Cast-in-place concrete floor one-time forming construction method

Abstract

The invention discloses a one-time forming construction method for a cast-in-place concrete floor. The one-time forming construction method comprises the following steps that S1, materials are prepared; s2, cushion layer treatment; s3, a formwork is installed; s4, setting an isolation seam; s5, concrete pouring; s6, concrete leveling treatment is carried out; s7, concrete maintenance; and S8, floor construction. According to the one-time forming construction method for the cast-in-place concrete floor, the levelness and flatness of the ground can be effectively improved, the overall service life of the floor is prolonged, meanwhile, a special polishing technology is used, a unique concrete reinforcing material is applied, the high-density, high-strength, super-resistant and high-gloss floor is formed inside and on the surface of concrete, and the construction efficiency is improved. The method can effectively avoid later ground maintenance and cost, increase the attractiveness of the ground, prolong the service life of the ground, effectively ensure the flatness, strength and durability of the terrace, and reduce the quality problems of poor interlayer combination and the like possibly caused by layered construction at the same time.

Description

Technical Field

[0001] The invention relates to the field of floor construction, and in particular to a one-time forming construction method for cast-in-place concrete floor. Background Art

[0002] Flooring refers to the use of specific materials and processes to construct the original ground and present a certain decorative and functional floor, such as epoxy self-leveling floor, diamond abrasive wear-resistant floor, epoxy terrazzo floor, epoxy colored sand floor, epoxy anti-static floor, epoxy anti-slip floor, polyurea anti-corrosion floor, polyurethane floor, silicon PU floor, concrete sealing and curing agent floor, etc. The floor is the part where the ground floor room is in contact with the soil layer. It bears the load of the ground floor room. It is required to have a certain strength and rigidity, and have moisture-proof, waterproof, thermal insulation and wear-resistant properties. The ground layer and the outdoor site of the building are closely related. The relationship between the floor and the platform, steps and the edge of the building should be handled well to make the handover between the building and the site clear and the overall harmony.

[0003] When carrying out floor construction, it often takes a long time, and its levelness and flatness cannot be guaranteed. Its service life is short, and it cannot be well combined with concrete. Its density, strength and gloss will be affected, making its subsequent overall maintenance and upkeep costs also high. Summary of the invention

[0004] The main purpose of the present invention is to provide a one-time forming construction method for cast-in-place concrete floor, which can effectively solve the problems in the background technology.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A one-step forming construction method for cast-in-place concrete floor, comprising the following steps:

[0007] S1: Material preparation: lithium-based liquid hardened surface layer; non-metallic aggregate wear-resistant surface layer; 200mm thick concrete;

[0008] S2: Cushion treatment: compact the cushion layer with a compaction coefficient greater than 0.95. After cleaning the cushion layer, lay a single layer of plastic film with a thickness of not less than 0.1mm and an overlap width of not less than 20cm to prevent the moisture of the concrete and the concrete slurry from penetrating into the cushion layer. Pour a 100mm thick C15 concrete cushion layer, clean it 1 day in advance, and sprinkle water to keep it moist;

[0009] S3: Install the formwork: Set construction joints with metal armored joints in the pouring area. The upper layer of the construction joints is fixed at the +0 elevation point as the upper layer of the pouring area formwork. The lower layer is fixed to the double-layer bidirectional steel bars with a wire mesh to prevent concrete leakage. After the pouring and polishing operations are completed, they are buried in the concrete. The door area is embedded and fixed with metal armored joints to strengthen the rigidity and quality of the formwork, which is consistent with the upper surface elevation. The elevator track steel formwork is used and fixed and stabilized with a fixed bracket. The upper surface elevation of the formwork is adjusted according to the designed floor elevation before and during construction;

[0010] S4: Setting isolation joints: Setting isolation joints at the column footings on the wall side of the pouring area;

