Question

What is the time and revolutions of the drum when truck concrete mixers are used, the time between batching and complete discharge after the water has been added to the cement and aggregates?

1 - 1 ½ hours, 200 times
2 - 1 ½ hours, 300 times
3 - 1 ½ hours, 400 times
4 - 1 ½ hours, 500 times

Answer 1

Typically, a truck concrete mixer drum should operate for 1 ½ hours and make around 300 revolutions from batching to complete discharge, ensuring uniformity in the concrete mix.

Step-by-step explanation:

The question pertains to the operation of truck concrete mixers and specifically asks about the time and number of revolutions the drum makes from batching to complete discharge after water is added to the cement and aggregates. While the exact answer to the question provided is not fully evident within the details given, the typical guideline is that the mixing should continue for about 1 ½ hours and the drum should make approximately 300 revolutions to ensure the concrete mix reaches satisfactory uniformity. However, users should verify this with local regulations or manufacturer guidelines as these numbers can vary based on specific conditions and mixer design.