Masonry cement has high early strength, good frost resistance, poor heat resistance, poor corrosion resistance and high hydration heat. Ordinary cement is generally gray-black, and the most commonly used cement in buildings is also called black cement. White cement is generally used for decoration and repair, while black cement is used for building.

Check the package

Look carefully at the outer package of cement to see if it is worn, and then check if there are obvious traces on it. Mainly to check the registered trademark and packaging date of cement. After production, the shelf life of cement is one month. If it's beyond the shelf life, you'd better check it again to see if you can continue to use it.

Color judgment

The quality of cement can be judged by its color. If the color of cement is grayish white, it means that the quality of cement is good.

Feel check

Grab a proper amount of cement and feel the touch of cement with your hands. If the cement feels rough, it means that the quality of cement is not very good, and the quality of cement that feels smooth is also good.