The minimum clear distance between parallel bars is related to the largest aggregate by which factor?

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Multiple Choice

The minimum clear distance between parallel bars is related to the largest aggregate by which factor?

Explanation:
The spacing between parallel bars is set to accommodate the largest aggregate in the concrete. The minimum clear distance should be about 1.33 times the size of the largest aggregate, so the concrete paste can flow around the bars and fully surround the reinforcement during placement and vibration. This helps prevent voids and honeycombing and ensures proper bonding to the bars. For example, if the largest aggregate is 20 mm, the minimum spacing should be around 26–27 mm. A spacing of 1.0x would be tight and risk poor consolidation, while 2.0x or 3.0x is more than necessary for this purpose.

The spacing between parallel bars is set to accommodate the largest aggregate in the concrete. The minimum clear distance should be about 1.33 times the size of the largest aggregate, so the concrete paste can flow around the bars and fully surround the reinforcement during placement and vibration. This helps prevent voids and honeycombing and ensures proper bonding to the bars. For example, if the largest aggregate is 20 mm, the minimum spacing should be around 26–27 mm. A spacing of 1.0x would be tight and risk poor consolidation, while 2.0x or 3.0x is more than necessary for this purpose.

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