When the pores in the natural marble absorb enough water, once the temperature drops below 0 °C, the water in the natural marble begins to freeze and the volume expands. When the expansion force of the ice cube is greater than the structural force of the natural marble, the natural marble will be broken.
The cause of the formation of natural marble freeze-thaw
Generally speaking, substances are subject to the law of "thermal expansion and contraction", and water is just the opposite. The density of water is greatest at 4 ° C, and water molecules operate independently in fluidity. The water is cooled from 4 ° C to 0 ° C. The water molecules in the ice are arranged in a three-dimensional pattern in an unusually loose form. This structure actually leaves a lot of "voids" and the density is reduced. Experiments have shown that when 1 cubic meter of water is formed into ice, its volume will increase to 1.11 cubic meters. Therefore, when water enters the pores or gaps of natural marble, it freezes and freezes, and the volume increases, thereby swelling the pores or gaps of the natural marble. Then, the natural marble inhales more water, and the pores or gaps are further swollen. Such a vicious cycle eventually led to the fragmentation of natural marble.
Prevention of freezing and thawing of natural marble
Since the main factor caused by the freezing and thawing of natural marble is water, we can prevent the freezing and thawing of natural marble by simply blocking the water from entering the natural marble.
Therefore, we only need to use natural marble curing agent to protect the natural marble.