Product Application
Anti-static Emery Coating Structure
Construction Technology
| Process name | Specific practices and requirements |
| Surveying and laying out | (1) Review the entire site area according to the elevation points given by the general contractor, mark the 1M line of the building on the wall and column surface, and check the height between the cushion layer and the final finished surface to determine the final concrete layer thickness. (2) The compartment design specifies a compartment size of no more than 40M, and the one-time pouring is controlled within 1500M2. |
| Clean up the base | To increase the contact surface and adhesion between the concrete surface layer and the structural layer, use a concrete special milling machine to mill the original concrete surface layer, remove the surface slurry layer, and make the concrete base form a groove-shaped rough surface; then use sweeping and vacuuming (use a high-pressure water gun or high-speed sweeper when necessary), use manual chiseling to clean the uneven base and debris, and finally rinse with water to keep it moist. |
| Set up formwork | Arrange the construction area in a reasonable operation sequence in advance, and then support and fix the steel or wooden formwork according to each construction area. (1) Formwork support: According to the layout position, expand the formwork 10MM along the compartment line, and use the steel bar + channel steel fixing method. After fixing and stabilizing, use a level to adjust the surface elevation of the armor seam to make it consistent with the floor elevation, and the error is controlled within +1MM. (2) In the pouring area, 20MM thick extruded boards are used as isolation boards at all wall edges and column bases. The isolation boards are slightly higher than the floor elevation. The part that is higher than the floor after concrete pouring will be cut off after the concrete construction is completed. Ensure the continuity of the extruded boards on the wall and column edges, and fix them reliably to avoid loosening during concrete pouring. |
| Sweep the ground | Sweep the slurry before pouring concrete, about 1H before pouring. (1) Soak the ground (preferably for more than 8 hours). (2) Absorb the accumulated water in the low-lying areas. (3) Sweep the slurry, just wet the surface (you can use spreader mortar, and then sprinkle water to wet the slurry). |
| Tie up steel bars and pour concrete | (1) Place the steel mesh according to the design drawings, and ensure that the steel mesh is placed in the upper middle layer of the concrete (use pads). (2) First, manually flatten the concrete according to the floor elevation. (3) The concrete is delivered directly to the platform by a conveyor truck to increase the unloading speed. To ensure the quality of concrete floor paving, arrange 2-3 or more concrete pouring workers to cooperate in leveling the surface of the concrete spread on the ground so that the pile is slightly higher than the designed elevation (about 20-30MM). (4) At the same time, for the parts near the wall, exposed pipelines, columns, and the periphery of the formwork, the concrete material about 20-50 cm away from the wall, column (formwork) edge is vibrated and leveled with a manual vibrator and a horizontal scraper. (5) The width of the concrete material laid on the ground each time shall not exceed 5 meters, and the length shall be based on the formwork boundary. The construction direction is from left to right (along the short side direction) and from front to back (along the long side direction). The recommended daily pouring volume is 1500-2000 square meters. Calculated based on 8 hours of working time per day, the feed rate required is 20-30 cubic meters per hour. (6) Immediately use a large laser leveler or vibrating beam to level the areas where the edges and corners have been vibrated to ensure the flatness of the floor. Use a rail vibrating beam to level the shelf area, and a laser leveler to level other areas. (7) After the leveler is leveled, use a manual leveling scraper to perform a second leveling to remove floating objects on the concrete surface and improve the surface flatness again. |
| Construction of diamond wear-resistant aggregate | After the initial setting of concrete, when shallow footprints are left on the concrete surface after stepping on it, first use a trowel to dry-grind the surface. After the dry-grinding is completed, spread the hardener. The spreading method uses two methods: mechanical spreading by a spreader and manual spreading. The wear-resistant material is evenly spread in two batches according to the specified amount of wear-resistant material. The order is as follows: (1) Spread about 2/3 of the wear-resistant material evenly for the first time without adding water. (2) After the wear-resistant material absorbs a certain amount of water in the concrete (the surface wear-resistant material is wet), use a single-disc or riding double-disc heavy-duty grinder to grind and extract the slurry. (3) After the wear-resistant material hardens to a certain stage (about 2 hours), spread the second time and spread 1/3 of the remaining amount. After the second layer of wear-resistant material absorbs a certain amount of water, use a double-disc trowel to smooth it again. (4) After hardening to a certain degree, use a heavy-duty double-disc grinder to polish the surface. (1) Adjust the operating speed and angle of the grinder according to the hardening condition of the concrete. (2) Each step of grinding and polishing should be performed at least twice, depending on the weather and environment of the day and the requirements for surface gloss. (3) The polishing of the periphery and corner areas of the columns should be carefully carried out by hand, and a thin steel trowel should be used for matte finishing, to eliminate grinding marks and finish the corners. |
| Floor maintenance | The concrete pouring diamond sand wear-resistant floor can be watered and maintained 3 hours after the construction is completed. After the cutting is completed, the geotextile is laid and watered for maintenance. The maintenance time is not less than 7 days, and watering is carried out regularly to keep the finished floor surface moist to achieve the effect of curing concrete. |
| Cut the floor joints | (1) The concrete layer of the indoor floor should be provided with longitudinal and transverse contraction joints. The longitudinal contraction joints should be flat-headed or tongue-and-groove joints, evenly divided according to the column spacing ratio, and the spacing should not exceed 6 meters. The transverse contraction joints should be false joints, set at the axis, with a width of 5MM and a depth of 1/3 of the plate thickness. (2) Cutting method: wet cutting. (3) Cutting time: Due to the high temperature in summer, water loss is too fast. The cutting process starts 12 hours after the surface is polished and is completed within 36 hours to avoid irregular cracks caused by too fast water loss and excessive shrinkage stress. (4) Cutting depth: 1/3 of the plate thickness. (5) Cutting basis: along the column spacing and considering the aesthetics of the floor, cut at a spacing of 4~6M (not exceeding 6X6M). (6) Column edge cutting: The column edge cutting is 300MM column corner, and the seam width is 3-5MM. The column edge is cut in a diamond or arc shape. |
| Clean up the floor joints | (1) After the floor is cured and dried, remove all loose particles and dust from the cutting. (2) First insert a foam strip into the cutting. The diameter of the foam strip depends on the cutting progress at that time. (3) Use a glue gun to inject a sealant with long-lasting elasticity and fast curing to fill the seam, and naturally cure for 28 days. (4) Avoid introducing air when applying the sealant. (5) After the filling is completed, clean the ground and organize on-site inspection and acceptance by all parties. |
Finished Product Maintenance
Management is carried out in a zoned manner. Whoever does the work is responsible for it. Supervisors are set up to track and inspect the finished product protection in the work area every day. If any violation is found, rectification is ordered promptly.
For newly poured concrete and mortar, people are allowed to operate only after the concrete strength reaches 1.2MPA, so as not to damage the strength and apparent quality of the concrete.
For operations with heavy objects that are likely to cause heavy objects to damage the ground, the cross-construction team must lay wooden boards on the ground before construction. Heavy vehicles are not allowed to be used for construction, and cracks on the floor may occur.
For operations that are likely to cause ground pollution but do not involve heavy objects, the cross-construction team must lay colored strips before construction to protect the ground from pollution.
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