[0011] S5: Concrete pouring: After mixing the lithium-based liquid hardened surface layer, the non-metallic aggregate wear-resistant surface layer with concrete, pour the concrete in order of the area, and vibrate it in place with a vibrating rod. When pouring concrete, pumping is adopted. Automobile pumps are preferred. The length of the pump pipe shall not exceed 100m. The transportation time of the concrete truck shall not exceed 20min, and the construction area per hour shall be 150m-200m. Special parts shall be transported by small dump trucks for secondary transportation. After pouring, the quality of the concrete shall be tested on site, and the slump test shall be carried out on the concrete in the unloading and pouring area. Concrete that does not meet the requirements shall be returned, and the mixing station shall be assisted in adjusting the concrete mix ratio;

[0012] S6: Concrete leveling treatment: including the following steps:

[0013] S601: Use a spreader to spread wear-resistant materials. The amount of wear-resistant materials is 5kg / ㎡ to ensure the thickness, flatness and uniformity of the materials. The wear-resistant materials are spread twice. After hardening, use a polishing machine to polish the surface;

[0014] S602: After the concrete has been finally set, the shallow footprints left by people stepping on it are taken as the standard. Then, the double-disc polisher with a circular disc is used for grinding. The grinding and slurry are carried out according to the pouring sequence. Some areas are polished with a single-disc polisher. The edges and corners are polished with a corner polisher. After grinding, the slurry is scraped and leveled in sequence with a manual leveling ruler. The areas with poor flatness are leveled again. After leveling, let it stand for a while;

[0015] S603: After the grinding operation is completed, a double-disc polishing machine with a metal blade is used for polishing. The polishing must be done more than three times. The corresponding edges and corners are polished with a single-disc polishing machine and an edge finishing machine. After the double-disc metal blade polishing is completed, a plastic blade is used for polishing;

[0016] S604: Dry cutting is used to complete the cutting work within 12 hours after the polishing work is completed, and the concrete cracks are induced in advance. The cutting depth is 7cm and the width is 3-5mm;

[0017] S7: Concrete maintenance: After cutting, lay geotextile to keep moisture, maintain constant temperature, and water for more than 15 days;

[0018] S8: Floor construction: Use a floor grinder with water to grind the floor to remove the floating slurry. When the floor surface is relatively dry, use a sprayer to apply lithium-based concrete liquid hardener, keep it moist for more than 20 minutes, use a floor grinder with a resin grinding disc to continuously grind the floor, use a vacuum cleaner to remove excess material, and then use a high-speed polishing machine with a 2000-mesh resin grinding disc to polish the floor, and finally use a sweeper to clean it up to complete the construction.

[0019] Preferably, in step S1, the amount of lithium-based liquid hardened surface layer used is 0.4kg / ㎡; the thickness of the non-metallic aggregate wear-resistant surface layer is 2mm, and the material amount is 5kg / ㎡; steel fiber is mixed in the concrete, the length of the steel fiber is 60mm, the diameter is 0.75mm, the steel fiber is bonded into a row with water-soluble glue, and the two ends are hooked, the tensile strength of the steel fiber is greater than 1100MPa, and the concrete dosage is 23kg / ㎡. The concrete is premixed commercial concrete, the water-cement ratio is less than 0.5, the maximum particle size of the coarse aggregate is not more than 25mm, the slump is 120mm±10m, and the concrete does not contain fly ash.

[0020] Preferably, in step S2, during construction, the construction is carried out in increments of 6 m, and the floor is poured in strips and blocks, with molds made on both sides.

[0021] Preferably, in step S3, the elevation point error cannot exceed ±1mm / 3m.

[0022] Preferably, in step S4, for the deformation joint area, before pouring concrete, positions for installing the bearing deformation joints are reserved along both sides of the intersection, and after the concrete floor is cured, the aluminum alloy bearing deformation joints are installed simultaneously with filling the expansion joints with polyurethane elastic glue.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the present invention, by adopting the floor construction technology, the levelness and flatness of the ground can be effectively improved, and the overall service life of the floor can be extended. At the same time, special polishing technology is used, and unique concrete reinforcing materials are utilized to form a high-density, high-strength, super-durable, and high-gloss floor inside and on the surface of the concrete, which can effectively avoid the subsequent ground maintenance and upkeep and costs, increase the aesthetics of the ground, extend the service life of the ground, and effectively ensure the flatness, strength and durability of the floor. At the same time, it reduces quality problems such as poor interlayer bonding that may be caused by layered construction, and the cost is low, which can reduce a lot of material and labor costs, and can also reduce engineering management costs and equipment rental costs. DETAILED DESCRIPTION

