Generelt
Product description
weber EXM OS is a high strength grout. The material is supplied as pre-mixed dry powder and should be mixed only with water to obtain a ready-to-use, lightly flowing, expanding, frost-resistant, underpinning grout. The included cement is low alkaline and makes the product sulfate durable. weber EXM OS displays very good pumpability properties.
Dokumentasjon
Spesifikasjoner
Product specification
PROPERTIES | |
Application temperature | >+2oC |
Yield | Approx. 12 litres/25 kg bag Approx. 480 litres/1000 kg bag |
Water demand | 11-12% 110-120 litres/1000 kg bag 2,75-3 litres/25 kg bag |
Compressive strength | Prism 40x40x160 mm Cylinder Ø150/300 mm Cubes 75 mm |
Flexural strength | Prism 40x40x160 mm 1 day >5 MPa 7 days >9 MPa 28 days >11 MPa 90 days >12 MPa |
Modulus of Elasticity | Approx. 32 GPa |
Binder | Portland cement |
Aggregate | Sand 0-4 mm |
Expansion | 0,5-1% |
Initial setting time | Approx. 5 hours |
Waterproof | Yes SS 13 72 14 |
Consistency | Light flowing |
Frost resistance | Yes SS 13 72 44 (salt environment) |
Scaling at freezing | Very good |
Field of application
weber EXM OS is especially suitable where total filling and extra high strength is required. weber EXM OS is designed for use as structural grouted connections in wind turbine foundations both for offshore and onshore constructions as well as grouting of gravity base structures on offshore platforms. weber EXM OS can also be used in underpinning, embedding and encasing of concrete- and steel structures, bridge bearings, cisterns etc. The material is also well suited for other types of casting work where good waterproofness and high strength are required.
Storage
When stored in unopened and intact packaging on plastic covered pallet, under dry conditions, shelf-life is min. 12 months from date of manufacture.
Utførelse
Pre-treatment of substrate
The casting site should be cleaned properly. Impurities and contaminants should be removed mechanically, e.g. by sand blasting. Raw, broken-up surfaces for casting against an existing structure provide best adhesion. The casting site should always be moistened with water to avoid the added water being absorbed out of the casting grout.
Mixing
weber EXM OS should be mixed by adding 110-120 litres of water per 1000 kg bag (2,75-3 litres per 25 kg bag). The material and water should be mixed using a paddle- or contraflow mixer, high-speed mixer or powerful drill mixer fitted with a beater for minimum 3 minutes until a homogenous, lump-free and lightly flowing consistency is achieved.
Application
weber EXM OS should ideally be applied using a suitable mortar or concrete pump. Adjust the consistency of the mix to suit the casting work to be undertaken. When underpinning, check that no air pockets occur by working away from one side. Only light vibration may be permitted. weber EXM OS should be applied within 45 minutes.
The newly casted grout should be protected from too rapid drying out.
After-treatement
The finished casting should be protected against too rapid drying out. Exposed surfaces (stripped early) should be cured with water during the first couple of days. When watering is finished or when the covering is removed (permanent formwork), a curing membrane could be applied to achieve a best result.
NB! If risk of frost, do not after cure with water.
Please observe
At temperatures below +5oC, adhesion strength develoment will cease to increase. Care must also be taken when casting against cold concrete surfaces. The temperature of the grout mix should ideally be between +15oC and +20oC. Protect finished castings against rapid cool-down. The grout must not be exposed to frost until adhesion strength of 5 MPa is obtained, normally after 1-3 days.
Practical advice
weber EXM OS attains a light flowing (fluid) consistency suitable for pumping. Tools and machinery should be cleaned for fresh material using water. Hardened material should be removed mechanically.
Sikkerhet/miljø
Disclaimer
Since there are different conditions and requirements that apply in any case, Saint-Gobain Byggevarer AS cannot be liable for other than the information provided in this product datasheet. Examples of information and conditions beyond Saint-Gobain Byggevarer AS’s responsibility (if specially pointed out or not), involves storage, construction, preparation, how the product works together with other products, workmanship and locale conditions. The information provided in this product data sheet is based on our current knowledge and experience about the product. All of the above information must be considered as guidelines. It is the user’s responsibility to ensure that the product is suitable for the intended use, and also to perform acceptance check and self-inspection control. The user is responsible if the product is used for purposes other than recommended or for improper installation.
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