CN115653177A - Construction method of cast-in-place reinforced concrete hollow floor - Google Patents
Construction method of cast-in-place reinforced concrete hollow floor Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 46
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 32
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- 239000010959 steel Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 5
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- 238000011084 recovery Methods 0.000 claims abstract description 3
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- 239000000835 fiber Substances 0.000 claims description 53
- 238000002360 preparation method Methods 0.000 claims description 45
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
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- 229920002635 polyurethane Polymers 0.000 claims description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 14
- 239000006229 carbon black Substances 0.000 claims description 12
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 10
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 10
- 229960000583 acetic acid Drugs 0.000 claims description 10
- 239000012362 glacial acetic acid Substances 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 9
- 229920002907 Guar gum Polymers 0.000 claims description 8
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000004568 cement Substances 0.000 claims description 8
- 239000000665 guar gum Substances 0.000 claims description 8
- 229960002154 guar gum Drugs 0.000 claims description 8
- 235000010417 guar gum Nutrition 0.000 claims description 8
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- 239000010881 fly ash Substances 0.000 claims description 5
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 4
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- 238000004873 anchoring Methods 0.000 claims description 3
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- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical compound [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 claims description 2
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- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 4
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention discloses a construction process of a cast-in-place reinforced concrete hollow floor, which comprises the following steps: s1, mounting a support plate and a support column to obtain a template; s2, binding steel bars on the template, and installing a side beam frame and a hidden beam frame to form a supporting seat; s3, pouring concrete and vibrating to compact, and curing and air-drying the concrete to form a concrete layer; s4, disassembling the recovery template to complete construction; the hidden beam frame comprises a first connecting rib, a second connecting rib and a third connecting rib; first splice bar, second splice bar and third splice bar are parallel to each other and follow the length direction of hidden beam frame extends, first splice bar, second splice bar and third splice bar are close to the one end of boundary beam with the distance of boundary beam frame is from far away and near arranging this application in proper order and have the effect that improves the compressive capacity of hollow superstructure.
Description
Technical Field
The invention relates to the field of buildings, in particular to a construction method of a cast-in-place reinforced concrete hollow floor.
Background
With the continuous, stable and rapid development of economy in China, the national investment on buildings is increased, the construction industry is developed unprecedentedly, the overall technical level of the construction industry is greatly improved, and the cast-in-place concrete hollow floor is a popular floor structure form.
The cast-in-place concrete hollow floor is formed by arranging light materials in a certain rule and replacing a part of concrete of the solid floor to form a cavity or a light sandwich to form the cavity or the light sandwich, however, in the construction process of the cast-in-place concrete hollow floor, the density of the concrete at the bottom is not uniform when the concrete is cast, the structure of the integral floor is not uniform, the compression resistance of the hollow floor is low, and potential safety hazards exist in the use in the future.
Disclosure of Invention
In order to improve the compression resistance of the hollow floor, the application provides a construction method of a cast-in-place reinforced concrete hollow floor.
The application provides a construction method of a cast-in-place reinforced concrete hollow floor, which adopts the following technical scheme:
a construction method of a cast-in-place reinforced concrete hollow floor comprises the following steps:
s1, mounting a support plate and a support column to obtain a template;
s2, binding reinforcing steel bars on the template, and installing a side beam frame and a hidden beam frame to form a supporting seat;
s3, pouring concrete and vibrating to compact, and curing and air-drying the concrete to form a concrete layer;
s4, disassembling the recovery template to complete construction;
the hidden beam frame comprises a first connecting rib, a second connecting rib and a third connecting rib; first splice bar, second splice bar and third splice bar are parallel to each other and follow the length direction of hidden beam frame extends, first splice bar, second splice bar and third splice bar are close to the one end of boundary beam with the distance of boundary beam frame is from far away and near arranging in proper order.
