Removing the laitance at the top of placements in a small dam is consuming an excessive amount of time. We sandblast the surface, but a considerable amount of concrete gets abraded off. Then we have a layer of both sand and concrete particles that have to be flushed away. What measures could be taken to speed up the operation or replace it with a more efficient method?
This seems to be a natural application for highpressure waterblasting equipment. It removes laitance without so much abrasion and flushes it away at the same time.