2010-04-27
I. Introduction
People tend to think that Stone is a long-lasting high-grade decoration materials, stone decoration will once and for all. In actual fact, in the natural
environment, dust, exhaust, acid rain, frozen, and other pollutants used in the construction on stone easily cause discoloration, contamination or damage,
greatly reduced Stone decorative effect and service life at the same time, due to errors in construction method will result in stone decorative effect of
the failure to have in the short term re-decoration of the building, resulting in substantial waste of resources.
To stone results in various diseases and shorten the life of many reasons, summed up in the professional speaking mainly: First, internal reasons: both
stone of structure and chemical composition caused by changes; second, external reasons: both mining and processing methods, construction techniques, use of
environmental and other factors.
Second, affect stone life and produce stone main disease
Common stone disease are: water spots quit, return to base salt, white China, vomiting yellow rust, frost damage, surface corrosion, pigment pollution
(including oil), moss growth and powder and pineapple. To stone results in various diseases and shorten the life of many reasons, summed up in two main
aspects: First, internal reasons, that stone of texture and structure and chemical composition caused by changes; second, external factors: the mining and
processing methods, installation and construction process and the use of environmental impact of such factors.
1, from the stone internal reasons
(1) Stone its structure: natural stone exist in both micro-cracks and pores, the adsorption constant, daily would be fine in dust and air pollution
material, as capillary action and slowly infiltrated into the stone internal, thus greatly reducing the stone decorative performance and service life. The
smaller the pore, capillary action, and the stronger surface adsorption.
(2) the relatively complex chemical composition: Stone some components easily with the external environment play a role, so that stone produce erosion or
Variation.Stone generally contain varying degrees of iron components, the erosion by moisture will produce yellow rust.
Stone in the higher iron content, rust Huang Yuerong easy to produce.In addition, most of the main component of natural marble carbonate, such as calcium
carbonate and magnesium carbonate, there is a small amount of alkaline oxide. Calcium carbonate and magnesium carbonate are relatively stable compounds, but
some basic oxides chemically unstable, in the humid environment, trade and air in the acidic oxides such as carbon dioxide, sulfur trioxide sulfur dioxide
nitrogen chemical reaction occurs to change the physical structure within the marble. Will be similar to the chemical destruction of the other stone
occurred, the light will stone surface dull, and even color Fading, there scar; weight who make natural stone hardness decreased, surface weathering
spalling.
2, from the stone external causes
Affect the stone decorative effect and service life of the external reasons, such as mining and processing, storage and transportation process of improper
maintenance, installation of stone adhesive used the impact of material and natural factors.
(1) mining and processing and storage and transportation of: such as stone the crack may be related to inappropriate mining method; processing of iron
tools used may stone produce yellow rust left hidden, inappropriate stone cooling fluid may be contaminated stone ; storage and transportation of
inadequate maintenance, but also make stone produce straw yellow rust, and other pollution.
(2) installation and construction process and the impact of bonding materials: If you install stone paste used the wet cement paste mortar construction
method, the cement in the alkaline soluble material will be eroded due to rain and along the stone pores seeping to the surface, while alkaline compounds
such as Ca (OH) 2 with CO2 and H2O in the air a chemical reaction of CaCO3 in the stone surface crystallization phenomenon of the formation of salt back to
base. In addition, because cement hydration salts have produced some of the moisture absorption, penetration stone will absorb moisture from the air in the
stone surface the formation of water spots, seriously affecting appearance. In addition, improper use of the paste material, such as some stone paste
glue, may also make stone produce yellowing.
(3) environmental factors: environmental factors include pollution, acid rain and frozen destruction. The natural environment of air pollution, acid rain
and other man-made pollutants on the stone pollution and corrosion. In addition, damage is also a frozen environmental factors can not be ignored, because
stone has a water absorption (even with the construction of the hanging stone ), in cold winter, because ice and accelerate the weathering process and
reduce its strength, not only affect the life, but also a threat to personal safety.
Our company has become a famous enterprise in producing and exporting stone company's main business: countertop,G682, China-granite, etc.