How to deal with the warehouse floor, new warehouses and old warehouses to transform the ground treatment

Currently, the logistics warehousing center of the ground is basically based on ordinary cement concrete ground, some of the better conditions of the warehouse area using terrazzo or floor tiles, after years of use proved that these floors are different problems.

Ordinary cement concrete floor is generally used above C20 strength, 15 ~ 20cm thick plain concrete direct light to do the surface layer, or in the concrete bedding layer and then do 3 ~ 5cm thick, C30 strength of cement mortar cover layer. This form of ground is the cheapest form of ground, but not the most economical form of ground, generally after two years of use, the role of forklifts in the ground will appear in different degrees of sand, dust phenomenon. With the extension of the use of years, coupled with carbonation, water erosion and weathering, the surface of the ground will continue to chalk, affecting the normal use. Specifically manifested in the stacking of goods regardless of the length of time, the top is always covered with dust.

Terrazzo floor and floor tile floor, according to the choice of different materials, the general cost per square meter than the ordinary concrete floor about 30-60 yuan. These two forms of ground in the use of the function of the basic solution to the concrete floor sand dust problem, but the surface layer itself and the concrete base layer is stripped, so in the role of heavy vehicles, it is very easy to cause terrazzo or floor tiles surface layer shelling, hollowing, cracking, peeling phenomenon, not only affects the depot area of neat, smooth, and with the use of the damage area will be more and more large, the service life is also very short.

Second, the new ground

For the logistics storage center ground requirements, in fact, the most critical solution is to resist the forklift and wheel friction, while trying to improve the ground decorative, durable, beautiful effect. In order to adapt to these requirements, now introduces three kinds of warehouse floor treatment method, for communication and reference.

According to the logistics warehousing center of the new construction or renovation projects, can be used in different forms of ground. For the new logistics warehousing center, should consider the use of economic and practical wear-resistant floor; for the transformation of the logistics warehousing center, in considering the use of wear-resistant floor at the same time, you can consider the original ground on the basis of epoxy coating floor and cement floor hardener for processing.

(A) wear-resistant floor

Wear-resistant floor is the best choice for the new logistics warehousing center warehouse and station floor, is the most durable and economical of all ground forms of a ground program. Choose wear-resistant flooring, not only completely solve the problem of the ground sand dust, service life can reach more than 20 ~ 30 years, and ground construction speed, short cycle, and concrete paving construction synchronization and end, the ground can also withstand heavy loads after the completion of the vehicle crushing.

Wear-resistant flooring is in the newly poured concrete and paved surface, evenly spread a layer of wear-resistant flooring materials, the use of professional smoothing machine for slurry and lightening operations, the use of grass-roots concrete slurry wear-resistant materials after wetting with the grass-roots concrete to form an integral whole, and the formation of a non-slip wear-resistant surface layer on the surface, significantly improving the surface strength of the concrete to enhance the abrasion-resistant performance, maximize the solution to the warehouse floor, the ground is not only a good solution to the problem, but also a good solution to the problem. Maximum solution to the warehouse floor sand, dust problems. Wear-resistant flooring material is made of a mixture of different selected (quartz sand, emery, metal, alloy) aggregates, special cement, polymer additives, pigments and other uniform. Wear-resistant flooring can be made into natural color, gray, red, yellow, green and so on.

1. Construction preparation

Level control according to the design elevation, support the template or play a good level of control points, do a good job of steel leaving holes and pipe fittings buried in the work, according to the normal concrete paving method for normal paving, to ensure that the concrete paving compactness and smoothness. Concrete grade should be more than C20, while minimizing the amount of fly ash, paving thickness should be more than 10cm, slump should be between 8-11cm, if the pumping concrete should not be more than the maximum 18cm. concrete paving area per day must be coordinated with the wear-resistant floor construction personnel and equipment configuration, the daily workload should be basically equal. Concrete paving dense, and then use the big bar leveling once, so that the flatness control within ± 5mm, and then handed over to the wear-resistant flooring construction team to start construction.

