CN115385631A - Foam concrete precast slab for protecting waterproof layer and preparation method and installation method thereof - Google Patents
Foam concrete precast slab for protecting waterproof layer and preparation method and installation method thereof Download PDFInfo
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- CN115385631A CN115385631A CN202211051557.9A CN202211051557A CN115385631A CN 115385631 A CN115385631 A CN 115385631A CN 202211051557 A CN202211051557 A CN 202211051557A CN 115385631 A CN115385631 A CN 115385631A
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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
- 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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00241—Physical properties of the materials not provided for elsewhere in C04B2111/00
- C04B2111/0037—Materials containing oriented fillers or elements
- C04B2111/00379—Materials containing oriented fillers or elements the oriented elements being fibres
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
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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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
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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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Abstract
The invention relates to the field of buildings, in particular to a foam concrete precast slab for protecting a waterproof layer and a preparation method and an installation method thereof. A prefabricated foam concrete slab for protecting water-proof layer is prepared from the raw materials includingThe components with the following parts by weight: 320-583 kg/m of cement 3 Active admixture 0-175 kg/m 3 229 to 350kg/m of water 3 0.07-0.1 kg/m of foaming agent 3 0 to 0.06kg/m of water reducing agent 3 And at least one reinforcing mesh and at least two glass fiber mesh cloths. The foam concrete precast slab for protecting the waterproof layer provided by the invention has the advantages of reducing the density, lightening the weight, facilitating the carrying and the installation of workers, effectively improving the construction speed, reducing the labor intensity of the workers and saving the cost. The invention also provides a preparation method of the foam concrete precast slab for protecting the waterproof layer. The invention also provides an installation method of the foam concrete precast slab for protecting the waterproof layer.
Description
Technical Field
The invention relates to the field of buildings, in particular to a foam concrete precast slab for protecting a waterproof layer and a preparation method and an installation method thereof.
Background
The civil engineering of basement outer wall waterproofing is an important hidden project, and in order to prevent the basement outer wall waterproof layer from being damaged during earthwork backfilling or building service, the basement outer wall waterproof layer needs to be protected by certain measures. The protective layer of the general basement exterior wall external waterproof material has three methods, namely a brick wall protective method, a soft protective layer method and a cement mortar protective layer method, but the three methods have the defects:
(1) The brick wall protection method has the following defects: (1) if the building is too high, the building has the danger of collapse, and the potential safety hazard is large; (2) the construction period is long, the operation layer is in the foundation trench, the operation is crossed, and the probability of people being injured by falling objects is increased; (3) the construction period is long, the subsequent backfill cross operation is influenced, and the project progress is slow; (4) the material cost and the labor cost are higher.
(2) The soft resist method has the following disadvantages: (1) the material is soft, and is easy to be damaged and knocked off during backfilling when a point bonding method is adopted; (2) the polystyrene board or the plastic protection board and the like have combustion performance and great potential safety hazard; (3) for basements with embedding requirements, a soft protection layer method is not required to be adopted in the drawing examination of some regions.
(3) Disadvantages of the protective layer method with cement mortar: the method has requirements on waterproof materials, and the smooth waterproof materials can not adopt a cement mortar protective layer method generally.
At present, the common concrete precast slab is used as a waterproof protective layer, has the advantages of high strength, long service life, high construction speed and the like, and achieves certain effect. However, the common concrete precast slab also has the problems of high cost, heavy weight, difficult installation and the like.
The above drawbacks are expected to be overcome by those skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a foam concrete precast slab for protecting a waterproof layer, which saves cost and has high construction speed.
To achieve the above object, the present invention provides a bulb for protecting a waterproof layerThe foamed concrete precast slab comprises the following raw materials in parts by weight: 320-583 kg/m of cement 3 Active admixture 0-175 kg/m 3 229 to 350kg/m of water 3 0.07-0.1 kg/m of foaming agent 3 0 to 0.06kg/m of water reducing agent 3 And at least one reinforcing mesh and at least two glass fiber mesh cloths.