[0025] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention relates to a one-step forming construction method for cast-in-place concrete floor, comprising the following steps:

[0027] S1: Material preparation: lithium-based liquid hardened surface layer; non-metallic aggregate wear-resistant surface layer; 200mm thick concrete, the amount of lithium-based liquid hardened surface layer used is 0.4kg / ㎡; the thickness of the non-metallic aggregate wear-resistant surface layer is 2mm, and the material consumption is 5kg / ㎡; steel fibers are mixed in the concrete, the length of the steel fibers is 60mm, the diameter is 0.75mm, the steel fibers are bonded into rows with water-soluble glue, and the two ends are hooked. The tensile strength of the steel fibers is greater than 1100MPa, and the concrete dosage is 23kg / ㎡. The concrete is premixed commercial concrete, the water-cement ratio is less than 0.5, the maximum particle size of the coarse aggregate is not more than 25mm, the slump is 120mm±10m, and the concrete does not contain fly ash;

[0028] S2: Cushion treatment: compact the cushion layer with a compaction coefficient greater than 0.95. After cleaning the cushion layer, lay a single layer of plastic film with a thickness of not less than 0.1mm and an overlap width of not less than 20cm to prevent the moisture of the concrete and the concrete slurry from penetrating into the cushion layer. Pour a 100mm thick C15 concrete cushion layer, clean it 1 day in advance, and sprinkle water to keep it moist;

[0029] S3: Install the formwork: Set construction joints with metal armored joints in the pouring area. The upper layer of the construction joints is fixed at the +0 elevation point. The elevation point error cannot exceed ±1mm / 3m. It is used as the upper layer of the formwork in the pouring area. The lower layer is fixed on the double-layer bidirectional steel bars with a wire mesh to prevent concrete leakage. After the pouring and polishing operation is completed, it is buried in the concrete. The door area is embedded and fixed with metal armored joints to strengthen the rigidity and quality of the formwork. The elevator track steel formwork is used and fixed and stabilized with a fixed bracket. Before and during construction, the upper surface elevation of the formwork is adjusted according to the designed floor elevation. During construction, the warehouse is skipped every 6m. The pouring of the floor is divided into strips and molded on both sides;

[0030] S4: Setting isolation joints: Setting isolation joints at the column footings on the wall side of the pouring area;

[0031] For the deformation joint area, before pouring concrete, reserve the position for installing the bearing deformation joint along both sides of the intersection. After the concrete floor is cured, install the aluminum alloy bearing deformation joint synchronously with filling the expansion joint with polyurethane elastic glue.

[0032] S5: Concrete pouring: After mixing the lithium-based liquid hardened surface layer, the non-metallic aggregate wear-resistant surface layer with concrete, pour the concrete in order of the area, and vibrate it in place with a vibrating rod. When pouring concrete, pumping is adopted. Automobile pumps are preferred. The length of the pump pipe shall not exceed 100m. The transportation time of the concrete truck shall not exceed 20min, and the construction area per hour shall be 150m-200m. Special parts shall be transported by small dump trucks for secondary transportation. After pouring, the quality of the concrete shall be tested on site, and the slump test shall be carried out on the concrete in the unloading and pouring area. Concrete that does not meet the requirements shall be returned, and the mixing station shall be assisted in adjusting the concrete mix ratio;

[0033] S6: Concrete leveling treatment: including the following steps:

[0034] S601: Use a spreader to spread wear-resistant materials. The amount of wear-resistant materials is 5kg / ㎡ to ensure the thickness, flatness and uniformity of the materials. The wear-resistant materials are spread twice. After hardening, use a polishing machine to polish the surface;

