Color wear-resistant concrete floor construction technology
In the initial process principle:
The surface of the concrete is evenly laid with special mineral aggregate by pressing it into a whole, so as to obtain a thickness of about 2㎜ and has good wear-resisting, dustproof and beautiful performance of the color wear-resisting ground.
Process flow and operation points:
(1) Compaction foundation → formwork setting → pouring concrete → surface leveling → spreading materials → disk work → mechanical work → mechanical plate work → surface polishing work → ground curing → shrinkage seam cutting
(2) Concrete floor construction:
(1) Requirements for concrete: 1) Strength of C25 or more. 2) Water cement ratio shall not be higher than 0.5. 3) Determine concrete aggregate particle size according to the thickness of the ground, and the maximum aggregate particle size is less than 1/4 of the thickness of the concrete ground. 4) The slump of concrete mixed on site should be controlled at 3 ~ 4cm, and the collapse of pumped concrete should be controlled at 18 soil 2cm.
(2), concrete pouring 1), pumping concrete pouring should be divided according to the sequence, otherwise it will be unable to operate the machine for large-scale construction due to the imbalance of concrete condensation. 2) The concrete floor with colorful wear-resistant materials shall be poured to the design elevation in one time. Where concrete is poured, if waterproof film is not laid, water should be sprayed to make the base in a wet state. 3) For the concrete floor constructed on the concrete floor, the thickness of the reserved pouring layer of the surface concrete shall not be less than 50mm. 4) for the second casting, the ground should be chiseled first, and dust and sundries should be completely removed. Sprinkle water to keep the base in a wet state, so that the post-pouring layer and the first pouring concrete layer are very cohesive. If an adhesive is applied, such as BARAEMULS10N57, the effect is better. 5) vibrating; Use insert type vibrator and horizontal vibrator vibration operation, special attention should be paid to the corners must be vibrating. In the process of concrete vibration, the level meter is used to detect the level of the template at any time and adjust the deviation part. 6) Ground level: use diameter 200m. Steel long roll filled with sand (steel roll width is more than 500 mm between expansion joints), repeatedly rolling the ground, make the ground level. When rolling the ground, foreign bodies on the steel die should be removed. Where steel rolling operations are not possible, the scraping bar should be used to make a floor surface. The plane elevation of the ground shall be detected and confirmed by level. The concrete floor level must be within LMM/m error. 7) to remove bleeding: after the construction of ground flatness is completed, the scraping bar of 4 meters (not less than the distance between two channel steels) should be used at least twice to scrape away excess bleeding.
(three) color wear-resistant ground surface construction is made in the concrete floor level, and after the removal of bleeding began until the surface processing is completed.
L), color wear-resistant floor material construction before and in the middle operation stage should be in the initial setting stage concrete compressive strength of 1.2N/mm2, the late operation stage should be in the initial setting stage concrete compressive strength of 1.5N/mm2, 2 to 4 hours after the initial setting stage concrete compressive strength of 1.5N/mm2 wearing kraft waterproof paper shoes. 2), color wear-resistant ground construction must be completed by professional operation of special mechanical plate operation. Mechanical plate is divided into two kinds of mechanical plate with disc and special special wipe, based on the condensation degree of the ground surface to replace the corresponding wipe. 3), removal of floating slurry: in the initial setting period of concrete, set special care, with a light press on the surface of concrete, to reach the depth of 1-2cm, the use of mechanical plate with disc (template edge and mechanical plate construction contact does not use wood everywhere) evenly scrape off the floating slurry film on the surface of concrete. 4) spreading material: operators should wear waterproof shoes made of brown paper, and spread the specified amount of 2/3 color wear-resistant material evenly on the surface of the initial setting concrete by hand to complete the first spreading operation. After the color wear-resistant material absorbs half of the water, the mechanical plate operation of the disc is added. Then, when the wear-resistant material is hardened to the highest person without obvious traces, the second material spreading operation is carried out, and the 1/3 color wear-resistant ground material of the specified amount is scattered. 5) disk operation: after the color wear-resistant material absorbs the moisture of the concrete below as a whole, the mechanical plate operation with disk shall be carried out at least twice, and the mechanical plate operation shall be carried out in a criss-cross manner. 6), mechanical plate operation: in the future operation, depending on the hardening of concrete, at least three times to install special wipe mechanical plate operation. The speed and Angle of the mechanical plate should be adjusted according to the hardening of the concrete floor. The greater the strength of concrete, the greater the Angle of mechanical plate. Mechanical plate operation should be carried out horizontally and horizontally. 7), surface polishing operation: the final modification of color wear-resistant ground is completed by mechanical plate or manual drawing plate processing. In addition, different surface finish and anti-skid requirements can be achieved according to customer requirements. The project is usually completed 2 to 4 hours after the initial setting of concrete with a compressive strength of 1.5N/mm2.
Color wear-resistant ground maintenance:
1), color wear-resistant ground surface polishing after 5-6 hours of its surface coated with special curing agent and covered with plastic film for early maintenance, in order to prevent the rapid evaporation of water on the surface, ensure the steady growth of wear-resistant ground material strength. The ground curing period is generally 7 days.
Expansion joint cutting:
The expansion joint cutting operation can be carried out when the strength of the color wear-resistant ground on the concrete reaches 30% of the standard strength value of the designed concrete. The width of the slit is 5 mm, and the depth is not less than 10 cm. Type A cold sealing paste is poured into the slit.
Color wear-resistant ground repair method:
If the wear-resistant ground is damaged after construction or equipment installation, it can be repaired by the following methods: 1), 12 mm repair. Get caught in the rain. Repair of minor damage and other places) materials: color wear-resistant ground aggregate, ethylene - vinyl acetate copolymer latex construction method: clean the repair surface. Water and ethylene - vinyl acetate copolymer latex in 2:1 ratio, and it as a base coating on the construction surface. Use 5 target quasi screen screen in addition to color wear-resistant ground aggregate, and then water and ethylene - vinyl acetate copolymer latex according to the 5:1 ratio, and add it to the color wear-resistant ground material without aggregate, mix and stir to make slurry, and then use metal wiper to repair the material in the construction surface. If there is a curing agent, it can be finished with a small brush after its surface is hardened. 2) Repair the deep place with an area of more than 10mm and greater than L ㎡. Material: color wear-resistant ground aggregate. Construction method: to repair the construction surface chisel l cm deep thickness, into the diameter of 6 mm spacing 200 mm steel mesh, pouring fine stone concrete. When the concrete is not hardened, the color wear-resisting ground material is scattered and the surface is processed with metal spatting until it is finished. If there is a curing agent, it can be finished with a small brush after its surface is hardened. (Because there will be traces at the repair place, so from the aesthetic consideration, the repair part can be neatly cut first, and then repair. Even this leaves traces, so it is best to reinforce the finished product after it is finished on the ground)
Main materials:
1, color wear-resistant ground base concrete required materials should be strictly controlled, cement must be ordinary Portland cement, its strength grade should not be less than P.0 32.5; Sand and stone should be clean without impurities. Sand is medium sand or coarse sand, gravel particle size should be controlled within 10 ~ 31.5㎜. 2, color wear-resistant ground surface material is special mineral aggregate, composed of two components: one is hard wear-resistant quartz sand aggregate after special processing, with a certain grade. The other is a special cement with water-reducing agent, diffusion agent and strengthening agent, which has the following properties: l) surface strength is greater than 68MPa. 2) Wear resistance is 4 times of ordinary concrete. 3) Mo hardness is greater than 7. 3. Type A cold sealing paste is used for perfusion of the ground expansion joint.