By adopting the technical scheme, the first connecting rib, the second connecting rib and the third connecting rib are arranged at the hidden beam frame in the process of installing the hidden beam frame and the side beam frame, the hidden beam frame and the side beam frame are fixed by the first connecting rib, the second connecting rib and the third connecting rib, the rigidity of the hollow floor structure can be enhanced, the distance between the first connecting rib, the second connecting rib and the side beam frame is limited, the first connecting rib, the second connecting rib and the third connecting rib are arranged from near to far, the first connecting rib is closer to the side beam frame than the second connecting rib and the third connecting rib, the second connecting rib is closer to the side beam frame than the third connecting rib, the first connecting rib, the second connecting rib and the third connecting rib form a ladder shape, the rigidity between the side beam frame and the hidden beam frame can be enhanced when concrete is poured, the density of concrete at the bottom of the side beam frame and the hidden beam frame is effectively improved, and the rigidity of the hollow floor is further enhanced; when the concrete is poured, the concrete is vibrated compactly, so that the concrete can be fully filled to the position of the support column close to the bottom, the concrete is fully filled, and the pressure resistance of the hollow floor is improved.
Preferably, the hidden beam frame (2) is provided with a stirrup (24), and the stirrup (24) surrounds the first connecting rib (21), the second connecting rib (22) and the third connecting rib (23).
Through adopting above-mentioned technical scheme, the stirrup encircles first splice bar, second splice bar, third splice bar, and then prescribes a limit to the position of first splice bar, second splice bar, third splice bar, and the difficult displacement that appears of reinforcing bar when making concreting improves construction security and quality.
Preferably, the reinforcing bars (4) comprise a first reinforcing bar (41), a second reinforcing bar (42), a third reinforcing bar (43) and a fourth reinforcing bar (44); the first steel bar (41) is fixedly connected to the side beam frame (3); the second steel bar (42) is anchored and connected to the supporting column (1); the third steel bar (43) is mounted in an anchoring manner and penetrates through the support column (1); the fourth steel bar (44) is fixedly connected to the hidden beam frame (2).
Through adopting above-mentioned technical scheme, first reinforcing bar anchor is in boundary beam frame department, and the fourth reinforcing bar anchor is in the hidden beam frame, and second reinforcing bar and third reinforcing bar are fixed with the support column, and first reinforcing bar, second reinforcing bar, third reinforcing bar and fourth reinforcing bar are mutually supported, make hidden beam frame and boundary beam frame all fix on the support column, and then improve the quality of constructing hollow superstructure.
Preferably, the concrete layer comprises concrete, and the concrete is prepared from the following raw materials in parts by weight: coarse aggregate: 650-750 parts of; fine aggregate: 1000-1100 parts; cement: 400-500 parts; fly ash: 80-120 parts; water: 250-350 parts; modified basalt fiber: 70-80 parts; modified highland barley fiber: 50-60 parts; polyurethane: 20-30 parts of a solvent; water reducing agent: 3-7 parts; other auxiliary agents: 0-6 parts.
By adopting the technical scheme, the modified basalt fiber, the modified highland barley fiber and the polyurethane are added into the formula for preparing the concrete, under the common cooperation of the three, the three are uniformly dispersed in the concrete mixture and coated on the surfaces of the coarse aggregate and the fine aggregate, and meanwhile, the cement is coated on the modified basalt fiber and the modified highland barley fiber, so that the gaps among the components in the concrete are reduced, the compressive strength of the concrete is further improved, and the compressive performance of the hollow floor can be improved by the concrete poured during construction.
Preferably, the preparation method of the modified basalt fiber comprises the following steps: mixing 10-20 parts by weight of polyvinyl chloride and 20-30 parts by weight of guar gum, adding 5-15 parts by weight of N-methylpyrrolidone and 10-20 parts by weight of basalt fiber while heating, uniformly stirring, and cooling to obtain the modified basalt fiber, wherein the weight ratio of the polyvinyl chloride to the guar gum to the N-methylpyrrolidone is (1.2-1.5): (2.6-2.8): 1.
by adopting the technical scheme, the basalt fiber is modified, the dispersity of the basalt fiber is improved, the modified basalt fiber is not easy to gather in concrete, the section strength of the modified basalt fiber and a concrete mixture is improved, and the compression resistance of the concrete is improved.
Preferably, the preparation method of the modified highland barley fiber comprises the following steps: mixing and stirring 10-20 parts by weight of highland barley fiber, 5-9 parts by weight of carbon black and 10-20 parts by weight of acrylic acid, standing, adding 5-10 parts by weight of glacial acetic acid, uniformly stirring, filtering and drying to obtain the modified highland barley fiber, wherein the weight ratio of the carbon black to the acrylic acid to the glacial acetic acid is 1: (3.2-3.6): (1.2-1.4).
