Dry Shake Toppings
Malin currently own two spreader machines, Topp&Screed TS-5000 (http://toppandscreed.com/) and the STS 132 Topping Spreader (www.somero.com) for mechanical application of dry shake toppings. These toppings can also be applied to hand laid slabs by using a Tremix spreader or by hand application.
The spreader machines apply the dry shake material onto concrete that has just been laid and is still in its ‘fluid state’. The parent concrete provides the water required to hydrate the cements in the dry shake material which is then power floated into the concrete providing a monolithic finish at the surface.
Applications for Dry Shake
A dry shake topping can be specified for various applications including: –
- Fibre Suppressant aid for slabs incorporating steel fibre reinforcement.
- To aid achievement of Abrasion resistance requirements such as AR special & AR1. (TR34)
- For aesthetic qualities where a range of colours can be provided.
Types of Work
A mechanised system of laying concrete floor slabs where a machine trims, levels and vibrates concrete up to 350mm deep with the correct specification concrete. Tolerances up to FM1.
High Tolerance Floor Slabs
Precision levelled slabs are often required for many types of installation. For Free Movement tolerances where very tight tolerances are required over the whole slab. This may well be for specialist equipment e.g. air cushion transport etc. are being used, we can lay slabs to FM1 (Free Movement). For racking areas the tolerance changes to Defined Movement and Malin can lay large areas of slab to DM1 (Defined Movement). With both specification Laser Screed construction methodology can be utilised.
Upper Floors and Mezzanines
These can be slabs on metal decking and pre-cast planks. These are normally laid using hand screed methodology. Alternatively, the smaller Laser screed systems, copperhead, S840 type machines can be used if access and egress can be provided. Tolerances depend upon stiffness of the supporting structure which includes structural steelwork and decking/planks.
Hand Screeded Flooring
Generally used for smaller areas of offices, small sheds etc. where the mechanised system cannot be used. Tolerances are generally FM3 or FM4
Specialist slabs situated inside an insulated panel box building. Sizes can vary from just a small unit inside a retail outlet to a whole building. The slabs are normally hand laid although the smaller Laser Screeds, Copperhead and S840 can be used if access and egress can be provided. Tolerances are dependant upon methodology used. If required very high tolerances, DM1 or similar can be achieved using the ‘long strip method’. More generally FM3 or FM4 tolerances are adopted using the hand lay systems.
Generally specified for outside slabs and roadways for traffic into and out of warehouses etc. The most common finish is a brush finish to provide a textured running surface for the vehicles using the hardstandings and roadways. Various techniques can be adopted using both mechanical Laser screed type systems and hand lay systems. These slabs are normally laid to falls into a designed surface water drainage system.
Ground Bearing Slabs
These slabs rely entirely on full support from the sub strata. The reinforcement detailing, and design is specific for controlling the drying shrinkage of the concrete.
Suspended Pile Supported Slabs
These slabs have reinforcement designed to distribute loadings into the concrete capable of spanning between a designed pile system. Reinforcement includes designed rebar, special designed mesh sheets and steel fibres etc.
Hydraulically Efficient Slabs to Falls
Mainly used in wet areas where the manufacturing processes include a washout water being drained away. Bottling plants, fish and meat processing plants all commonly use this system.
Multi Story Car Parks
Commonly laid to falls and having a brush type finish to provide grip for vehicles. Some carparks have other finishes applied to the finished concrete.
Waste Treatment Plants
Various configurations exist for waste treatment plants. Generally slabs are laid to falls but some areas are laid ‘flat’. Concrete has to be designed specifically for the type of waste being treated which can be very aggressive to concrete.
Various configurations exist for recycling centres. Generally slabs are laid to falls but some areas are laid ‘flat’. Concrete must be designed specifically for the type of waste being treated which can be very aggressive to concrete and extremes of temperature, up to 70º Celsius can exist between areas of concrete a small distance away. In other centres very aggressive machinery e.g. heavy face loading shovels, can be used and the concrete has to have a very ‘tough’ abrasion resistance. Joints need to be carefully considered.
Main Site Plant Resources
- 2 No S-22E Laser Screeds, these are the latest machines out of the world renowned Somero stable. Both machines have been upgraded to incorporate the latest roller plow head technology…….
- 2 No SXP-D Laser Screeds
- 2 No SXP Laser Screeds
- 2 No S-240 Laser Screeds
- 1 No S840 Laser Screed
- 1 No Copperhead X3
- 1 No Power Rake 2
- 1 No Miniscreed
- Numerous power float options to cater for all types and configurations of concrete floors.