Concrete Floor Topping Thickness

Usually steel fabric reinforcement mesh will be required in the concrete topping.

Concrete floor topping thickness.

Commonly placed topping slab is in the range of 50 100 mm. Given that the floor is interior the cracks between the existing concrete and the trenches for plumbing and electrical probably won t move. However most precast concrete planks will have a built in upwards camber. Strike off the concrete topping with the vibratory screed.

The old surface is prepared so that the new concrete will adhere then the new cement is added. As defined above these are screeds and toppings that are applied at the time when the underlying concrete floor is placed. However if you need to resurface damaged concrete a 1 inch layer is a good amount. It is too thin to use as a flooring just by itself.

Based on the thickness and the requirement of the topping slab steel reinforcement is provided. The concrete topping should be approximately 1 8 inch 3 mm above the bottom of the screed. The topping mix that you mentioned is ok. There aren t many reasons to have only a 1 inch thick concrete surface.

The amount of camber will usually depend on the length of the plank. Floor top stg is specially designed to smooth out uneven rough or minor deteriorated interior concrete floors. Screed thickness should be approximately 25 mm but not less than 15 mm or more than 40 mm. For bonded and unbonded concrete topping slab strength of concrete for concrete topping slab is governed by function of the slab.

The minimum thickness of a monolithic topping at any part should be 20 mm. Floor top stg is a standard traffic grade single component shrinkage compensated self leveling floor topping and underlayment that may be pumped or poured. 30mpa for light duty 40 mpa for medium duty and 50 mpa for heavy duty. When a topping slab is used over precast members aci 117 90 standard specifications for tolerances for concrete construction and materials allows up to a 3 4 inch offset of top surfaces of adjacent elements in an erected position.

Laying of topping concrete. The day before you place concrete wet down the surface and keep it wet until you place concrete but don t have any standing water on the slab during placement.