CN115557761B - Crack-resistant ground structure and preparation method thereof - Google Patents
Crack-resistant ground structure and preparation method thereof Download PDFInfo
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- CN115557761B CN115557761B CN202211240620.3A CN202211240620A CN115557761B CN 115557761 B CN115557761 B CN 115557761B CN 202211240620 A CN202211240620 A CN 202211240620A CN 115557761 B CN115557761 B CN 115557761B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000002002 slurry Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229920005610 lignin Polymers 0.000 claims abstract description 29
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 29
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 25
- 235000007164 Oryza sativa Nutrition 0.000 claims abstract description 17
- 235000009566 rice Nutrition 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 238000005336 cracking Methods 0.000 claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 10
- 239000004568 cement Substances 0.000 claims abstract description 9
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 6
- 239000003469 silicate cement Substances 0.000 claims abstract description 6
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000011065 in-situ storage Methods 0.000 claims abstract description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 22
- 241000209094 Oryza Species 0.000 claims description 16
- 239000000395 magnesium oxide Substances 0.000 claims description 12
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 12
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 12
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 11
- 239000010410 layer Substances 0.000 claims description 11
- 239000002344 surface layer Substances 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical group [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- 238000001035 drying Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000012670 alkaline solution Substances 0.000 claims description 5
- 239000002270 dispersing agent Substances 0.000 claims description 5
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical group CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 4
- 239000003792 electrolyte Substances 0.000 claims description 4
- 235000010413 sodium alginate Nutrition 0.000 claims description 4
- 229940005550 sodium alginate Drugs 0.000 claims description 4
- 239000000661 sodium alginate Substances 0.000 claims description 4
- 150000001720 carbohydrates Chemical class 0.000 claims description 3
- 230000007935 neutral effect Effects 0.000 claims description 3
- CHWRSCGUEQEHOH-UHFFFAOYSA-N potassium oxide Chemical compound [O-2].[K+].[K+] CHWRSCGUEQEHOH-UHFFFAOYSA-N 0.000 claims description 3
- 229910001950 potassium oxide Inorganic materials 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 4
- 239000006185 dispersion Substances 0.000 abstract description 5
- 230000006355 external stress Effects 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 240000007594 Oryza sativa Species 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 5
- 239000004570 mortar (masonry) Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 4
- 230000036571 hydration Effects 0.000 description 4
- 238000006703 hydration reaction Methods 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000010903 husk Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B24/00—Use of organic materials as active ingredients for mortars, concrete or artificial stone, e.g. plasticisers
- C04B24/40—Compounds containing silicon, titanium or zirconium or other organo-metallic compounds; Organo-clays; Organo-inorganic complexes
- C04B24/42—Organo-silicon compounds
- C04B24/425—Organo-modified inorganic compounds, e.g. organo-clays
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/60—Flooring materials
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Dispersion Chemistry (AREA)
- Civil Engineering (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a preparation method of an anti-cracking ground structure, wherein concrete slurry self-levels in a template plane space under the action of dead weight during pouring, and the concrete slurry comprises the following substances: silicate cement, sulphoaluminate cement, sand, hydrophilic flaky flexible biological aggregate with a water guide network, a water reducing agent, an expanding agent and an alkaline substance for adjusting the concrete slurry to be alkaline; the flexible biological aggregate in the concrete slurry is a composition of lignin and silicon dioxide, and the lignin and the silicon dioxide keep an in-situ connection structure in the rice hulls; hydroxyl groups are connected with lignin and silicon dioxide; wherein lignin and silicon dioxide of the flexible biological aggregate are dispersed in the slurry to form a cementing network in the concrete setting process; according to the invention, the flexible biological skeleton which is dispersed in the slurry space along with the water in the slurry is utilized to form penetration of the ground structure, so that effective dispersion of external stress is formed, and the crack resistance of the ground structure is improved.
Description
Technical Field
The invention relates to the technical field of concrete, in particular to an anti-cracking ground structure and a preparation method thereof.
Background
GB50209 specifies that the flatness deviation of the integral surface layer of the fine stone concrete is 5mm according to the specification of acceptance of construction quality of building ground engineering, namely 5.1.7, and the integral surface layer of the fine stone concrete floor is formed by integral construction manually and once, and is very difficult to achieve the flatness of 1mm accurately in a specified range exceeding the specification of 5 mm. There are many reasons for the low flatness of the ground, and the reduction of the flatness may be caused by the larger aggregate particles; the concrete mortar has the advantages that the concrete mortar can be sucked when the existing concrete mortar is poured in, the cement ratio of the concrete mortar is destroyed, the stability can be changed, the solidified ground is high in strength at some positions and low in strength at some positions, and the phenomenon of potholes is easy to occur when the concrete mortar is used.
