CN112282294A - Construction method of steel fiber wear-resistant terrace - Google Patents
Construction method of steel fiber wear-resistant terrace Download PDFInfo
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- CN112282294A CN112282294A CN202011144655.8A CN202011144655A CN112282294A CN 112282294 A CN112282294 A CN 112282294A CN 202011144655 A CN202011144655 A CN 202011144655A CN 112282294 A CN112282294 A CN 112282294A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
- E04F15/14—Construction of joints, e.g. dividing strips
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
- E04F15/14—Construction of joints, e.g. dividing strips
- E04F15/142—Dividing strips or boundary strips
Abstract
The invention discloses a construction method of a steel fiber wear-resistant terrace, which specifically comprises the following steps: the concrete cushion layer construction sequentially comprises the following processes of surveying a site, determining elevation, manufacturing a template, wetting a site before concrete pouring, self-discharging concrete, assisting in leveling by laser equipment, vibrating by a handheld vibrating scraper, lifting and polishing by a polishing machine, paying off and grooving the next day, and maintaining; laying steel fiber concrete on a concrete cushion layer, wherein the steel fiber concrete construction sequentially comprises the following processes of erecting a template, installing a laser emitter, pouring the steel fiber concrete, manually assisting and flattening, laser leveling, construction of a hardening agent and filling gaps; and (5) constructing a wear-resistant surface layer. The terrace constructed by the method is not easy to crack, the surface is dense and smooth, the color is uniform, and the phenomena of sand holes and peeling are avoided.
Description
Technical Field
The invention relates to a method for constructing a terrace, in particular to a method for constructing a steel fiber wear-resistant terrace.
Background
With the gradual advance of industrialization in China and the rapid development of society, the application of the terrace is gradually increased, and in a plurality of terrace construction methods, the concrete wear-resistant terrace has good economic benefit and social benefit due to the characteristics of high pollution resistance, high impact resistance, rapid construction, dust prevention, good ground strength and good overall performance, and the rich colors of the wear-resistant terrace. However, in the terrace construction, there are some problems to be solved urgently, for example, the terrace area is large, concrete is easy to produce shrinkage crack, the connecting part of the structural column and the terrace structure is easy to produce crack due to stress concentration, if the workshop foundation backfill layer is not compact, the terrace will produce uneven settlement and cause the problem of cracking.
Disclosure of Invention
The invention aims to provide a construction method of a steel fiber wear-resistant terrace, which can solve the technical problems mentioned in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme:
a construction method of a steel fiber wear-resistant floor comprises the following steps:
(1) construction of concrete bedding
The concrete cushion layer construction sequentially comprises the following processes of surveying a site, determining elevation, manufacturing a template, wetting a site before concrete pouring, self-discharging concrete, assisting in leveling by laser equipment, vibrating by a handheld vibrating scraper, lifting and polishing by a polishing machine, paying off and grooving the next day, and maintaining;
(2) steel fiber concrete construction
Lay steel fibre concrete on the concrete cushion, steel fibre concrete construction includes following flow in proper order, props up and establishes template, installation laser emitter, pours steel fibre concrete, artifical supplementary shakeouts, laser leveling, hardener construction, caulking, wherein, props up and establishes the template and specifically includes following step:
a. installing templates by a bin-by-bin pouring method, arranging templates according to the design height of a platform, coating template oil on the templates, detecting the elevation and the parallelism of the templates by using a level meter and a total station at any time, adjusting the deviation of the elevation by using a wedge block, straightening the joint edges by using a cutting machine before next pouring, wherein the length of the templates is not more than 6 meters;
b. the steel fiber concrete terrace is isolated from the wall and the column by adopting a polystyrene board with the thickness of 5 mm;
c. four diamond angle irons are installed on the periphery of the column, so that the four diamond angle irons surround a square, the diamond angle irons are the same as the designed elevation of the terrace, included angles formed by the diamond angle irons and the transverse contraction joints of the terrace and the longitudinal construction joints of the terrace are 45 degrees, and a polystyrene extruded sheet is fixed between the diamond angle irons and the concrete cushion layer;
d. installing a dowel bar: embedding a metal sleeve at a terrace construction joint, and installing round steel as a dowel bar in the metal sleeve after primary pouring;
(3) construction of wear-resistant surface layer
After the construction of the steel fiber concrete layer is finished, the construction of a wear-resistant surface layer is carried out, the construction of the wear-resistant surface layer sequentially comprises the following processes of finishing the ground surface of leveling, mechanically lifting slurry, scattering materials for the first time, mechanically smearing and pressing, scattering materials for the second time, mechanically smearing and pressing, mechanically finishing and maintaining.
