How to use lightweight gypsum mortar to lay marble floors and walls?

Lightweight gypsum mortar installation floor: Before marble floor construction, the construction site should be cleaned to prevent other processes from intersecting operations, and the marble specifications and quality should be checked. On-site trial arrangement and assembly, the marbles were piled up in categories, watered to soak the marbles, and dried. The construction process is: cleaning, springing thread, paving, filling joints, and protection.

1. Structural inspection. Before construction, check the foundation according to the requirements of the drawings. Construction must be within the allowable deviation range of the foundation. For example, the flatness of the ground, combined with the elevation requirements, check whether the thickness of the lightweight gypsum mortar layer meets the requirements. Site cleaning. Check whether there is a hollow layer in the original base layer. Chill out the raised parts of the base, repair the depressed parts, and make a cement-sand leveling layer if necessary. Water the site one day in advance to soak the construction base layer.

2. Establish the baseline, determine the horizontal elevation, establish equal height points on each reference point, and mark the baseline. Check whether the baseline is correct, compare it with the marble cutting layout diagram, and review it with the site. According to the design requirements and combined with the characteristics of the construction surface, the construction direction sequence is determined.

3. Water-moistened substrate. The floor must be cleaned before installation and the substrate must be moistened with clean water.

4. Apply cement slurry. After the foundation is moistened, start applying cement slurry on the ground to improve the adhesion.

5. Paste the base layer. The cement is 425 cement and the sand is medium-coarse river sand. Prepare lightweight gypsum mortar according to the ratio of 1:3, and squeeze it tightly with just enough humidity to prevent water from coming out.

6. Board installation,

1) Marble surface maintenance treatment.

2) Stone backside treatment: The first is the shovel net. For white series, beige series marble and white and gray granite, mix white cement with 107 glue and water before installation, and apply it evenly on the back of the stone like wall plaster, with a thickness of not less than 3MM. (Other dark stones jump After this step, you only need to shovel the net) and it must be dried in the shade before installation.

3) Check whether the marble number is consistent with the layout diagram, and start installation from the baseline first.

4) Trial paving to determine whether the thickness is appropriate.

5) Apply a layer of pure cement slurry on the back of the marble, with a thickness of 5~8MM, lay it, and use a rubber hammer to vibrate the marble around to make the marble and pure cement slurry, pure cement slurry and mortar stick firmly together. , use a spirit level to measure the level, and control the size and straightness of the joints by pulling horizontal and vertical lines.

6) The reference line is the cross central axis. Install the cross reference plate first, and then extend it horizontally or vertically. During installation, you must constantly level it with a level to ensure the flatness of the board surface.

7) After the paving is completed, clean the marble surface, use a steel sheet to scrape the mortar or pure cement slurry in the joints, and fill the joints with pure cement slurry of different colors according to different requirements. (Marble glue must not be used for caulking)

8) To protect the finished product, the surface must be cleaned and wiped with light gypsum mortar within one day after construction is completed, and fiberboard or thin plywood or carpet must be laid as a protective layer.

Installation of walls using lightweight gypsum mortar pasting method: The marble pasting method is simple and quick to construct, takes up less space, and has low cost. Depending on the materials used, the pasting method can be divided into lightweight gypsum mortar pasting method and strong glue. Paste method.

Lightweight gypsum mortar pasting method: It is suitable for construction when the marble size is small and the installation height does not exceed 2 meters. The process sequence can be summarized as: cleaning, springing, pasting, and protection.

1. Structural inspection. Before laying marble, check the foundation according to the drawing requirements. Construction must be within the allowable deviation range of the foundation. If the wall is uneven, it needs to be smoothed with cement grout first. The base layer is required to have sufficient strength, flatness, rough surface, and no hollowing. Residual sand, floating dust, and oil stains on the surface should be washed away.

2. To establish the baseline, first determine the horizontal elevation, establish equal height points on each reference point, and mark the baseline. According to the horizontal joint size of the layout diagram, the height datum points at both ends of each horizontal joint are drawn through the elevation datum point, fixed on the wall with expansion bolts, and steel bars are welded to the expansion bolts. Marks are made on the steel bars, which are the datum points at both ends of the horizontal joints. point. According to the vertical seam size of the layout diagram, find the reference points at both ends of each vertical seam, and use woolen thread or thin steel wire to establish the horizontal and vertical reference lines. Check the accuracy of the blanking specification plate according to the layout diagram.

3. Arrange the steel bars. According to the horizontal height of each marble layer, install two expansion bolts on each marble slab, and then weld the steel bars on the bolts.

4. Slot the marble and cut it with a hand on the upper end of the marble.Open the U-shaped groove for hanging copper wire.

5. Moisturized substrate: The wall must be cleaned before installation and the substrate must be moistened with clean water.

6. Apply cement slurry. After the base is moistened, start applying cement slurry in order to improve the adhesion.

7. Prepare lightweight gypsum mortar, using 425 cement as cement and medium-coarse river sand as sand. Prepare lightweight gypsum mortar according to the ratio of 1:3, and squeeze it tightly with just enough humidity to prevent water from coming out.

8. Treatment of panels before installation and surface maintenance of stone. Treatment of the back of the stone: For white series, beige series marble and white and gray granite, mix white cement with 107 glue and water before installation, and apply it evenly on the back of the stone like wall plaster. The thickness should not be less than 3MM. It must be After drying in the shade, you can install it. Check whether the stone numbering matches the layout diagram. Start the installation from the baseline first.

9. Install marble.

1) Apply pure cement slurry to the back of the marble to improve adhesion.

2) Bolt the plate to the steel bar with copper wire, align it according to the baseline, and fix the marble with marble glue.

3) Follow the same method to fix all the boards of the same layer.

10. Use marble glue to patch the joints to prevent grout leakage during grouting.

11. Grouting: Generally, it should not exceed 300MM at a time to avoid bursting during grouting. Often the same layer of marble needs to be grouted in two or three times. (It can also avoid the hollow phenomenon caused by insufficient grouting)

12. Surface cleaning Wipe the surface with cotton yarn

The thickness of the wet laminated layer is generally 20-30mm. (Depending on the flatness of the wall To be determined, the thickness of the wet layer on flat walls is generally 20mm). The thickness of the adhesive layer when wet-pasted with glue is 10MM, which requires relatively high flatness of the base layer of the wall.

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