CN114988808B - Foam concrete slab capable of replacing traditional brick moulding bed and preparation method and application thereof - Google Patents
Foam concrete slab capable of replacing traditional brick moulding bed and preparation method and application thereof Download PDFInfo
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- CN114988808B CN114988808B CN202210684896.4A CN202210684896A CN114988808B CN 114988808 B CN114988808 B CN 114988808B CN 202210684896 A CN202210684896 A CN 202210684896A CN 114988808 B CN114988808 B CN 114988808B
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- 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
- C04B28/04—Portland cements
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
- C04B18/08—Flue dust, i.e. fly ash
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/141—Slags
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- 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
- C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
- C04B18/04—Waste materials; Refuse
- C04B18/14—Waste materials; Refuse from metallurgical processes
- C04B18/146—Silica fume
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- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
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- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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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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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses a foam concrete slab capable of replacing a traditional brick bed-jig and a preparation method and application thereof. The foam concrete slab capable of replacing the traditional brick bed-jig comprises the following components: 330-562kg/m of cement 3 Active admixture 0-241kg/m 3 180-321kg/m of water 3 Foaming agent 0.06-0.09kg/m 3 Water reducing agent 0.24-0.40kg/m 3 0.46-2.76kg/m of fiber 3 And 1 piece of reinforcing mesh. The foam concrete slab capable of replacing the traditional brick bed-jig provided by the invention has the advantages of controllable density, standard strength, simple production, effective improvement of construction simplicity and safety, shortened construction period, cost saving and the like.
Description
Technical Field
The invention relates to the technical field of buildings, in particular to a foam concrete slab capable of replacing a traditional brick bed-jig and a preparation method and application thereof.
Background
Some concrete members of modern building foundation parts, such as side forms of foundation beams, bearing platforms, raft boards, water collection pits and the like, are not easy to disassemble, and bricks or building blocks are generally required to be built into brick bed-jig to replace wood forms or steel forms which cannot be applied to support the forms. The materials and construction process used for the brick bed mould determine that it has a number of disadvantages. Firstly, if the height of a poured foundation beam or bearing platform is large, the amount of earth backfilling needed to be carried out after the brick moulding bed is built is large, so that the brick moulding bed is easy to damage and deform during backfilling and tamping; in addition, if the periphery of the brick bed die is not supported by earthwork, the side pressure born by the brick bed die mainly comes from the flowable concrete during pouring, and the brick bed die is easy to expand and deform outwards due to the vibration force of the vibrating rod, so that the loss of the concrete can be increased, and the concrete member looks irregular; in addition, the brick moulding bed needs manual site masonry construction, the engineering amount is large, the labor cost required to be input is large, and the quality control is unstable, which is also the reason for long construction period, high cost and high risk.
At present, prefabricated cement laths are used for replacing brick moulding bed to accelerate engineering progress, and the method has the advantages of achieving a certain effect and effectively shortening construction period, but also has a plurality of difficulties: firstly, the cement board is very thick and heavy, the construction site needs mechanical hoisting construction, and the installation is troublesome; secondly, the general specification and the size of the prefabricated cement board are fixed, so that the prefabricated cement board needs to be cut and sheared frequently during installation, the same difficulty is high, the loss and the waste of materials can be caused, and the cost is increased.
Accordingly, the prior art is still in need of improvement and development.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a foam concrete slab capable of replacing a traditional brick bed-jig, and a preparation method and application thereof, and aims to solve the problems that the installation is troublesome and the cost is high when the traditional precast cement lath replaces the brick bed-jig.
The technical scheme of the invention is as follows:
according to a first aspect of the invention, a foam concrete slab capable of replacing a traditional brick bed-jig is provided, wherein the foam concrete slab comprises the following components:
330-562kg/m of cement 3 Active admixture 0-241kg/m 3 180-321kg/m of water 3 Foaming agent 0.06-0.09kg/m 3 Water reducing agent 0.24-0.40kg/m 3 0.46-2.76kg/m of fiber 3 And 1 piece of reinforcing mesh.
Optionally, the preparation method comprises the following steps:
454-529kg/m of cement 3 Active admixture 114-226kg/m 3 227-302kg/m of water 3 Foaming agent 0.06-0.08kg/m 3 Water reducing agent 0.28-0.38kg/m 3 0.92-2.76kg/m of fiber 3 And 1 piece of reinforcing mesh.
Optionally, the cement is one or more of silicate cement, ordinary silicate cement and sulphoaluminate cement.
