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Ronafix screeds are site batched screeding mortars and fine concretes. The mix design for each is Ronafix admixture, cement, medium grade sharp sand, aggregate as determined by the mix design, plus water. The components are measured by weight or by volume on site and mixed to form the screed.
Mortars containing Ronafix are used for a wide range of applications where thin high strength high performance mortars are required. Typical minimum application depth is 6mm.
They are used with a primer of Ronafix and cement, which achieves monolithic adhesion to correctly prepared concrete or screeds. Ronafix screeds are used to lay new screeds and toppings as thin as 6mm bonded or 35mm unbonded or floating. The cured mortar bonds securely to suitably prepared surfaces and is water-resistant.
There are 2 mix designs when using Ronafix as a concrete repair mortar. Ronafix Mix Design A is used for concrete repairs where there is no exposed steel reinforcement and Ronafix Mix Design D is used where any reinforcement is exposed.
See the data sheet for the full mix requirements.
Preparation
The substrate on which the Ronafix screeds are being placed must be structurally sound and stable and suitable to receive a high strength topping. Surfaces should ideally be vacuum shot blasted or similar to expose the aggregate and provide a mechanical key. All grease and oil must be removed. Dust, debris and loose material must be removed by vacuuming. Any defect or weakness in the substrate may result in failure of the topping placed in contact with it. The recommendations given in BS8204-3: 2004 Part 7 should be followed, to assess the suitability of the substrate and maximise the performance of the topping.
Note the minimum and maximum application depths for each mix design. Surfaces must be cut back to allow the minimum depth of mortar to be placed without feather edging.
Damping
The prepared surfaces must be thoroughly damped with clean water. Very porous surfaces may require soaking for up to 24 hours. All surplus water must be removed before the primer is applied.
Priming
Brush apply a coat of Ronafix / cement primer mixed 1:1 by volume to the damp surface immediately before applying the screed, at the rate of 3-4m2 approximately per litre of Ronafix. Mix the primer thoroughly and apply evenly over the surfaces ensuring total and uniform coverage, taking care to avoid ponding. Only prime an area of floor which can be covered by the mortar within the working time of the primer.
Note that the primer must not be allowed to dry. If it dries it must be thoroughly scratched and reapplied.
For full mixing, placing and curing details, see Product Data Sheet for full guidance.
Components: | Single Pack |
Type: | Admixture for Screeds |
Application Method: | Dependent on System |
Shelf Life: | Ronafix should be stored unopened between 5°C and 25°C in dry warehouse conditions and out of direct sunlight. In these conditions shelf life is approximately 6 months. |
Packaging: | Available in 5 and 25 Litres |