By adopting the technical scheme, the highland barley fiber is modified, the carbon black is attached to the highland barley fiber through the acrylic acid and the glacial acetic acid, the modified highland barley fiber is applied to the concrete and can improve the compression resistance of the concrete, and meanwhile, the carbon black and the highland barley fiber attached to the highland barley fiber are filled into the micro pores of the coarse aggregate and the fine aggregate, so that the sulfate in the outside can be effectively prevented from invading the concrete and further the corrosion resistance of the concrete is improved.
Preferably, the weight ratio of the modified basalt fiber to the modified highland barley fiber to the polyurethane is (2.8-3): (2.2-2.4): 1.
by adopting the technical scheme, when the modified basalt fiber, the modified highland barley fiber and the polyurethane are in a specific mass ratio, the modified basalt fiber, the modified highland barley fiber and the polyurethane can fill gaps between coarse aggregates and fine aggregates, so that the connection strength between various raw materials is improved, sulfate which is easy to corrode concrete is not easy to enter the concrete, and the compression strength and the corrosion resistance of the concrete are further improved.
Preferably, the other auxiliary agent comprises one of triethanolamine and calcium acetate; the water reducing agent comprises one of a lignosulfonate water reducing agent, a polycarboxylate high-efficiency water reducing agent and a naphthalene high-efficiency water reducing agent.
By adopting the technical scheme, the other additives and the water reducing agent adopt the compound, so that the compression resistance of the prepared concrete can be improved.
Preferably, the preparation method of the concrete comprises the following steps: mixing and stirring the coarse aggregate and the fine aggregate, adding cement, modified basalt fiber, modified highland barley fiber and polyurethane, and continuously stirring to obtain a stirring material; adding the fly ash, the water reducing agent, other auxiliaries and water into the stirring material, and continuously stirring to obtain the concrete.
By adopting the technical scheme, the raw materials of the concrete are mixed according to the steps, so that the dispersibility of the raw materials in the concrete is improved, the concrete with high compressive strength is further prepared, and the operation of constructing and pouring the concrete is simple.
In summary, the present application has the following beneficial effects:
1. the first connecting rib, the second connecting rib and the third connecting rib are arranged at the position of the hidden beam frame in the process of installing the hidden beam frame and the side beam frame, the hidden beam frame and the side beam frame are fixed by the first connecting rib, the second connecting rib and the third connecting rib, the rigidity of a hollow floor structure can be enhanced, the distance between the first connecting rib, the second connecting rib and the side beam frame is limited, the first connecting rib, the second connecting rib and the third connecting rib are arranged from near to far, the first connecting rib is closer to the side beam frame than the second connecting rib and the third connecting rib, the second connecting rib is closer to the side beam frame than the third connecting rib, the first connecting rib, the second connecting rib and the third connecting rib form a ladder shape, the rigidity between the side beam frame and the hidden beam frame can be enhanced when concrete is poured, the density of the bottom of the side beam frame and the hidden beam frame is effectively improved, and the rigidity of the hollow concrete floor is further enhanced; when the concrete is poured, the concrete is vibrated compactly, so that the concrete can be fully filled to the position of the support column close to the bottom, the concrete is fully filled, and the pressure resistance of the hollow floor is improved.
2. According to the application, the modified basalt fiber, the modified highland barley fiber and the polyurethane are added into a formula for preparing the concrete, under the common cooperation of the three, the three are uniformly dispersed in a concrete mixture and coated on the surfaces of the coarse aggregate and the fine aggregate, and meanwhile, cement covers the modified basalt fiber and the modified highland barley fiber, so that gaps among all components in the concrete are reduced, the compressive strength of the concrete is further improved, and the compressive property of the hollow floor can be improved by the concrete poured during construction.
3. The basalt fiber is modified, the dispersity of the basalt fiber is improved, the modified basalt fiber is not prone to gathering in concrete, the section strength of the modified basalt fiber and a concrete mixture is further improved, and the compression resistance of the concrete is further improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present application.
Fig. 2 is a schematic view of the installation position of the reinforcing bars according to the present application.
Fig. 3 is a schematic position diagram of the junction between the hidden beam frame and the side beam frame.
Fig. 4 is a schematic view of the installation position of the dark beam frame of the present application.
