The traditional diamond floors will inevitably cause pollution when they are operated by equipment installation and other kinds of cross operation, which will accelerate the deterioration rate of the diamond floors, resulting in erosion, peeling, stagnant water and other defects, which are difficult to meet customer requirements. Below the author introduces an innovative diamond floor anti-pollution and anti-damage construction method, for the reference of relevant engineers. 1.工程概况
1. project overview
Owners require the production plant to control the floor according to the pollution of the clean room for food production, so the core of this project construction is to solve the problem that the large area of the floor of the food plant meets the requirements of the clean workshop.
2. selection of construction technology for several kinds of emery floor
2.1 two light harvesting process
The construction method of the combination of the second seeding emery, the compaction and grinding of the disc machine, the calendering of the hard knife of the calender before and after the initial setting, and the light before and after the final setting, the sealing and curing agent and the curing agent is adopted. It has the advantages of non hydrophilic and smooth external. However, the construction operation is complicated and requires the cooperation of professional and technical personnel, skilled workers and maintenance and sealing costs.
2.2 one time polishing process
Adopting the construction method of one-time spreading emery, compacting and grinding of disc machine, pressing and polishing the hard knife before and after the first setting to the final setting, polishing and sealing and curing the hard knife before and after the final setting, it has the advantages of non-hydrophilic, smooth and solid exterior, but it needs skilled workers to operate and to take the new concrete surface one-time spreading. New measures, maintenance sealing technology is difficult, labor costs.
2.3 two times glazing process
The construction method of combination of polishing sealing and curing is adopted, which consists of twice spreading emery, compacting and grinding of disc machine, pressing and polishing of hard knife of calendering machine before and after initial solidification to final solidification, and polishing and sealing of hard knife of calendering machine before and after final solidification. Similarly, it has the advantages of non-hydrophilic, smooth and solid exterior, but the maintenance and sealing technology is difficult and labor costs are high.
By comparing and analyzing the different processes of diamond floor, it can be seen that the secondary lighting process has the advantages of high cost, difficult construction and unsuitable for super large area construction. Secondary polishing diamond floor has more advantages in construction operation and price, so we choose this scheme as the best one.
3. specific construction strategy
3. The requirements for compressive strength and wear resistance of diamond faced floor structures are improved.
3.1.1 determines the key points of concrete construction with high performance superplasticizer only. Through centralized discussion, three key construction control factors which have a significant impact on the quality of floor structure are defined. First, the key to ensure the compactness of floor structure concrete is whether the concrete transportation time, together with the whole time of pouring and technical intermission, does not exceed the initial setting time of concrete. The two is the slump of concrete, which is of great significance to the spreading and transportation of large area concrete. The three is the final process of concrete pouring - vibration, which is the key to determine the quality of the floor structure.
3.1.2 Relevant engineers consult a large number of similar projects concrete transport time parameters, combined with the actual project, through on-the-spot measurement and calculation, preliminary determined three concrete transport time parameters.
3.1.3 Through the field pouring test, it is found that there are few concrete mixing stations to choose for one hour transportation time, and there is no quality advantage. The daily pouring amount of concrete for two hours transportation time is greatly limited, which is not conducive to the construction of super large area. When the transportation time is 1.5 hours, most of them can be selected to the mixing station with good quality to form a stable concrete quality, and 20 workers are the most efficient. So select 1.5 hours and 20 person parameters.
3.1.4 The slump parameter of concrete is an important parameter that can satisfy the compactness of vibrating compaction in the continuous moving range of super-large area floor pouring. It is necessary to determine the slump parameter of concrete preliminarily.
The slump parameter of 3.1.5 concrete is an important parameter that can satisfy the compactness of vibrating tamping in the continuous moving range of super-large area floor. The slump of outlet is 10-12 cm, the slope of spreading is about 30 degrees and the moving range is about 2 m. Through comprehensive analysis of field test results, the second scheme of slump of loading hopper is 17-18 cm. Parameters are adopted for insulation and cooling of concrete pumping pipes.
After pouring according to the final selected parameters of concrete transportation time, the results show that: the concrete poured in 1.5 hours of concrete transportation time, all the paving vibration, the superintendent just has footprints, to reach the initial setting.
3.2 erection of reinforced concrete floor structures
In order to find gluten for a multifaceted diamond funnel, the base settlement difference is within 1.5. The steel bar of the diamond structure is a "multi point diamond funnel shaped slope".
3.2.1 In order to ensure that the protective layer is consistent, the diameters of the open horse stool and the straight round steel horse stool installed at each node must be checked.
3.2.2 By experientially calculating the plane elevation and coordinate position of the fixed gluten of the spot welded circular steel which meets the requirement, the gluten accurately positioned by several round steel horse stools forms a multi-faceted diamond-shaped funnel, which is marked on the round steel horse stool.