Preferably, in the part a in the step (2), the template is a 180mm high fixed channel steel mold.
Preferably, in the step (2), two parallel transverse steel bars are arranged below the diamond-shaped angle iron respectively, the transverse steel bars are fixed through two vertical steel bars, and the diamond-shaped angle iron is fixed at the upper end of the vertical steel bar.
Preferably, part d in the step (2), the specification of the metal sleeve is phi 22, the specification of the round steel is phi 18@400 × 300, and the round steel is exposed by 200 mm.
Preferably, in the step (2), the hardener is used in the construction of the hardener
-CureHard-24。
Preferably, in the step (2), the construction method of the hardening agent is as follows:
a. when the steel fiber concrete surface is finally set and can walk without generating foot prints, immediately applying a ground hardener after the powder coating operation before surface cracks are generated, and keeping all the surfaces under the wet condition for 30 minutes by using the ground hardener;
b. when the feet feel smooth and thick, the water mist ground hardener is sprayed on the ground;
c. when the feet become thick again, the whole surface is thoroughly rinsed with water and wiped dry to remove all surface stains and residual ground hardener; in outdoor concrete broom surfaces, after 30-40 minutes, no water rinse is required, but any residual reactants or ground hardener must be wiped off or swept away.
Preferably, in the step (2), the steel fiber concrete adopts cement with zero content of P.O42.5 fly ash, sand with fineness modulus of 2.6-2.8, medium sand with mud content less than 2%, and continuous graded stones with 5-25mm as raw materials, and removes impurities contained in the aggregate, and the steel fiber adopts a magnetization degaussing process.
Preferably, in the step (3), glue pouring is performed after curing, and the concrete steps of glue pouring are as follows:
a. cleaning dust in the gaps by using an air blower;
b. filling 6mm foam strips into the gaps for embedding;
c. paper adhesive tapes are pasted on two sides of the gap so as to prevent the floor surface layer from being polluted during gluing;
d. coating cold bottom oil on two sides of the side wall of the gap;
e. filling the gap with gap filling glue;
f. and finally, scraping the surface of the sealant by using a flat scraping ruler dipped with soap water.
Compared with the prior art, the invention has the beneficial effects that:
1) the terrace constructed by the method is not easy to crack, the surface is dense and smooth, the color is uniform, and the phenomena of sand holes and peeling are avoided.
2) According to the invention, the four diamond angle irons are arranged on the periphery of the pillar, so that the steel fiber concrete can be cast and formed at one time, the traditional secondary casting is not needed, and the cast and formed steel fiber concrete layer can be prevented from cracking and has a smoother surface.
Drawings
FIG. 1 is a top view of a diamond angle iron installation in an embodiment of the present invention;
FIG. 2 is a schematic illustration of the installation of transverse and vertical reinforcement bars in an embodiment of the invention;
in the figure, 1, a column, 2, diamond angle iron, 3, a horizontal floor contraction joint, 4, a vertical floor construction joint, 5, a polystyrene extruded sheet, 6, a horizontal steel bar and 7, a vertical steel bar.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A construction method of a steel fiber wear-resistant floor comprises the following steps:
(1) construction of concrete bedding
The concrete cushion layer construction sequentially comprises the following processes of surveying a site, determining elevation, manufacturing a template, wetting a site before concrete pouring, self-discharging concrete, assisting in leveling by laser equipment, vibrating by a handheld vibrating scraper, lifting and polishing by a polishing machine, paying off and grooving the next day, and maintaining; wherein, the concrete must cut the seam in time within 24 hours after solidification to prevent the generation of irregular cracks; after the cutting line is bounced, the cushion concrete is completely watered by a watering cart immediately to maintain the floor, and then the watering cart is used for fully watering to maintain the floor for not less than 3 times a day; the concrete of the cushion layer does not allow objects which are heavy or exceed the bearing capacity of the cushion layer to be rolled and stacked within 7 days.
(2) Steel fiber concrete construction
Treating the concrete cushion layer: cleaning a base layer before ground pouring; laying a PE film before concrete pouring: the high-density Polyethylene (PE) film isolation layer has a lap joint width of not less than 500 mm. Erecting a steel template at the parting position, and rechecking the size and elevation of the template to meet the design requirement; and an armored and sewn double angle steel is arranged under the fireproof door and the roller shutter at the platform.
