Egypt cream-colored class granite

Egypt in pavement construction of cream-colored granite and everyday use, often can appear some more specific problem and solve up is more difficult. For example: "long hair" (needle JieJingWu), "black", "ridge parts such as the most serious depression", is a massive collapse phenomenon (these phenomena of ballastless mostly in much water environment, wet installation ground, metope place, is warm ground also show serious). In order to solve the common lesions, the paper tries to petrology, chemical and granite application of lesions appear nursing the causes, prevention methods and marble technology to some preliminary discussion, for the reference.

2 lesions reasons

From the Angle of the petrography, Egypt cream-colored kind granite belong to the ancient Mediterranean deposition, carbonate rocks in the sedimentary diagenetic process, because pressure soluble function, or in the strata occur under static pressure, rock uneven dissolve, some substances enrichment formed tectonic surface, section called relict. This structure surface in sections indented curves, such as animal skull the combination shape of seam; Plane is an undulating surface. The main composition consisting slerilized are organic matter (also called bituminous), iron, manganese qualitative and mud gray matter.

The most significant relict characteristic is its composition of rock components and line both sides of the different shape and width, relict sedimentary environments have a direct relationship with the form, relict rock level changes, some shaped like the jagged, also some form a larger bending, overall is a straight line. Due to the different components of the seam and limegranite, binding) suture (is different also, color fastness bonding fastness, worst organic matter of iron and manganese quality ingredients cementation stronger, mud gray matter composition component. Although is suture (bond), but after all, not the original rock component, their structure surface or the weak part, processing the plank after slerilized place most often occur in fracture. Sometimes though fracture, but has formed without transfixion of foreign matter channels.

Egypt for the processing of cream-colored, granite cutting can form the vertical planes like parallel decorative pattern, such as "cashier line cream-colored" "gold thread cream-colored" "red lines cream-colored"; Shun level, can form the clouds shape cutting ring or irregular patterns, such as "splendid". Vertical level during cutting, relict sediments formed because of parallel development and decorative pattern, granite material to the natural defects seam parts hidden, rarely appears collapse of ballastleas; During cutting, parallel planes will form irregular surface seam ring pattern. Vivid rich decorative pattern which is very popular, but also exposed flaws in suture line, the main problem is that place occurrence sag, cock, collapse and slide ballastless FanJian relict of discoloration and etc.

From the granite material of applied chemistry in perspective, if Egypt by granite in such cream-colored is no contact moisture to affect, alkali, no strong external force, no greater temperature changes, general won't appear afore-mentioned problems, the granite material of vivid, elegant and beautiful decoration feature can be fully performance. But, if use cement mortar wet brick, installed in the metope of health asked or ground, or Limestone at the bottom of the heating facilities such as laying the ground, will appear afore-mentioned problems.

Explore its reason, mainly from three aspects: one is the natural defects, seam tectonic second is overmuch water and salt, three is too hot changes.

2.1 salinity-alkalinity composition exhalation crystallization (known as woolly) : Egypt cream-colored kind of granite material is this granite seam parts, especially the weakest part of the organic matter and mud gray matter composition seam. The physical structure within slerilized are relatively loose, strong permeability, easy to become moisture migration and evaporation channels, seam is actually a tectonic surface, can also be seen as a kind of granite natural aperture. When the shop is stuck the wet cement mortar and other building materials of soluble salt, alkali substances as the migration to the granite surface water, moisture evaporates in aperture place after the crystalline substances formed white. This kind of exhalation crystallization of the material not only damage granite, and the crystallization of beautiful on the granite gap and the stress tend to squeeze inflation, cause pore surface flake or granite powder spalling.

Egypt cream-colored or metope installed in the toilet ground when more common chromatography, alkali phenomenon by matter is sources inside toilet wall interior also have air and pollution of liquid.

2.2 foreign substances and enrichment pollution (known as the dark spots) : within the organic matter and mud relict grey matter composition, for osteoporosis and bibulous rate is higher, intensity far less composition, granite material surface carbonate formed along the seam, the local will form linear sag pits. Sag area will cause foreign pollutants and also causes enrichment biological reproduction. Enrichment of the pollutants containing human life, if diet and human activities to bring the dust and humus, and animal body metabolic hair debris, scurfy wait, time is long can create a lot of microorganisms, such as enzyme bacteria etc, make sag parts of the material color change, even black. This kind of pollution formation of discoloration phenomenon and the color and seam itself is very different from the material composition of granite material appearance, formed very big effect.

2.3 caved ballastless: natural granite material itself is a rigid material, have certain bibulous rate, the temperature changes will happen heat bilges cold shrink and freezing and thawing. As previously mentioned, Egypt cream-colored class granite in the physical strength within relict lower than the other major carbonate rocks by the ingredients, once granite, it is easy to stress role in causing stress destruction, seam parts of rock seam parts for cross contact, most of the interface can't be flat surface, have certain Angle differring, even acute Angle contact. In the above have acute Angle rock part of its wedge of cutting-edge by external force in (hard soles trample will produce great role), very easy in rock itself happening ruptures, resulting in the "collapse" phenomenon of ballastless occur.

granite installation in a geothermal pipelines site, hot contact will cause the thermal deformation, relict granite by closing into open state, or is as cold heat variations and repeated. Frequent deformation, necessarily causes structure changes, will be totally into transfixion relict relict aperture, the rock on both sides of the state, suspended in more likely to occur extensive "collapse" fall off. Alan kostelecky