Mineral powder is a general designation of stone powder and its substitutes that meet the engineering requirements. It is the product of crushing ore, a step of ore processing and smelting, and one of the most important steps. The hydrophilic coefficient of mineral powder is the ratio of the expansion volume of unit mineral powder in the same volume of water (polar molecules) and kerosene (nonpolar molecules). In highway engineering, the mineral powder whose hydrophilic coefficient is less than 1 is called alkaline mineral powder.