The steel fiber concrete is laid on the concrete cushion layer, the raw materials of the steel fiber concrete adopt P.O42.5 fly ash zero-doped cement, sand with fineness modulus of 2.6-2.8, medium sand with mud content less than 2% and 5-25mm continuous graded stones, impurities contained in aggregate are removed, the steel fiber adopts a magnetization degaussing process, the steel fiber is arranged neatly in a packing box, the caking phenomenon is completely avoided in the packing and transportation processes, and the caking possibility in the adding process is reduced.
When the steel fiber is added in the concrete stirring process, in order to prevent the steel fiber from caking, the steel fiber is put on the stone conveyer belt during the stirring process, the correct pouring direction of the steel fiber needs to be ensured, the steel fiber is prevented from being subjected to the caking phenomenon of hooking when falling on the gravel aggregate, and the caking is avoided. The once stirring amount is determined with a stirring station before construction, and workers are strictly required to be thrown according to the parameter not less than 15 kg/cubic meter so as to ensure the quality of the steel fiber concrete. According to the distance between a construction site and a stirring ground, the slump is controlled to be 180 +/-20 mm, the initial setting time of the concrete is 6-8 hours, and the final setting time is 10-12 hours, so that the construction quality of the concrete is ensured. Transport vehicles are reasonably arranged, the continuity of concrete entering is guaranteed, and long-time waiting of the tank car on a construction site is avoided.
The steel fiber concrete construction sequentially comprises the following processes of erecting a template, installing a laser emitter, pouring steel fiber concrete, manually assisting and flattening, laser leveling, hardening agent construction and joint filling.
The erecting template specifically comprises the following steps:
a. installing a template by a bin pouring method, arranging the template according to the design height of a platform, wherein the template adopts a 180mm high fixed-slot steel mould, coating template oil on the template, the length of the template is not more than 6 meters, detecting the elevation and the parallelism of the template at any time by using a level instrument and a total station, adjusting the elevation deviation by using a wedge block, and straightening the joint edge by using a cutting machine before the next pouring, wherein the perpendicularity of the template is deviated by 20-30 mm;
b. the steel fiber concrete terrace is isolated from the wall and the column by adopting a polystyrene board with the thickness of 5 mm;
c. as shown in fig. 1-2, four diamond angle irons 2 are installed on the periphery of a column 1, so that the four diamond angle irons enclose a square, the diamond angle irons 2 are the same as the designed elevation of a terrace, included angles formed by the diamond angle irons 2, a transverse contraction joint 3 of the terrace and a longitudinal construction joint 4 of the terrace are 45 degrees, two transverse steel bars 6 arranged in parallel are respectively arranged below the diamond angle irons 2, the transverse steel bars 6 are fixed through two vertical steel bars 7, the diamond angle irons 2 are fixed at the upper ends of the vertical steel bars 7, and polystyrene extruded sheets 5 are fixed between the diamond angle irons 2 and a concrete cushion layer;
d. installing a dowel bar: embedding a metal sleeve at a terrace construction joint, installing round steel as a dowel bar in the metal sleeve after one-time pouring, wherein the specification of the metal sleeve adopts phi 22, the specification of the round steel adopts phi 18@400 multiplied by 300, and the round steel is exposed by 200 mm;
the hardener is used in the construction
Cure hard-24, and the construction method of the hardening agent is as follows:
a. when the steel fiber concrete surface is finally set and can walk without generating foot prints, immediately applying a ground hardener after the powder coating operation before surface cracks are generated, and keeping all the surfaces under the wet condition for 30 minutes by using the ground hardener;
b. when the feet feel smooth and thick, the water mist ground hardener is sprayed on the ground;
c. when the feet become thick again, the whole surface is thoroughly rinsed with water and wiped dry to remove all surface stains and residual ground hardener; in outdoor concrete broom surfaces, after 30-40 minutes, no water rinse is required, but any residual reactants or ground hardener must be wiped off or swept away.
The flatness needs to be monitored in the steel fiber concrete laying process:
a. the first step of monitoring: every time the leveling machine carries out leveling operation, the leveling monitoring of 1 point is guaranteed to be carried out every 1 square meter of the flat plate block. The special person is dispatched to monitor in real time by an instrument so as to ensure that each square meter leveled is qualified and leveled.
b. And a second step of monitoring: when the mechanical slurry is lifted and strickled off before the initial setting of the concrete, the instrument is used for monitoring in real time so as to ensure that each flat meter is qualified and flat.
c. And a third step of monitoring: when the slurry is extracted and scraped after 60% of wear-resistant material is spread, real-time monitoring is carried out by an instrument in time, and each flat meter leveled is qualified and leveled.
d. And a fourth step of monitoring: when the slurry is extracted and scraped after 40% of wear-resistant material is spread, real-time monitoring is carried out by an instrument in time, and each flat meter leveled is qualified and leveled.
e. Once the leveling error is found, the measurement and correction are carried out in time so as to ensure that the whole plate is leveled and qualified.
