Cementitious grout is a free flowing, cementitious mortar or paste with special mechanical properties that can be poured or injected to fill gaps, crevices or voids. Cementitious grout is made up of a mixture of water, cement, selected fillers, aggregates and special additives.
What Makes SikaGrout®-295 ZA Unique?
SikaGrout®-295 ZA was originally formulated for the Gouda Windfarm project back in 2016. This cementitious grout that was developed to fill the joints, transfer the dynamic load from the wind turbine to the concrete foundation, and protect the reinforcement steel and bolts against corrosion.
"SikaGrout®-295 ZA is unique – there is no other product in South Africa quite like it! This ultra-high strength grout has already made it's mark in the Global Wind Industry towards building a more sustainable future. It was a rewarding product development as Wind Energy is a long term and great electricity generating solution, which the world can benefit from. " Nondu Phetha, Chief Chemist - Sika South Africa
Product Development of SikaGrout®-295 ZA
Interesting Facts About Gouda Windfarm
Prevent the Void; Strengthen the Load
Any product containing cement will ultimately shrink and create gaps; therefore a shrinkage compensated grout is essential. SikaGrout®-295 ZA has a very low shrinkage behaviour combined with controlled expansion. For concrete towers, in the Wind Energy business, this will ensure an effective bearing area under the wind turbine bases. It is important to have an effective bearing area to have a proper load transfer, and to prevent voids and gaps from forming.
- under bearing plates to level and transfer loads from the element to the foundation
- between precast concrete segments
- as anchors in bases, concrete post and precast construction columns
- in bridges to level and support the bridge bearing
- in new construction and remedial works in residential building
Easy Usage
SikaGrout®-295 ZA is easy to use as it only requires to be mixed with water. The product can be easily poured or pumped. It is highly recommended that the concrete substrate should be pre-soaked in clean water for a minimum of two hours beforehand. Failure to do so is likely to result in the concrete extracting from the grout, affecting its cure, leaving a potential for cracking and reduced adhesion.
Application Instructions can be found on the Product Data Sheet.
Fatique Test Certified
SikaGrout®-295 ZA – once it's fully cured – can achieve compressive strengths similar to C90 concrete and can be pumped above 100m high. This product has been fatigue tested and certified internationally by Applus*.
*Applus is a worldwide leader in the testing, inspection and certification sector.
Expert Advice
Specifying the correct quantity and strength of grout is a basic requirement for a quality application, but it’s a simple trick that can sometimes be missed. Sika’s technical team is available to eliminate the risk of such oversights. Our staff have the necessary expertise and product information to ensure correct grout quantity and type for a particular project and are also available for site visits to offer application guidance.
