A cubic meter of water is about 1.5 ~ 1.7 tons (25 crushed stone, 60 stone powder ash (two kinds of ash), 0/5 stone, 3% cement). The proportion can be used flexibly, but the water stability quality must be guaranteed. General factories and communities have relatively low requirements for road layout design, while Chinese mainland has higher requirements).

1 material = 0.325t From the Song Dynasty to the Ming Dynasty, ships in China often used "material" as their size unit, and "200 material" and "2000 material" can often be seen in the literature.

In addition, the load of a ship is often measured by "stones". Furthermore, the ship is a solid, which has three commonly used dimensions: length, width and depth. Zheng He's inscription (the remnant tablet of Jinghai Temple) contains the records of "2000 timber" and "1500 timber" ships. But if we don't know exactly what "matter" is, we can't know exactly how big or how heavy the "2000 Material Ship" is.

Data expansion

Cement stabilized macadam (hereinafter referred to as water stabilized macadam), as a semi-rigid material, has good mechanical properties and integrity, stability (water stability and temperature stability), durability and frost resistance, high bearing capacity, good combination with surface layer, wide sources of materials, easy processing of raw materials and mixtures, easy mechanized paving operation, and is widely used in pavement base construction of high-grade highways.