The weather is getting colder and colder, and for stone caregivers, outdoor work has stopped. The ongoing nursing work has encountered some difficulties, such as protective construction, poor recrystallization treatment effect, freeze-thaw phenomenon, etc. So, how to do a good job of stone care in winter?
Low winter temperatures directly affect the effectiveness of protective construction
Winter stone care often requires protective measures such as waterproofing and pollution prevention. The application of protective coating requires an appropriate temperature because the stone needs to be preserved after the protective coating so that the protection can truly play a role. At room temperature and humidity below 70%, the protective and health preservation time takes 48 hours. And for every 10 degrees Celsius decrease in temperature, protection and health preservation require 2-4 times more time. Because health preservation takes too long, it is not recommended to carry out protective construction in cold winter, especially in environments below 0 degrees Celsius.
Low-temperature environment affects the effect of stone recrystallization treatment
We know that the recrystallization treatment of stone is a chemical reaction of crystallization agents under professional equipment polishing and grinding, where the crystal lattice on the surface of the stone is reorganized, forming a stronger and more stable chemical composition. Chemical reactions require appropriate temperatures, and the crystallization effect and efficiency of stone at room temperature are relatively good.
Stone care colleagues may have encountered this situation: underfloor heating stone is laid underneath, and the surface is prone to drying out during polishing, making it difficult to achieve good results. In the cold north, polishing the stone near the glass curtain wall cannot achieve the desired effect on the surface of the stone. This is mainly due to the low temperature near the glass, which affects the chemical crystallization reaction of the stone.
Low temperatures can also cause freeze-thaw phenomena in stone materials
The freeze-thaw phenomenon refers to the expansion effect caused by the formation of ice inside or around the gaps in stone during cold winter. The stress caused by water freezing in the pores of stone is one of the causes of stone cracks. People who understand the principles of materialization know that the smaller the pore size of stone micropores, the lower the vapor pressure of water in the pores, and the lower the solidification point. In some extremely fine micropores, the freezing point of water can drop by tens of degrees Celsius.
Therefore, stones with smaller pores are less susceptible to freezing damage, while some stones with larger pores, such as golden and golden beige, are prone to freezing damage during crack treatment. To avoid and reduce the damage of the freeze-thaw phenomenon to the surface of stone, for stones that often come into contact with water indoors and outdoors, we need to take preventive measures in advance to prevent the absorption of a large amount of water inside the stone, which may cause the stone to freeze.
On snowy days, it is necessary to take preventive measures against the impact of snow-melting agents on stone materials
After a snowfall, to prevent road slippage or quick snow removal, industrial snow melting agents are often sprinkled on the road surface. A snow melting agent is a chemical agent that can reduce the melting temperature of ice and snow, mainly composed of potassium acetate and chloride salts. The commonly used snow-melting agents are generally inexpensive chlorides, which have a certain degree of corrosiveness to asphalt roads.
The snow-melting agent scattered on the road surface, carried by pedestrians’ shoes onto the stone floor of the building lobby, can corrode the stone floor and cause the ground to lose its luster. In response to this situation, we need to lay outdoor water scraping mats in advance, and indoor stone floors should also be covered with absorbent mats, and a defense system should be in place. After the melting of ice and snow, it is necessary to clean the floor of the hall promptly, remove residual snow melting agents, and do a good job of crystal polishing on the surface of the stone.
Stone also has life. As we enter the cold winter season, we need to timely coat the stone with an anti-freezing coat.