TECHNICAL AND ECONOMIC EFFICIENCY OF MONOLITHIC REINFORCED CONCRETE SLABS WITH INSERTS
DOI:
https://doi.org/10.31713/budres.v0i36.260Abstract
In recent years there is an obvious tendency to build residential, civil and other buildings with a monolithic reinforced concrete frame.
The most material cost element of these frames is monolithic reinforced concrete floors, which account from 60 to 70% of the total volume of reinforced concrete of the building. The slab thickness of such floor is 18 ... 20 cm, so the minimum weight of the floors is significant – 4-5 kN/m2, which exceeds approximately twice the running load on the floor.
The inserts are used at the floors placement in order to reduce their own weight: plastic are used abroad, polystyrene ones are mainly used in Ukraine.
The overview of technical and economic indicators of slabs with effective inserts of various forms and different materials is provided in the article, technical and economic indicators from own experience of designing such slabs is presented.
The economic efficiency of flat reinforced concrete slabs with polystyrene inserts is achieved due to a significant reduction of concrete consumption - from 25 to 47%. Reducing the own weight of the slabs gives accordingly the economy of working armature -> 7 ... 12%.
Reducing the cost of concrete and armature completely compensates for the additional costs of inserts and the cost of work on their arrangement.
