One, In addition to thermal insulation and moisture-proof materials for cold storage installation and design, materials such as bricks, stones, cement, concrete, mortar, rebars, and wood are used in large quantities. The construction materials used in cold storage are often exposed to low temperatures and humidity, thus requiring special properties of frost resistance and water resistance in the materials used for cold storage design.

When bricks and stones are used for the exterior wall of cold storage, the requirement is that the strength grade should not be lower than MU7.5 and the frost resistance level should not be lower than 25. If they are used for the inner wall or internal partition wall of a low-temperature cold storage, the strength grade should be at least MU10 and the frost resistance level should not be lower than 35.

The frost resistance of common silicate cement is good, thus the structural components for cold storage's low-temperature rooms and freezing sections should be primarily selected with common silicate cement. This is because slag cement also exhibits excellent frost resistance.

The cold storage has always been maintained at low temperatures, which makes the moisture in the foundation prone to freezing. This leads to the expansion of the land volume, causing severe deformation of the entire building structure and rendering the cold storage unusable. Therefore, the design materials for cold storage must have excellent insulation properties to prevent the ground from being affected by low temperatures, thereby avoiding structural deformation and cold storage failures!

Five, the specification for cold storage design states: The concrete grade of general cold rooms should not be lower than C20, and the water-cement ratio should not exceed 0.6; the concrete grade of freezing rooms should not be lower than C30, and the water-cement ratio should not exceed 0.55. A lower water-cement ratio can lead to poor workability, difficulty in compacting, more pores, and more water absorption. The higher the water-cement ratio, the more voids in the concrete. This only increases the construction difficulty and reduces the construction progress. Test results prove that concrete with a water-cement ratio of 0.55 to 0.6 has the best frost resistance performance.

Six, due to the long-term operation of cold storage at low temperatures, especially the periodic freezing and thawing, it is prone to damage the building structure. Therefore, the design materials for cold storage must have good frost resistance to avoid various factors detrimental to the operation of the cold storage, leading to increased maintenance and operating costs for the cold storage in the later stage!