CN110130615B - Indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum and construction method thereof - Google Patents
Indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum and construction method thereof Download PDFInfo
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- CN110130615B CN110130615B CN201910350561.7A CN201910350561A CN110130615B CN 110130615 B CN110130615 B CN 110130615B CN 201910350561 A CN201910350561 A CN 201910350561A CN 110130615 B CN110130615 B CN 110130615B
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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
- C04B28/14—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 calcium sulfate cements
- C04B28/142—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements
- C04B28/143—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 calcium sulfate cements containing synthetic or waste calcium sulfate cements the synthetic calcium sulfate being phosphogypsum
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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
- C04B28/34—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 cold phosphate binders
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F15/00—Flooring
- E04F15/12—Flooring or floor layers made of masses in situ, e.g. seamless magnesite floors, terrazzo gypsum floors
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
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- 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
- C04B2111/2038—Resistance against physical degradation
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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
- C04B2111/60—Flooring materials
- C04B2111/62—Self-levelling compositions
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Abstract
The invention discloses an indoor composite floor based on phosphorus-magnesium materials and self-leveling gypsum, which comprises a concrete base layer, a gypsum self-leveling layer and a phosphorus-magnesium material self-leveling plane layer from bottom to top, wherein the gypsum self-leveling layer is positioned between the concrete base layer and the phosphorus-magnesium material self-leveling plane layer; the construction method comprises the steps of equipment and tool preparation, base layer treatment, gypsum self-leveling layer construction, phosphorus-magnesium material self-leveling surface layer construction, maintenance, polishing, waxing and the like. Aiming at the problems that the organic self-leveling material is expensive in manufacturing cost and easy to crust, and the self-leveling material taking gypsum as a base material is poor in water resistance and wear resistance, the invention provides the ground which has the advantages of early strength, short setting time, short curing time, high mechanical strength, difficulty in cracking, no hollowing, strong bending resistance, high water resistance, high wear resistance, good flowing property, low cost, short construction period and high construction efficiency.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to an indoor composite floor based on a phosphorus-magnesium material and self-leveling gypsum and a construction method thereof.
Background
Self-leveling materials, also known as functional floor coverings, are a class of materials that can quickly, economically and efficiently achieve a level, firm or decorative floor. When the material is used, water is added according to a specified proportion for mixing or powder and liquid are uniformly mixed, and after mechanical pumping or manual construction, manual spreading and vibration leveling are not needed, but the slurry automatically flows to form a flat surface by virtue of the high fluidity of the slurry. The self-leveling gypsum is also called gypsum-based self-leveling mortar, and is a dry powder mortar specially used for leveling the ground, which is prepared by elaborately preparing and uniformly mixing gypsum materials, special aggregate and various building chemical additives in a factory. Self-leveling materials are generally classified into two broad categories, organic and inorganic. The organic self-leveling material is self-leveling terrace paint, mainly refers to epoxy self-leveling material, and the unique chemical structure and the bi-component organic compound thereof enable the organic self-leveling material to have good physical and mechanical properties and chemical properties of acid resistance, grease resistance and the like, thus becoming the most commonly applied self-leveling material. The inorganic self-leveling material is a powdery single-component (or a powder and liquid composite double-component) ground building material which is formed by mixing additives such as an inorganic cementing material, a superplasticizer, a retarder, a defoaming agent and the like and fine sand, and is one of functional building mortars.
In the self-leveling material, inorganic self-leveling is a traditional method in China, cracks, peeling and sanding appear, some cracks are even serious, the cracks are still difficult to eliminate after being repaired for many times after being used, and the surface is uneven and has different colors due to frequent repair, so that the self-leveling material is not beautiful, the use is influenced, and the construction period is long; the gypsum self-leveling material in the inorganic self-leveling material is an air-hardening self-leveling material prepared by taking alpha semi-hydrated gypsum as a main material and adding various related additives (such as a retarder, a water reducing agent, a water-retaining agent and the like), and the application is limited due to poor water resistance and wear resistance and high cost. The organic self-leveling is a new practice appearing in recent years, the peeling and sanding phenomena are improved, the surface smoothness, the flatness and the wear resistance are also improved, but the crack phenomenon cannot be eliminated. The surface of the epoxy or polyurethane self-leveling wear-resistant ground is smooth and wear-resistant, but the flatness of the epoxy or polyurethane self-leveling wear-resistant ground completely depends on the flatness of a concrete base layer, the air permeability is poor, the requirement on the water content of the base layer is high, the phenomena of hollowing and peeling are easy to occur if the control is not good, the early strength is low, the initial setting time is long, the construction procedure is complex, scratches are easy to occur on the surface, and the anti-skid performance and the wear-resistant performance cannot meet the engineering design requirements.
Therefore, it is important to develop an indoor composite floor with high water resistance and wear resistance, high flow property and low cost, aiming at the problems that the self-leveling material using epoxy and polyurethane as base materials is expensive in manufacturing cost and easy to crust, and the self-leveling material using gypsum as base material is poor in water resistance and wear resistance, so that the application of the self-leveling material is limited.