Disclosure of Invention
The invention aims to provide a preparation method of an anti-cracking ground structure, which utilizes a flexible biological skeleton dispersed in slurry space along with water in slurry to form penetration of the obtained ground structure, so as to form effective dispersion of external stress and improve the anti-cracking performance of the ground structure.
In order to solve the technical problem, the technical scheme of the invention is as follows: the preparation method of the anti-cracking ground structure comprises the following steps of:
silicate cement, sulphoaluminate cement, sand, hydrophilic flaky flexible biological aggregate with a water guide network, a water reducing agent, an expanding agent and an alkaline substance for adjusting the concrete slurry to be alkaline;
the flexible biological aggregate in the concrete slurry is a composition of lignin and silicon dioxide, and the lignin and the silicon dioxide keep an in-situ connection structure in the rice hulls;
the pouring process is to uniformly disperse water in concrete slurry or water in external environment through lignin in sheet-shaped flexible biological aggregate as a water guide network;
hydroxyl groups are connected with lignin and silicon dioxide;
wherein lignin and silica of the flexible biological aggregate are dispersed in the slurry to form a cementitious network during concrete setting.
Preferably, the concrete slurry comprises the following materials in parts by weight:
the concrete slurry forms a ground structure, has certain requirements on the flatness of the obtained surface layer, reduces the use of rigid aggregate, and is replaced by flaky flexible biological aggregate which can be dissolved in an alkaline solution system, the flexible biological aggregate forms a uniform and continuously distributed cementing network along with water in the system, the continuity of an internal structure is increased due to the existence of the continuous flexible biological aggregate between the whole structure after the surface layer structure is coagulated, and once the surface layer structure is subjected to external action with larger injury, cracks are difficult to develop due to the obstruction of the continuous network, so that the crack resistance of the ground is formed.
Preferably, the alkaline substance is sodium hydroxide or potassium oxide. The alkaline substance is easy to dissolve, so that an alkaline solution is formed to dissolve the flexible biological skeleton, and the fluidity of the obtained concrete slurry and the stability after coagulation and drying are improved.
Preferably, the preparation method of the flexible biological aggregate comprises the following steps:
step one, cleaning rice hulls with sheet structures, and drying;
step two, placing the dried rice hulls in 1M hydrochloric acid or sulfuric acid to remove carbohydrate in the rice hulls, keeping the rice hulls to have a connection structure of lignin and silicon dioxide, cleaning to be neutral, and drying; obtaining the flexible biological aggregate dissolved in the alkaline solution. The invention effectively maintains the flaky connection structure of lignin and silicon dioxide, and is used as a cementing network for carrying out flaky partition positioning. The silica of each flexible biological aggregate connected with lignin also participates in the hydration of cement to form hydrated calcium silicate and the like, and the lignin connected with the silica is utilized to strengthen the internal connection of the surface layer structure, so that the crack resistance of the obtained ground structure is improved. The condensation and drying process of the ground structure is that SiO in sol 2 The particles aggregate with each other and coagulate; when the concentration of the silica sol is increased due to the gradual decrease of the water content, the collision probability among colloid particles is increased, and the particles are more easy to be mutually adhered and aggregated.
Preferably, the concrete paste further includes 2 to 5 parts by mass of an electrolyte having a chain structure as a dispersant. According to the invention, the chain structure of the dispersing agent is matched with the flaky flexible biological skeleton to be matched with the silicon dioxide contained in the flaky structure to disperse, meanwhile, the chain electrolyte realizes the effect of forming steric hindrance on local electrostatic induction of the flaky flexible biological skeleton, charges with the same electrical property are induced by utilizing static electricity, materials repel each other due to the same electrical property, the mutual obstruction of the materials is formed, the sedimentation and layering of particles with larger mass in the slurry are prevented, and the defects of hollowness and the like are reduced.
Preferably, the dispersing agent is sodium alginate. The sodium alginate has a chain structure, is suitable for being matched with flaky flexible biological aggregate in a space range, is favorable for dispersing moisture, is realized in a certain space region by utilizing electrostatic induction of charges of electrolyte, and is favorable for uniform dispersion and stability of slurry.
Preferably the expanding agent comprises magnesium oxide and nano calcium carbonate; the mass ratio of the two is (2-3): (1-2). The invention limits the mass ratio of magnesium oxide and nano calcium carbonate, improves the stability of the obtained slurry, and is beneficial to the formation of ground structures.