2. Construction steps

①First spreading: when the concrete is just beginning to solidify, i.e., after stepping on it, only the soles of the shoes can be sunk, the wear-resistant flooring material will be uniformly spread on the surface of the concrete in accordance with the dosage of 3 kilograms per square meter.

② the first slurry: to be spread wear-resistant flooring material to absorb the moisture of the concrete grass-roots level after all the shade of wet, the use of a special mechanical trowel set of metal disk in the concrete surface slurry operations. Slurry in accordance with the first horizontal after vertical vertical cross twice to ensure the uniformity of the slurry, while ensuring the uniformity of the color.

③Surface leveling again: the use of aluminum alloy 3mm scraper bar, in the surface of the floor transverse and longitudinal leveling twice.

④The second spreading: to be after the concrete reaches a certain hardness, use the fingers to press down hard on the concrete, the concrete slumps 1 ~ 2mm or so, and then the wear-resistant flooring materials in accordance with the dosage of 2 kilograms per square meter, evenly spread on the surface of the concrete.

⑤ The second slurry: to be the second spread of wear-resistant flooring material to absorb the water of the concrete grass-roots level after all the shade wet, and then use a special mechanical trowel set of metal original disk in the concrete surface slurry operations. Slurry still in accordance with the first horizontal after vertical vertical cross twice, to ensure the uniformity of the color and surface flatness. The angle of the mechanical trowel should be adjusted according to the hardening of the concrete.

6 lightening operation: according to the hardening of the floor, when there is no obvious change when pressing the floor hard by hand, take off the metal disc of the mechanical trowel, and use the spatula to lighten the surface directly, and lighten the surface in accordance with the way of first slow and then fast, and first horizontal and then vertical. Finally, use hand trowel to find slurry to repair the place of local exposed sand eyes.

7 wax water maintenance: 5 hours after the completion of the floor polishing, should be used to close the concrete maintenance wax water maintenance, or plastic film sprinkler maintenance. Maintenance period of 72 hours prohibited on people stepping on, 7 days should not have heavy traffic.

8 expansion joints: according to the concrete grass-roots design requirements of the reinforcement, in the floor finishing within 72 hours after the completion of the cutting of expansion joints. If the floor for the cutting process, it is recommended that the expansion joints first foam strip caulking, and then use the special road embedded seam adhesive grouting, to prevent dirt filling the gap.

3. Waxing protection

In order to improve the wear-resistant flooring of the degree of aesthetics, wear-resistant flooring can be waxed, so that the surface of the flooring to form a layer of colorless transparent wax film. Wax film can be closed to the surface of the floor of the microscopic holes, isolation of moisture, stains, dust on the floor of the infiltration and pollution; at the same time more conducive to preventing the floor of the chalking and dust. Using closed waxing method can be completed within a few hours on the floor care, in the non-slip requirements to ensure that forklifts, transport trucks, normal operation, the use of the process of wax surface itself does not adhere to the dust, the entire closed area is easy to clean up. Waxing protection can be carried out according to the following construction steps:

① In the wear-resistant flooring construction and equipment installation is completed, the warehouse before the official use, first of all, with a special floor cleaning machine with a high-pressure water gun and wet and dry vacuum cleaner, professional ground cleaning, to remove the warehouse construction and renovation process caused by the ground dirt, and dry the ground.

② Use a clean wax mop to evenly coat the surface of the floor two times with super sealing wax, and dry to dry.

③ Use clean wax mop to evenly coat the surface of the floor with two coats of Bright Membrane High Strength Wax, and leave it to dry.

④ Wait for the two bottom and two surface wax coating construction is completed after 8 hours, you can carry out forklift operations on the floor surface.

