should be free of excessive vibration. Shut down adjacent machinery until the grout has hardened.

In hot weather, base plates and foundations must be shaded from direct sunlight. Bags of grout should be stored in the shade prior to use.

In cold weather, the temperature of base plates and foundations should be raised to over +5 °C.

Use one or more mixers to permit mixing and placing operations to proceed simultaneously without interruption. Stick to the water amounts given on the bag.

Mix with clean water only. Put the minimum water amount in the mixer first, then slowly and steadily add the grout. Mix until homogeneous mortar (2-3 minutes), add more water if required and continue to mix for at least 2 more minutes.

Do not exceed the maximum water amount!

Do not retemper grout by adding water or remixing after it stiffens. Do not add cement, sand or other materials to SikaGrout®-928.

Before grouting, determine if there is excess vibration of the foundation or baseplate caused by nearby operating equipment. Shut down this source of vibration until after the newly-placed grout has taken final set.

Pour mixed SikaGrout®-928 grout into the voids without interruption. The mortar flow can be improved by moving chains or wire slings in the fresh mortar when areas are inaccessible. The grout shall be poured continuously and from one side only, to avoid entrapment of air while grouting. Make sure the mortar fills the entire space to be grouted and remains in contact with the plate throughout the entire grouting placement.

Where grout must flow some distance, make the initial batch slightly more fluid or flowable than required; this lubricates the surfaces and avoids blockage of the grout that follows.

Due to differences in temperature between the grout under the base plate, and exposed shoulders that are subject to more rapid temperature changes, debonding or cracking can occur. Avoid shoulders wherever possible. If shoulders are required, they should be firmly anchored with reinforcement to the substrate to prevent debonding.

SikaGrout®-928 grout is suitable for use with most types of pumping equipment.

Note: Do not use vibrator for placing the grout!

Immediately after SikaGrout®-928 is placed, cover all exposed grout with clean wet hessian and keep moist by covering with polythene.

Tools and mixer must be cleaned immediately after use with water. Cured material can only be removed mechanically.