Hardscape & GradingCâu 61 / 100
Compaction of subgrade soil before hardscape is measured against what standard reference?
a.The color of the soil
b.The soil's pH
c.The number of passes only
d.A percentage of maximum dry density (for example, 90 to 95 percent)
Giải thích
Compaction is specified as a percentage of a soil's maximum dry density determined by a laboratory Proctor test, commonly 90 to 95 percent for hardscape subgrade. Field testing verifies the soil reaches the required density. Adequate compaction prevents future settlement under pavement.
Luyện miễn phí toàn bộ 100 câu hỏi — không cần đăng ký.
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