Question

ABC Construct Bina Sdn Bhd. is awarded a contract to construct 100 single storey houses. The construction method is using conventional method or in-situ construction. Concrete is the main material used in that construction project.

a) Demonstrate the roles of parties involved in ensuring good quality of work is delivered during the construction project.

b) Explain the assessment involved in ensuring the quality of the reinforced concrete structural elements.

c) Discuss the possible problems related to poor quality control that may arise at construction site.

Answer 1

a)

• Client:

• The client should clearly mention the all required specifications at the time agreement itself.
• The specifications of material for each work should be given to the contractor for every work.
• And frequent inspection of the work , and checking the specifications is the most necessary in the conventional construction. As itself includes the highest cost to complete the project.

         Contractor:

• The contractor should clearly read all the specifications and maintain the Work break down structure as per the give schedule.
• Naturally contractor will give the work to subcontractor so he will scrutinize the work at all stages.
• If one mistake done at the ending stage which oversees will become the biggest mistake of the project.
• And the material is the most important in the construction industry.
• The contractor should test the required material properties at the every time the batch arrives. And third party testing will also help the most.
• And making the perfect schedule he should complete the work within the timeline.

2. When it comes to the concrete , because it’s a in-situ project the batching plant will be at the site itself.

• Reinforced concrete structures are subjected to a series of actions throughout their lifespan which can be the cause of deterioration.
• In proper strength of the concrete will lead to the failure of the structure. So the concrete will be checked for workability and strength at the time use.
• And improper pumping and mixing will lead to the segregation of the aggregates from the mix.
• And excess final setting time of concrete will lead to the cracks.
• Improper placing of the formwork leads to the concrete bulging.
• If the reinforced bars in the concrete are affected by corrosion then the concrete life will be deteriorated.
• So , to avoid all this the basic tests for the concrete should be done. And care should be taken while placing the concrete.

3. The main problems arrive at site because of pure quality control mainly related to the materials only.

• Because of the poor quality of cement the concrete did not have enough strength and issues related to setting time also.
• Which leads to the bulging of the concrete , deterioration and cracking of the concrete.
• Steel is the main structural element in the construction. Which should be checked properly placed properly to avoid collapse and corrosion.
• Because of the corrosion both concrete and steel will affected which leads to the structure collapse.
• If we maintain the quality check properly this will not happen.