[0035] S602: After the concrete has been finally set, the shallow footprints left by people stepping on it are taken as the standard. Then, the double-disc polisher with a circular disc is used for grinding. The grinding and slurry are carried out according to the pouring sequence. Some areas are polished with a single-disc polisher. The edges and corners are polished with a corner polisher. After grinding, the slurry is scraped and leveled in sequence with a manual leveling ruler. The areas with poor flatness are leveled again. After leveling, let it stand for a while;

[0036] S603: After the grinding operation is completed, a double-disc polishing machine with a metal blade is used for polishing. The polishing must be done more than three times. The corresponding edges and corners are polished with a single-disc polishing machine and an edge finishing machine. After the double-disc metal blade polishing is completed, a plastic blade is used for polishing;

[0037] S604: Dry cutting is used to complete the cutting work within 12 hours after the polishing work is completed, and the concrete cracks are induced in advance. The cutting depth is 7cm and the width is 3-5mm;

[0038] S7: Concrete maintenance: After cutting, lay geotextile to keep moisture, maintain constant temperature, and water for more than 15 days;

[0039] S8: Floor construction: Use a floor grinder with water to grind the floor to remove the floating slurry. When the floor surface is relatively dry, use a sprayer to apply lithium-based concrete liquid hardener, keep it moist for more than 20 minutes, use a floor grinder with a resin grinding disc to continuously grind the floor, use a vacuum cleaner to remove excess material, and then use a high-speed polishing machine with a 2000-mesh resin grinding disc to polish the floor, and finally use a sweeper to clean it up to complete the construction.

[0040] The performance of the floor prepared in the present application was compared with the common floor construction process on the market, wherein the present application was recorded as Example 1, and the common floor construction process on the market was recorded as Comparative Examples 1-4. The floor was polished with a polishing machine, and j was the rotation speed, so as to observe its surface. The following is a comparison table:

[0041]

[0042] It can be seen that Example 1 of the present application has obvious improvements in glossiness and hardness.

[0043] The floor construction technology adopted can effectively improve the levelness and flatness of the ground and extend the overall service life of the floor. At the same time, special polishing technology and unique concrete reinforcement materials are used to form high-density, high-strength, super-durable and high-gloss floors inside and on the surface of the concrete, which can effectively avoid the subsequent ground maintenance and upkeep and costs, increase the beauty of the floor, extend the service life of the floor, and effectively ensure the flatness, strength and durability of the floor. At the same time, it reduces quality problems such as poor interlayer bonding caused by layered construction, and the cost is low, which can reduce a lot of material and labor costs, and can also reduce engineering management costs and equipment rental costs.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A one-step forming construction method for cast-in-place concrete floor, characterized in that: The steps include: S1: Material preparation: lithium-based liquid hardened surface layer; non-metallic aggregate wear-resistant surface layer; 200mm thick concrete; S2: Cushion treatment: compact the cushion layer with a compaction coefficient greater than 0.

