Why should I use banahMETA in my concrete products?
Simply put it is about making concrete better – therefore it adds value to concrete. Below is a list of reasons why, however they won’t all be applicable for every application! It depends upon your (or your clients) requirements;
- Chloride and Sulfate resistance
- Early strength when compared to GGBS
- Workability and finishing enhancement
- Potential for efflorescence
- Effects of alkali-silica reaction
- Carbon, sulfur and heavy metals
What is banahMETA?
banahMETA is an ingredient for concrete. It is a powder, which when included in concrete can greatly improve it’s properties. banahMETA is made from a natural clay source, which is then milled down to size and then thermally heat treated to activate some properties in it. It has metakaolin in it, which reacts with free lime (portlandite), which is often regarded as the weak link in concrete systems. This reaction, binds up the portlandite and makes the concrete denser and stronger as result.
Is it covered by standards?
Yes – today banahMETA complies to BS8500 as a type I filler. There is more info below on specific standards and developments:
EN 206 - Variation between member states e.g:
- NF EN 206 permits metakaolin as Type II addition provided the material conforms to NF P18-513:2012 Additions pour béton hydraulique – Métakaolin – Spécifications et critères de conformité.
- BS EN 206 excludes metakaolin as a Type II addition.
BS 8500 - UK national annex to EN 206
- Currently being revised to permit the use of both 'P' and 'Q' category pozzolans as Type II additions.
- Pozzolan must conform to a new combined product standard.
BS 8615 - Specification for pozzolanic materials for use with portland cement
- Agreed draft out for public comment to be granted by November 2018