The invention further aims to provide an anti-cracking ground structure, which is formed by self-leveling of concrete slurry, and is simple and convenient in preparation method, flat in surface and improved in mechanical property.
In order to solve the technical problem, the technical scheme of the invention is as follows: the invention provides a ground structure prepared by a preparation method.
Preferably, the ground structure is one of the surface layers of the floor surfaces in a factory building, a warehouse and an underground garage;
or a leveling layer of the floor coating surface layer.
Preferably the thickness of the facing or screed is less than 20mm.
By adopting the technical scheme, the invention has the beneficial effects that:
compared with the prior art that short fibers are added into the concrete in order to improve the strength of the ground structure, the concrete slurry self-leveling method utilizes the dead weight effect in the plane space of the template during pouring, and under the action of the internal force of the concrete, the short fibers have the effects of large tensile strength and bending strength at the initial stage of loading, so that the toughness of the concrete is greatly improved. The traditional anti-cracking measure is to add a steel wire mesh to improve the shrinkage crack and the plastic crack of the concrete, and CN106565158B proposes to add fibers into the concrete to replace the steel bar mesh, and simultaneously ensure the mechanical strength;
according to the invention, silicate cement, sulphoaluminate cement, silicon dioxide, calcium oxide, magnesium oxide, aluminum oxide and other substances in sand and silicon dioxide on flexible biological aggregate form hydration to construct an integrated structure, the regularly connected silicon dioxide on flexible biological aggregate lignin is matched with the hydration process of cement to obtain internal network connection of a ground structure, and the flexible biological skeleton is taken as a basic connection unit to be further combined with the hydration of the concrete slurry to develop a structural layer with a complete connection network inside; hydroxyl groups are connected to the sheet-shaped flexible biological aggregate lignin and the silicon dioxide, water in the slurry is dispersed, and a cementing network in the concrete coagulation process is formed in the slurry;
when water on the ground is accumulated in the construction process or the concrete slurry is diluted by adding water for cooperation construction, water from different sources can easily pass through hydrophilic lignin and silicon dioxide of flexible biological aggregate in the slurry to form a water dispersion path in a dispersing way when contacting the slurry prepared by the invention, and the slurry is stable and good in binding force, so that the crack-resistant ground layer and the bottom layer where the crack-resistant ground layer is positioned are prevented from being easily layered, and hollowness and cracks are avoided;
after the construction is completed and solidified, the slurry has small rigid aggregate consumption and small dry density, and even if materials such as an anti-cracking steel mesh are not used, good crack resistance is still maintained, and the problem of dust and sand generation caused by the sinking of the aggregate in the obtained ground structure is avoided.
Detailed Description
In order to further explain the technical scheme of the invention, the invention is explained in detail by specific examples.
Example 1
The embodiment discloses a preparation method of flexible biological aggregate, which comprises the following steps:
step one, cleaning rice hulls with sheet structures, and drying;
step two, placing the dried rice hulls in 1M hydrochloric acid or sulfuric acid to remove carbohydrate in the rice hulls, keeping the rice hulls to have a connection structure of lignin and silicon dioxide, cleaning to be neutral, and drying;
wherein the solid-liquid ratio of the rice husk to the hydrochloric acid or sulfuric acid is 1:10, and the water bath is carried out at 55 ℃ for 8 hours.
Obtaining the flexible biological aggregate dissolved in the alkaline solution.
Example 2
The embodiment discloses a preparation method of crack-resistant ground structure, and concrete slurry is self-leveling in a template plane space through dead weight effect when pouring, and the concrete slurry comprises the following substances:
silicate cement, sulphoaluminate cement, sand, the sheet-shaped flexible biological aggregate with water-guiding network, which is hydrophilic and is prepared in the embodiment 1, a water reducing agent, an expanding agent and an alkaline substance for adjusting the concrete slurry to be alkaline;
the flexible biological aggregate in the concrete slurry is a composition of lignin and silicon dioxide, and the lignin and the silicon dioxide keep an in-situ connection structure in the rice hulls; the pouring process is to uniformly disperse water in concrete slurry or water in an external construction environment through lignin in sheet-shaped flexible biological aggregate as a water guide network; hydroxyl groups are connected with lignin and silicon dioxide; wherein lignin and silica of the flexible biological aggregate are dispersed in the slurry to form a cementitious network during concrete setting.
The mass parts of the materials in the concrete slurry in this example are shown in table 1.
The alkaline substance is sodium hydroxide or potassium oxide.