Preferably, the raw materials of the foam concrete precast slab for protecting the waterproof layer comprise the following components in parts by weight: 412 to 466kg/m 3 46-167 kg/m of active admixture 3 229-292 kg/m of water 3 0.08-0.09 kg/m of foaming agent 3 0.05-0.06 kg/m of water reducing agent 3 One piece of reinforcing mesh and two pieces of glass fiber mesh cloth.
Further, the cement is selected from any one or more of Portland cement, ordinary Portland cement and sulphoaluminate cement.
Further, the active admixture is selected from any one or more of fly ash, slag powder and silica fume.
Further, the water reducing agent is selected from any one or more of a polycarboxylic acid water reducing agent, a naphthalene sulfonate water reducing agent, a calcium lignosulfonate water reducing agent and a sulfamate high-efficiency water reducing agent.
Furthermore, the diameter of the mesh of the reinforcing mesh is 2-4 mm, and the diameter of the mesh of the reinforcing mesh is 10-20 cm. By using the reinforcing mesh, the effect of skeleton reinforcement can be played.
Furthermore, the gram weight of the glass fiber mesh cloth is 80-100 g, and the mesh diameter of the glass fiber mesh cloth is 5-10 mm. The glass fiber mesh cloth can play a role in cracking resistance.
The invention also provides a preparation method of the foam concrete precast slab for protecting the waterproof layer, which comprises the following steps:
s1, weighing raw materials, sequentially adding cement and an active admixture into a special mixer for foam concrete or a single horizontal shaft mixer, and fully and uniformly mixing to obtain a powdery cement-based inorganic cementing material;
s2, sequentially adding water and a water reducing agent, uniformly stirring, pouring the powdery cement-based inorganic cementing material obtained in the step S1, and uniformly stirring to obtain cement-based inorganic cementing material slurry;
s3, weighing a foaming agent, mixing the foaming agent with water in a ratio of 1: adding water in a proportion of 300, standing for 1-2 hours, and then foaming by using the foaming agent added with water to obtain foam; continuously stirring the cement-based inorganic cementing material slurry obtained in the step S2, simultaneously pouring foam at a constant speed, and stopping stirring when no foam is seen or only a little white foam is left on the surface of the cement-based inorganic cementing material slurry to obtain foam concrete slurry;
s4, paving a piece of glass fiber mesh cloth at the bottom of the mold, paving a piece of reinforcing mesh in the middle of the mold, pouring the foam concrete slurry obtained in the step S3 into the mold, and paving a piece of glass fiber mesh cloth on the surface of the foam concrete slurry; and scraping the surface, tightly covering with a preservative film, maintaining indoors for one day, and then removing the mould to obtain the foam concrete precast slab.
Further, the size of the mold in the step S4 is 1.2m × 0.6m, and the thickness is 40cm to 50cm.
The invention also provides a method for mounting the foam concrete precast slab for protecting the waterproof layer, which comprises the following steps:
s1, cleaning up impurities remained on a waterproof layer surface, and checking whether the waterproof layer has phenomena of hollowing, damage, cracking and the like;
s2, preparing special bonding mortar;
s3, typesetting according to the size of the vertical face of the whole basement exterior wall before construction, transversely or vertically installing, horizontally paving and pasting two layers at the bottom in the longitudinal direction, continuously installing, and vertically staggering two rows;
s4, adhering the foam concrete precast slabs, starting from the detailed nodes and the yin-yang angle parts to the middle, making a horizontal control line to ensure horizontal paving, and paving from bottom to top;
s5, tightly extruding plate seams during construction, leveling adjacent plates, and pointing and leveling the plate seams by using mortar;
s6, when the foam concrete precast slab is pasted, firstly, the prepared special bonding mortar in the step S2 is coated on the surface of the foam concrete precast slab, the coating mode can adopt the modes of uniform point bonding or coating a circle on the edge of the precast slab, uniform point bonding in the middle and the like according to the construction habit, and the coating area can be smaller than 50% of the area of the precast slab;
and S7, attaching the foam concrete precast slab after the point fixing is finished to the surface of an outer wall waterproof material, uniformly beating by using a rubber hammer to enable an outer wall waterproof layer to be tightly attached to the foam concrete precast slab, tightly extruding slab joints and leveling adjacent slab surfaces.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with the common concrete precast slab, the foam concrete precast slab for protecting the waterproof layer has the advantages that the density is reduced, the weight is reduced, the foam concrete precast slab is convenient for workers to carry and install, the construction speed is effectively improved, and the labor intensity of the workers can be reduced;
2. the foam concrete precast slab for protecting the waterproof layer reduces the density and the material cost, thereby saving the cost;
3. compared with soft protective layers such as extruded sheets and the like, the foam concrete precast slab for protecting the waterproof layer has longer service life;
4. compared with organic materials such as extruded sheets and the like, the foam concrete precast slab for protecting the waterproof layer belongs to inorganic materials, and has a fireproof grade reaching a fireproof A grade and a high fireproof grade.