Disclosure of Invention
The invention provides an indoor composite floor based on a phosphorus-magnesium material and self-leveling gypsum and a construction method thereof to solve the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the indoor composite floor based on the phosphorus-magnesium material and the self-leveling gypsum comprises a concrete base layer, a gypsum self-leveling layer and a phosphorus-magnesium material self-leveling plane layer from bottom to top, wherein the gypsum self-leveling layer is positioned between the concrete base layer and the phosphorus-magnesium material self-leveling plane layer; the construction method of the indoor composite ground comprises the following steps:
carrying out primary layer treatment: chiseling the concrete base layer leakage part into a V shape, wherein the chiseling depth is 4.8-5.2 cm, tightly plugging with phosphorus and magnesium repair mortar, and checking whether leakage exists after drying;
secondly, gypsum self-leveling course construction: firstly, automatically paving a leveling layer by using mixed-phase phosphogypsum-based self-leveling, and then performing gypsum self-leveling layer construction, wherein the construction comprises the procedures of level control, pouring, paving and leveling layer maintenance; when pouring is carried out, firstly, gypsum self-leveling mortar required by the gypsum self-leveling layer is prepared, and pouring is carried out when the initial fluidity, the setting time and the mortar segregation meet the pouring requirements;
construction of a self-leveling surface layer of the phosphorus-magnesium material: after the compressive strength of the gypsum self-leveling layer reaches more than 2.5MPa, carrying out construction of a phosphorus-magnesium material self-leveling surface layer, wherein the construction comprises the working procedures of setting of a partitioning seam, horizontal control, pouring of a surface decoration and marking part and pouring of other parts; pouring the surface decoration and the marking part: pouring the phosphorus-magnesium self-leveling mortar required by the pre-prepared surface decoration and the marking part when the fluidity and the setting time of the phosphorus-magnesium self-leveling mortar meet the requirements; pouring other parts: adding the phosphorus-magnesium material into a mortar spraying machine within 1.5-2.3 min, uniformly stirring for 4.8-5.3 min to form phosphorus-magnesium self-leveling mortar, and pouring when the fluidity and the setting time of the phosphorus-magnesium self-leveling mortar meet the requirements;
and fourthly, maintenance: after initial setting on the surface of the phosphorus-magnesium self-leveling mortar, naturally curing for 2-3 h;
polishing and waxing: and when the base layer is maintained to have the compressive strength of 24-27 MPa, polishing and grinding the base layer by using a resin polishing machine, sucking and removing the ground residues, and then coating dense wax on the base layer, wherein the expansion joint is left at the position of the expansion joint of the original base layer.
Furthermore, the gypsum self-leveling layer is a gypsum self-leveling mortar layer, and the gypsum self-leveling mortar permeates into the concrete base layer and is combined with the concrete base layer into a whole when being poured.
Furthermore, the phosphorus-magnesium material self-leveling surface layer is a phosphorus-magnesium self-leveling mortar layer, and the phosphorus-magnesium self-leveling mortar permeates into the gypsum self-leveling surface layer during pouring and is combined with the gypsum self-leveling surface layer into a whole.
Further, the thickness of the gypsum self-leveling layer and the thickness of the phosphorus-magnesium material self-leveling plane layer are respectively 20-30 mm and 2-6 mm.
Further, in the second step, the gypsum self-leveling mortar is prepared from the following raw materials in parts by weight: 8000-10000 parts of mixed-phase phosphogypsum, 5-10 parts of additive and 0-4000 parts of aggregate; the mixed-phase phosphogypsum is obtained by calcining phosphogypsum at a high temperature of 800-850 ℃ and grinding the calcined phosphogypsum to 200-400 meshes; the additive is a compound retarder of citric acid, sodium tripolyphosphate, sodium hexametaphosphate and disodium ethylene diamine tetraacetate; the preparation method comprises the following steps: and uniformly mixing the mixed-phase phosphogypsum, the additive and the aggregate, adding the mixture into a stirring water stirrer, and fully stirring to obtain the gypsum self-leveling mortar.
Further, in the second step, the deviation allowed by the flatness of the gypsum self-leveling layer is +/-2 mm, and the compressive strength of the gypsum self-leveling layer is more than 6MPa after 24 hours of construction.
Further, in the second step, before pouring, the initial fluidity of the gypsum self-leveling mortar is 135 +/-5 mm, the fluidity is 260-300 mm, and the setting time is 1-1.5 h.
Further, in the second step and the third step, the shrinkage of the gypsum self-leveling mortar and the phosphorus magnesium self-leveling mortar is lower than 0.05%, and the gypsum self-leveling mortar and the phosphorus magnesium self-leveling mortar have good compatibility.
Further, in the third step, before pouring, the initial fluidity of the phosphorus-magnesium material surface layer mortar is 135 +/-5 mm, and the setting time is 0.5-1.5 h.
Further, in the third step, the phosphorus-magnesium self-leveling mortar is prepared from the following raw materials in parts by weight: 80-120 parts of magnesium phosphate cement, 2-15 parts of an additive, 0-20 parts of an admixture, 0-5 parts of a pigment and 40-120 parts of an aggregate; the magnesium phosphate cement is a mixture of dead-burned magnesium oxide and monoammonium phosphate according to a mass ratio of 1-4.5: 1; the additive is one or more of borax, defoaming agent and water reducing agent; the admixture is a mixture of fly ash and metakaolin according to a mass ratio of 2-4: 1; the pigment is a synthetic inorganic pigment with the fineness of 100-400 meshes; the preparation method comprises the following steps: and uniformly mixing the magnesium phosphate cement, the admixture, the pigment and the aggregate, adding water for stirring and the additive, and fully stirring in a stirrer to obtain the magnesium phosphate self-leveling mortar.
