10.200 -FIBERCEMENT PRODUCTS
High Reactivity Metakaolin (HRM)
Engineered Mineral Admixture for Use with Portland Cement
PowerPozz™is a white pozzolanic mineral admixture that enhances the performance of Portland cement in many types of cement-based products. It is particularly well suited for use in Fibercement.
BENDING STRENGTH of Fibercement based products are considerably higher when PowerPozz™ is used:
- A High Reactivity Metakaolin, PowerPozz™combines chemically with calcium hydroxide, creating calcium silicate and calcium aluminate hydrates.
- With a consistent particle size distribution, PowerPozz™is several times smaller than cement particles. Thus, PowerPozz™forms a more densified paste by filling voids that would otherwise be present in plain cement compositions.
DIMENSIONAL STABILITY
- High Reactivity Metakaolin has been shown to reduce drying shrinkageversus comparable silica fume enhanced composites.
- Reduced overall permeabilitywill greatly reduce the swelling and shrinkage associated with all types of exposure conditions.
IMPROVED BOND STRENGTH
The densified paste system, with enhanced internal cohesion and adhesion, will reduce the incidence of weak fiber/paste interfacial zones without increased brittleness, thus improving the strength andtoughness of the system.
EFFLORESCENCE CONTROL
PowerPozz™is a lime-hungry pozzolan. It has been shown to combine with more than its weight equivalence in calcium hydroxide, helping to prevent Primary Efflorescence during curing. Filling the spaces between cement grains will limit internal “bleeding”, thus reducing CaCO3formation and staining.
In hardened, cured products, PowerPozz™will help prevent Secondary Efflorescence caused by wet/dry cycles in two ways:
COLOR NEUTRAL
PowerPozz™is a white pozzolan. It will not darken existing compositions. In fact, in colored products, it offers the solution to problems with pozzolan color variability by providing quality-assured, lot-to-lot consistency.
SCREEN RETENTION -HATSCHEK PROCESS
PowerPozz™platelet-shaped particles will benefit in improved screen retention in Hatschek processes, providing production gains while enhancing output quality. PowerPozz™has been engineered to optimize micropacking, surface area, and reactivity without sacrificing physical handling and production efficiency.
CONSISTENCY OF SUPPLY
An engineered product, PowerPozz™is manufactured to exacting specifications. Consistent in its properties and performance, PowerPozz™delivers reliable results.
EASE OF USE
No special handling equipment required.