Gannon Dunkerley & Co. Civil Site Engineer Interview Questions, Process, and Tips

A structure is a system or arrangement of parts that are interconnected and function together to support loads and resist forces.

• Structures can be man-made or natural

• They can be made of various materials such as steel, concrete, wood, etc.

• Examples include buildings, bridges, dams, towers, etc.

Types of concrete include ready-mix concrete, precast concrete, reinforced concrete, and shotcrete.

• Ready-mix concrete is produced in a batching plant and delivered to the construction site in a plastic condition.

• Precast concrete is cast in a reusable mold or form and cured in a controlled environment before being transported to the construction site.

• Reinforced concrete contains steel reinforcement bars to increase its ...read more

Grades of concrete refer to the strength of the concrete mix design.

• Grades of concrete are denoted by M10, M15, M20, etc. where 'M' stands for mix and the number denotes the compressive strength in MPa.

• Higher grade concrete has higher compressive strength and is used for structural purposes.

• Common grades include M25, M30, M35, and M40 for heavy-duty structures.

• The mix proportions vary for different grades of concrete t

M20 is a grade of concrete used in construction. M stands for mix and 20 represents the compressive strength of the concrete in megapascals (MPa).

• M stands for mix, indicating the type of concrete mix used

• 20 represents the compressive strength of the concrete in MPa

• M20 is commonly used for general construction purposes

• Higher grades like M25, M30, etc., have higher compressive strengths