The phosphorus-magnesium repair mortar mainly comprises magnesium oxide, phosphate, an additive and fine aggregate, and has the characteristics of early strength, quick setting, high bonding strength, water resistance and wear resistance.
In the application, the performance of the mixed-phase phosphogypsum is between that of beta gypsum and alpha gypsum, and the mixed-phase phosphogypsum has the characteristics of high strength and stable performance; the additive can obviously delay the setting time of the phosphogypsum and has relatively small influence on the strength of a phosphogypsum hardened body.
The dead burned magnesium oxide is characterized in that: the magnesite calcined at the temperature of more than 1600 ℃ has the magnesia content of 88-95 percent and the fineness of 80-400 meshes; the monoammonium phosphate is characterized in that: the industrial product grade monoammonium phosphate has oxygen content not less than 57% and fineness of 120-400 meshes; the borax is characterized in that: the purity of the industrial grade borax is not lower than 95% in mass percent, and the fineness of the borax is 120-400 meshes; the defoaming agent is an organic silicon powder defoaming agent; the grade of the fly ash is not lower than that of the second-grade fly ash, and the fineness of the fly ash is 800-1600 meshes; the metakaolin is calcined kaolin with the temperature of more than 800 ℃, and the fineness of the metakaolin is 800-1600 meshes; the activity of the metal oxide contained in the synthetic inorganic pigment is lower than that of magnesium oxide, and the synthetic inorganic pigment further serves as aggregate with crystal structures of hydrated magnesium phosphate and hydrated magnesium ammonium phosphate, so that the stability of the material is improved.
The aggregate is sand, and the sand passes through the procedures of screening, shaping, dust removal and the like in the processing process, so that the gradation of the sand meets the quality standard, the sand aggregate is in a cubic polygon shape, the void ratio can be effectively reduced, the bulk density and the compressive strength are increased, the using amount of magnesium phosphate cement can be greatly reduced, meanwhile, the powder content in the sand can be effectively controlled, and the particle size is less than 0.6 mm.
The fluidity referred to herein is that of a self-levelling mortar as measured by the spread of the mortar. According to the test standard, the mortar is poured into a tubular test mould of defined dimensions and then lifted, the mortar flowing freely and spreading out into a circular shape, the diameter of the circle being the fluidity.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the invention provides an indoor composite floor which takes self-leveling gypsum as a leveling layer and a phosphorus-magnesium material as a surface layer, aiming at the problems that the self-leveling material taking epoxy and polyurethane as base materials is expensive in manufacturing cost and easy to crust, and the self-leveling material taking gypsum as a base material is poor in water resistance and wear resistance, so that the application of the self-leveling material is limited.
(2) On the basis of meeting the fluidity, the water consumption is reduced as much as possible, the higher the fluidity of the self-leveling mortar is, the higher the segregation and sedimentation degree is, and the lower the surface strength is; the smaller the fluidity, the higher the viscosity, the poorer the workability, and the bubbles on the surface were difficult to be eliminated. Firstly, batching materials according to the colors of the surface decoration and the marking area for construction, dividing the whole operation surface into blocks after the construction is finished, and constructing each block; the construction saves templates for block construction on one hand, simplifies construction procedures on the other hand, improves construction efficiency, saves construction period, and on the other hand, the surface decoration and the scribing part are not easy to be ground off, and the surface decoration and the scribing are not needed to be carried out after the surface layer reaches certain strength; carrying out surface layer construction, carrying out interface treatment between a leveling layer and a surface layer of the conventional terrace, and carrying out surface layer construction after an interface agent is dried for 24 hours, wherein otherwise, the interlayer bonding strength is weakened, a cold joint or a horizontal construction joint exists, and the service life of the ground is greatly shortened; the leveling layer is gypsum self-leveling mortar, strong bonding strength is achieved between layers without interface treatment, the phosphorus and magnesium material can form oxide films on the surfaces of contacts and the surfaces of the contacts, the oxide films have good bonding performance, the phosphorus and magnesium material can be constructed at any time, and construction joints cannot be formed.
(3) The gypsum self-leveling mortar and the phosphorus-magnesium self-leveling mortar used in the application basically do not shrink, and the two materials have good compatibility and can not generate cracks and hollows.
(4) The resin polishing machine is used for polishing and grinding, the surface floating slurry layer can be polished, and the dense layer is leaked out and is not easy to damage; the coating of the dense wax plays a role in water resistance and brightness.
(5) The leveling layer is gypsum self-leveling mortar, is constructed by gypsum self-leveling, is accurate in size, extremely high in levelness, free of hollowing and cracking, easy and convenient to operate and high in efficiency; and adopt the patching machine pump sending construction, daily shop ground can reach 800 ~ 1000m to realize leveling layer high accuracy, quick flattening, can make the deviation that the leveling layer roughness allows be 1 mm.
(6) The construction method of the invention saves the template for block construction on one hand, simplifies the construction procedure on the other hand, improves the construction efficiency, saves the construction period on the other hand, and on the other hand, the surface decoration and the scribing part are not easy to be ground off, and the surface decoration and the scribing are not needed to be carried out after the surface layer reaches certain strength.
(7) The phosphorus-magnesium material used in the invention has high-strength wear-resistant adhesive property, can be constructed at any time and can not form construction joints; the prepared indoor composite floor does not emit Volatile Organic Compounds (VOC), completely meets the safety technical standard of indoor interior wall coatings, and the mortar used by the invention is an inorganic cementing material and has strong fire resistance.