Description of reference numerals:
1. a support pillar; 11. connecting the supporting columns; 12. a boundary beam support column; 13. a hidden beam support column; 14. a support plate; 2. a hidden beam frame; 21. a first connecting rib; 22. a second connecting rib; 23. a third connecting rib; 24. hooping; 3. a side frame; 4. reinforcing steel bars; 41. a first reinforcing bar; 42. a second reinforcing bar; 43. a third reinforcing bar; 44. and a fourth reinforcing steel bar.
Detailed Description
The present application will be described in further detail with reference to examples.
Preparation example
Preparation example 1
A preparation method of modified basalt fiber comprises the following steps: stirring 10kg of polyvinyl chloride and 20kg of guar gum for 10min at the rotation speed of 60r/min, heating at 80 ℃ while adding 5kg of N-methyl pyrrolidone and 10kg of basalt fiber, stirring uniformly for 20min at the rotation speed of 100r/min, and cooling to room temperature to obtain the modified basalt fiber.
Preparation example 2
A preparation method of modified basalt fiber comprises the following steps: stirring 20kg of polyvinyl chloride and 30kg of guar gum for 10min at the rotation speed of 60r/min, heating at 80 ℃ while adding 15kg of N-methyl pyrrolidone and 20kg of basalt fiber, stirring uniformly for 20min at the rotation speed of 100r/min, and cooling to room temperature to obtain the modified basalt fiber.
Preparation example 3
A preparation method of modified basalt fiber comprises the following steps: the difference from preparation example 1 is that the amount of polyvinyl chloride charged is 12kg, the amount of guar gum charged is 26kg, and the amount of N-methylpyrrolidone charged is 10kg.
Preparation example 4
A preparation method of modified basalt fiber comprises the following steps: the differences from preparation example 1 are that the amount of polyvinyl chloride charged is 15kg, the amount of guar gum charged is 28kg, and the amount of N-methylpyrrolidone charged is 10kg.
Preparation example 5
A preparation method of modified highland barley fiber comprises the following steps: mixing and stirring 10kg of highland barley fiber, 5kg of carbon black and 10kg of acrylic acid at the temperature of 50 ℃ and the rotation speed of 80r/min for 20min, standing for 4h, adding 5kg of glacial acetic acid, stirring for 5min at the temperature of 40 ℃, filtering, and drying for 2h at the temperature of 80 ℃ to obtain the highland barley fiber.
Preparation example 6
A preparation method of modified highland barley fiber comprises the following steps: mixing 20kg of highland barley fiber, 9kg of carbon black and 20kg of acrylic acid at 50 ℃ and 80r/min for 20min, standing for 4h, adding 10kg of glacial acetic acid, stirring for 5min at 40 ℃, filtering, and drying for 2h at 80 ℃ to obtain the highland barley fiber.
Preparation example 7
A preparation method of modified highland barley fiber comprises the following steps: the difference from preparation example 5 was that the amount of carbon black charged was 5kg, the amount of acrylic acid charged was 16kg, and the amount of glacial acetic acid charged was 6kg.
Preparation example 8
A preparation method of modified highland barley fiber comprises the following steps: the difference from production example 5 is that the amount of carbon black charged is 5kg, the amount of acrylic acid charged is 18kg, and the amount of glacial acetic acid charged is 8kg.
