What is terrazzo floor? How to restoration & repair terrazzo floor
Terrazzo (also known as millstone) is a product made by mixing aggregates such as crushed stone, glass, quartz stone, etc. into a cement binder, and then grinding and polishing the surface. Terrazzo which is made of cement bonding material is called inorganic millstone. Terrazzo which is made of epoxy bonding material is called epoxy or organic millstone. According to the construction process, terrazzo is divided into on-site pouring and prefabricated terrazzo floor .
Traditional terrazzo has the unique advantages of low cost, arbitrary color matching, and convenient construction. It has a huge market all over the world and is widely used in various urban and rural buildings.
Quality standard
Selection of materials: variety, strength (mixing ratio) and color should meet the design requirements and construction specifications.
The combination of the surface layer and the base layer must be firm and free of defects such as hollowing and cracks.
Ordinary terrazzo: smooth surface, no cracks, trachoma and abrasive grains, dense stone grains, uniform display, pattern meets design requirements, consistent color, no color mixing, solid, clear, straight lines.
High-grade terrazzo: the surface is smooth and smooth, without cracks, trachoma and abrasive grains, the stones are dense, the exposure is uniform, the adjacent colors are not mixed, the grid is firm, straight and clear, and the yin and yang angles are square.
Terrazzo surface layer has holes and pores: After the terrazzo surface layer is machine-ground, some holes always occur. Generally, the grouting method is used. Apply the same color pigment and cement to wipe) wipe the holes tightly, and polish them after hardening; the ordinary terrazzo surface layer uses the “two-slurry and three-brush” method, that is, the whole process is polished three times and then wiped twice. If you do not need to wipe the map once, or use a broom instead of wiping or using slurry, it is easy to cause small holes in the surface layer (in addition, the polishing is not hardened after polishing, and it is also easy to put holes in the holes. Grind off).
Terrazzo floor advantages:
High-grade terrazzo (also known as commercial terrazzo) has a high-brightness of 70 ~ 90 degrees. After lightness treatment, the level of dust resistance and anti-slip quality could be almost as same as marble floor.
The hardness of wear-resistant terrazzo floor can reach 6-8 grade.
Existing or prefabricated terrazzo, can be freely spliced, and colors can be customized.
The new type of terrazzo does not crack, no afraid of heavy rolling, dragging heavy objects, and does not shrink and deform.
Dust-free and high cleanliness; cleanliness meets the requirements of high-clean environments such as pharmaceuticals and chip manufacturing.
Inorganic terrazzo is non-combustible, anti-aging, anti-fouling, anti-corrosion, no odor and no pollution.
The color is beautiful and bright. If you need to improve the floor lightness, wax or crystallize it (not affect its antistatic performance). The terrazzo after harden wear-resistant treatment could maintain long-term brightness without waxing.
The decorative grids of on site pouring terrazzo are horizontal and vertical. There is no gap between the grids, and the connections are dense. The overall aesthetics are good. Commercial terrazzo can design patterns arbitrarily to achieve beautiful decorative effects.
Terrazzo disadvantages:
The traditional construction technology caused the terrazzo floor to be very rough, dirty and dirty, and even before it was delivered for use. It also caused serious obstacles for daily sanitation. However, over time, it has encountered very prominent problems in actual use: stains and dullness. How to restore the weathered and abraded terrazzo to its original beauty is an increasingly urgent problem for the building decoration industry.
Terrazzo maintenance tips:
The reason why terrazzo is as bright as a mirror and crystal clear is mainly because the surface of the terrazzo after the machining process forms a glassy film. This layer of film not only has a mirror gloss, but also can transparently show the inner structure of the stone, which is what people observe. The beautiful pattern is here.
To restore the weathered, abrasive terrazzo to its beautiful beauty, the key is to re-form a glassy film on the terrazzo surface.
The technical principle of the terrazzo grinding and polishing machine:
Remove the weathered and abraded aging layer of the terrazzo surface to expose the fresh layer, and then use a special mechanical method to produce an extremely complex effect on the terrazzo surface to form a new glassy film, thereby restoring the terrazzo natural and beautiful decorative effect. The entire process includes multiple processes. Solve the problem fundamentally, make the rough and dirty terrazzo smooth and bright, treat the symptoms and the root causes, and achieve a mirror effect. Refurbishment costs are low. No pollution, no dust, no splash of water or noise during construction. For example, construction in shopping malls and hotels can be conducted while construction is underway. The traditional ground construction technology can be changed. For example, the ground can be laid with wool boards or patterned before grinding. Not only can reduce the cost, but also eliminate the splicing seams during construction.
How to grinding and polishing terrazzo floor?
Clean the floor surface
Clean up the sundries on the floor, no oil and floating soil. Use a steel ladle and a wire brush to scoop out the cement slurry .
Coarse grinding
The first pass, #60 metal grinding pads, in an “8” shape and add water while grinding. clean the cement slurry at any time, and use the ruler to check the flatness, until the surface is flattened and smoothed, the grid bars and stones are all exposed (Grind corners with an edge grinder to achieve the same effect), washed with water Dry, and then wipe it with a thicker cement slurry (such as a surface layer mixed with pigments, using the same cement slurry mixed with pigments), especially the small pores in the holes of the surface layer must be filled and smoothed, Grains should be filled. Watering for 2 ~ 3d.
Fine grinding
The first pass, #120 metal grinding pads. It is required to grind until the surface is smooth. Then rinse with clean water, rub the cement slurry a second time, still pay attention to the small pores to be carefully wiped tightly, and then cure for 2 to 3 days.
Polishing
The first pass, #120 metal grinding pads. The fine diamond is used to grind the stones until the surface is evenly exposed, without stone defects, smooth, smooth, and free of porosity.
Grind with a grinder with resin polishing pad #50, #100, #200 (wet grinding with water). Grind 1-2 times depending on the ground conditions.
After the floor is dry, spray Lithium concrete hardener on the floor and push it evenly with dust sweeper.
After the ground is dry, add water to moisten the ground and grind floor with resin polishing pad #400, #800, #1500, step by step.
Use the high-speed polishing machine to dry the ground with scouring pad. (If there is no high-speed polishing machine, the grinding machine can be used with scouring pad)
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