Drawings
Fig. 1 is a schematic view illustrating the installation of a foamed concrete precast slab for protecting a waterproof layer according to the present invention.
[ REFERENCE INDICATION OF THE DRAWINGS ] 1, a precast foam concrete slab.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some of the raw materials used in the following examples were purchased as follows:
foaming agent: specially manufactured by Shenzhen Mingyuan building science and technology Limited.
Example 1: foam concrete precast slab for protecting waterproof layer
The raw materials of the foam concrete precast slab for protecting the waterproof layer described in this example include:
390kg/m of 42.5R ordinary Portland cement 3 69kg/m of fly ash 3 229kg/m of water 3 Blowing agent 0.09kg/m 3 0.05kg/m of polycarboxylic acid water reducing agent 3 One piece of reinforcing mesh and two pieces of glass fiber mesh cloth.
Wherein the diameter of the mesh of the reinforcing mesh is 2mm, and the diameter of the mesh of the reinforcing mesh is 10cm; the glass fiber gridding cloth is 80g, and the mesh diameter of the glass fiber gridding cloth is 5mm.
The precast foam concrete panel for protecting a waterproof layer described in this example was prepared by the following method:
s1, weighing raw materials, and sequentially adding 390kg/m of 42.5R ordinary portland cement into a special mixer for foam concrete or a single horizontal shaft mixer 3 69kg/m of fly ash 3 Fully and uniformly stirring to obtain a powdery cement-based inorganic cementing material;
s2, adding 229kg/m of water in sequence 3 0.05kg/m of polycarboxylic acid water reducing agent 3 Uniformly stirring, pouring the powdery cement-based inorganic cementing material obtained in the step S1, and uniformly stirring to obtain cement-based inorganic cementing material slurry;
s3, weighing 0.09kg/m of foaming agent 3 Mixing a foaming agent and water in a ratio of 1: adding water in a proportion of 300, standing for 1-2 hours, and then foaming by using the foaming agent added with water to obtain foam; continuously stirring the cement-based inorganic cementing material slurry obtained in the step S2, and simultaneously pouring foam at a constant speed, wherein when no foam is seen or only foam is seen on the surface of the cement-based inorganic cementing material slurryStopping stirring when a little white foam remains to obtain foam concrete slurry;
s4, paving a piece of glass fiber mesh cloth at the bottom of the mould with the size of 1.2m x 0.6m and the thickness of 40cm, paving a piece of reinforcing mesh in the middle of the mould, pouring the foam concrete slurry obtained in the S3 into the mould, and paving a piece of glass fiber mesh cloth on the surface of the mould; and scraping the surface, tightly covering with a preservative film, maintaining indoors for one day, and then removing the mould to obtain the foam concrete precast slab.
