Question one: How to prevent uneven seams on the surface of the plate, uneven gaps
When tile materials such as granite, terrazzo, marble, and floor tiles are used as ground decoration materials, the phenomenon of uneven seams, uneven gaps, etc. occurs at the splices of adjacent plates after paving, which is a common quality problem for the surface coating of the plates. The main reasons for this quality problem are the following:
(1) The plates themselves are of different thicknesses, geometrical dimensions are inaccurate, warping, skewing, and other defects, and lax plying is not selected before, so that after the paving, patchwork seams are uneven and the gaps are uneven.
(2) No need to use a level ruler to level the surface of the plate, and the plate does not pass through the long cable, which can make the plate joint uneven and uneven.
(3) After the surface of the plate is paved, the finished product is not well protected. During the maintenance period, people walk or use it in the morning, and the board seams are prone to uneven.
To prevent this quality problem, you should do the following in construction:
(1) Strengthen the quality inspection of incoming plate materials. The geometrical dimensions are inaccurate, warpage, skewness, and thickness deviation are too large. Cracks, falling angles and other defects must be removed.
(2) Before paving, the room should be taken in four sides, and the crosshairs should be popped up on the ground. After laying out the standard block, it should be laid in order from the middle to the sides and back, and be leveled at any time with a ruler and ruler. You must pull the cable through the length without deviation. Sectional dimensions must be scheduled in advance to avoid death, so as not to cause the last piece of the shop can not be on the shop or the gap is too large adverse consequences.
Question two: How to prevent the empty floor of the plate
In the process of home decoration, terrazzo, marble and other plates were laid, and empty drums were struck with a small hammer. Seriously, some people would loosen when walking around. The main causes of this quality problem are:
(1) The surface of the grass roots is not clean or wet enough for watering, and the uneven binding or brushing time of the brushing cement slurry makes the wind of the cement slurry hard and does not act as a bonding effect, resulting in the surface layer and base layer of the plate. Hollow together.
(2) Before the surface of the slab is laid, the back surface floating ash is not brushed and wetted. If the dry slab is directly paved during construction, the moisture in the cement mortar will be quickly absorbed by the slab, causing the dehydration of the mortar to be affected. The condensation hardens, reduces the strength of the mortar, and affects the paste of the mortar and the base layer, the mortar and the plate.
(3) The laying mortar should be dry and hard mortar. If more water is added or the mortar is not real, it will not be even and it will cause hollowing of the floor.
In order to prevent empty drums on the floor, the following points should be made during construction:
(1) The surface of the grass-roots level must be cleaned and watered and moistened so as to ensure that the cushion and the grass-roots layer are well-integrated. The surface of the grass-roots level should be evenly brushed with pure cement slurry, and be combined with a layer of cement mortar with the brush.
(2) Before laying the surface of the slab, the debris on the back of the slab should be cleaned first, then wetted with water, and the slabs should be laid optimally when they reach the surface dryness.
(3) The bonding layer is a dry-hard cement mortar, its mixing ratio is usually 1:2 to 1:3 (cement:sand), cement uses ordinary portland cement no less than 325, and sand should be medium-grit, containing The amount of mud is not more than 3%. Sieve the sieve to remove organic impurities. The consistency of cement mortar should be 2~4cm. The thickness of dry hard cement mortar should be well controlled (usually 2.5 to 3.0 cm). When the plate is trial-stored, the plate placed on the paving position is vertically and horizontally aligned, and a mallet (or wood hammer) is used to gently tap the middle of the plate so that the mortar vibrates densely and is hammered to the paving height. After passing the plate trial pass, lift the stone and check whether the mortar binding layer is smooth and dense. Add mortar, pour a layer of pure cement with a water-cement ratio of about O.5, then lay the original plate and drop the four corners at the same time. Tap with a small mallet and level with a level ruler.
