Concrete Floor Topping Thickness

The old surface is prepared so that the new concrete will adhere then the new cement is added.

Concrete floor topping thickness.

Usually steel fabric reinforcement mesh will be required in the concrete topping. Strike off the concrete topping with the vibratory screed. The concrete topping used should have a maximum slump of 75 mm. For bonded and unbonded concrete topping slab strength of concrete for concrete topping slab is governed by function of the slab.

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. Commonly placed topping slab is in the range of 50 100 mm. 30mpa for light duty 40 mpa for medium duty and 50 mpa for heavy duty.

There aren t many reasons to have only a 1 inch thick concrete surface. The topping mix that you mentioned is ok. It is too thin to use as a flooring just by itself. 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.

Given that the floor is interior the cracks between the existing concrete and the trenches for plumbing and electrical probably won t move. Laying of topping concrete. The amount of camber will usually depend on the length of the plank. 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. The structural drawings will state a minimum thickness for the concrete topping perhaps 40mm. Screed thickness should be approximately 25 mm but not less than 15 mm or more than 40 mm. Floor top stg is specially designed to smooth out uneven rough or minor deteriorated interior concrete floors.

Floor top stg is a standard traffic grade single component shrinkage compensated self leveling floor topping and underlayment that may be pumped or poured. 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.