95. After cleaning the cushion layer, lay a single layer of plastic film with a thickness of not less than 0.1mm and an overlap width of not less than 20cm to prevent the moisture of the concrete and the concrete slurry from penetrating into the cushion layer. Pour a 100mm thick C15 concrete cushion layer, clean it 1 day in advance, and sprinkle water to keep it moist; S3: Install the formwork: Set construction joints with metal armored joints in the pouring area. The upper layer of the construction joints is fixed at the +0 elevation point as the upper layer of the pouring area formwork. The lower layer is fixed to the double-layer bidirectional steel bars with a wire mesh to prevent concrete leakage. After the pouring and polishing operations are completed, they are buried in the concrete. The door area is embedded and fixed with metal armored joints to strengthen the rigidity and quality of the formwork, which is consistent with the upper surface elevation. The elevator track steel formwork is used and fixed and stabilized with a fixed bracket. The upper surface elevation of the formwork is adjusted according to the designed floor elevation before and during construction; S4: Setting isolation joints: Setting isolation joints at the column footings on the wall side of the pouring area; S5: Concrete pouring: After mixing the lithium-based liquid hardened surface layer, the non-metallic aggregate wear-resistant surface layer with concrete, pour the concrete in order of the area, and vibrate it in place with a vibrating rod. When pouring concrete, pumping is adopted. Automobile pumps are preferred. The length of the pump pipe shall not exceed 100m. The transportation time of the concrete truck shall not exceed 20min, and the construction area per hour shall be 150m-200m. Special parts shall be transported by small dump trucks for secondary transportation. After pouring, the quality of the concrete shall be tested on site, and the slump test shall be carried out on the concrete in the unloading and pouring area. Concrete that does not meet the requirements shall be returned, and the mixing station shall be assisted in adjusting the concrete mix ratio; S6: Concrete leveling treatment: including the following steps: S601: Use a spreader to spread wear-resistant materials. The amount of wear-resistant materials is 5kg / ㎡ to ensure the thickness, flatness and uniformity of the materials. The wear-resistant materials are spread twice. After hardening, use a polishing machine to polish the surface; S602: After the concrete has been finally set, the shallow footprints left by people stepping on it are taken as the standard. Then, the double-disc polisher with a circular disc is used for grinding. The grinding and slurry are carried out according to the pouring sequence. Some areas are polished with a single-disc polisher. The edges and corners are polished with a corner polisher. After grinding, the slurry is scraped and leveled in sequence with a manual leveling ruler. The areas with poor flatness are leveled again. After leveling, let it stand for a while; S603: After the grinding operation is completed, a double-disc polishing machine with a metal blade is used for polishing. The polishing must be done more than three times. The corresponding edges and corners are polished with a single-disc polishing machine and an edge finishing machine. After the double-disc metal blade polishing is completed, a plastic blade is used for polishing; S604: Dry cutting is used to complete the cutting work within 12 hours after the polishing work is completed, and the concrete cracks are induced in advance. The cutting depth is 7cm and the width is 3-5mm; S7: Concrete maintenance: After cutting, lay geotextile to keep moisture, maintain constant temperature, and water for more than 15 days; S8: Floor construction: Use a floor grinder with water to grind the floor to remove the floating slurry. When the floor surface is relatively dry, use a sprayer to apply lithium-based concrete liquid hardener, keep it moist for more than 20 minutes, use a floor grinder with a resin grinding disc to continuously grind the floor, use a vacuum cleaner to remove excess material, and then use a high-speed polishing machine with a 2000-mesh resin grinding disc to polish the floor, and finally use a sweeper to clean it up to complete the construction.

2. A one-step forming construction method for cast-in-place concrete floor according to claim 1, characterized in that: In step S1, the amount of lithium-based liquid hardened surface layer used is 0.4kg / ㎡; the thickness of the non-metallic aggregate wear-resistant surface layer is 2mm, and the material amount is 5kg / ㎡; steel fibers are mixed in the concrete, the length of the steel fibers is 60mm, the diameter is 0.75mm, the steel fibers are bonded into rows with water-soluble glue, and the two ends are hooked. The tensile strength of the steel fibers is greater than 1100MPa, and the concrete dosage is 23kg / ㎡. The concrete is premixed commercial concrete, the water-cement ratio is less than 0.5, the maximum particle size of the coarse aggregate is not more than 25mm, the slump is 120mm±10m, and the concrete does not contain fly ash.

3. The one-step forming construction method of cast-in-place concrete floor according to claim 1 is characterized by: In step S2, during construction, the construction is carried out in increments of 6 m, and the floor is poured in strips and blocks, with molds made on both sides.

4. The one-step forming construction method of cast-in-place concrete floor according to claim 1 is characterized by: In step S3, the elevation point error cannot exceed ±1mm / 3m.

5. The one-step forming construction method of cast-in-place concrete floor according to claim 1 is characterized by: In step S4, for the deformation joint area, before pouring concrete, positions for installing the load-bearing deformation joints are reserved along both sides of the intersection, and after the concrete floor is cured, the aluminum alloy load-bearing deformation joints are installed simultaneously with the filling of the expansion joints with polyurethane elastic glue.

Images