Optionally, the active admixture is one or more of fly ash, slag powder and silica fume.
Optionally, the water reducer is one or more of polycarboxylate water reducer, naphthalene sulfonate water reducer, calcium lignosulfonate water reducer and sulfamate high-efficiency water reducer.
Optionally, the fiber is one or more of polypropylene fiber, alkali-resistant glass fiber, polyvinyl alcohol fiber, polyurethane fiber and polyimide fiber.
Optionally, the wire diameter of the reinforcing mesh is 3-5mm, and the mesh diameter is 10-20cm.
Optionally, the density of the foam concrete slab is 500-850kg/m 3 Between them.
According to a second aspect of the invention, there is provided a method for preparing a foam concrete slab capable of replacing a conventional brick bed-jig according to the invention, comprising the following steps:
adding cement, active admixture and fiber into a special mixer for foam concrete or a single horizontal shaft mixer, and stirring to obtain powdery cement-based inorganic cementing material;
mixing water and a water reducing agent, stirring, pouring the mixture into the powdery cement-based inorganic cementing material, and stirring to obtain cement-based inorganic cementing material slurry;
foaming a foaming agent in a physical foaming mode through a foaming machine to obtain foam, pouring the foam while stirring the cement-based inorganic cementing material slurry, and stirring to obtain foam concrete slurry;
pouring the foam concrete slurry into a mould provided with a reinforcing mesh, scraping the surface, tightly covering with a preservative film, and removing the mould after curing to obtain the foam concrete slab.
Optionally, the curing temperature is 20+/-5 ℃, and the curing time is more than 24 hours.
In a third aspect of the invention there is provided the use of a foamed concrete panel according to the invention as a building foundation moulding bed.
Compared with the prior art, the invention has the following technical advantages:
1. the density of the prepared foam concrete slab can be 500-850kg/m according to the actual requirements of engineering projects 3 The foam concrete slab in the density range is light in weight and can be manually carried, crane assistance is not needed, the installation and construction procedures are greatly simplified, and the installation cost is saved;
2. the foam concrete slab has good mechanical property and standard strength, and ensures that the die explosion condition can not occur in the concrete pouring process after the die is supported;
3. the foam concrete slab is simple to produce, can be directly poured and molded, and does not need special maintenance conditions for molding;
4. the foam concrete slab has the advantages that the foam concrete slab is light in weight and simple to cut, the installation and construction procedures can be simplified, the on-site operation time of workers is shortened, and the construction safety is improved;
5. the foam concrete slab can be prefabricated in advance in a factory, the process of waiting for a previous process is not needed, the installation is quick and short in period, the process of waiting for the brick masonry to reach the preset strength like a traditional brick moulding bed after the installation is needed, or the process of waiting for the joint mortar to harden like a prefabricated cement slat can effectively save time before, during and after the construction, and the construction period is greatly shortened as a whole;
6. the foam concrete slab has the advantages that the raw materials are simple and easy to obtain, part of cement is replaced by industrial solid waste, the raw material cost is low, the construction period is short, the number of workers required by the same engineering quantity is small, and the cost is effectively reduced from the aspects of raw materials, construction period and manpower;
7. the foam concrete slab has the advantages of simple and easily obtained raw materials, full utilization of industrial solid waste, environmental friendliness, no addition of any harmful solvents, heavy metals and radioactive substances, and no adverse effect on concrete members, soil or surrounding environment after backfilling earthwork.
Detailed Description
The invention provides a foam concrete slab capable of replacing a traditional brick bed-jig, a preparation method and application thereof, and the invention is further described in detail below for making the purposes, technical schemes and effects of the invention clearer and more definite. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a foam concrete slab capable of replacing a traditional brick molding bed, which is prepared from the following components:
330-562kg/m of cement 3 Active admixture 0-241kg/m 3 180-321kg/m of water 3 Hair brushFoaming agent 0.06-0.09kg/m 3 Water reducing agent 0.24-0.40kg/m 3 0.46-2.76kg/m of fiber 3 And 1 piece of reinforcing mesh.
In one embodiment, the foam concrete slab capable of replacing the traditional brick bed-jig is prepared from the following components:
454-529kg/m of cement 3 Active admixture 114-226kg/m 3 227-302kg/m of water 3 Foaming agent 0.06-0.08kg/m 3 Water reducing agent 0.28-0.38kg/m 3 0.92-2.76kg/m of fiber 3 And 1 piece of reinforcing mesh.
