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2. Testing of concrete cubes is performed and the following test results are obtained. Age Concrete cube strength (MPa) 1 day 3.8 7 days 19

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2. Testing of concrete cubes is performed and the following test results are obtained. Age Concrete cube strength (MPa) 1 day 3.8 7 days 19 28 days 26.8 2 months 31.5 3 months 33.4 6 months 36.0 1 year 36.2 Plot a graph of concrete strength (y-axis) versus time. Comment on the graph regarding the strength growth of concrete with respect to time. (Please find relevant literature yourself)

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