The expanding agent in the embodiment comprises magnesium oxide and nano calcium carbonate, wherein the mass ratio of the magnesium oxide to the nano calcium carbonate is 2:1.
Example 3
The main difference between this embodiment and embodiment 2 is that:
the component amounts of the raw materials are shown in table 1;
the expanding agent in the embodiment comprises magnesium oxide and nano calcium carbonate, and the mass ratio of the magnesium oxide to the nano calcium carbonate is 1:1.
Example 4
The main difference between this embodiment and embodiment 2 is that:
the component amounts of the raw materials are shown in table 1;
the expanding agent in the embodiment comprises magnesium oxide and nano calcium carbonate, and the mass ratio of the magnesium oxide to the nano calcium carbonate is 1:1.
Example 5
The main difference between this embodiment and embodiment 2 is that:
the component amounts of the raw materials are shown in table 1;
the expanding agent in the embodiment comprises magnesium oxide and nano calcium carbonate, wherein the mass ratio of the magnesium oxide to the nano calcium carbonate is 3:2.
Table 1 concrete paste compositions (parts by mass) obtained in examples 2 to 5
| Project | Example 2 | Example 3 | Example 4 | Example 5 |
| Portland cement | 180 | 220 | 250 | 200 |
| Sulphoaluminate waterMud | 160 | 140 | 120 | 150 |
| Sand and sand | 40 | 50 | 60 | 70 |
| Flexible biological aggregate | 5 | 10 | 15 | 20 |
| Water reducing agent | 5 | 10 | 15 | 10 |
| Expanding agent | 35 | 15 | 25 | 20 |
| Alkaline substance | 30 | 10 | 20 | 20 |
| Water and its preparation method | 100 | 110 | 120 | 130 |
| Sodium alginate | 2 | 2 | 5 | 5 |
Comparative example
The main differences between this comparative example and example 4 are as follows:
the concrete slurry comprises the following materials in parts by mass:
for the concrete cube structures of different sizes of the slurries obtained in examples 2 to 5 and comparative examples, the elastic modulus, the cube compressive strength and the splitting tensile strength of the concrete for 28 days were tested and determined by referring to GB/T50081-2019, the elastic modulus test block sizes being 150mm×150mm×300mm, the cube compressive strength and the splitting tensile strength test block sizes being 150mm×150mm, and specific numerical indexes are shown in Table 2 in detail.
Table 2 mechanical properties index of cube structures obtained for slurries of examples 2 to 5
| Project | Elastic modulus/GPa | Compressive Strength/MPa | Split tensile strength/MPa |
| Example 2 | 21.2 | 41.2 | 3.00 |
| Example 3 | 21.8 | 41.9 | 3.12 |
| Example 4 | 24.5 | 45.6 | 3.56 |
| Example 5 | 22.3 | 43.8 | 3.28 |
| Comparative example | 19.6 | 35.5 | 2.26 |
The mechanical property of the concrete obtained by the invention is remarkable, and the polypropylene fiber is used for improving the bending resistance in the comparative example, so that the concrete obtained by the invention has excellent crack resistance, the fluidity is 235mm to 245mm, and meanwhile, the flatness of the ground base layer requires an error within two meters of +/-2 mm.
When water on the ground is accumulated in the construction process or the concrete slurry is diluted by adding water for cooperation construction, water from different sources can easily pass through hydrophilic lignin and silicon dioxide of flexible biological aggregate in the slurry to form a water dispersion path in a dispersing way when contacting the slurry prepared by the invention, and the slurry is stable and good in binding force, so that the crack-resistant ground layer and the bottom layer where the crack-resistant ground layer is positioned are prevented from being easily layered, and hollowness and cracks are avoided; after the construction is completed and solidified, the slurry has small rigid aggregate consumption and small dry density, and even if materials such as an anti-cracking steel mesh are not used, good crack resistance is still maintained, and the problem of dust and sand generation caused by the sinking of the aggregate in the obtained ground structure is avoided.