(4) After the plate is tiled, the plate seams are seamed on the second day. Before filling, the floor should be cleaned and the loose mortar in the joint should be cleaned off. The grouting should be performed several times. Scrape the inside of the joint with a scraper, and then use the same color grout to perform joint cleaning until the joint is filled. Grout. Then use a soft cloth to wipe off the mortar that adheres to the plate, and do a good job of maintenance and protection. No one is allowed to walk or use during maintenance.
Question 3: How to prevent the dislocation of the cast-in-place millstone floor
Some households used terrazzo floors on the ground when they were decorating and decorating their homes. After doing a good job, they often found that the sub-grid bars were unclear, like a pure cement strip. The main reasons for this phenomenon are:
(1) The thickness of the surface cement grout is too high, making it difficult to grind out the grid segments.
(2) After the surface cement grout is laid, the grindstone is not timely, resulting in excessive strength of the surface cement stone, making it difficult to grind out the sub-grid.
To prevent this from happening, it must be done during construction:
(1) Control the laying thickness of surface cement grout, and the thickness of virtual store is generally 5mm higher than the dividing line. Rolling back and forth with the roller compacted after the score is about 1mm higher.
(2) The terrazzo grinding time should be controlled well. Generally, the terrazzo is opened when the strength of the terrazzo surface reaches 10%. The intensity is too low, the grinding time is too early, and it is easy to drop stone when polished.
Question 4: How to prevent bending deformation of cast-in-situ grindstone floor grid
After the terrazzo floor is well grounded, due to improper construction, the floor grid will bend and deform, affecting the appearance of the floor. The main reasons for this phenomenon are:
To solve this quality problem, we must do the following in construction:
(1) Control the thickness of the surface cement mortar slurry, generally should be about 5mm higher than the score grid.
(2) Before the roller is rolled, use a trowel or a wooden trowel to gently pat on both sides of the dividing line about 10cm, and use the trowel to slightly press a small splay to the inside of the dividing line. Prevent the rollers from squeezing the grid during roller compaction.
(3) During the rolling process, the stones stuck on the roller or on the dividing bar shall be removed at any time with a broom to prevent the presence of stones between the roller and the dividing bar to crush the dividing bar.
(4) The grid bars should be firmly attached. Before laying the cement stone sizing surface layer, carefully inspect it again and find that the grid strips are not stuck firmly, loose or bent and should be replaced or re-embedded in time.
(1) The thickness of the surface layer cement paste slurry is not enough. When the roller is used to roll back and forth, it can be rolled directly on the partition strip, resulting in deformation or crumple of the partition strip.
(2) In the rolling process of the drum, sometimes the stone sticks to the drum or the grid. When rolling, it is easy to bend or deform the grid.
(3) The grid strips are not stuck firmly, and the rollers are pressed back and forth. As the stones are pressed against each other, the grid bars are broken.
Question 5: How to prevent the uneven surface of plastic flooring from being waved
Some households used plastic flooring when decorating the living room. After laying, they found that the surface was flat and the visual surface was wavy. The reason for this phenomenon is mainly due to the fact that the following points were not noticed during construction:
(1) The surface roughness of the grass-roots level is poor, and unevenness is uneven.
(2) When the operator scratches the adhesive, the gesture is heavy and the coated adhesive has a pronounced wavy shape.
When the plastic floor is affixed, the diluent in the adhesive is volatilized, the colloid flowability is poor, and the paste is not easy to smooth, so that the surface layer is wavy. To prevent this quality problem, you must do:
(1) Strictly control the surface flatness of the adhesive base layer, and perform the leveling treatment on the surface with an unevenness greater than ±2 mm.
(2) Squeegee the adhesive with a toothed squeegee so that the thickness of the adhesive layer is thin and uniform. When scratching, the scratching direction on the adhesive surface of the base layer and the plastic plate shall intersect vertically and horizontally so that when the surface layer is laid, the adhesive layer of the adhesive surface is uniform.
(3) The construction temperature should be controlled at 15 to 30 degrees, and the relative humidity should not be higher than 70%.
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