The terrazzo paving construction process and maintenance First, the definition of terrazzo terrazzo is a commonly used building decoration materials. Because of its rich source of raw materials, lower prices, good decorative effect, and simple construction process, it has been widely applied. Terrazzo is also a kind of artificial stone. It uses cement as a cementing material and incorporates marbles or granite gravels of different colors and different sizes. After mixing, forming, curing, grinding and other processes, made of a man-made stone with a certain decorative effect.
Second, the commonly used materials terrazzo 1, cement: terrazzo 425 and above Portland cement, ordinary portland cement. Color terrazzo should be white or colored cement. For the same single project ground, the same factory batch of cement should be used.
2, sand: sand, through the 0.63mm aperture sieve, the mud content shall not exceed 3%.
3. Shizi (Shimi): The clean and uncontaminated marble particles should be used. The particle size is generally 4 to 12mm except for special requirements, or the large, medium, and small stones can be mixed in a certain proportion. The same unit project should adopt the same batch of origin stone. Stones of different color specifications should be stacked.
4. Glass strip: It is determined by design or cut into a glass strip with a width of about 10 mm (as determined by the stone particle size) with an ordinary 3 mm thick flat glass. The length is determined by the block size.
5, copper strips: with ≥ 3mm thick copper plate, width 10mm or so (depending on the stone size set), the length is determined by the block size, the copper bar must be straightened to use. At the bottom 1/3 of the copper bar, four holes of 2mm are drilled per meter.
6. Pigments: Light and alkali-resistant mineral pigments are used, and the blending amount is not more than 12% of the cement weight. Do not use acidic pigments, such as colored cement. Mix directly with stones.
7, other: oxalic acid, floor wax, ~ 1.0mm diameter lead wire.
Third, the construction process of terrazzo basic treatment: the concrete on the base layer of clean, can not have oil, floating soil. Use a steel tweezers and a wire brush to wipe off the cement screed that has been on the ground.
To find the standard high elasticity horizontal line: According to the +50cm elevation line on the wall, measure the elevation of the grindstone surface downwards and play it around the wall, and consider the elevations of the other rooms and channel surface layers to be consistent.
Wipe the leveling mortar: according to the horizontal line on the wall, leave the thickness of the surface layer (about 10 ~ 15mm thick), wipe 1:3 cement mortar leveling layer, in order to ensure the flatness of the leveling layer, first plaster the cake (horizontal and vertical spacing About 1.5m), size about 8 ~ 10cm. After the gray cake mortar hardened, with the height of the ash cake as the standard, wipe the vertical and horizontal ribs with a width of 8 to 10cm. Wet the base layer with water, brush a cement slurry with a water-cement ratio of 0.4-0.5. The area must not be too large. Wipe 1:3 screed with the brush, and use a 2m-long scraper to mark the reinforcement. The standard is flattened and then flattened with a wooden trowel.
Maintenance: wipe the screed after the mortar curing 24h until the compressive strength reaches l. 2MPa, the next process can be carried out.
Bulleted line: According to the design requirements of the grid size, generally lm × lm. After crosshairs are played in the middle of the room and the width of the perimeter is calculated, the crosshairs can be used as the dividing line. If the design has a pattern requirement, clear lines should be populated according to the design requirements.
Inserting strips: Use small iron trowel to thicken the cement slurry to fix the grid strips (the grid strips are on the grid lines) and wipe them into a 30° figure eight (Figure 7-1). The height should be lower than the score The top of the bar is 4 to 6mm, and the grids should be straight (the top must be the same), firm, and the joints tightly closed. No gaps are allowed, as a mark for laying the surface. In addition, when pasting the dividing strips, do not wipe the grout within 40 to 50 mm from the intersection point in order to make the mixing material filled and full at the cross-bar joint (Fig. 7-2).
Trial grinding: Generally, the number of curing days is determined according to the temperature conditions. The temperature can be 2 to 3 days when the temperature is 20 to 30°C. The grinding can be started. The premature opening of the grinding stones is easy to loosen; Therefore, it is necessary to conduct trial grinding so that the surface layer cannot be removed.
Coarse Grinding: The first pass uses a 60-90 rough diamond mill, so that the head of the grinding machine walks horizontally on the ground to “8†shape, adding water to the edge grinding (such as grinding stone surface maintenance time is too long, can add fine sand , speed up the grinding speed), clean the slurry at any time, and use the ruler to check the flatness, until the surface is smoothed and ground, the grid strips and stones are all exposed (the corners are artificially ground to the same effect), and the water is used for cleaning and drying. Dry it, and then use a thicker grout (such as a pigmented surface layer, apply a grout with the same pigment mix ratio) to wipe it again. In particular, the hole in the surface layer should be filled with small holes to smooth out the fallen stone. Grain should be filled. Water conservation 2 ~ 3d.
Fine grinding: The second pass uses a 90-120 diamond mill and requires grinding until the surface is smooth. Then rinse with clean water, wipe the second time with the cement slurry, still pay attention to small pores to carefully wipe tight, and then conservation 2 ~ 3d.
Polishing: The third round of grinding with 200 fine diamonds, grinding to surface stones exposed uniform, no stone phenomenon, smooth, smooth, non-porous degree. The number of ordinary terrazzo finishes should not be less than three times. The thickness of the senior terrazzo finish and the number of finishes and the size of the oilstone should be determined according to the design.
Oxalic acid scrub: In order to obtain a significant effect after waxing, before the faulty stone surface layer to carry out a moderate amount of acid pickling, generally scrubbed with oxalic acid, when used, the first to add oxalic acid into a solution of about 10% concentration Sprinkle it on the floor with a broom, and then lightly grind it again with whetstone; grind out the cement and stone grain colors, and then rinse with a soft cloth to dry. This operation must be completed after the completion of various types of work, after pickling the surface layer can no longer be contaminated.
Wrong glazing: Wrap the wax in a thin cloth and apply a thin layer on the surface layer. After drying, replace the oil stone with a wooden block with canvas or burlap. Grind it on the grindstone machine and use it in the same way. Wax the second time until it is smooth and bright.
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