(8) The phosphorus-magnesium repair mortar used in the invention has the advantages of early strength, quick setting, high bonding strength, water resistance and wear resistance, so that ground gaps can be waterproof and wear resistant, and the construction can be carried out without waiting after the phosphorus-magnesium repair mortar is applied, thereby saving time and improving working efficiency.
Drawings
In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the drawings needed in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some examples of the present invention, and for a person skilled in the art, without inventive step, other drawings can be obtained according to these drawings:
FIG. 1 is a flow chart of the construction process of the indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum;
fig. 2 is a schematic structural diagram of the indoor composite floor based on the phosphorus-magnesium material and the self-leveling gypsum.
In the drawings: 1-concrete base course, 2-gypsum self-leveling layer and 3-phosphorus magnesium material self-leveling layer.
Detailed Description
The following is a detailed description of the embodiments of the present invention, but the present invention is not limited to these embodiments, and any modifications or substitutions in the basic spirit of the embodiments are included in the scope of the present invention as claimed in the claims.
Example 1
As shown in fig. 2, the indoor composite floor based on the phosphorus-magnesium material and the self-leveling gypsum comprises a concrete base layer 1, a gypsum self-leveling layer 2 and a phosphorus-magnesium material self-leveling surface layer 3 from bottom to top, wherein the gypsum self-leveling layer 2 is positioned between the concrete base layer 1 and the phosphorus-magnesium material self-leveling surface layer 3; the gypsum self-leveling layer 2 is a gypsum self-leveling mortar layer, and the gypsum self-leveling mortar permeates into the concrete base layer 1 and is combined with the concrete base layer into a whole when being poured; the phosphorus-magnesium material self-leveling surface layer 3 is a phosphorus-magnesium self-leveling mortar layer, and phosphorus-magnesium self-leveling mortar permeates into the gypsum self-leveling surface layer 2 and is combined with the gypsum self-leveling surface layer into a whole when pouring; the thickness of the gypsum self-leveling layer 2 and the thickness of the phosphorus-magnesium material self-leveling plane layer 3 are respectively 20mm and 2 mm.
As shown in fig. 1, a construction method of an indoor composite floor based on a phosphorus-magnesium material and self-leveling gypsum comprises the following steps:
1. preparation of devices and tools
Preparing a pulp shooting machine (stirring and conveying integrated machine), a ground polisher, an air compressor, a vacuum cleaner, a concrete strength resiliometer, a ground pull strength tester, a fluidity tester, a level, a resin polisher, a steel brush, a paint brush or a roller, a water containing barrel, special nail shoes, a rubber barrel, high-barrel rain shoes, nail shoes and foaming adhesive stickers according to the conventional process requirements; the relevant equipment uses and quantities are shown in table 1 below.
TABLE 1
2. Base layer treatment
Removing accumulated water by adopting partition treatment, checking the leakage condition of a bottom plate, finding out structural gaps, marking by using ink lines, chiseling the leakage part into a V shape, wherein the chiseling depth is 4.8-5.2 cm, tightly plugging by using a plugging material, checking after drying, and if no leakage exists, tightly sealing by using a phosphorus-magnesium material, wherein the surface of fine stone concrete does not exceed the surface of the structural plate by 2 cm; after the bottom plate is completely plugged, polishing and cleaning the surface layer of the bottom plate (ensuring that the surface layer has no laitance and no garbage) until the structural concrete is completely exposed and the part which can not be polished by the polisher is polished by using a steel brush; and cleaning the ground cement paste dust and waste, and then, sucking dust by using a dust collector.
Treating the concrete base layer 1 until the concrete base layer is clean, solid and flat, can bear load and has no loose objects; the compression strength of the concrete base layer 1 is more than 20MPa, and the surface pull strength of the concrete base layer 1 is not less than 1.5 MPa; if the original concrete base layer concrete ground strength is too low, and the surface has laitance or has serious sand, polishing is carried out until a solid surface is exposed.
3. Gypsum self-leveling screed construction
If the flatness deviation of the concrete base layer 1 exceeds 2mm, firstly leveling, and then constructing a gypsum self-leveling layer 2; the gypsum self-leveling layer is gypsum self-leveling; the thickness of the gypsum self-leveling layer is 20mm, the deviation allowed by the flatness of the gypsum self-leveling layer is not more than 2mm, and the compressive strength is more than 6MPa after 24 hours of construction.
3.1 level control
The indoor gypsum self-leveling layer 2 is used for draining water and finding slopes in the directions of a water collecting well, a ditch and the like according to design requirements, in order to achieve the design effect, the design elevation is calculated from the lowest point according to a drawing before construction at intervals of 9m, ash cakes are hammered on the bottom plate at the site at intervals of 1500mm vertically and horizontally according to the drawing position, the calculated elevation is hammered on a ground warehouse column by a level gauge, and finally, a hemp is pulled or rechecked by a laser level gauge.
3.2 pouring
Pouring the gypsum self-leveling layer 2 into the whole area; preparing building phosphogypsum, preparing gypsum self-leveling mortar required by the gypsum self-leveling layer 2, and detecting the fluidity, the setting time and mortar segregation tests until the requirements are met; the baffles at different elevations are mainly at the positions of a toilet, a kitchen and a balcony.
