C5: ALTERNATIVES TO CONVENTIONAL CONCRETE

Reinforced cement concrete is extensively used in the construction industry ranging from small structural elements such as beams and columns to massive structures like dams and bridges.

What is reinforced cement concrete?

• A type of natural stone used in construction
• A form of non ferrous steel composite

• A composite material made of concrete and steel reinforcement
• A type of wooden construction material

The bond between steel and the surrounding concrete ensures strain compatibility.

Explain other benefits of RCC (choose 2 answers).

• potential of resisting significant tensile stress

• To make the structure more prone to corrosion
• To decrease the load-bearing capacity
• To impart ductility to the composite material

RCC is a composite material made up of cement concrete and reinforcement in which both are resist to varies stress, such as .................. (choose 3 answer)

• compression

• bending

• shear

• tension

• torsional

RCC is a type of concrete that uses reinforcing fibers to improve the strength and stability of the concrete. Explain how the fibers are applied in RCC

• Fibers is place on the first layer concrete before the final concrete is pour upon the first layer

• Big size fibers increase the gravity of the concrete. Thus resulting to heavier concrete structural.

• Varies size of fibers are placed only at the column to tie the vertical structure so that loads are distributed to footings

• Fibers are woven in to the concrete, and they help to distribute pressure and stress throughout the material

Cement concrete are commonly used for structure in normal environmental condition.

However, alternative to the conventional concrete is highly demand.

Choose 3 correct reason to comply the alternative concrete application.

• Reducing carbon emissions

• better mechanical properties

• increase durability

• light weight

Chose the correct definition of pre-stressed concrete.

• no-slump concrete that is compacted with heavy equipment

• a composite material, having the potential of resisting significant tensile stresses.

• a highly flow-able concrete that can spread into place or fill in the form-work,

• concrete with stresses of suitable magnitude that distribute to counteract in a desired degree

Choose 3 types of reinforcement bar used in pre-stress concrete.

• 
• 
• 
• 

The pre-stress concrete are basically form to resist stresses from external loads.

Gives two (2) result from the application of pre-stress concrete.

• allow for flexible bending

• enable for thin concrete floor

• advantage for tensile stress

• reduce shrinkage cracks

What is stage no.3 in the pre-tensioning process?

• tension the cables

• cast and cure concrete with duct

• tension wire cut to force concrete in compression

• anchor off the cables

what is stage no.3 of this post-tensioning process?

• put out the cable

• anchor off cable & grout up

• tighten cable and pour concrete

• release cables and transport to site