(II) Epoxy coating floor

Epoxy coating floor surface material using two-component, solvent-containing color epoxy coating, is a kind of epoxy flooring, with good durability, chemical resistance, dustproof, easy maintenance, bright color, etc., suitable for the transformation of the old warehouse floor, more suitable for chemical corrosion-resistant requirements of the storage area of the floor, acid, alkali and other chemical corrosion requirements, able to withstand the forklift truck and Forklift and wheelbarrow crushing effect. The color of epoxy coating floor is relatively rich, and it can be adjusted arbitrarily by computer. Epoxy coating floor is generally composed of three parts: primer, middle coating and top coating. Epoxy primer is easy to penetrate into the concrete surface, has excellent adhesion, can seal the concrete surface, play the role of solid substrate. Epoxy medium coating contains appropriate amount of solvent and sand powder, mainly play a closed concrete surface sand and local leveling effect. Epoxy top coating has excellent durability and good chemical resistance and abrasion resistance. For general ordinary concrete floor, the whole epoxy coating floor thickness of 0.4-0.6mm, for the surface conditions of the poorer old concrete surface layer, can reach a thickness of 1mm.

Concrete grass-roots level

1. Construction program

① For newly completed concrete floor, if there is alkali return phenomenon, it should be supplemented with acid treatment;

② For the old concrete floor, it should be used with special ground grinder or sand blaster to grind off the floating slurry or loose layer existed on the broken or loose concrete floor, and then cleaned up;

③ Using two-component epoxy primer/sealer, with a board brush or wool brush in the concrete floor surface evenly coated twice, leave to dry for 12 hours;

④ Using the epoxy coating with quartz sand, with a batch knife on the surface of the primer for two batch of coating, the concrete floor surface of the sand holes and pits and grooves sealing and replenishment, every batch of coating once to be dry, with a special grinder to sand the surface, dry time about 12 hours;

③ Using two-component epoxy primer/sealer, using a special grinder to sand the surface. The drying time of the middle coating is about 12 hours;

⑤ Use epoxy resin surface coating material, use airless spray equipment, spray a layer of dry epoxy evenly on the surface of the middle coating, you can also use the wool brush or board brush in the middle of the coating on the brush twice, to be completely cured in 7 days can be used normally.

2. Precautions

①construction should be tested before the concrete substrate moisture content should be less than 8%, the humidity of the ambient air should be less than 85%, the ambient temperature should be higher than 5 ℃.

② Concrete grass-roots level below as much as possible with a waterproof layer, at least the concrete grass-roots surface is not required to return to moisture.

③ The newly completed concrete floor should be maintained for 28 days before the construction of epoxy coating floor, before construction to ensure that the ground is not polluted.

(C) wear-resistant hardener

The use of wear-resistant hardener directly on the surface of the concrete floor layer is the cheapest ground care program. Ground wear-resistant hardener is a polymer, containing a unique network of crosslinking resin, transparent and colorless, with super penetration, can penetrate into the concrete interior 3mm, inside and on the surface of the concrete to form a strong and long-lasting protective film, which can effectively prevent chalking of the ground to extend the service life of the ground. Wear-resistant hardener can be used alone on the concrete surface, but also in the wear-resistant floor surface supporting the use of better results.

1.construction program

① clean the floor, and with a special floor cleaning machine for the initial cleaning;

② with diluted detergent for deep cleaning, and then cleaned twice with water;

③ with a scraper to collect and use a suction machine to suck away the ground residual water;

④ clean the ground, the ground will dry (depending on the different). After cleaning the ground cleanly, let the ground dry (depending on different construction conditions about 10-24 hours), the local over-wet surface can be used to bake with a heater;

⑤ With a clean roller, evenly coated with a layer of ground wear-resistant enhancement agent on the surface of the floor, to be dry after repeating the above steps coated with a second layer, generally 2 hours will be dry, the specific length of time with the ventilation, humidity and temperature of the air;

⑥ The ground will be dry, the specific length of time with the ventilation, humidity and temperature;

⑥ The ground will be dry. /p>

6 floor wear-resistant enhancer construction is completed, should be given 24 hours of curing time, and then use.

2. Precautions

Floor wear-resistant enhancer should be constructed in a temperature environment above 5℃, and the construction should be closed around to avoid dust adhesion.