Hardscape & Grading第 51 / 100 题
Aggregate base under hardscape is best compacted in what manner?
a.In one thick lift with no compaction
b.Only after the pavers are placed
c.In thin lifts (layers), each compacted before the next
d.By soaking it with water only
解析
Base material should be placed and compacted in thin lifts, commonly around 3 to 4 inches, so the compactor can achieve full density throughout. Compacting one thick lift leaves the lower portion loose, causing later settlement. Layered compaction produces a stable, uniform base.
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