Examples
Example 1
A construction method of a cast-in-place reinforced concrete hollow floor comprises the following specific steps: with reference to figure 1 of the drawings,
s1, a worker installs a plurality of supporting columns 1 and supporting plates 14 according to a construction site, wherein each supporting column 1 comprises a connecting supporting column 11, an edge beam supporting column 12 and a hidden beam supporting column 13, two groups of supporting plates 14 are arranged, each group of supporting plates 14 comprises two supporting plates 14, one group of supporting plates 14 connect the connecting supporting columns 11 with the edge beam supporting columns 12, the other group of supporting plates 14 connect the connecting supporting columns 11 with the hidden beam supporting columns 13, the two groups of supporting plates 14 are mutually vertical, and a template is formed after the supporting plates 14 are installed;
s2, referring to FIG. 2, binding reinforcing steel bars 4 on a template, wherein the reinforcing steel bars 4 comprise first reinforcing steel bars 41, second reinforcing steel bars 42, third reinforcing steel bars 43 and fourth reinforcing steel bars 44, the first reinforcing steel bars 41, the second reinforcing steel bars 42, the third reinforcing steel bars 43 and the fourth reinforcing steel bars 44 are parallel to each other, one ends of the first reinforcing steel bars 41 close to a connecting support column 11 are fixedly connected to the side beam frame 3, one ends of the second reinforcing steel bars 42 close to the connecting support column 11 are fixedly connected to the connecting support column 11 in an anchoring mode, the third reinforcing steel bars 43 are anchored to the connecting support column 11 and penetrate through the connecting support column 11, one ends of the fourth reinforcing steel bars 44 close to the connecting support column 11 are fixedly installed on the hidden beam frame 2, the hidden beam frame 2 and the side beam frame 3 are both fixed to the support column 1, and the quality of the construction hollow floor system is improved;
referring to fig. 3 and 4, a side beam frame 3 and a hidden beam frame 2 are installed in a template, the side beam frame 3 and the hidden beam frame 2 are perpendicular to each other, one end of the side beam frame 3 is fixedly connected with a side beam support column 12, the other end of the side beam frame 3 is fixedly connected with a connection support column 11, one end of the hidden beam frame 2 is fixedly connected with the connection support column 11, and the other end of the hidden beam frame 2 is fixedly connected with a hidden beam support column 13; the hidden beam frame 2 comprises a first connecting rib 21, a second connecting rib 22 and a third connecting rib 23, the first connecting rib 21, the second connecting rib 22 and the third connecting rib 23 are parallel to each other, and the first connecting rib 21, the second connecting rib 22 and the third connecting rib 23 extend along the length direction of the hidden beam; the hidden beam frame 2 is further provided with a plurality of stirrups 24, the stirrups 24 are parallel to each other, the stirrups 24 are arranged on the first connecting rib 21, the second connecting rib 22 and the third connecting rib 23 in an environment-friendly manner, the first connecting rib 21, the second connecting rib 22 and the third connecting rib 23 are fixedly connected with the stirrups 24 through iron wires, and the stirrups 24 fix the positions of the first connecting rib 21, the second connecting rib 22 and the third connecting rib 23, so that the position of the hidden beam frame 2 is fixed;
s3, pouring concrete into the side beam frame 3 and the hidden beam frame 2, vibrating and compacting, forming a concrete layer after the concrete is cured and air-dried, forming a side beam by the side beam frame 3, and forming a hidden beam by the hidden beam frame 2; when the filling block concrete hollow floor is poured, an inserted vibrator (the diameter of the rod is 30 mm) is adopted for vibrating, so that the concrete is extruded into the bottom of the template.
S4, disassembling the support plate 14, and further disassembling the template to complete construction.
The preparation method of the concrete comprises the following steps:
mixing 65kg of coarse aggregate and 100kg of fine aggregate, stirring, adding 40kg of cement, 7kg of modified basalt fiber, 5kg of modified highland barley fiber prepared in preparation example 1 and 2kg of polyurethane prepared in preparation example 5, and continuously stirring to obtain a stirring material; and adding 8kg of fly ash, 0.3kg of water reducing agent and 25kg of water into the stirred material, and continuously stirring to obtain the concrete.
Examples 2 to 3
A construction method of a cast-in-place reinforced concrete hollow floor system is shown in Table 1, and examples 2-3 are basically the same as example 1 except that in S3, the components for preparing concrete are different in proportion.
TABLE 1
Example 4
A construction method of a cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that modified basalt fibers prepared in the preparation example 1 are equivalently replaced by the modified basalt fibers prepared in the preparation example 2.
Example 5
A construction method of a cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that modified basalt fibers prepared in the preparation example 1 are equivalently replaced by the modified basalt fibers prepared in the preparation example 3.
Example 6
A construction method of a cast-in-place reinforced concrete hollow floor, which is different from the embodiment 3 in that the modified basalt fiber prepared in the preparation example 1 is equivalently replaced by the modified basalt fiber prepared in the preparation example 4.
Example 7
The construction method of the cast-in-place reinforced concrete hollow floor is different from the embodiment 3 in that the modified basalt fiber prepared in the preparation example 1 is equivalently replaced by the basalt fiber sold in the market.