At present, most of building foundation moulding bed (parts such as a foundation bearing platform, a foundation beam, a foundation raft, a water collecting pit, an elevator shaft and the like) are brick moulding bed which is built by bricks, and prefabricated hollow cement partition battens or ALC (autoclaved lightweight concrete slabs) are adopted. This example proposes for the first time the use of a foamed concrete slab as a building foundation moulding bed. Foam concrete slabs have significant replacement advantages over the two foregoing. Firstly, compared with the traditional brick moulding bed, the foam concrete slab can be prefabricated and finished in advance in a factory, the installation can be finished quickly after the previous working procedure is finished, the next working procedure can be immediately carried out, the earthwork backfilling and the concrete pouring are carried out, the need of waiting for the formation of masonry strength like the traditional brick moulding bed is avoided, the time, the labor cost and the like are greatly saved, the construction progress is accelerated, and the construction period is shortened; and secondly, compared with prefabricated hollow cement partition boards or ALC boards, the production process of the foam concrete boards is simpler, the required equipment of a production line is less, the investment is small, the quality control is easy, and most importantly, the foam concrete boards can be lighter, are easy to install and carry on site, and greatly lighten the labor intensity.
Foam concrete mix proportion design and density (i.e. foam concrete slab formulation design and density) adjustment method: the density of the foam concrete prepared by the embodiment can be 500-850kg/m according to actual requirements 3 The mixing ratio is freely adjusted, the requirement of light weight and high strength is fully considered on the basis of the existing theory, and compared with other foam concrete, the foam concrete can achieve the purposes of higher strength at the same density level and lower density at the same strength level. Specifically, firstly, according to the original bubbleCalculating the volume of slurry according to the design theory of the mixing ratio of the foam concrete volume method; and then optimizing on the basis of the volume method, keeping the volume of the slurry unchanged, and reversely pushing out the consumption of the cementing material according to the water-gel ratio. In the embodiment, the volume weight of the foam concrete is controlled by replacing the quality of the cementing material with the volume of the slurry, so that the purposes of reducing the water-cement ratio without reducing the volume of the slurry and avoiding the strength reduction of the foam concrete are achieved.
Selection relation of tire membrane height and foam concrete density grade: the foundation bed-jig is only used as a permanent template, the structural safety is not affected, the strength grade is not required to be too high, and on the premise of meeting the strength of the bed-jig, the lower the density of foam concrete is, the lighter the weight of foam concrete slab is, and the simpler and more convenient the field installation construction is. According to the invention, foam concrete with different density grades can be selected according to the heights of foundation bearing platforms, foundation beams and the like on project sites, so that the cost can be reduced to the greatest extent.
In one embodiment, the cement is one or more of Portland cement, sulphoaluminate cement and the like.
In one embodiment, the active admixture is one or more of fly ash, slag powder, silica fume, and the like. The method uses industrial solid waste to replace a part of cement, is environment-friendly, does not add any harmful solvent, heavy metal and radioactive substances, and does not have adverse effect on the surrounding environment.
In one embodiment, the water reducing agent is one or more of polycarboxylate water reducing agent, naphthalene sulfonate water reducing agent, calcium lignosulfonate water reducing agent, sulfamate high-efficiency water reducing agent and the like.
In one embodiment, the fiber is one or more of polypropylene fiber, alkali-resistant glass fiber, polyvinyl alcohol fiber, polyurethane fiber and polyimide fiber.
In one embodiment, the mesh size of the reinforcing mesh is 3-5mm and the mesh size is 10-20cm.
In one embodiment, the density of the foamed concrete slab is in the range of 500-850kg/m 3 Between them.
The embodiment of the invention provides a preparation method of a foam concrete slab capable of replacing a traditional brick bed-jig, which comprises the following steps of:
adding cement, active admixture and fiber into a special mixer for foam concrete or a single horizontal shaft mixer, and stirring to obtain powdery cement-based inorganic cementing material;
mixing water and a water reducing agent, stirring, pouring the mixture into the powdery cement-based inorganic cementing material, and stirring to obtain cement-based inorganic cementing material slurry;
foaming a foaming agent in a physical foaming mode through a foaming machine to obtain foam, pouring the foam while stirring the cement-based inorganic cementing material slurry, and stirring to obtain foam concrete slurry;
pouring the foam concrete slurry into a mould provided with a reinforcing mesh, scraping the surface, tightly covering with a preservative film, and removing the mould after curing to obtain the foam concrete slab.
