Vetonit Dry Concrete 45

Substrates must be sound, clean, and free from dust, laitance, oil, grease, curing compounds, and any other bond-inhibiting contaminants. Smooth or non-porous surfaces should be mechanically roughened by sanding or light chipping to provide an adequate mechanical key. In confined or bound areas, suitable formwork or framing must be installed prior to application. Absorbent substrates should be pre-wetted with clean water to achieve a saturated surface dry (SSD) condition, ensuring no standing water remains before application.

Use proper mechanical mixing apparatuses (drum or barrel mixer) and ensure that the size is suitable for the planned mix size. 

Add a clean water to the mixer and turn it on, start with the minimum recommended for each class, then add the mortar bags and mix for 2 minutes (depends on the used mixer), add the aggregates as recommended for each class, keep mixing till achieving a workable concrete mix (slump 50 – 80 mm). water can be added up to the maximum recommended. 

Hand mixing with shovel and/or mortar hoe, with the following the same sequence recommended with mechanical mixer.

Pour the mix in the prepared place or in buckets and transfer them to the working area, use a shovel or concrete trowel (Darby) to spread the concrete mix and ensure a full filling and compaction, rod or bullfloat it to desired surface shape. 

Follow the joint types and location as per concrete pours specifications. 

Finishing can be done following the standard concrete finishing techniques, by hand troweling or power troweling. 

Keep the applied area away from direct sunlight and wind, and avoid application under low and high temperature (standard application temperature +5 to +35 C°)

Curing is critical for concrete mixes, and it is the strength motivator, so it is vital to cure the pour as per the standard concrete curing methods.

Curing should start as soon as the applied concrete set and accept water without any risk of washing out! And this shall continue for 7 days. 

Best practice is to use a curing burlap (Hessian) and ensure its dampness and moisture for the curing period. Also covering the pour with a plastic sheet, especially on the first day will decrease the risk of fast drying and evaporation. This method is very effective, but it might cause discoloration for the surface, and this does not affect the performance and the goal of the pour. 

Also, a cringe compound can be used, but it should be applied carefully such that at the time the surface hardened to be sprayed or brushed directly.

Clean tools with water before the material hardens. After hardening, remove mechanically.