Construction method for precast terrazzo

Abstract

Provided is a construction method for precast terrazzo. The construction method for precast terrazzo comprises the following steps: S1, making marking lines on a base surface area for the laying of the precast terrazzo; S2, laying the precast terrazzo according to the marking lines to form a terrazzo floor; and S3, performing a protective treatment on the terrazzo floor, and performing sealing and curing on a surface layer of the terrazzo floor after the protective treatment. In the construction method for precast terrazzo, after the precast terrazzo is laid, the protective treatment is performed, and sealing and curing are performed on the surface layer of the terrazzo floor after the protective treatment, thereby improving the waterproof and stain-resistant performance of the terrazzo floor.

Description

Construction method of prefabricated terrazzo Technical Field

[0001] The invention relates to the technical field of terrazzo construction, in particular to a construction method of prefabricated terrazzo. Background Art

[0002] When prefabricated terrazzo is laid, although the surface of the prefabricated terrazzo has been polished and waxed for protection when it leaves the factory, the construction environment is generally complex, and the operation of the surface of the prefabricated terrazzo during the construction process will damage the protective layer of the bathroom terrazzo surface. Therefore, after laying is completed, the prefabricated terrazzo will lose its own water-repellent and anti-fouling properties.

[0003] Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a construction method for prefabricated terrazzo. After the prefabricated terrazzo is laid, it is protected and treated, and the surface layer of the terrazzo floor is sealed and cured after the protective treatment, thereby greatly improving the waterproof and anti-fouling properties of the terrazzo floor.

[0005] The present invention provides a construction method for prefabricated terrazzo, comprising the following steps:

[0006] S1, marking lines on the base surface area for prefabricated terrazzo laying;

[0007] S2, laying the prefabricated terrazzo according to the marked lines to form a terrazzo floor;

[0008] S3, performing protective treatment on the terrazzo floor, and sealing and curing the surface layer of the terrazzo floor after the protective treatment.

[0009] In one embodiment, the step S1 of marking a line on the base surface area for prefabricated terrazzo paving further comprises:

[0010] S101, inspecting and cleaning the base surface area;

[0011] S102, dividing lines and leveling lines on the cleaned base surface area according to the design drawings.

[0012] In one embodiment, step S1 may further include:

[0013] S103, selecting a dividing line on the base surface area to form at least two divided areas and laying prefabricated terrazzo thereon;

[0014] S104, measuring the distance between the two prefabricated water-treated terrazzos and the relative positions of the prefabricated water-treated terrazzos.

[0015] In one embodiment, step S1 may further include:

[0016] S105, brushing a cement slurry bonding layer on the separation area;

[0017] S106, applying a sizing surface layer on the cement slurry bonding layer, and flattening and calendering the layer.

[0018] In one embodiment, the step S2 of laying the prefabricated terrazzo according to the marked lines to form the terrazzo floor further includes:

[0019] S201, preparing an adhesive;

[0020] S202, applying adhesive on the back of the prefabricated terrazzo;

[0021] S203: Lay prefabricated terrazzo in corresponding separated areas to form a terrazzo floor.

[0022] In one embodiment, the step S2 of laying the prefabricated terrazzo according to the marked lines to form the terrazzo floor further includes:

[0023] S204: Leveling the surface of the terrazzo floor.

[0024] In one embodiment, the step S2 of laying the prefabricated terrazzo according to the marked lines to form the terrazzo floor further includes:

[0025] S205, the terrazzo floor is watered and cured, and then air-dried for seven days.

[0026] In one embodiment, the step S3 of performing protective treatment on the terrazzo floor and sealing and curing the surface layer of the terrazzo floor after the protective treatment further includes:

[0027] S301, drying the terrazzo floor, and spraying a protective agent on the dried terrazzo floor until the terrazzo floor is saturated with the agent;

[0028] S302, spraying a sealing curing agent on the surface layer of the terrazzo floor after the protective treatment.