The area of the separation seam is more than 30m2The ground of (2) needs to be provided with separation seams arranged at the positions of doorways and columns. In the initial stage of pumping gypsum self-leveling mortar, a large plastic barrel is firstly used for receiving water for wetting a pump pipe, after the formal self-leveling mortar is pumped out, the pump pipe is moved into a stirrer for further stirring, then the gypsum self-leveling mortar is poured to the ground through the pump pipe and slowly and uniformly moves from left to right and from inside to outside, so that the phenomenon that too much local pump slurry is used for influencing the final leveling effect is avoided, and materials are uniformly paved.
3.3 spreading
After the gypsum self-leveling mortar flows out and automatically levels mortar with a width of 500mm, operators who hold the roller and wear the long rubber shoes with feet gently comb the surface of the gypsum self-leveling mortar for the first time, and comb and derive air bubbles in the mortar through gentle rolling, so that the aim of assisting in leveling the mortar is fulfilled. After the gypsum self-leveling mortar flows out of the range of 1000mm wide, an operator holding the roller and wearing nail shoes by feet gently combs the surface of the gypsum self-leveling mortar for the second time, and the surface of the gypsum self-leveling mortar is combed by gentle trowelling and pressing.
3.4 curing
After the construction of the gypsum self-leveling layer 2 is completed, the site is sealed, and the initially set gypsum self-leveling ground is naturally maintained.
4. Construction of self-leveling surface layer of phosphorus-magnesium material
After the compressive strength of the gypsum self-leveling layer 2 reaches more than 2.5MPa after construction, paying off on the gypsum self-leveling layer 2 according to a design drawing; the thickness of the self-flow leveling layer made of the phosphorus-magnesium material is 3mm, the working area is allowed to ventilate a little, and the gypsum self-flow leveling layer 2 is cleaned before pouring; the self-leveling surface layer 3 of the phosphorus-magnesium material is constructed in blocks.
4.1 Block slit arrangement
Due to the large garage area, the phosphorus-magnesium material self-leveling surface layer 3 has various colors, and the phosphorus-magnesium material self-leveling surface layer 3 is constructed in a partitioning mode. Setting the blocking gaps according to the designed column net (namely, arranging the blocking gaps along the longitudinal and transverse axis directions), and setting foam adhesive paper on the periphery of the blocking gaps; and after the construction of the block is finished, performing the construction of the next block.
4.2 level control
The phosphorus-magnesium material gravity flow plane layer 3 of the ground reservoir is provided with drainage and slope finding in the directions of a water collecting well, a ditch and the like according to design requirements, in order to achieve the design effect, the design elevation is calculated from the lowest point according to a drawing before construction at intervals of 9m, ash cakes are hammered on a bottom plate at the site at intervals of 1500mm vertically and horizontally according to the drawing position, the calculated elevation is hammered on a ground reservoir column by a level gauge, and finally, a hemp is pulled or a laser level gauge is used for rechecking.
4.3 finishing and line-marking site construction
Before pouring, removing the surface decoration and the foam adhesive sticker around the area marking part, and sticking an adhesive tape on the edge to prevent the foam adhesive sticker from falling on other parts during pouring; preparing a phosphorus-magnesium material, preparing phosphorus-magnesium mortar required by the phosphorus-magnesium material self-leveling surface layer 3 in advance, and detecting the fluidity and the setting time of the phosphorus-magnesium mortar until the requirements are met; preparing a phosphorus-magnesium material according to a required proportion; and (3) calculating the using amount of the phosphorus-magnesium material according to the areas of the surface decoration and the marking part in the blocks, stirring by using a handheld electric stirrer because the pouring amount is less, and leveling and defoaming by using a small defoaming roller after pouring.
4.4 construction of other parts in blocks
Before pouring, removing the surface decoration and arranging the foam adhesive sticker on the periphery of the area marking part, preparing a phosphorus-magnesium material, preparing phosphorus-magnesium mortar required by the phosphorus-magnesium material self-leveling surface layer 3 in advance, and detecting the fluidity and the setting time of the phosphorus-magnesium mortar until the requirements are met; preparing a phosphorus-magnesium material according to a required proportion; adding the mixture into a mortar spraying machine within 2 minutes, uniformly stirring for 5 minutes, transferring the stirred phosphorus-magnesium self-leveling mortar into a conveying hopper, pouring the phosphorus-magnesium self-leveling mortar from the lowest part of the common part by the conveying hopper, paying attention to a marking line on a column at the moment of pouring, and just soaking the mortar in the marking line during pouring; after the 500mm wide-range mortar flowing out of the phosphorus-magnesium self-leveling mortar is automatically leveled, an operator who holds the roller and wears the long-tube rubber shoes by feet gently combs the surface of the phosphorus-magnesium self-leveling mortar for the first time, and combs and derives air bubbles in the mortar through gentle rolling, so that the aim of assisting leveling is fulfilled. After the phosphorus-magnesium self-leveling mortar flows out of the range of 1000mm wide, an operator holding the roller and wearing nail shoes by feet gently combs the surface of the gypsum self-leveling mortar for the second time, and the operator gently screeds and presses the surface of the gypsum self-leveling mortar to comb the surface of the gypsum self-leveling mortar.
And after the construction of the block is finished, the construction of the next block is carried out, and the whole area is constructed in sequence.
5. Maintaining
And after the surface of the phosphorus-magnesium self-leveling mortar is initially set, naturally curing for 2 hours.