In this embodiment, the foam is obtained by fully foaming the foaming agent in a physical foaming form by a foaming machine. In one embodiment, the foaming agent is a nano foaming agent, and the main components of the foaming agent are sodium dodecyl sulfate, inorganic nano particles and the like.
In one embodiment, the curing is at a temperature of 15-25 ℃, and the curing time is more than 24 hours, further 24-48 hours, such as 24 hours.
The embodiment of the invention provides an application of the foam concrete slab as a building foundation tire membrane.
The invention is further illustrated by the following specific examples.
Example 1
The foam concrete slab is prepared from the following raw materials in proportion:
example 2
The foam concrete slab is prepared from the following raw materials in proportion:
the foam concrete slabs of examples 1-2 were prepared as follows:
sequentially adding cement, active admixture and fiber into a special mixer for foam concrete, and fully and uniformly mixing to obtain a powdery cement-based inorganic cementing material;
the water required by the method is measured according to the proportion, the water reducer is added and stirred uniformly, and then the mixture is poured into the powdery cement-based inorganic cementing material and stirred uniformly to obtain cement-based inorganic cementing material slurry;
taking a foaming agent, adding water according to the mass ratio of 1:300, standing for 1.5 hours, and then foaming by using the foaming agent to obtain the foam. Pouring foam at a constant speed while continuously stirring the cement-based inorganic cementing material slurry, and stopping stirring when no or only slightly white foam remains on the surface of the slurry to obtain foam concrete slurry;
pouring the stirred foam concrete slurry into a mold (in which a reinforcing mesh is placed in advance) with a specific specification and size, scraping the surface, tightly covering the mold with a preservative film, and removing the mold after one day of indoor maintenance to obtain the foam concrete slab.
The performance of the foam concrete slab which can replace the traditional brick bed-jig and is prepared by the method is shown in table 1.
TABLE 1 Properties of foam concrete slabs
| Numbering device | Measured density/(kg/m) 3 ) | strength/(MPa) |
| Example 1 | 630 | 3.82 |
| Example 2 | 832 | 6.74 |
From table 1 above, foam concrete slabs with different strengths are obtained by designing the adjustment of the volume weight so as to adapt to the application scene without the specification and the size of the bearing platform, and the strength is higher.
In summary, the invention provides the foam concrete slab with controllable density, up to standard strength, simple production, effective improvement of construction simplicity and safety, shortened construction period and cost saving, and the preparation method thereof. Specifically, the invention has the following technical advantages: (1) The density of the prepared foam concrete slab can be 500-850kg/m according to the actual requirements of engineering projects 3 The two workers can carry the steel plate with lower density without crane assistance, so that the installation cost is saved; (2) The mechanical property of the foam concrete slab is good, the strength reaches the standard, and the condition of die explosion in the concrete pouring process after die supporting is ensured not to occur; (3) The foam concrete slab is simple to produce, can be directly cast and molded, and does not need special maintenance conditions; (4) The foam concrete slab is light in weight, is easy to carry and cut on site, can greatly simplify the working procedures of installation and construction, reduces the on-site working time of workers, and can effectively improve the construction simplicity and safety; (5) The foam concrete slab can be prefabricated in advance in a factory, the process of waiting for the upper process is not needed, the installation is quick and the period is short, and the process of waiting for the brick masonry to reach the preset strength like the conventional brick moulding bed after the installation is needed, or the process is similar to the prefabricationThe cement lath waits for the joint mortar to harden, so that the time can be effectively saved before, during and after construction, and the construction period is greatly shortened as a whole; (6) The foam concrete slab has the advantages that the raw materials are simple and easy to obtain, part of cement is replaced by industrial solid waste, the raw material cost is low, the construction period is short, the number of workers required by the same engineering quantity is small, and the cost is effectively reduced from the aspects of raw materials, construction period and manpower; (7) The foam concrete slab has the advantages of simple and easily obtained raw materials, full utilization of industrial solid waste, environmental friendliness, no addition of any harmful solvents, heavy metals and radioactive substances, and no adverse effect on concrete members, soil or surrounding environment after backfilling earthwork.
It is to be understood that the invention is not limited in its application to the examples described above, but is capable of modification and variation in light of the above teachings by those skilled in the art, and that all such modifications and variations are intended to be included within the scope of the appended claims.