Claims (8)
1. A preparation method of an anti-cracking ground structure is characterized by comprising the following steps: the concrete slurry self-levels in the template plane space under the action of dead weight during pouring, and the concrete slurry comprises the following substances:
silicate cement, sulphoaluminate cement, sand, hydrophilic flaky flexible biological aggregate with a water guide network, a water reducing agent, an expanding agent and an alkaline substance for adjusting the concrete slurry to be alkaline;
the flexible biological aggregate in the concrete slurry is a composition of lignin and silicon dioxide, and the lignin and the silicon dioxide keep an in-situ connection structure in the rice hulls;
the pouring process is to uniformly disperse water in concrete slurry or water in external environment through lignin in sheet-shaped flexible biological aggregate as a water guide network;
hydroxyl groups are connected with lignin and silicon dioxide;
wherein lignin and silicon dioxide of the flexible biological aggregate are dispersed in the slurry to form a cementing network in the concrete setting process;
the preparation method of the flexible biological aggregate comprises the following steps:
step one, cleaning rice hulls with sheet structures, and drying;
step two, placing the dried rice hulls in 1M hydrochloric acid or sulfuric acid to remove carbohydrate in the rice hulls, keeping the rice hulls to have a connection structure of lignin and silicon dioxide, cleaning to be neutral, and drying;
obtaining flexible biological aggregate dissolved in alkaline solution;
the concrete slurry comprises the following materials in parts by mass:
180-250 parts of silicate cement;
120 to 160 parts of sulphoaluminate cement;
40 to 70 parts of sand;
5 to 20 parts of flexible biological aggregate;
5 to 15 parts of water reducer;
15 to 35 parts of an expanding agent;
10 to 30 parts of alkaline substance;
100 to 130 parts of water.
2. The method of manufacturing according to claim 1, wherein: the alkaline substance is sodium hydroxide or potassium oxide.
3. The method of manufacturing according to claim 1, wherein: the concrete paste further includes 2 to 5 parts by mass of an electrolyte having a chain structure as a dispersant.
4. A method of preparation as claimed in claim 3, wherein:
the dispersing agent is sodium alginate.
5. The method of manufacturing according to claim 1, wherein:
the expanding agent comprises magnesium oxide and nano calcium carbonate;
the mass ratio of the two is (2-3): (1-2).
6. A floor structure produced by the production method according to any one of claims 1 to 5.
7. The floor structure of claim 6, wherein:
the ground structure is one of ground surface layers in a factory building, a warehouse or an underground garage;
or a leveling layer of the floor coating surface layer.
8. The floor structure of claim 7, wherein: the thickness of the facing or leveling layer is less than 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211240620.3A CN115557761B (en) | 2022-10-11 | 2022-10-11 | Crack-resistant ground structure and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211240620.3A CN115557761B (en) | 2022-10-11 | 2022-10-11 | Crack-resistant ground structure and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142472A (en) * | 1996-04-30 | 1997-02-12 | 交通部公路科学研究所 | Rice-hull cement concrete |
| WO2002006182A1 (en) * | 2000-07-14 | 2002-01-24 | Davco Construction Materials Pty Limited | Mortar composition and method |
| CN102674778A (en) * | 2012-06-04 | 2012-09-19 | 同济大学 | Self-leveling mortar doped with low-temperature rice hull ash |
| CN106750584A (en) * | 2016-11-24 | 2017-05-31 | 吉林大学 | A kind of method of the composite modified natural rubber masterbatch of lignin silica |
| CN114084891A (en) * | 2021-11-26 | 2022-02-25 | 黑龙江省公路建设中心 | Rice hull ash and preparation method and application thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10023497B2 (en) * | 2016-06-07 | 2018-07-17 | Council Of Scientific & Industrial Research | Multifunctional material for workability of geopolymeric system and its process thereof |
-
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- 2022-10-11 CN CN202211240620.3A patent/CN115557761B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142472A (en) * | 1996-04-30 | 1997-02-12 | 交通部公路科学研究所 | Rice-hull cement concrete |
| WO2002006182A1 (en) * | 2000-07-14 | 2002-01-24 | Davco Construction Materials Pty Limited | Mortar composition and method |
| CN102674778A (en) * | 2012-06-04 | 2012-09-19 | 同济大学 | Self-leveling mortar doped with low-temperature rice hull ash |
| CN106750584A (en) * | 2016-11-24 | 2017-05-31 | 吉林大学 | A kind of method of the composite modified natural rubber masterbatch of lignin silica |
| CN114084891A (en) * | 2021-11-26 | 2022-02-25 | 黑龙江省公路建设中心 | Rice hull ash and preparation method and application thereof |
Non-Patent Citations (4)
| Title |
|---|
| 傅德海等."干粉砂浆应用指南".中国建材工业出版社,2006,(第1版),第73页. * |
| 冶金工业部建筑研究总院."1955-1985科技成果选编 冶金渣综合利用专辑".1985,第33-34页. * |
| 刘连新等."高原环境建筑材料".中国建材工业出版社,2010,(第1版),第151页. * |
| 稻壳砂浆力学性能研究;贺大荣等;《新型建筑材料》;第47卷(第06期);第19-21、58页 * |
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