6. Polishing and waxing
And after natural curing for 2 hours, polishing and grinding the phosphorus-magnesium material by using a resin polishing machine when the compressive strength of 3 layers of the self-leveling surface of the phosphorus-magnesium material reaches 25MPa, and sucking the ground residue and dust by using a dust collector. Then coating compact wax to play the role of water resistance and brightness. The expansion joint is reserved at the position of the expansion joint of the original base layer.
Further, the gypsum self-leveling mortar is prepared from the following raw materials in parts by weight: 8000 parts of mixed-phase phosphogypsum, 5 parts of additive and 10 parts of aggregate; the mixed-phase phosphogypsum is obtained by calcining phosphogypsum at the high temperature of 800 ℃ and grinding the calcined phosphogypsum to 200 meshes; the additive is a compound retarder of citric acid, sodium tripolyphosphate, sodium hexametaphosphate and disodium ethylene diamine tetraacetate; the preparation method comprises the following steps: uniformly mixing the mixed-phase phosphogypsum, the additive and the aggregate, adding the mixture into a stirring water stirrer, and fully stirring to obtain gypsum self-leveling mortar; the deviation allowed by the flatness of the gypsum self-leveling layer is +/-2 mm, and the compressive strength of the gypsum self-leveling layer is more than 6MPa after 24 hours of construction; the initial fluidity of the gypsum self-leveling mortar is 135 +/-5 mm, the fluidity is 260mm, and the setting time is 1 h.
Further, the initial fluidity of the phosphorus-magnesium material surface layer mortar is 135 +/-5 mm, the setting time is 0.5h, and the phosphorus-magnesium self-leveling mortar is prepared from the following raw materials in parts by weight: 80 parts of magnesium phosphate cement, 2 parts of an additive, 1 part of an admixture, 1 part of a pigment and 40 parts of an aggregate; the magnesium phosphate cement is a mixture of dead-burned magnesium oxide and monoammonium phosphate according to the mass ratio of 1: 1; the additive is one or more of borax, defoaming agent and water reducing agent; the admixture is a mixture of fly ash and metakaolin according to the mass ratio of 2: 1; the pigment is a synthetic inorganic pigment with the fineness of 100 meshes; the preparation method comprises the following steps: and uniformly mixing the magnesium phosphate cement, the admixture, the pigment and the aggregate, adding water for stirring and the additive, and fully stirring in a stirrer to obtain the magnesium phosphate self-leveling mortar.
In the step 3, the initial fluidity of the gypsum self-leveling layer 2 is 135 +/-5 mm, and the setting time is 1 h; the gypsum self-leveling layer 2 is gypsum self-leveling mortar, and the gypsum self-leveling layer 2 constructed by gypsum self-leveling construction is accurate in size, extremely high in levelness, free of hollowing and cracking, easy and convenient to operate and high in efficiency; pumping construction is carried out by adopting a shotcrete machine, and daily pavement can reach 800 m; thereby realizing the high-precision and quick leveling of the gypsum self-leveling layer 2 and ensuring that the deviation allowed by the leveling layer flatness is 1 mm.
In the step 4, water is added according to the specified water consumption and stirred uniformly, so that the initial fluidity of the phosphorus-magnesium material surface layer mortar is 135 +/-5 mm, and the setting time is 0.5 h. On the basis of meeting the fluidity, the water consumption is required to be reduced as much as possible, the higher the fluidity of the self-leveling mortar is, the higher the segregation and sedimentation degree is, and the lower the surface strength is; the smaller the fluidity, the higher the viscosity, the poorer the workability, and the bubbles on the surface were difficult to be eliminated. Firstly, batching materials according to the colors of the surface decoration and the marking area for construction, dividing the whole operation surface into blocks after the construction is finished, and constructing each block; according to the construction, on one hand, templates for block construction are saved, on the other hand, the construction procedure is simplified, the construction efficiency is improved, the construction period is saved, on the other hand, the surface decoration and the scribing part are not easy to be ground off, and the surface decoration and the scribing are carried out after the phosphorus-magnesium material self-flowing plane layer reaches certain strength; the construction of the self-leveling surface layer made of the phosphorus-magnesium material is carried out, the interface treatment is carried out between the gypsum self-leveling layer 2 and the self-leveling surface layer 3 of the phosphorus-magnesium material of the conventional floor, the construction of the self-leveling surface layer made of the phosphorus-magnesium material can be carried out after the interface agent is dried for 24 hours, otherwise, the interlayer bonding strength is weakened, cold joints or horizontal construction joints exist, and the service life of the ground is greatly shortened; the gypsum self-leveling layer 2 is gypsum self-leveling mortar, strong bonding strength exists between layers without interface treatment, the phosphorus and magnesium materials can form oxide films on the surfaces of contacts and the surfaces of the contacts, the oxide films have good associativity, the phosphorus and magnesium materials can be constructed at any time, and construction joints cannot be formed.
In the steps 3 and 4, the shrinkage of the gypsum self-leveling mortar and the phosphorus-magnesium self-leveling mortar is lower than 0.05 percent, the gypsum self-leveling mortar and the phosphorus-magnesium self-leveling mortar are basically not shrunk, the two materials have good compatibility, and cracks and hollows are not generated.
In the step 6, when the compressive strength of the self-leveling surface layer 3 of the phosphorus-magnesium material reaches 25MPa, polishing and grinding are carried out by using a resin polishing machine, a floating slurry layer on the surface can be polished, a dense layer is leaked, and the self-leveling surface layer is not easy to damage; the coating of the dense wax plays a role in water resistance and brightness.
