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What is the standard deviation which IA used in the mix design of concrete?
How does the type and quality of the aggregates used in concrete mix design affect the standard deviation and strength of the concrete?
The type and quality of the aggregates used in concrete mix design can have a significant impact on the strength and quality of the cured concrete. For example, the use of high-quality, well-graded aggregates with good particle shape can result in a stronger and more durable concrete with a lower standard deviation, while poorly graded or contaminated aggregates can lead to reduced strength and increased variability in strength. In addition, factors such as the aggregate size and surface texture can also impact the workability and ultimate strength of the concrete.