(3) Construction of wear-resistant surface layer
After the construction of the steel fiber concrete layer is finished, the construction of a wear-resistant surface layer is carried out, the wear-resistant material is the Xika JD mineral wear-resistant aggregate, the construction of the wear-resistant surface layer sequentially comprises the following processes of finishing the ground of leveling, mechanically lifting slurry, scattering materials for the first time, mechanically smearing, scattering materials for the second time, mechanically smearing, mechanically smoothing and maintaining.
And (3) performing glue pouring after curing, wherein the glue pouring comprises the following specific steps:
a. cleaning dust in the gaps by using an air blower;
b. filling 6mm foam strips into the gaps for embedding;
c. paper adhesive tapes are pasted on two sides of the gap so as to prevent the floor surface layer from being polluted during gluing;
d. coating cold bottom oil on two sides of the side wall of the gap;
e. filling the gap with gap filling glue;
f. and finally, scraping the surface of the sealant by using a flat scraping ruler dipped with soap water.
Crack control and treatment scheme in construction process
a. Controlling slump, and enabling field construction managers to check at any time and timely contact with a concrete company when exceeding the requirement;
b. reinforcing vibration of concrete at joints such as column feet, armor seam edges and the like, and reinforcing vibration at positions with too long interval time between concrete pouring at two sides;
c. the polishing is strengthened and compacted, the light collection is kept consistent in color, and the ground finish surface is prevented from being scratched;
d. the shrinkage time of concrete must be mastered when cutting the seam, and the seam is cut when cutting;
e. the heavy load can not be lifted within 14 days after the ground is poured, and the materials need to be uniformly stacked, so that the load concentration and the safety quality accident are avoided.
Analysis of causes of cracks
Due to different concrete composition materials, micro-structure and external influences, the concrete cracks are generated for a plurality of reasons, and the cracks generated in the building mainly comprise the following factors:
a. during the hardening process of concrete, the volume deformation caused by drying shrinkage is restrained to generate cracks, the width of the cracks is sometimes large, and even the cracks penetrate through the whole component;
b. the volume expansion and contraction generated by the thermal expansion and cold contraction of the concrete are limited by the constraint force, temperature stress is generated inside the concrete, and the concrete is easy to be pulled and cracked by the tensile stress caused by the temperature due to low tensile strength, so that temperature cracks are generated.
Repair scheme for cracks
If large-area net cracks occur, cutting is required to be carried out within the parting line within the range of 6 meters multiplied by 6 meters or 3 meters multiplied by 3 meters (according to actual conditions), the concrete with fine stones is poured after the surface of the terrace to be processed is removed by 5 to 8 centimeters, and the wear-resistant materials and the light are spread again. If the terrace has a single crack, the original crack is cut into a V shape with the width of 5-15mm and the depth of 20-30mm by a cutting machine, after the cutting is finished, tools such as a steel wire brush, an angle grinder and the like are used for removing concrete scraps, dust, scum, a loose layer and other dirt in the crack, and then the crack is washed clean by water and is filled with professional grouting material.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.
Claims (8)
1. The construction method of the steel fiber wear-resistant terrace is characterized by comprising the following steps of:
(1) construction of concrete bedding
The concrete cushion layer construction sequentially comprises the following processes of surveying a site, determining elevation, manufacturing a template, wetting a site before concrete pouring, self-discharging concrete, assisting in leveling by laser equipment, vibrating by a handheld vibrating scraper, lifting and polishing by a polishing machine, paying off and grooving the next day, and maintaining;
(2) steel fiber concrete construction
Lay steel fibre concrete on the concrete cushion, steel fibre concrete construction includes following flow in proper order, props up and establishes template, installation laser emitter, pours steel fibre concrete, artifical supplementary shakeouts, laser leveling, hardener construction, caulking, wherein, props up and establishes the template and specifically includes following step:
a. installing templates by a bin-by-bin pouring method, arranging templates according to the design height of a platform, coating template oil on the templates, detecting the elevation and the parallelism of the templates by using a level meter and a total station at any time, adjusting the deviation of the elevation by using a wedge block, straightening the joint edges by using a cutting machine before next pouring, wherein the length of the templates is not more than 6 meters;
b. the steel fiber concrete terrace is isolated from the wall and the column by adopting a polystyrene board with the thickness of 5 mm;
c. four diamond angle irons are installed on the periphery of the column, so that the four diamond angle irons surround a square, the diamond angle irons are the same as the designed elevation of the terrace, included angles formed by the diamond angle irons and the transverse contraction joints of the terrace and the longitudinal construction joints of the terrace are 45 degrees, and a polystyrene extruded sheet is fixed between the diamond angle irons and the concrete cushion layer;
d. installing a dowel bar: embedding a metal sleeve at a terrace construction joint, and installing round steel as a dowel bar in the metal sleeve after primary pouring;
(3) construction of wear-resistant surface layer
After the construction of the steel fiber concrete layer is finished, the construction of a wear-resistant surface layer is carried out, the construction of the wear-resistant surface layer sequentially comprises the following processes of finishing the ground surface of leveling, mechanically lifting slurry, scattering materials for the first time, mechanically smearing and pressing, scattering materials for the second time, mechanically smearing and pressing, mechanically finishing and maintaining.