Example 2
As shown in fig. 2, the indoor composite floor based on the phosphorus-magnesium material and the self-leveling gypsum comprises a concrete base layer 1, a gypsum self-leveling layer 2 and a phosphorus-magnesium material self-leveling surface layer 3 from bottom to top, wherein the gypsum self-leveling layer 2 is positioned between the concrete base layer 1 and the phosphorus-magnesium material self-leveling surface layer 3; the gypsum self-leveling layer 2 is a gypsum self-leveling mortar layer, and the gypsum self-leveling mortar permeates into the concrete base layer 1 and is combined with the concrete base layer into a whole when being poured; the phosphorus-magnesium material self-leveling surface layer 3 is a phosphorus-magnesium self-leveling mortar layer, and phosphorus-magnesium self-leveling mortar permeates into the gypsum self-leveling surface layer 2 and is combined with the gypsum self-leveling surface layer into a whole when pouring; the thickness of the gypsum self-leveling layer 2 and the thickness of the phosphorus-magnesium material self-leveling plane layer 3 are respectively 30mm and 6 mm.
As shown in fig. 1, a construction method of an indoor composite floor based on a phosphorus-magnesium material and self-leveling gypsum comprises the following steps:
1. preparation of devices and tools
Preparing a pulp shooting machine (stirring and conveying integrated machine), a ground polisher, an air compressor, a vacuum cleaner, a concrete strength resiliometer, a ground pull strength tester, a fluidity tester, a level, a resin polisher, a steel brush, a paint brush or a roller, a water containing barrel, special nail shoes, a rubber barrel, high-barrel rain shoes, nail shoes and foaming adhesive stickers according to the conventional process requirements; the relevant equipment uses and quantities are shown in table 1.
2. Base layer treatment
Removing accumulated water by adopting partition treatment, checking the leakage condition of a bottom plate, finding out structural gaps, marking by using ink lines, chiseling the leakage part into a V shape, wherein the chiseling depth is 5cm, plugging tightly by using a plugging material, checking after drying, and if no leakage exists, tightly sealing by using a phosphorus-magnesium material, wherein the fine stone concrete surface does not exceed the surface of the structural plate by 2 cm; after the bottom plate is completely plugged, polishing and cleaning the surface layer of the bottom plate (ensuring that the surface layer has no laitance and no garbage) until the structural concrete is completely exposed and the part which can not be polished by the polisher is polished by using a steel brush; and cleaning the ground cement paste dust and waste, and then, sucking dust by using a dust collector.
So that the concrete base layer 1 is clean, solid, flat and capable of bearing load without loose objects; the compression strength of the concrete base layer 1 is more than 20MPa, and the surface pull strength of the concrete base layer 1 is not less than 1.5 MPa; if the original concrete base layer concrete ground strength is too low, and the surface has laitance or has serious sand, polishing is carried out until a solid surface is exposed.
3. Gypsum self-leveling screed construction
When the flatness deviation of the concrete base layer 1 exceeds 2mm, firstly leveling, and then constructing a gypsum self-leveling layer 2; the gypsum self-leveling layer is gypsum self-leveling; the thickness of the gypsum self-leveling layer is 30mm, the deviation allowed by the flatness of the gypsum self-leveling layer is 2mm, and the compressive strength is more than 6MPa after 24 hours of construction.
3.1 level control
The indoor gypsum self-leveling layer 2 is used for draining water and finding slopes in the directions of a water collecting well, a ditch and the like according to design requirements, in order to achieve the design effect, the design elevation is calculated from the lowest point according to a drawing before construction at intervals of 9m, ash cakes are hammered on the bottom plate at the site at intervals of 1500mm vertically and horizontally according to the drawing position, the calculated elevation is hammered on a ground warehouse column by a level gauge, and finally, a hemp is pulled or rechecked by a laser level gauge.
3.2 pouring
Pouring the gypsum self-leveling layer 2 into the whole area; preparing building phosphogypsum, preparing gypsum self-leveling mortar required by the gypsum self-leveling layer 2, and detecting the fluidity, the setting time and mortar segregation tests until the requirements are met; the baffles at different elevations are mainly at the positions of a toilet, a kitchen and a balcony.
The area of the separation seam is more than 30m2The ground of (2) needs to be provided with separation seams arranged at the positions of doorways and columns. In the initial stage of pumping gypsum self-leveling mortar, a large plastic barrel is firstly used for receiving water for wetting a pump pipe, after the formal self-leveling mortar is pumped out, the pump pipe is moved into a stirrer for further stirring, then the gypsum self-leveling mortar is poured to the ground through the pump pipe and slowly and uniformly moves from left to right and from inside to outside, too much local pump slurry is strictly forbidden, the final leveling effect is influenced, and materials are uniformly spread.
3.3 spreading
After the gypsum self-leveling mortar flows out and automatically levels mortar with a width of 500mm, operators who hold the roller and wear the long rubber shoes with feet gently comb the surface of the gypsum self-leveling mortar for the first time, and comb and derive air bubbles in the mortar through gentle rolling, so that the aim of assisting in leveling the mortar is fulfilled. After the gypsum self-leveling mortar flows out of the range of 1000mm wide, an operator holding the roller and wearing nail shoes by feet gently combs the surface of the gypsum self-leveling mortar for the second time, and the surface of the gypsum self-leveling mortar is combed by gentle trowelling and pressing.