The 3.2.3 operator can accurately install the guide rail in a predetermined position.
3.2.4 After the installation of the guideway is completed, the results are measured, checked, corrected and strengthened, and the dynamic measurement is checked during the use to ensure that the accuracy of the guideway meets the requirements.
3.3 meet slope requirements and large area construction after flatness control.
In order to make the surface of the floor smooth and firm, the multi-point funnel-shaped slope search on the drilling face is 0.5%; the flatness of the floor is controlled within 2 m ruler (+2), "the multi-point diamond funnel slope search on the ground surface" is used to meet the slope requirements and carry out large-area construction after the flatness control.
3.3.1 In order to ensure the stability of the construction quality of the super large area diamond floor, a multi-point diamond funnel-shaped construction method is adopted for the slope finding of the production plant to ensure the correct slope direction of the floor and the plane elevation control guide rail can be installed in a straight line and the process flow is formulated to guide the site operation.
3.3.3 The funnel tip with a radius of 250 mm in the center of the floor drain is enclosed by a square box made of wood and then poured. The outer edge of the floor drain is 20 mm lower than the edge of the square box, and the hole plugging and other protections are well done.
3.3.4 In order to ensure the formation of multi-faceted diamond funnel, a 16 steel straight horse-stool is arranged under the gluten joint of the floor structure, and the top surface of the gluten is 35mm below the joint elevation, so as to ensure the unification of the protective layer.
3.3.5 Install the guide rail according to the pulling line of the node. The surveyor uses the laser scanner to dynamically measure the control elevation of the guide rail, and then pours the structural concrete evenly. When the cushion concrete is slightly watered and has the initial setting strength, start the plastering machine to grind and grout slowly. Then the scraper is leveled with the ruler bar to make the concrete slurry surface smooth and even.
3.3.6 when the concrete is initially condensed to 50% dry, the first batch of material is dispersed. Firstly, sprinkle 2/3 of the prescribed amount of diamond on the concrete surface, then compact and rub with a disc polisher. After a period of time, spread the remaining 1/3 of the diamond according to the sample. Spread the direction perpendicular to the first direction, immediately wipe and calender, and repeat the calender operation at least twice. When the trolling machine is operated, it should be crisscross and interlaced in order to prevent material aggregation. The edges and corners are manually treated with wood and iron trowel. The allowable deviation of floor surface evenness is guaranteed to be within 2 2m of allowable deviation. Effect checking: Through the above measures, the gradient of multi-faceted diamond funnel-shaped slope searching is ensured, and a 35 mm thick protective layer is reserved on the top of gluten of floor structure, which makes the combination of diamond surface layer and structure more firmly. The control elevation of multi-faceted diamond is effectively ensured by dynamically measuring the guide rail with laser leveler. Molding.
4. construction summary
4.1 professional and technical aspects
The construction of diamond floor and its equipment installation and secondary decoration on the floor have been comprehensively understood, and the technical level has also been greatly improved, mainly as follows:
4.1.1 has mastered the construction process and control points of the diamond flooring.
Through this implementation, in the future construction of similar projects, in order to prevent the combination of diamond surface layer and structure, and then affect the construction quality of diamond floor, it should be noted that the thickness of reinforcement surface protective layer of floor structure should not be greater than 35mm. The reinforcement gluten of diamond floor structure is diamond funnel-shaped, which is beneficial to the uniformity of the protective layer and ensures that the deviation of the protective layer is within the allowable range of the code.
Innovation points in the construction of 4.1.2 diamond faced floor
(1) separate warehouse construction. Cold cracks are easy to occur in super large area pouring concrete. In the implementation of this activity, aiming at this problem, the warehouses are divided according to the width of 12m on the construction plane. Through actual construction inspection, the effect is in line with the quality requirements.
(2) arrange the concrete pouring sequence rationally: (one way pouring, each width 4~6 meters). It provides a scientific process for concrete placement and ensures the construction progress and construction quality.
(3) install temporary guide rail. It provides a strong support for the leveling of the emery surface, and ensures that the slope direction of the surface is correct and the surface smoothness meets the design requirements.
4.2 management technology
Team members can carry out QC activities according to the PDCA program, and can speak with objective data, the correct use of QC tools, a good solution to the construction quality problems.
The construction situation of the construction project is complex and changeable, which requires the construction personnel to explore, improve, innovate and tamp constantly. In the construction process, the construction personnel should be conscientious and responsible, compared with a variety of construction schemes, in order to select the best strategy to save costs and ensure the quality of the project. Build a high-quality, high-level project, thus bringing economic benefits to the enterprise, while returning to society and serving the community.
标签:   环氧地坪 地坪 环氧地坪漆 环氧地坪施工 金刚砂地坪