2. The construction method of the steel fiber wear-resistant terrace according to claim 1, characterized in that: in the part a in the step (2), the template adopts a 180mm high fixed-slot steel mold.
3. The construction method of the steel fiber wear-resistant terrace according to claim 1, characterized in that: and (c) in the step (2), two parallel transverse steel bars are arranged below the diamond-shaped angle iron respectively, the transverse steel bars are fixed through two vertical steel bars, and the diamond-shaped angle iron is fixed at the upper end of the vertical steel bars.
4. The construction method of the steel fiber wear-resistant terrace according to claim 1, characterized in that: in the part d in the step (2), the specification of the metal sleeve adopts phi 22, the specification of the round steel adopts phi 18@400 multiplied by 300, and the round steel is exposed by 200 mm.
5. The construction method of the steel fiber wear-resistant terrace according to claim 1, characterized in that: in the step (2), the hardening agent is adopted during the construction of the hardening agent
-CureHard-24。
6. The construction method of the steel fiber wear-resistant terrace according to claim 1, wherein in the step (2), the construction method of the hardening agent is as follows:
a. when the steel fiber concrete surface is finally set and can walk without generating foot prints, immediately applying a ground hardener after the powder coating operation before surface cracks are generated, and keeping all the surfaces under the wet condition for 30 minutes by using the ground hardener;
b. when the feet feel smooth and thick, the water mist ground hardener is sprayed on the ground;
c. when the feet become thick again, the whole surface is thoroughly rinsed with water and wiped dry to remove all surface stains and residual ground hardener; in outdoor concrete broom surfaces, after 30-40 minutes, no water rinse is required, but any residual reactants or ground hardener must be wiped off or swept away.
7. The construction method of the steel fiber wear-resistant terrace according to claim 1, characterized in that: in the step (2), the steel fiber concrete adopts cement with zero content of P.O42.5 fly ash, sand with fineness modulus of 2.6-2.8, medium sand with mud content less than 2% and continuous graded stones with 5-25mm as raw materials, impurities contained in aggregate are removed, and the steel fiber adopts a magnetization degaussing process.
8. The construction method of the steel fiber wear-resistant terrace according to claim 1, wherein in the step (3), glue pouring is performed after maintenance, and the concrete steps of glue pouring are as follows:
a. cleaning dust in the gaps by using an air blower;
b. filling 6mm foam strips into the gaps for embedding;
c. paper adhesive tapes are pasted on two sides of the gap so as to prevent the floor surface layer from being polluted during gluing;
d. coating cold bottom oil on two sides of the side wall of the gap;
e. filling the gap with gap filling glue;
f. and finally, scraping the surface of the sealant by using a flat scraping ruler dipped with soap water.
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| CN113622452A (en) * | 2021-08-13 | 2021-11-09 | 浙江省建工集团有限责任公司 | Construction method of refrigeration house terrace and refrigeration house terrace |
| CN113958087A (en) * | 2021-10-30 | 2022-01-21 | 上海宝冶集团有限公司 | Large-area steel fiber super-flat terrace construction method suitable for industrial factory building |
| CN114890741A (en) * | 2022-05-11 | 2022-08-12 | 中建八局第二建设有限公司 | Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof |
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| CN113622452A (en) * | 2021-08-13 | 2021-11-09 | 浙江省建工集团有限责任公司 | Construction method of refrigeration house terrace and refrigeration house terrace |
| CN113958087A (en) * | 2021-10-30 | 2022-01-21 | 上海宝冶集团有限公司 | Large-area steel fiber super-flat terrace construction method suitable for industrial factory building |
| CN114890741A (en) * | 2022-05-11 | 2022-08-12 | 中建八局第二建设有限公司 | Low-carbon self-leveling lightweight concrete and preparation method and construction method thereof |
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Application publication date: 20210129 |