[0029] The construction method of prefabricated terrazzo provided by the present invention performs protective treatment after the prefabricated terrazzo is laid, and seals and solidifies the surface layer of the terrazzo floor after the protective treatment, thereby greatly improving the waterproof and anti-fouling properties of the terrazzo floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0031] FIG1 is a schematic flow chart of a construction method for prefabricated terrazzo provided by the present invention. DETAILED DESCRIPTION

[0032] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, and not all, of the embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the description of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0033] In the description of the present invention, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0034] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0035] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order.

[0036] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0037] 1 , the construction method of prefabricated terrazzo provided by the present invention comprises the following steps:

[0038] S1, mark the base surface area for prefabricated terrazzo laying.

[0039] It is understandable that the above step S1 further includes:

[0040] S101, inspecting and cleaning the base surface area.

[0041] It is known that the inspection may include the inspection of the surface flatness and strength, whether the surface of the base layer or leveling layer has sufficient strength, and whether there is powdering or sanding.

[0042] For base layers with low strength or powdery or sandy texture, reinforcement treatment should be done first, and the pasting construction should be carried out only after confirming that the strength meets the standards.

[0043] In the case of hollowing of the base layer, scrape off the hollow, broken and loose parts and repair them with repair mortar. Subsequent construction can only be carried out after the repaired base surface has a certain strength.

[0044] The above-mentioned base surface flatness inspection can use a 2m straightedge or a wedge-shaped feeler gauge, and the maximum allowable flatness deviation is 3mm.

[0045] The above-mentioned base surface strength inspection has the following strength requirements for the base surface: tensile strength ≥ 1.2MPa, shear strength ≥ 1.0MPa.

[0046] The base stiffness requirement is that the maximum surface deflection of the base under all loads shall not exceed 1 / 480 of the span.

[0047] In addition to the above inspections, the setting of the base surface cutting seam can also be checked.

[0048] In order to ensure that the above-mentioned base surface is solid, free of cracks, hollows, sand, roughness, oil stains, dirt and other defects, the base surface can be formed by pouring C25 fine stone concrete and should be cured for more than 28 days.

[0049] You can also check the moisture content of the base surface: during the inspection, you can use a moisture meter to detect the moisture content of the base layer. When the base surface is concrete or mortar, the moisture content should be less than 5%. For the base surface of the first floor, it may be affected by continuous moisture on the base of the base surface. A waterproof and moisture-proof layer should be made first, and then terrazzo should be laid.

[0050] The above cleaning may include cleaning of dust, oil, release agents and other substances that affect the adhesion between the adhesive and the base surface, wherein the above cleaning may be performed manually with an industrial vacuum cleaner.

[0051] S102, dividing lines and leveling lines on the cleaned base surface area according to the design drawings.

[0052] It is understandable that the design drawing contains information such as the corresponding dividing lines, the distance between adjacent dividing lines, and the intersection position of the intersecting dividing lines.

[0053] S103, selecting a dividing line on the base surface area to form at least two divided areas and laying prefabricated terrazzo thereon;

[0054] S104, measuring the distance between the two prefabricated terrazzos and the relative positions of the prefabricated terrazzos.

[0055] It can be understood that the paving order and the position of the prefabricated terrazzo of each standard are determined according to the separation area formed above. In the separation area, the prefabricated terrazzo is tried out according to the pattern, color and texture of the prefabricated terrazzo, the gap between the two prefabricated terrazzo is checked, and the relative position of the prefabricated terrazzo and the wall, column, pipeline opening, etc. is checked, so as to determine the above-mentioned marking effect.

[0056] S105, apply a cement slurry bonding layer on the separation area.

[0057] It can be understood that the cement slurry bonding layer can adopt DSM20 mortar cushion layer, and the cement slurry bonding layer can be brushed with a roller brush. The brushing should be uniform and no gaps should be left, so as to increase the base surface strength and the bonding strength with the subsequent adhesive.