The precast foamed concrete panels for protecting a waterproof layer described in this example were installed by the following method:
s1, cleaning up impurities remained on a waterproof layer surface, and checking whether the waterproof layer has phenomena of hollowing, damage, cracking and the like;
s2, preparing special bonding mortar;
s3, typesetting according to the size of the vertical face of the whole basement exterior wall before construction, transversely or vertically installing, horizontally paving and pasting two layers at the bottom in the longitudinal direction, continuously installing, and vertically staggering two rows;
s4, adhering the foam concrete precast slabs, starting from the detailed nodes and the yin-yang angle parts to the middle, making a horizontal control line to ensure horizontal paving, and paving from bottom to top;
s5, tightly extruding plate joints during construction, leveling adjacent plates, and pointing and leveling the plate joints by mortar;
s6, when the foam concrete precast slab is stuck, coating special prepared bonding mortar in the step S2 on the surface of the foam concrete precast slab, wherein the coating mode can be uniform point sticking or coating a circle on the edge of the precast slab, uniform point sticking in the middle and the like according to the construction habit, and the coating area can be smaller than 50% of the area of the precast slab;
and S7, adhering the foam concrete precast slab after the fixing is finished to the surface of an outer wall waterproof material, uniformly beating the outer wall waterproof layer and the foam concrete precast slab by using a rubber hammer, tightly adhering the outer wall waterproof layer and the foam concrete precast slab, tightly extruding slab joints, and leveling adjacent slab surfaces.
Example 2: foam concrete precast slab for protecting waterproof layer
The raw materials of the foam concrete precast slab for protecting the waterproof layer described in this example include:
42.5R ordinary Portland cement 400kg/m 3 100kg/m of fly ash 3 250kg/m of water 3 Blowing agent 0.08kg/m 3 0.05kg/m of polycarboxylic acid water reducing agent 3 One piece of reinforcing mesh and two pieces of glass fiber mesh cloth.
Wherein the diameter of the mesh of the reinforcing mesh is 2mm, and the diameter of the mesh of the reinforcing mesh is 10cm; the glass fiber gridding cloth is 80g, and the mesh diameter of the glass fiber gridding cloth is 5mm.
The precast foam concrete panel for protecting a waterproof layer described in this example was prepared by the following method:
s1, weighing raw materials, and sequentially adding 400kg/m of 42.5R ordinary Portland cement into a special mixer for foam concrete or a single horizontal shaft mixer 3 100kg/m of fly ash 3 Fully and uniformly stirring to obtain a powdery cement-based inorganic cementing material;
s2, sequentially adding 250kg/m of water 3 0.05kg/m of polycarboxylic acid water reducing agent 3 Uniformly stirring, pouring the powdery cement-based inorganic cementing material obtained in the step S1, and uniformly stirring to obtain cement-based inorganic cementing material slurry;
s3, weighing 0.08kg/m of foaming agent 3 Mixing a foaming agent and water in a ratio of 1: adding water in a proportion of 300, standing for 1-2 hours, and then foaming by using the foaming agent added with water to obtain foam; continuously stirring the cement-based inorganic cementing material slurry obtained in the step S2, simultaneously pouring foam at a constant speed, and stopping stirring when no foam is seen or only a little white foam is left on the surface of the cement-based inorganic cementing material slurry to obtain foam concrete slurry;
s4, paving a piece of glass fiber mesh cloth at the bottom of a mold with the size of 1.2m x 0.6m and the thickness of 40cm, paving a piece of reinforcing mesh in the middle, pouring the foamed concrete slurry obtained in the S3 into the mold, and paving a piece of glass fiber mesh cloth on the surface; and scraping the surface, tightly covering with a preservative film, maintaining indoors for one day, and then removing the mold to obtain the foam concrete precast slab.
The precast foamed concrete panels for protecting a waterproof layer described in this example were installed by the following method:
s1, cleaning up impurities remained on a waterproof layer surface, and checking whether the waterproof layer has phenomena of hollowing, damage, cracking and the like;
s2, preparing special bonding mortar;
s3, typesetting according to the size of the vertical face of the whole basement exterior wall before construction, transversely or vertically installing, horizontally paving and pasting two layers at the bottom in the longitudinal direction, continuously installing, and vertically staggering two rows;
s4, adhering the foam concrete precast slabs, starting from the detailed nodes and the yin-yang angle parts to the middle, making a horizontal control line to ensure horizontal paving, and paving from bottom to top;
s5, tightly extruding plate seams during construction, leveling adjacent plates, and pointing and leveling the plate seams by using mortar;
s6, when the foam concrete precast slab is pasted, firstly, the prepared special bonding mortar in the step S2 is coated on the surface of the foam concrete precast slab, the coating mode can adopt the modes of uniform point bonding or coating a circle on the edge of the precast slab, uniform point bonding in the middle and the like according to the construction habit, and the coating area can be smaller than 50% of the area of the precast slab;
and S7, adhering the foam concrete precast slab after the fixing is finished to the surface of an outer wall waterproof material, uniformly beating the outer wall waterproof layer and the foam concrete precast slab by using a rubber hammer, tightly adhering the outer wall waterproof layer and the foam concrete precast slab, tightly extruding slab joints, and leveling adjacent slab surfaces.