Claims (7)
1. The foam concrete slab capable of replacing the traditional brick bed-jig is characterized by comprising the following components:
cement 330-562kg/m 3 Active admixture 0-241kg/m 3 180-321kg/m water 3 Foaming agent 0.06-0.09kg/m 3 Water reducing agent 0.24-0.40kg/m 3 Fibers 0.46-2.76kg/m 3 1 piece of reinforcing steel bar net;
the active admixture is one or more of fly ash, slag powder and silica fume;
the density of the foam concrete slab is 500-850kg/m 3 Between them;
the wire diameter of the reinforcing mesh is 3-5mm, and the mesh diameter is 10-20cm;
the preparation method of the foam concrete slab capable of replacing the traditional brick bed-jig comprises the following steps of:
adding cement, active admixture and fiber into a special mixer for foam concrete or a single horizontal shaft mixer, and stirring to obtain powdery cement-based inorganic cementing material;
mixing water and a water reducing agent, stirring, pouring the mixture into the powdery cement-based inorganic cementing material, and stirring to obtain cement-based inorganic cementing material slurry;
foaming a foaming agent in a physical foaming mode through a foaming machine to obtain foam, pouring the foam while stirring the cement-based inorganic cementing material slurry, and stirring to obtain foam concrete slurry;
pouring the foam concrete slurry into a mould provided with a reinforcing mesh, scraping the surface, tightly covering with a preservative film, and removing the mould after curing to obtain the foam concrete slab.
2. The foam concrete slab capable of replacing a traditional brick bed mould according to claim 1, which is prepared from the following components:
cement 454-529kg/m 3 Active admixture 114-226kg/m 3 Water 227-302kg/m 3 Foaming agent 0.06-0.08kg/m 3 Water reducing agent 0.28-0.38kg/m 3 Fibers 0.92-2.76kg/m 3 And 1 piece of reinforcing mesh.
3. The foam concrete slab capable of replacing a traditional brick bed according to claim 1, wherein the cement is one or more of Portland cement, portland cement and sulphoaluminate cement.
4. The foam concrete slab capable of replacing the traditional brick bed-jig according to claim 1, wherein the water reducing agent is one or more of a polycarboxylate water reducing agent, a naphthalene sulfonate water reducing agent, a calcium lignosulfonate water reducing agent and a sulfamate high-efficiency water reducing agent;
the fiber is one or more of polypropylene fiber, alkali-resistant glass fiber, polyvinyl alcohol fiber, polyurethane fiber and polyimide fiber.
5. A method of making a foam concrete slab as claimed in any one of claims 1 to 4, comprising the steps of:
adding cement, active admixture and fiber into a special mixer for foam concrete or a single horizontal shaft mixer, and stirring to obtain powdery cement-based inorganic cementing material;
mixing water and a water reducing agent, stirring, pouring the mixture into the powdery cement-based inorganic cementing material, and stirring to obtain cement-based inorganic cementing material slurry;
foaming a foaming agent in a physical foaming mode through a foaming machine to obtain foam, pouring the foam while stirring the cement-based inorganic cementing material slurry, and stirring to obtain foam concrete slurry;
pouring the foam concrete slurry into a mould provided with a reinforcing mesh, scraping the surface, tightly covering with a preservative film, and removing the mould after curing to obtain the foam concrete slab.
6. The method for preparing a foam concrete slab capable of replacing a traditional brick bed-jig according to claim 5, wherein the curing temperature is 15-25 ℃, and the curing time is more than 24 hours.
7. Use of a foamed concrete panel according to any one of claims 1-4 as a building foundation tread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684896.4A CN114988808B (en) | 2022-06-16 | 2022-06-16 | Foam concrete slab capable of replacing traditional brick moulding bed and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210684896.4A CN114988808B (en) | 2022-06-16 | 2022-06-16 | Foam concrete slab capable of replacing traditional brick moulding bed and preparation method and application thereof |
Publications (2)
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Effective date of registration: 20230908 Address after: Room 101, Building 2, No. 3, Baofeng Road, Liulian Community, Pingshan District, Shenzhen, Guangdong 518000 Patentee after: SHENZHEN MINGYUAN BUILDING TECHNOLOGY Co.,Ltd. Patentee after: Foshan Yanyi Zhizao Technology Co.,Ltd. Address before: Room 101, Building 2, Temporary Building, No. 3, Baofeng Road, Liulian Community, Pingshan Street, Pingshan District, Shenzhen, Guangdong, 518118 Patentee before: SHENZHEN MINGYUAN BUILDING TECHNOLOGY Co.,Ltd. |