[0058] S106, applying a sizing surface layer on the cement slurry bonding layer, and flattening and calendering the layer.

[0059] It is understood that the sizing surface layer can be made of DS mortar. The DS mortar surface layer can be smoothed with a scraper against the ribs. After the slope is determined, it can be smoothed with a wooden trowel for the first time, and then checked for smoothness with a wooden bar. After the DS mortar surface layer has initially set, it can be pressed with an iron trowel for a second time to smooth and polish the surface. A third smoothing pass should be performed before the DS mortar surface layer reaches final setting. This smoothing and polishing must be completed before final setting.

[0060] It can be known that the above purpose is to perform leveling treatment, and the total thickness of the cement slurry bonding layer and the sizing surface layer can be 30 mm.

[0061] S2, laying the prefabricated terrazzo according to the marked lines to form a terrazzo floor.

[0062] It can be known that the above step S2 further includes:

[0063] S201, preparing an adhesive.

[0064] It is understood that the adhesive can be a two-component adhesive, comprising an emulsion component and a powder component, prepared according to the specified ratio and product requirements. During preparation, the emulsion component is first weighed (the emulsion dosage is approximately 23% of the dry powder weight) and poured into a clean mixing bucket. The powder component is then added in the specified proportion and stirred evenly with a low-speed electric stirrer until a creamy consistency is achieved. The adhesive is allowed to mature for 5 minutes and then stirred briefly before use. The adhesive has a workable time of 2.5 hours at room temperature, where the workable time refers to the time from preparation to use.

[0065] S202, applying adhesive on the back of the prefabricated terrazzo.

[0066] It is known that before applying adhesive to prefabricated terrazzo, the prefabricated terrazzo must be kept dry, and the moisture content of the prefabricated terrazzo should be as low as possible or close to the equilibrium moisture content. The bonding surface of the prefabricated terrazzo should be kept clean.

[0067] To clean the back of prefabricated terrazzo, you can use a paint brush to remove the dust on the back of the terrazzo, use a putty knife or a small spatula to remove the sharp protrusions and hard attachments on the back, and then use a sponge dipped in water to clean the back of the stone.

[0068] When applying the adhesive on the back of terrazzo, a 12*12mm E-shaped toothed trowel can be used. The adhesive used is the "high-flexibility" adhesive produced above. Use the straight edge of the E-shaped toothed trowel to flatten the adhesive on the back of the clean prefabricated terrazzo and apply a layer with a thickness of about 1-2mm; then use the straight edge of the E-shaped toothed trowel to chamfer the adhesive on the four sides of the prefabricated terrazzo at an angle of less than 45° to prevent excess adhesive from being squeezed out and contaminating the surface of the surface material during pasting.

[0069] It should be noted that when using the adhesive, attention should be paid to the aging of the adhesive. It must be ensured that the adhesive is applied to the prefabricated terrazzo in time before the adhesive surface forms a film. If the adhesive surface forms a film, it will be difficult for the prefabricated terrazzo and the DS mortar surface layer to be effectively bonded by the adhesive, the bonding strength will be greatly reduced, and it will easily lead to hollowing during laying. To judge the effectiveness of the adhesive, you can use your fingers to lightly touch the combed adhesive to determine whether the adhesive surface has formed a film. If there is adhesive on your fingers after touching it, it means that the adhesive surface has not formed a film; if there is no adhesive on your fingers, it means that the adhesive has formed a film. At this time, all the combed adhesive needs to be scraped off, stirred evenly in a bucket, and combed again. The thickness of the above-mentioned adhesive should be uniform, and the adhesive thickness after scraping can be 10mm.

[0070] S203: Lay prefabricated terrazzo in corresponding separated areas to form a terrazzo floor.

