Start this question on a NEW page - NSC Civil Technology Construction - Question 5 - 2022 - Paper 1
Question 5
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5.1 Name the first step you will follow when plastering a wall.
5.2 Describe the main function of water when mixing plaster.
5.... show full transcript
Worked Solution & Example Answer:Start this question on a NEW page - NSC Civil Technology Construction - Question 5 - 2022 - Paper 1
Step 1
5.1 Name the first step you will follow when plastering a wall.
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Answer
The first step in plastering a wall is to wet the wall. This prepares the surface and ensures better adhesion of the plaster.
Step 2
5.2 Describe the main function of water when mixing plaster.
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The primary function of water in mixing plaster is to make the mixture workable. It allows for better texture and application, ensuring that the plaster can be easily spread and adhered to the wall.
Step 3
5.3 Name the mixing ratio of cement and sand that is used in plaster for a wavy surface.
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The mixing ratio of cement to sand used in plaster for a wavy surface is 1:3.
Step 4
5.4 For which type of plaster finish is the Tyrolean machine used?
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The Tyrolean machine is used for a splatter dash finish. This type of finish provides a textured look on the walls.
Step 5
5.5 Name TWO types of screed.
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Two types of screed are:
Dry screed
Monolithic screed
Step 6
5.6 Name the admixture you will add to reduce the water/cement ratio.
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The admixture used to reduce the water/cement ratio is a water-reducing agent.
Step 7
5.7.1 Explain the purpose of the cavity.
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The cavity serves multiple purposes:
It ensures that no water will penetrate the inner wall.
It provides insulation against heat, sound, and cold.
Step 8
5.7.2 Use a freehand drawing to differentiate between a nylon wall tie and a twisted pattern wall tie.
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A nylon wall tie typically appears as a single, straight piece, while a twisted pattern wall tie has a more complex, twisted design. (Refer to appropriate diagrams for illustration.)
Step 9
5.8 What material is used for grouting between paving bricks?
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The material used for grouting between paving bricks is typically a plaster sand or river sand mixed with cement.
Step 10
5.9 Describe the reason for the construction failure in FIGURE 5.9 below.
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The construction failure is mainly due to poorly constructed edge restraint, which failed to support the paving adequately, leading to movement and misalignment.
