Abstract
The article discusses well-known and perspective constructive and technological systems for the installation of monolithic and precast-monolithic floor slabs of civil and industrial buildings. It shows examples and expediency of using all kinds of inserts made of plastic and other light materials and products for replacing a part of heavy monolithic reinforced concrete. An original resource-saving method for the installation of precast-monolithic floor slabs with a simultaneous increase in the degree of their construction readiness is proposed. This effect is achieved by reducing their own weight and the use of permanent formwork. Reduction in own weight of the precast-monolithic floor slab is ensured by the use of volumetric lightweight trapezoidal or rectangular inserts, preferably made of expanded polystyrene, during its installation. The use of permanent formwork will eliminate the need for the subsequent performance of labor-intensive finishing and insulation works. To confirm the effectiveness of using the proposed method of precast-monolithic floor slab installation, the operation of two floor slabs was modeled in the LIRA SAPR computing complex - the proposed reinforced concrete innovative slab and a solid reinforced concrete slab. Having analyzed the calculated forces, deformations and the corresponding consumption of reinforcement and concrete, comparative indicators were obtained for the proposed innovative slab and for a typical solid floor slab. As a result, significant savings in material and cost have been proven.
Highlights
In modern monolithic construction, the priority task is to reduce the material consumption of the structure by applying technological methods for the rational use of materials, as well as reducing labor costs for the entire construction period
It is required to strengthen all the supporting elements of the building frame. This need leads to an increase in the consumption of materials, labor costs, and, as a result, an increase in financial costs for construction
The proposed design will be more technologically advanced in production compared to the traditional solid floor slab
Summary
The priority task is to reduce the material consumption of the structure by applying technological methods for the rational use of materials, as well as reducing labor costs for the entire construction period. The installation of monolithic reinforced concrete floor slabs is an important and necessary stage in the construction life cycle. The disadvantage of such an floor slab is the high own weight of the structure. It is required to strengthen all the supporting elements of the building frame. This need leads to an increase in the consumption of materials, labor costs, and, as a result, an increase in financial costs for construction.
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