Construction scheme of integral wear-resistant and dustproof floor?

What are the specific contents of the overall wear-resistant and dustproof floor construction plan? The following Zhong Da consults the bidding teacher to answer your questions for your reference.

Wear-resistant material is ground hardener, which consists of nonmetallic mineral aggregate, metallic mineral aggregate and special additives. Wear-resistant floor has the advantages of high surface hardness, high density, wear resistance, no dust, no easy peeling, economy and wide application range. Integral wear-resistant ground abandons the traditional practice of separate construction of concrete base course and surface course, thus eliminating common quality defects such as cracks and hollowing caused by poor combination of base course and surface course, simplifying working procedures, shortening construction period and saving labor costs, and has been widely used in factories, warehouses, runways, docks and other projects.

First, wear-resistant materials Hardener materials are divided into aggregate and cement. Aggregate is sandy, with an average particle size of 65438±0.5mm, accounting for about 60% of the total; Cement is treated high-grade cement. Besides the natural color of cement, there are many colors to choose from, such as red, yellow, green and gray.

The aggregate component of the hardener is natural ore. This is a non-rusty nonmetallic aggregate with a hardness greater than 8 Mohs hardness. Except for natural mineral aggregate, the weight of other cement and pigments shall not exceed 25% of the total weight. The dosage of wear-resistant materials should be determined according to the material specifications and design requirements.

Second, the construction machines and tools in addition to the use of conventional machines and tools of concrete floors, the other to prepare the following machines and tools.

(1) deflation tool: rubber tube or vacuum water absorption equipment.

(2) Mortar leveling tool: Ф150 steel pipe, filled with sand in the middle, more than 500mm wider than the width of the formwork, with rotatable pull rings at both ends.

(3) Calender: Made in Canada, the chassis is made of four-leaf steel plate. By adjusting the angle of the steel plate, the surface layer can be calendered (the angle is small for softer surface layer and large for harder surface layer).

(4) Flat rubber shoes: used after initial setting of concrete; Waterproof paper shoes or paper bags; The surface blade is used for calendering.

3. On the basis of 500m2/d, the construction organization shall be equipped with the following construction personnel in addition to the normal ground concrete pouring personnel: 3 concrete leveling personnel, 2 wear-resistant material transportation personnel, 3 wear-resistant material paving personnel, 3 spatula construction personnel and 3 spatula leveling personnel. According to the above standards, continuous construction, 6 ~ 7 polishing machines and corresponding personnel can complete 2000m2/d. 。

Four. Construction preparation (1) The sand and gravel cushion under the terrace shall be compacted by a roller.

(2) Set up formwork (steel formwork or channel steel) according to the design elevation, detect the formwork elevation at any time with a level, and adjust the deviation with a wedge.

(3) According to the specification requirements, the warehouse and frame joints shall be carried out according to the vertical and horizontal axes.

(4) The maximum particle size of crushed stone used in concrete should be ≤30mm, and the water cement ratio and slump should be as small as possible.

(5) The concrete grade is no less than 25, and the site slump is between 75-100 mm..

Verb (abbreviation of verb) process flow The process flow is shown in the figure.

(It is suggested to apply a layer of mortar bonding layer before leveling layer construction, so as to ensure the common quality defects such as cracks and hollowing caused by poor combination between base and surface. )

6. Operating point 6. 1 Finishing lofting According to the building structure benchmark chalk line (such as wall surface +50cm line), use a level to determine the concrete pouring thickness in the floor slab pouring area, set the horizontal elevation mark, and carefully review it, and control the maximum concave-convex deviation within 3-5 mm. ..

6.2 Concrete pouring (1) Sprinkle water before concrete pouring to keep the foundation moist. In order to reduce bleeding, the water cement ratio and slump should be controlled, and commercial concrete should be discharged by chute with manual discharge instead of pumping.

(2) As far as possible, the concrete shall be poured to the elevation at one time, and the part that does not reach the elevation shall be filled with concrete and vibrated. Mortar repair is strictly prohibited. Vibrate with a flat vibrator, repeatedly crush with a special steel roller, and pat the columns, corners and other parts with a wooden paddle. After the concrete is leveled, the cement slurry rises to the surface at least 3 mm thick.

(3) After concrete pouring, use rubber hose or vacuum equipment to remove bleeding, repeat it for more than two times, and then start the construction of wear-resistant materials. Before the construction of wear-resistant materials, the construction personnel should wear flat-bottomed rubber shoes in the middle of the operation and waterproof paper shoes in the later stage of the operation.

6.3 The time (1) for the first paving and calendering of wear-resistant materials varies with climate, temperature, concrete mixture ratio and other factors. Premature paving will make wear-resistant materials sink into concrete and lose their function; If the concrete is laid too late, it will solidify and lose its cohesive force, so that the wear-resistant materials cannot be combined with it, resulting in peeling. The method to judge the paving time of wear-resistant materials is to step on it, and the first paving construction can be started when it sinks about 5 mm.

(2) The moisture on the edges of walls, columns, doors, templates, etc. disappears quickly, so the paving construction should be given priority to prevent the effect from being reduced due to water loss.

(3) The amount of paving for the first time is 2/3 of the total amount, and the mixture should fall evenly, and it can't be thrown away by force. After paving, smooth it with a wooden trowel. After absorbing a certain amount of water, wear-resistant materials are ground and dispersed with a trowel and combined with foundation concrete slurry.

6.4 When the wear-resistant material is laid for the second time and leveled for the second time (1), first measure the levelness with a ruler or a ruler, and adjust the unevenness of the first time. The paving direction for the second time should be perpendicular to the first time.

(2) The second spreading amount is 1/3 of the total amount, immediately after spreading, leveling and polishing are carried out, and the calendering operation is repeated at least twice. Calendering operation should be criss-crossed, even and orderly, to prevent material aggregation. The corner was treated with a wooden trowel.

(3) When the surface material hardens until the finger pressure sinks slightly, the speed and angle of the calender should be adjusted according to the hardening condition, and the calender should be staggered for more than three times.

(4) The flatness of wear-resistant ground shall be 2m square, with a maximum deviation of 3-5mm, and the maximum deviation between the highest point and the lowest point of the same elevation shall be no more than 20mm. Try to avoid cracking, peeling or sanding.

6.5 Surface modification and maintenance (1) There are scratches on the back of the calender, which is messy. In order to eliminate scratches, finally, the surface is manually polished in the same direction with a thin steel trowel to complete the modification process.

(2) After 5-6 hours of wear-resistant ground construction, spray 0.2 L /m2 curing agent or cover it with plastic film to prevent cracking.

(3) Wear-resistant floor surface can be removed after 24 hours of construction, but care should be taken not to damage the floor edge.

(4) After 5-7 days of completion, kerf shall be carried out to prevent irregular cracks, and kerf shall be 6-8m (generally determined according to workshop column spacing). The cutting lines should be unified, and the cutting seams should be neat and straight. The cutting depth should be at least 1/5 of the floor thickness (it is recommended that the cutting seams be completed by civil engineering). The caulking material should be preformed or cut elastic resin, and sealant is recommended.

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