Example 8
The construction method of the cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that the modified highland barley fiber prepared in the preparation example 5 is equivalently replaced by the modified highland barley fiber prepared in the preparation example 6.
Example 9
The construction method of the cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that the modified highland barley fiber prepared in the preparation example 5 is equivalently replaced by the modified highland barley fiber prepared in the preparation example 7.
Example 10
The construction method of the cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that the modified highland barley fiber prepared in the preparation example 5 is equivalently replaced by the modified highland barley fiber prepared in the preparation example 8.
Example 11
The construction method of the cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that the modified highland barley fiber prepared in the preparation example 5 is equivalently replaced by the commercially available highland barley fiber.
Example 12
The construction method of the cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that the input amount of the modified basalt is 7.2kg, the input amount of the modified highland barley fiber is 5.6kg, and the input amount of the polyurethane is 2.5kg.
Example 13
The construction method of the cast-in-place reinforced concrete hollow floor system is different from the embodiment 3 in that the input amount of the modified basalt is 7.4kg, the input amount of the modified highland barley fiber is 5.8kg, and the input amount of the polyurethane is 2.5kg.
Example 14
The construction method of the cast-in-place reinforced concrete hollow floor is different from the embodiment 1 in that polyurethane is equivalently replaced by epoxy resin.
Example 15
A construction method of a cast-in-place reinforced concrete hollow floor system is different from the embodiment 1 in that the modified basalt fiber prepared in the preparation embodiment 1 is equivalently replaced by the basalt fiber sold in the market, and the modified highland barley fiber prepared in the preparation embodiment 5 is equivalently replaced by the highland barley fiber sold in the market.
Example 16
The construction method of cast-in-place reinforced concrete hollow floor is different from that of the embodiment 1 in that polyurethane is not added.
Performance detection test:
and (3) testing the compression resistance: the concrete prepared in the examples 1 to 16 is detected according to the detection standard of GB/T50081-2019 'test method standard for physical and mechanical properties of concrete', and the 7d compressive strength (MPa) and the 28d compressive strength (MPa) of the concrete are detected.
And (3) testing the corrosion resistance: concrete prepared in examples 1 to 16 was cured for 28 days, soaked in a 5% sodium sulfate solution, and tested for compressive strength (MPa) after soaking for 15 hours, according to the test standards of GB/T50082-2009, test method standards for testing the long-term performance and durability of ordinary concrete.
The specific results are shown in table 2:
according to the comparison of the data of the embodiments 1-3 and the data of the embodiments 14-16, the modified basalt fiber, the modified highland barley fiber and the polyurethane are matched together, so that the compression resistance of the concrete can be effectively improved; the three components are uniformly dispersed in the concrete mixture and coated on the surfaces of the coarse aggregate and the fine aggregate, and meanwhile, the cement is coated on the modified basalt fiber and the modified highland barley fiber, so that gaps among the components in the concrete are reduced, the compressive strength of the concrete is further improved, and the compressive performance of the hollow floor can be improved by the concrete poured during construction.
According to the comparison of the data of the embodiments 3 to 7, the basalt fiber is modified, the dispersibility of the basalt fiber is improved, the modified basalt fiber is not easy to aggregate in concrete, the section strength of the modified basalt fiber and the concrete mixture is further improved, and the compression resistance of the concrete is further improved.
According to the comparison of the data of the embodiment 3 and the data of the embodiments 8 to 11, the highland barley fiber is modified, the carbon black is attached to the highland barley fiber through acrylic acid and glacial acetic acid, the modified highland barley fiber is applied to concrete to improve the compression resistance of the concrete, and the carbon black and the highland barley fiber attached to the highland barley fiber are filled into the micropores of the coarse aggregate and the fine aggregate to effectively prevent the sulfate in the outside from invading the concrete to further improve the corrosion resistance of the concrete.
According to the comparison of the data of the embodiment 3 and the data of the embodiments 12 to 13, when the modified basalt fiber, the modified highland barley fiber and the polyurethane are in a specific mass ratio, the modified basalt fiber, the modified highland barley fiber and the polyurethane can fill the gap between the coarse aggregate and the fine aggregate, so that the connection strength between various raw materials is improved, the sulfate which is easy to corrode the concrete is not easy to enter the concrete, and the compression strength and the corrosion resistance of the concrete are further improved.