Example 3: foam concrete precast slab for protecting waterproof layer
The raw materials of the foam concrete precast slab for protecting the waterproof layer in the embodiment comprise:
408kg/m of 42.5R ordinary Portland cement 3 175kg/m of fly ash 3 292kg/m of water 3 Blowing agent 0.07kg/m 3 0.06kg/m of polycarboxylic acid water reducing agent 3 One piece of reinforcing mesh and two pieces of glass fiber mesh cloth.
Wherein the diameter of the mesh of the reinforcing mesh is 2mm, and the diameter of the mesh of the reinforcing mesh is 10cm; the glass fiber gridding cloth is 80g, and the mesh diameter of the glass fiber gridding cloth is 5mm.
The precast foam concrete panel for protecting a waterproof layer described in this example was prepared by the following method:
s1, weighing raw materials, and sequentially adding 408kg/m of 42.5R ordinary Portland cement into a special mixer for foam concrete or a single horizontal shaft mixer 3 175kg/m of fly ash 3 Fully and uniformly stirring to obtain a powdery cement-based inorganic cementing material;
s2, sequentially adding 292kg/m of water 3 0.06kg/m of polycarboxylic acid water reducing agent 3 Uniformly stirring, pouring the powdery cement-based inorganic cementing material obtained in the step S1, and uniformly stirring to obtain cement-based inorganic cementing material slurry;
s3, weighing 0.07kg/m of foaming agent 3 Mixing a foaming agent and water in a ratio of 1:300, adding water, standing for 1-2 hours, and then foaming by using the foaming agent added with water to obtain foam; continuously stirring the cement-based inorganic cementing material slurry obtained in the step S2, pouring foam at a constant speed, and stopping stirring when no foam is seen or only a little white foam is left on the surface of the cement-based inorganic cementing material slurry to obtain foam concrete slurry;
s4, paving a piece of glass fiber mesh cloth at the bottom of the mould with the size of 1.2m x 0.6m and the thickness of 40cm, paving a piece of reinforcing mesh in the middle of the mould, pouring the foam concrete slurry obtained in the S3 into the mould, and paving a piece of glass fiber mesh cloth on the surface of the mould; and scraping the surface, tightly covering with a preservative film, maintaining indoors for one day, and then removing the mold to obtain the foam concrete precast slab.
The precast foamed concrete panels for protecting a waterproof layer described in this example were installed by the following method:
s1, cleaning up impurities remained on a waterproof layer surface, and checking whether the waterproof layer has phenomena of hollowing, damage, cracking and the like;
s2, preparing special bonding mortar;
s3, typesetting according to the size of the vertical face of the whole basement exterior wall before construction, transversely or vertically installing, horizontally paving and pasting two layers at the bottom in the longitudinal direction, continuously installing, and vertically staggering two rows;
s4, adhering the foam concrete precast slabs, starting from the detailed nodes and the yin-yang angle parts to the middle, making a horizontal control line to ensure horizontal paving, and paving from bottom to top;
s5, tightly extruding plate joints during construction, leveling adjacent plates, and pointing and leveling the plate joints by mortar;
s6, when the foam concrete precast slab is pasted, firstly, the prepared special bonding mortar in the step S2 is coated on the surface of the foam concrete precast slab, the coating mode can adopt the modes of uniform point bonding or coating a circle on the edge of the precast slab, uniform point bonding in the middle and the like according to the construction habit, and the coating area can be smaller than 50% of the area of the precast slab;
and S7, adhering the foam concrete precast slab after the fixing is finished to the surface of an outer wall waterproof material, uniformly beating the outer wall waterproof layer and the foam concrete precast slab by using a rubber hammer, tightly adhering the outer wall waterproof layer and the foam concrete precast slab, tightly extruding slab joints, and leveling adjacent slab surfaces.
