Non-Shrink Grout C80 is a very flowable grout, containing additives for a volume increase in the casting stage, thus compensating the shrinkage from the setting. It fills narrow moulds very well and has a very rapid strength development. Strength Class C80. Especially suitable for demanding precision grouting like machine bed grouting, installation and jointing of concrete panels, and anchoring casting. Frost resistant.
Mould surfaces and concrete substrates must be clean and strong enough. Cement laitance, oil, grease, and other impurities are removed. The mould and concrete substrate surfaces are moistened well prior to the casting work. The surfaces should be so moist that the water from the grout is not absorbed. Excess water is removed by blowing with compressed air or by brushing. The mould is extended upwards on one side (head- box) so that the mould can be filled with the help of the static head of the flowing grout.
For wide grouting moulds openings are left on the opposite side or in suitable places so that the filling of the mould can be monitored. If the grouting contains galvanized reinforcement the zinc layer must be old enough to passivate. Normally 3 – 5 weeks.
Non-Shrink Grout C 80 is developed for both hot and dry climate and for moderate climate. The ambient conditions should be even and stable. The temperature must be over +5oC during the casting work and during the hardening of the grout. In lower temperatures the hardening reaction is slowed down or stopped. The possible strong decrease of the night- time temperature during autumns and winters should be noted and if necessary covering and heating is applied. Too strong sunlight and wind should be avoided during the casting operation.
For the mixing, a pan mixer is recommended. For small castings a tilting drum mixer can be used. The water amount is about 3 litres / 25 kg bag. Note! In order to achieve the designed strength the recommended water amount must be used. Excess water decreases the strength. The mixing time is 4 – 5 minutes. When choosing the mixer size the volume of the grouting should be considered. There should preferably be enough mixed grout for a continuous grouting operation.
The pot life of the mixed grout is about 25 minutes but the grouting should, however, be done as soon as possible after the mixing. This way the timing of the expansion is well utilized and the flow is better. The grout should be mixed in such amount that the grouting can be carried out as continuously as possible. This way, especially in shallow moulds, the advantage of the head box can be fully utilized and the grout will nicely fill even the corners of the mould. The grouting should, if possible, be carried out without vibration, but if necessary the flow is aided by compacting with stick or by gentle vibration.
The recommended maximum layer thickness is about 50 mm. Thicker castings are carried out in multiple layers so that the previous layer has hardened. If thicker grouting is to be done in one layer the grout can be extended by clean and dust free 5 – 10 mm aggregate, about 3 – 5 kg /25 kg bag, and the water amount is kept as small as possible in order to avoid the risk of segregation.
The curing is very important and it should be started as soon as possible after the casting when the casting surface is strong enough to be moistened. Enough water should be used so that even small free surfaces of the grouting are well wetted. The curing is continued with covering the grouting with e.g. plastic film for about one week.
The strength development is fast. In favourable conditions the mortar achieves 70-80 % of its final strength during the first week and about 50% during 1 – 3 days.
Typically de-moulding can be done after about one day and then possible grouting burrs are removed and the surfaces are finished. Later this can be difficult due to the high strength. The final strength is achieved in about four weeks. The development of strength depends, however, on the conditions and slows down or stops in cold conditions and this is to be considered when taking into service.
Unopened bags can be stored in dry conditions for a maximum period of 12 months. On site the material is stored away from the ground, e.g. on wooden pallets, and protected from rain.
The fresh grout is alkaline and irritates the skin and the mucous membranes. Avoid unnecessary contact with the skin. Breath protection is recommended during mixing. Detailed safety instructions can be found in the material safety data sheet.
Our recommendations are based on our tests and on our best knowledge. We can, however, not control, and we are not responsible for, local conditions and workmanship.
|Parin Non Shrink Grout Technical Data|
|Binder||Portland cement Type II|
|Additives||Additives for improvement of the workability and for shrinkage compensation.|
|Aggregate||Dried and fractioned clean limestone, grain size 0-1.2 mm|
|Package Size||25 kg|
|Water demand||About 3 litres/25 kg bag.
Note: Excess water lowers the strength
|Pot life||The pot life of the mixed grout is 25 minutes
Note: Higher temperature shortens the pot life
|Coverage||One 25 kg bag gives about 11 – 12 litres of mixed grout|
|Consumption||The consumption is about 20 kg/m2 dry mix grout for every 10 mm layer thickness|
|Durability||Frost and weather resistant|
|Bulk density||The bulk density of the mixed grout is about 2200 kg/m3|
|Strength properties||Strength class C80Strength class C80
Test results: compressive strength EN 1015-11
1day 36.6MPa water amount 13%
7days 72.3MPa water amount 12%
28days 84.5MPa water amount 12%