Cement (Leaving Cert Construction Studies): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the chemical reaction called when cement is mixed with water?
What is the chemical reaction called when cement is mixed with water?
Hydration
What temperature must be reached in the kiln to properly form clinker?
What temperature must be reached in the kiln to properly form clinker?
Approximately 1,450°C
What size defines the boundary between coarse and fine aggregates?
What size defines the boundary between coarse and fine aggregates?
5mm diameter
What is the standard concrete mix ratio of cement:sand:gravel?
What is the standard concrete mix ratio of cement:sand:gravel?
What problem occurs when concrete has too little Portland cement?
What problem occurs when concrete has too little Portland cement?
Bleeding (excess water rises)
How many times must each layer be rodded during the slump test?
How many times must each layer be rodded during the slump test?
25 times
What slump measurement indicates low workability concrete?
What slump measurement indicates low workability concrete?
0-50mm slump
How much can inadequate curing reduce concrete's final strength?
How much can inadequate curing reduce concrete's final strength?
Up to 50%
Why is steel used to reinforce concrete?
Why is steel used to reinforce concrete?
Steel is stronger in tension
What restriction applies to hollow blocks used in dwellings?
What restriction applies to hollow blocks used in dwellings?
Must be south-facing, cannot bear loads