The performance of the foam concrete precast slabs obtained in examples 1 to 3 was measured, and the results are shown in Table 1.
TABLE 1 foam concrete precast slab Performance test results
| Example 1 | Example 2 | Example 3 | |
| Designed density of mixing ratio (kg/m) 3 ) | 550 | 600 | 700 |
| Measured Density (kg/m) 3 ) | 565 | 622 | 730 |
| Compressive strength (MPa) | 2.2 | 2.5 | 3.5 |
The density of the common concrete precast slab is generally 2400kg/m 3 On the left and right, the data in table 1 shows that the design density and the actually measured density of the mix proportion of the embodiment 1, the embodiment 2 and the embodiment 3 are both less than the density of the common concrete precast slab, which indicates that the density of the foam concrete precast slab for protecting the waterproof layer is reduced, thereby reducing the weight, facilitating the carrying and installation of workers, not only effectively improving the carrying and installation speed of the workers, but also reducing the labor intensity of the workers; meanwhile, the material cost is reduced, so that the cost is saved.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (10)
1. A foam concrete precast slab for protecting a waterproof layer is characterized by comprising the following raw materials in parts by weight: 320-583 kg/m of cement 3 Active admixture 0-175 kg/m 3 229 to 350kg/m of water 3 0.07-0.1 kg/m of foaming agent 3 0 to 0.06kg/m of water reducing agent 3 And at least one reinforcing mat and at leastTwo pieces of glass fiber mesh cloth.
2. The foam concrete precast panel for protecting a waterproof layer according to claim 1, wherein the raw material of the foam concrete precast panel for protecting a waterproof layer comprises the following components in parts by weight: 412-466 kg/m cement 3 46-167 kg/m of active admixture 3 229-292 kg/m of water 3 0.08-0.09 kg/m of foaming agent 3 0.05-0.06 kg/m of water reducing agent 3 One piece of reinforcing mesh and two pieces of glass fiber mesh cloth.
3. The precast foamed concrete panel for protecting a waterproof layer according to claim 1, wherein the cement is any one or more selected from the group consisting of portland cement, ordinary portland cement, and sulphoaluminate cement.
4. The precast foam concrete panel for protecting and waterproofing layer according to claim 1, wherein the active admixture is selected from any one or more of fly ash, slag powder and silica fume.
5. The precast foam concrete panel for protecting and waterproofing the layer according to claim 1, wherein the water reducing agent is selected from any one or more of a polycarboxylic acid water reducing agent, a naphthalene sulfonate water reducing agent, a calcium lignosulfonate water reducing agent, and a sulfamate-based high efficiency water reducing agent.
6. The foam concrete precast panel for protecting and waterproofing layer according to claim 1, wherein the wire diameter of said reinforcing mat is 2 to 4mm, and the mesh diameter of said reinforcing mat is 10 to 20cm.
7. The precast foam concrete panel for protecting a waterproof layer according to claim 1, wherein the glass fiber mesh cloth has a grammage of 80g to 100g, and the mesh diameter of the glass fiber mesh cloth is 5mm to 10mm.
