The old surface is prepared so that the new concrete will adhere then the new cement is added.
Concrete floor topping thickness.
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.
Usually steel fabric reinforcement mesh will be required in the concrete topping.
Laying of topping concrete.
As defined above these are screeds and toppings that are applied at the time when the underlying concrete floor is placed.
Floor top stg is a standard traffic grade single component shrinkage compensated self leveling floor topping and underlayment that may be pumped or poured.
The amount of camber will usually depend on the length of the plank.
The structural drawings will state a minimum thickness for the concrete topping perhaps 40mm.
Strike off the concrete topping with the vibratory screed.
Screed thickness should be approximately 25 mm but not less than 15 mm or more than 40 mm.
If no water absorption is seen then the topping concrete can be laid as done in normal process.
The concrete topping should be approximately 1 8 inch 3 mm above the bottom of the screed.
There aren t many reasons to have only a 1 inch thick concrete surface.
The topping mix that you mentioned is ok.
Based on the thickness and the requirement of the topping slab steel reinforcement is provided.
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.
The minimum thickness of a monolithic topping at any part should be 20 mm.
The concrete topping used should have a maximum slump of 75 mm.
Floor top stg is specially designed to smooth out uneven rough or minor deteriorated interior concrete floors.
For bonded and unbonded concrete topping slab strength of concrete for concrete topping slab is governed by function of the slab.
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.
It is too thin to use as a flooring just by itself.