Grass-roots acceptance. Ground-level construction to be subject to supervision and acceptance acceptance, flatness, compaction degree to meet the design and specification requirements, the surface without water, scum, etc., sufficient surface layer thickness and construction work conditions.
According to the requirements of the design drawings, release the outside line of the pre-cast floor and the installation location of the template, according to the pouring line, a reasonable division of the construction section to design sub-seam shall prevail.Double Steel Roller - Road Machinery Equipment Manufacturers - Doan Machinery
The installation of the template (tool channel). As the thickness of the concrete floor is generally thick, so the use of tool channel when the template, according to the location of the pay-off installed in the grassroots, using iron drill into the base to fix the channel position, For the 2500 ~ 3000mm, steel mold release agent inside coating. 5.2.5 Concrete mixing, transportation, paving
At present, the general amount of ground concrete pouring generally use purchased goods concrete to solve, if the site conditions, can also be located on-site centralized concrete mixing station. Site with compulsory concrete mixer spices, small dump truck delivery site. Mixing should be based on the construction mix feed, and stir the mixture evenly. Discharge and pavement discharge height must be controlled within 1.5 meters, so as to avoid the segregation of concrete, if segregation should be re-stirred.
The paving of concrete is done by longitudinal slitting method, and the width of the longitudinal strip is the same as the width of the slit. When the concrete mixture into the mold, the discharge should be concentrated, slow, thick thick template about 2cm higher, if necessary, to reduce material or feeding work, vertical and horizontal section to meet the requirements.
The vibration of the plate vibrator compact. Near the edge of the concrete plate should be inserted with the first vibration rod vibrator, to push the slow pull out by row or into the order of the order, the moving distance is not Should be greater than its role in the radius of 1.5 times, to avoid the collision template. And then use the plate vibrator fully vibrated from the board to the board in the slow forward, after the board quickly moved to the board edge, and then move slowly to the board, according to the order of advance. Each need to overlap 1/3 or 10 ~ 20cm, and then a row by row from the side to the center of the vibration.
Vibrator vibrator at each location the duration of the mixing material should stop sinking no longer take bubbles and gush cement mortar shall prevail, should not be too vibration. Vibration should be supplemented by artificial leveling, and at any time check the template, if loose, deformation, subsidence should be promptly corrected. Vibrating beams with vibration
After vibrating and roughly flattening, the vibrating plate (vibrating beam) is scraped back and forth for 2 to 3 times, so that the surface of the pan is leveled off the bubble, the advancing speed is 1.2 ~ 1.5m / min. With the shovel personnel see the injustice should be timely excavation fill. When filled with gravel to fine concrete mixing material, is strictly prohibited to fill with pure mortar leveling. Vibration ram plate (vibrating beam) after leveling, and then further back to pull the pulp cylinder to mention slurry leveling. Always flatten the underside of vibrating beam when leveling.
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With the large-scale, large-span industrial plants and large-scale public buildings, a large number of municipal facilities, the surface pressure-type large area of concrete construction quality is also increasing attention. The use of simple hand tools manual light collection technology has been unable to meet such ground construction requirements, and now the construction side has been widely used in electric, mechanized mode of operation. Mechanical ground calendering refers to the use of special electrical machinery for large-scale calendar light concrete floor smoothing light construction, the relative artificial light in terms of its work efficiency is significantly improved, the construction quality is more easily guaranteed, it is now getting more and more Widely used.Double Steel Roller - Road Machinery Equipment Manufacturers - Doan Machinery
Process characteristics
Changed the previous practice in the concrete surface of the secondary construction of the practice to ensure that pouring, wiping a one-time molding, to eliminate hollowing, to save the leveling layer of the material, is conducive to saving construction costs.
Construction mechanization of a higher degree of ground construction quality easy to control, ground mechanical smoothness is good, more than manual light quality, basically put an end to the phenomenon of sand from the ground, wear resistance greatly improved.
Scope of application
Apply to the factory floor, basement or garage ground, the city square ground, sports venues and other surfaces to be cemented concrete floor.
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Material Standard Test
Raw material test items include: Water content: with drying, moisture content determination of rapid determination of alcohol or alcohol. Raw material particle analysis: Determination of grading with the screening method to meet the requirements. Organic and sulphate content: suspected soil for determining whether soil is suitable for lime or cement stabilization. Effective Calcium and Magnesium Content: Determine the quality of lime by titration or calcium electrode method. Cement grade and final setting time: determine the quality of cement, is suitable for application.loss of ignition: to determine whether the application of fly ash Construction quality control The main items of control include water content, binder dosage, unconfined saturated compressive strength, mixing uniformity, compaction degree and deflection value.Double Steel Roller - Road Machinery Equipment Manufacturers - Doan Machinery
In order to accurately grasp the strength of the test section, seven days after the completion of construction sprinkler water conservation, the use of core drilling rig in the test section directly on the indoor drilling specimens without lateral compressive strength testing, core number per 50m Core three. In order to have a representative, generally located in the left and right different positions.
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