铺装砖下面铺多厚的砂？

2.5 厘米粗砂，刮平且铺装前不得压实。真正的受力层是下面压实的碎石基层，砂只负责让砖坐稳。

一立方码等于多少袋 25 公斤装？

约 54 袋，因为一立方码砂约重 2,700 磅。超过十袋左右，若能接受送货，散装更划算。

铺装砖应该用什么砂？

找平层用符合 ASTM C33 的粗混凝土砂，缝隙用聚合物砂。游戏砂和砌筑砂太细，会被冲走并让砖块松动。

可以用游戏砂做铺装基层吗？

不可以。游戏砂经过水洗且非常细，保水且受力后会移动。它适合沙坑，却是任何行走或行车面下的错误选择。

一个沙坑需要多少砂？

1.2 × 1.2 米的沙坑填到 20 厘米约需 10.7 立方英尺，即 22 袋 25 公斤装。多数家庭填到 15 厘米，约 16 袋。

砂子计算器

按所购砂子类型的密度，估算铺装找平层、沙坑、砂浆或回填所需砂子的吨数、立方码数和袋数。

公式与数据最后核对于 2026年8月6日 — Cosyslabs

输入

砂子类型

长度(ft)

宽度(ft)

厚度(in)

损耗百分比

每吨单价（选填）($)

Result

Sand needed

0.92 tons

Volume

0.65 yd³

50-lb bags: 37
Weight: 1838 lb
Density used: 105 lb/ft³
Waste: 5%

Waste default: 5% — 5% 用于刮平损耗以及留在车厢或袋中的少量材料。

Diagram

Estimates only. Verify with a licensed contractor or supplier before purchasing. Rough Estimator! is not responsible for shortages, overages, or material variances. See our methodology for formulas and sources.

公式

体积 ft³ = 长 × 宽 × (厚 in ÷ 12) × (1 + 损耗)   ·   吨数 = ft³ × 密度 ÷ 2000

参考资料

Measure what the tool asks for
This calculator works from 长度 in ft, 宽度 in ft and 厚度 in in. Measure the finished area you are covering, not the material — an estimate is only as good as the dimensions you feed it.
What it does with those numbers
体积 ft³ = 长 × 宽 × (厚 in ÷ 12) × (1 + 损耗) · 吨数 = ft³ × 密度 ÷ 2000 Every figure on the page comes out of that one expression, so you can check it by hand.
Why it adds 5% waste
5% 用于刮平损耗以及留在车厢或袋中的少量材料。
Choosing a 砂子类型
提示：铺装找平层要用符合 ASTM C33 的粗混凝土砂，而不是游戏砂——细砂会持续迁移，导致砖面下沉不平。
Where the numbers come from
The constants are taken from ASTM C33 — Standard Specification for Concrete Aggregates and Interlocking Concrete Pavement Institute — Bedding sand guidance, linked in full below. If a figure here disagrees with your supplier's spec sheet, use the spec sheet — it describes the product you are buying.
What this will not tell you
This is a material takeoff, not a bid. It does not price labour, permits, delivery, equipment hire or site preparation, and it assumes a straightforward layout. Complex cuts, difficult access and awkward shapes all cost more than the geometry suggests.

Related tools & materials

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Don't forget

压实碎石基层
聚合物填缝砂
土工布
边缘约束
刮平导轨

Also useful

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常见问题

把长、宽、厚（英尺）相乘，乘以约 100 lb/ft³，再除以 2,000。6 × 3 米、厚 2.5 厘米约为 16.7 立方英尺，即 0.85 吨。

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Cite this page

Cosyslabs. (2026). 砂子计算器. Rough Estimator!. https://roughestimator.com/zh/sand-calculator

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