The Importance of Fill on Concrete Roof Slabs in Reinforced Concrete Structures

What is the primary purpose of fill on a concrete roof slab in a reinforced concrete structure?

1) reduce sound transmission

2) facilitate drainage

3) provide a smooth base for insulation

4) protect the concrete slab

Answer:

The primary purpose of fill on a concrete roof slab is to facilitate drainage by creating a slope to prevent water accumulation, which can lead to leakage or structural damage.

Option 2 is correct

The purpose of the fill that is placed on a concrete roof slab in a reinforced concrete structure serves several functions, depending on the requirements of the project and the design specifications. However, the options provided seem to point towards different aspects of construction. Let's address each option:

Reduce sound transmission - Fill material can indeed help to insulate a building against sound, but this is not typically the primary purpose of rooftop fill.

Facilitate drainage - One of the main purposes of fill on a concrete roof slab is to create a slope for effective drainage. This prevents water from pooling on the flat surface, which could lead to leakage or structural damage over time.

Provide a smooth base for insulation - While the fill can help to even out the surface, this is more of a secondary benefit rather than a primary purpose.

Protect the concrete slab - Fill does provide protection for the roof slab from weather elements and temperature fluctuations, but again, this is often a secondary benefit.

Of these options, facilitating drainage is the most directly relevant purpose of the fill on a concrete roof slab in a reinforced concrete structure.