[0071] When laying, place the prefabricated terrazzo coated with adhesive on the sizing surface in a timely and stable manner, and the four corners of the prefabricated terrazzo should land steadily at the same time.

[0072] After the prefabricated terrazzo is laid on the ground, it is necessary to use a positioner of appropriate specifications to adjust the position of the terrazzo to ensure that the size of the gap between adjacent terrazzo meets the design requirements and the width of the gap is consistent. It is generally recommended to leave a gap width of about 2mm. Adjust the gap width according to the size and length of the stone. After the gap is completed, clean the edge with a sponge in time.

[0073] After the terrazzo is positioned correctly, use a rubber hammer to gently tap the prefabricated terrazzo through a wooden board to firm it up. Then, gradually tap from the center outward with the rubber hammer until it is firm and level. When adjusting uneven prefabricated terrazzo, do not use a hard rubber hammer to directly tap the stone surface. Always use a wooden block to do so. Otherwise, you will artificially create hidden cracks in the prefabricated terrazzo. Replacing the stone later will be troublesome and unsightly. Therefore, avoid artificially damaging the prefabricated terrazzo and use a spirit level to level it.

[0074] During the above bonding process, it should be noted that the adhesive can be adjusted for 30 minutes, that is, the prefabricated terrazzo can be moved and adjusted within 30 minutes after pasting. It should also be noted that when paving, the prefabricated terrazzo should be slightly vibrated and kneaded to ensure effective bonding between the prefabricated terrazzo and the base surface. After paving is completed, it should be closed and maintained for more than 24 hours, during which time all traffic is prohibited.

[0075] When laying prefabricated terrazzo over 1.2m in size, use a large plate vibrator to vibrate from the inside out to remove air bubbles and improve the adhesive bond to prevent hollowing. Prefabricated terrazzo under 1.2m in size can be laid flat on the base surface with a rubber hammer to firm it down. While doing so, use a ruler to ensure the level of the paving.

[0076] After the prefabricated terrazzo is laid, it is necessary to prevent shrinkage and pay attention to changes in temperature and humidity at any time. If the external temperature and humidity change too much, the watering maintenance method should be used to slow down the moisture changes of the prefabricated terrazzo. In addition to watering maintenance within 24 hours after laying, it also needs to be dried for 7 days.

[0077] When prefabricated terrazzo is laid, the gap width can be 1.0 to 2 mm. After the gap is completed, the gap edge should be cleaned with a sponge in time; a 10 mm structural expansion joint should be reserved every 8 to 10 gaps in the vertical and horizontal joints, and the depth should be to the base surface to prevent the prefabricated terrazzo from bulging or cracking due to the stress of the surface or structure.

[0078] After waiting for the moisture in the joints of the prefabricated terrazzo to dry completely, use a slicer to cut and clean the impurities in the joints of the prefabricated terrazzo, use a high-pressure air gun to blow out the impurities in the joints between the prefabricated terrazzo stones and fill the joints.

[0079] The caulking can be done with AB glue or other flexible epoxy resin glue with a color matching. The caulking depth should be no less than 10mm, and the caulking color should be close to the stone color. After finishing, clean the surface caulking stains.

[0080] S3, performing protective treatment on the terrazzo floor, and sealing and curing the surface layer of the terrazzo floor after the protective treatment.

[0081] The above step S3 may further include:

[0082] S301, drying the terrazzo floor, and spraying a protective agent on the dried terrazzo floor until the terrazzo floor is saturated with the agent.

[0083] The protective agent product is made of organic silicon and organic fluorine materials as the main raw materials. Its strong permeability can penetrate deeply into the interior of the prefabricated terrazzo and chemically bond with the matrix material of the prefabricated terrazzo.

[0084] Before application, the protective agent must be equipped with a hair dryer to keep the ground as dry as possible. After it is completely dry, the protective agent should be sprayed all over until the ground is saturated with the agent.

