👉Some Important Questions*part 1*

*1: what is Development Length?*

*Ans:* Development length is an extera length of steel, which transter the load from one steel bar to other.

*2: What is Hydration?*

*Ans:* Hydration is reaction b/w cement and water.

*3: What is M20 Grad Concrete?*

*Ans:* “M” Stands for Mix and No (20) is the Compressive strength of concrete in 20N/mm2 after 28 days after laboratory test. and M20 grad concrete we have to use in the RCC slab.

*4: What is Water Cement ratio?*

*Ans:* water–cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix.

*5: What is Bearing Capacity of Soil?*

*Ans:* Bearing Capacity is the capacity of soil to support the load applied to the ground.

*6: Time to removal of Fromwork for different RCC structures?*

*Ans:* For column/walls, vertical form works should be detached after 16 to 24 hours.

Soffit formwork to slab (formwork is located under the slab), the form works can be removed after 3 days. (props should be reaffixed once the removal is done).

Soffit formwork to beam, the form works can be removed after 7 days. (props should be reaffixed once the removal is done.)

Beam that spans up to 4.5 m (length), the form works can be removed after 7 days.

Beam that spans surpassing 4.5 m (length), the form works can be removed after 14 days.
For footing, the formworks can be removed after 16 to 24 hours.
For staircase, the form works can be removed after 5 days.

7, When we use pile foundation?

Pile foundation is adopted when the Soil Bearing Capacity is less than 24 KN/m3

@etconp