The specific embodiments are merely illustrative of the present application and are not restrictive of the present application, and those skilled in the art can make modifications of the embodiments as required without any inventive contribution thereto after reading the present specification, but only protected by the patent laws within the scope of the claims of the present application.
Claims (10)
1. A construction method of a cast-in-place reinforced concrete hollow floor is characterized in that: the method comprises the following steps:
s1, installing a support plate (14) and a support column (1) to obtain a template;
s2, binding reinforcing steel bars (4) on the template, and installing a side beam frame (3) and a hidden beam frame (2) to form a supporting seat;
s3, pouring concrete and vibrating to compact, and curing and air-drying the concrete to form a concrete layer;
s4, disassembling the recovery template to finish construction;
the hidden beam frame (2) comprises a first connecting rib (21), a second connecting rib (22) and a third connecting rib (23); first splice bar (21), second splice bar (22) and third splice bar (23) are parallel to each other and follow the length direction of dark roof beam frame (2) extends, first splice bar (21), second splice bar (22) and third splice bar (23) are close to the one end of boundary beam with the distance of boundary beam frame (3) is arranged in proper order from far away and nearly.
2. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 1, wherein: the hidden beam frame (2) is provided with a hoop (24), and the hoop (24) surrounds the first connecting rib (21), the second connecting rib (22) and the third connecting rib (23).
3. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 1, wherein: the reinforcing steel bars (4) comprise a first reinforcing steel bar (41), a second reinforcing steel bar (42), a third reinforcing steel bar (43) and a fourth reinforcing steel bar (44); the first steel bar (41) is fixedly connected to the side beam frame (3); the second steel bar (42) is anchored and connected to the supporting column (1); the third steel bar (43) is mounted in an anchoring manner and penetrates through the support column (1); the fourth steel bar (44) is fixedly connected to the hidden beam frame (2).
4. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 1, wherein: the concrete layer comprises concrete, and the concrete is prepared from the following raw materials in parts by weight: coarse aggregate: 650-750 parts; fine aggregate: 1000-1100 parts; cement: 400-500 parts; fly ash: 80-120 parts; water: 250-350 parts; modified basalt fiber: 70-80 parts; modifying the highland barley fiber: 50-60 parts; polyurethane: 20-30 parts of a solvent; water reducing agent: 3-7 parts; other auxiliary agents: 0-6 parts.
5. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 4, wherein: the preparation method of the modified basalt fiber comprises the following steps: mixing 10-20 parts by weight of polyvinyl chloride and 20-30 parts by weight of guar gum, adding 5-15 parts by weight of N-methylpyrrolidone and 10-20 parts by weight of basalt fiber while heating, uniformly stirring, and cooling to obtain the modified basalt fiber, wherein the weight ratio of the polyvinyl chloride to the guar gum to the N-methylpyrrolidone is (1.2-1.5): (2.6-2.8): 1.
6. the construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 4, wherein: the preparation method of the modified highland barley fiber comprises the following steps: mixing and stirring 10-20 parts by weight of highland barley fiber, 5-9 parts by weight of carbon black and 10-20 parts by weight of acrylic acid, standing, adding 5-10 parts by weight of glacial acetic acid, uniformly stirring, filtering, and drying to obtain the modified highland barley fiber, wherein the weight ratio of the carbon black to the acrylic acid to the glacial acetic acid is 1: (3.2-3.6): (1.2-1.4).
7. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 4, wherein: the other auxiliary agent comprises one of triethanolamine and calcium acetate.
8. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 4, wherein: the weight ratio of the modified basalt fiber to the modified highland barley fiber to the polyurethane is (2.8-3): (2.2-2.4): 1.
9. the construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 4, wherein: the water reducing agent comprises one of lignosulfonate water reducing agent, polycarboxylate high-efficiency water reducing agent and naphthalene high-efficiency water reducing agent.
10. The construction method of the cast-in-place reinforced concrete hollow floor as claimed in claim 4, wherein the construction method comprises the following steps: the preparation method of the concrete comprises the following steps: mixing and stirring the coarse aggregate and the fine aggregate, adding cement, modified basalt fiber, modified highland barley fiber and polyurethane, and continuously stirring to obtain a stirring material; adding the fly ash, the water reducing agent, other additives and water into the stirring material, and continuously stirring to obtain the concrete.
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