[0085] The protective agent product used above is a fluorine-type protective agent, which is a solvent-based product with excellent waterproofness and certain oil and stain resistance. It forms a long-lasting, waterproof, oil-proof and stain-resistant protective layer and maintains the original air permeability, color and gloss of the prefabricated terrazzo. At the same time, it also has a good effect on preventing the prefabricated terrazzo from being damaged.

[0086] S302, spraying a sealing curing agent on the surface layer of the terrazzo floor after protective treatment.

[0087] Although prefabricated terrazzo slabs are polished and waxed in the factory, the surface layer should be sealed and solidified before the completion of the unit project because the cement slurry grouting during the installation process will pollute the surface layer and the finished product is not properly protected after installation.

[0088] Sealing curing agent is an active, colorless, odorless, non-toxic, non-flammable, transparent, water-soluble, green and environmentally friendly hardener. It is composed of inorganic substances, chemically active substances and complexes. It is easy to use and can effectively improve the sealing, dustproof, hard wear resistance and anti-penetration properties of terrazzo floors, preventing the penetration of pollutants, oil, grease and moisture.

[0089] From the above description, it can be known that the construction method of prefabricated terrazzo provided by the present invention performs protective treatment after the prefabricated terrazzo is laid, and seals and solidifies the surface layer of the terrazzo floor after the protective treatment, thereby greatly improving the waterproof and anti-fouling properties of the terrazzo floor.

[0090] The foregoing description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be readily conceived by a person skilled in the art within the technical scope disclosed herein are intended to be encompassed within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A construction method of precast terrazzo, characterized in that, It includes the following steps: S1. Draw marking lines on the base surface area for precast terrazzo laying; S2. Lay the precast terrazzo according to the marking lines to form a terrazzo floor; S3. Carry out protective treatment on the terrazzo floor, and seal and cure the surface layer of the terrazzo floor after the protective treatment.

2. The construction method of precast terrazzo according to claim 1, characterized in that, The step S1, drawing marking lines on the base surface area for precast terrazzo laying, further includes: S101. Inspect the base surface area and clean the base surface area; S102. Divide the partition lines and leveling lines on the cleaned base surface area according to the design drawings.

3. The construction method of the precast terrazzo according to claim 2, characterized in that, The step S1 may also include: S103. Lay precast terrazzo on at least two partition areas formed by selecting partition lines on the base surface area; S104. Measure the distance between two precast terrazzos and the relative positions of the precast terrazzos.

4. The construction method of the precast terrazzo according to claim 3, characterized in that, The step S1 may also include: S105. Brush a cement slurry bonding layer on the partition area; S106. Brush a sizing agent surface layer on the brushed cement slurry bonding layer and press it flat and smooth.

5. The construction method of the precast terrazzo according to claim 4, characterized in that, The S2, laying the precast terrazzo according to the marking lines to form a terrazzo floor, further includes: S201. Prepare the adhesive; S202. Scrape the adhesive on the back of the precast terrazzo; S203. Lay the precast terrazzo in the corresponding partition area to form a terrazzo floor.

6. The construction method of precast terrazzo according to claim 5, characterized in that, The S2, laying the precast terrazzo according to the marking lines to form a terrazzo floor, also includes: S204. Level the surface layer of the terrazzo floor.

7. The construction method of precast terrazzo according to claim 6, characterized in that, The S2, laying the precast terrazzo according to the marking lines to form a terrazzo floor, also includes: S205. Sprinkle water on the terrazzo floor for curing and air dry it for seven days.

8. The construction method of the precast terrazzo according to claim 1, characterized in that, The S3, carrying out protective treatment on the terrazzo floor, and sealing and curing the surface layer of the terrazzo floor after the protective treatment, further includes: S301. Dry the terrazzo floor, spray a protective agent on the dried terrazzo floor until the terrazzo floor is saturated with the agent; S302. Spray a sealant on the surface layer of the terrazzo floor after the protective treatment.

Images