8. Process for the preparation of precast foamed concrete panels for the protection of waterproof layers according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, weighing raw materials, sequentially adding cement and an active admixture into a special mixer for foam concrete or a single horizontal shaft mixer, and fully and uniformly mixing to obtain a powdery cement-based inorganic cementing material;
s2, sequentially adding water and a water reducing agent, uniformly stirring, pouring the powdery cement-based inorganic cementing material obtained in the step S1, and uniformly stirring to obtain cement-based inorganic cementing material slurry;
s3, weighing a foaming agent, mixing the foaming agent with water in a ratio of 1: adding water in a proportion of 300, standing for 1-2 hours, and then foaming by using the foaming agent added with water to obtain foam; continuously stirring the cement-based inorganic cementing material slurry obtained in the step S2, simultaneously pouring foam at a constant speed, and stopping stirring when no foam is seen or only a little white foam is left on the surface of the cement-based inorganic cementing material slurry to obtain foam concrete slurry;
s4, paving a piece of glass fiber mesh cloth at the bottom of the mold, paving a piece of reinforcing mesh in the middle of the mold, pouring the foam concrete slurry obtained in the step S3 into the mold, and paving a piece of glass fiber mesh cloth on the surface of the foam concrete slurry; and scraping the surface, tightly covering with a preservative film, maintaining indoors for one day, and then removing the mold to obtain the foam concrete precast slab.
9. The method for manufacturing a precast foamed concrete panel for protecting and waterproofing the layer according to claim 8, wherein the size of the mold in the step S4 is 1.2m x 0.6m and the thickness is 40cm to 50cm.
10. Method for mounting a cellular concrete precast panel for protecting a waterproof layer according to any one of claims 1 to 7, characterized by comprising the steps of:
s1, cleaning up impurities remained on a waterproof layer surface, and checking whether the waterproof layer has phenomena of hollowing, damage, cracking and the like;
s2, preparing special bonding mortar;
s3, typesetting according to the size of the vertical face of the whole basement exterior wall before construction, installing horizontally or vertically, paving and pasting two layers of the bottom horizontally in the length direction to ensure continuous installation, and staggering vertically in an upper row and a lower row;
s4, adhering the foam concrete precast slabs, starting from the detailed nodes and the yin-yang angle parts to the middle, making a horizontal control line to ensure horizontal paving, and paving from bottom to top;
s5, tightly extruding plate seams during construction, leveling adjacent plates, and pointing and leveling the plate seams by using mortar;
s6, when the foam concrete precast slab is stuck, coating special prepared bonding mortar in the step S2 on the surface of the foam concrete precast slab, wherein the coating mode can be uniform point sticking or coating a circle on the edge of the precast slab, uniform point sticking in the middle and the like according to the construction habit, and the coating area can be smaller than 50% of the area of the precast slab;
and S7, adhering the foam concrete precast slab after the fixing is finished to the surface of an outer wall waterproof material, uniformly beating the outer wall waterproof layer and the foam concrete precast slab by using a rubber hammer, tightly adhering the outer wall waterproof layer and the foam concrete precast slab, tightly extruding slab joints, and leveling adjacent slab surfaces.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211051557.9A CN115385631A (en) | 2022-08-30 | 2022-08-30 | Foam concrete precast slab for protecting waterproof layer and preparation method and installation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211051557.9A CN115385631A (en) | 2022-08-30 | 2022-08-30 | Foam concrete precast slab for protecting waterproof layer and preparation method and installation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304257A (en) * | 2013-05-08 | 2013-09-18 | 上海市建筑构件制品有限公司 | Foam concrete and preparation method thereof |
| CN107435417A (en) * | 2017-06-20 | 2017-12-05 | 中国华西企业有限公司 | Roofing foam concrete construction |
| CN114014694A (en) * | 2021-11-15 | 2022-02-08 | 东北大学 | Hydrophobic heat-preservation foam concrete prefabricated part and preparation method thereof |
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2022
- 2022-08-30 CN CN202211051557.9A patent/CN115385631A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103304257A (en) * | 2013-05-08 | 2013-09-18 | 上海市建筑构件制品有限公司 | Foam concrete and preparation method thereof |
| CN107435417A (en) * | 2017-06-20 | 2017-12-05 | 中国华西企业有限公司 | Roofing foam concrete construction |
| CN114014694A (en) * | 2021-11-15 | 2022-02-08 | 东北大学 | Hydrophobic heat-preservation foam concrete prefabricated part and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 王新武等: "建筑工程概论（第3版）", vol. 3, 武汉理工大学出版社, pages: 165 * |
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