3.4 curing
After the construction of the gypsum self-leveling layer 2 is completed, the site is sealed, and the initially set gypsum self-leveling ground is naturally maintained.
4. Construction of self-leveling surface layer of phosphorus-magnesium material
After the compressive strength of the gypsum self-leveling layer 2 reaches more than 2.5MPa after construction, paying off on the gypsum self-leveling layer 2 according to a design drawing; the thickness of the self-flow leveling layer made of the phosphorus-magnesium material is 5mm, the working area is allowed to ventilate a little, and the gypsum self-flow leveling layer 2 is cleaned before pouring; the self-leveling surface layer 3 of the phosphorus-magnesium material is constructed in blocks.
4.1 Block slit arrangement
Due to the large garage area, the phosphorus-magnesium material self-leveling surface layer 3 has various colors, and the phosphorus-magnesium material self-leveling surface layer 3 is constructed in a partitioning mode. Setting the blocking gaps according to the designed column net (namely, arranging the blocking gaps along the longitudinal and transverse axis directions), and setting foam adhesive paper on the periphery of the blocking gaps; and after the construction of the block is finished, performing the construction of the next block.
4.2 level control
The phosphorus-magnesium material gravity flow plane layer 3 of the ground reservoir is provided with drainage and slope finding in the directions of a water collecting well, a ditch and the like according to design requirements, in order to achieve the design effect, the design elevation is calculated from the lowest point according to a drawing before construction at intervals of 9m, ash cakes are hammered on a bottom plate at the site at intervals of 1500mm vertically and horizontally according to the drawing position, the calculated elevation is hammered on a ground reservoir column by a level gauge, and finally, a hemp is pulled or a laser level gauge is used for rechecking.
4.3 finishing and line-marking site construction
Before pouring, removing the surface decoration and the foam adhesive sticker around the area marking part, and sticking an adhesive tape on the edge to prevent the foam adhesive sticker from falling on other parts during pouring; preparing a phosphorus-magnesium material, preparing phosphorus-magnesium mortar required by the phosphorus-magnesium material self-leveling surface layer 3 in advance, and detecting the fluidity and the setting time of the phosphorus-magnesium mortar until the requirements are met; preparing a phosphorus-magnesium material according to a required proportion; and (3) calculating the using amount of the phosphorus-magnesium material according to the areas of the surface decoration and the marking part in the blocks, stirring by using a handheld electric stirrer because the pouring amount is less, and leveling and defoaming by using a small defoaming roller after pouring.
4.4 construction of other parts in blocks
Before pouring, removing the surface decoration and arranging the foam adhesive sticker on the periphery of the area marking part, preparing a phosphorus-magnesium material, preparing phosphorus-magnesium mortar required by the phosphorus-magnesium material self-leveling surface layer 3 in advance, and detecting the fluidity and the setting time of the phosphorus-magnesium mortar until the requirements are met; preparing a phosphorus-magnesium material according to a required proportion; adding the mixture into a mortar spraying machine within 2 minutes, uniformly stirring for 5 minutes, transferring the stirred phosphorus-magnesium self-leveling mortar into a conveying hopper, pouring the phosphorus-magnesium self-leveling mortar from the lowest part of the common part by the conveying hopper, paying attention to a marking line on a column at the moment of pouring, and just soaking the mortar in the marking line during pouring; after the 500mm wide-range mortar flowing out of the phosphorus-magnesium self-leveling mortar is automatically leveled, an operator who holds the roller and wears the long-tube rubber shoes by feet gently combs the surface of the phosphorus-magnesium self-leveling mortar for the first time, and combs and derives air bubbles in the mortar through gentle rolling, so that the aim of assisting leveling is fulfilled. After the phosphorus-magnesium self-leveling mortar flows out of the range of 1000mm wide, an operator holding the roller and wearing nail shoes by feet gently combs the surface of the gypsum self-leveling mortar for the second time, and the operator gently screeds and presses the surface of the gypsum self-leveling mortar to comb the surface of the gypsum self-leveling mortar.
And after the construction of the block is finished, the construction of the next block is carried out, and the whole area is constructed in sequence.
5. Maintaining
And after the surface of the phosphorus-magnesium self-leveling mortar is initially set, naturally curing for 3 hours.
6. Polishing and waxing
And after natural curing for 3 hours, polishing and grinding the phosphorus-magnesium material by using a resin polishing machine when the compressive strength of 3 layers of the self-leveling surface of the phosphorus-magnesium material reaches 25MPa, and sucking the ground residue and dust by using a dust collector. Then coating compact wax to play the role of water resistance and brightness. The expansion joint is reserved at the position of the expansion joint of the original base layer.
Further, the gypsum self-leveling mortar is prepared from the following raw materials in parts by weight: 10000 parts of mixed-phase phosphogypsum, 10 parts of additive and 4000 parts of aggregate; the mixed-phase phosphogypsum is obtained by calcining phosphogypsum at the high temperature of 850 ℃ and grinding the calcined phosphogypsum to pass through a 400-mesh sieve; the additive is a compound retarder of citric acid, sodium tripolyphosphate, sodium hexametaphosphate and disodium ethylene diamine tetraacetate; the preparation method comprises the following steps: uniformly mixing the mixed-phase phosphogypsum, the additive and the aggregate, adding the mixture into a stirring water stirrer, and fully stirring to obtain gypsum self-leveling mortar; the deviation allowed by the flatness of the gypsum self-leveling layer is +/-2 mm, and the compressive strength of the gypsum self-leveling layer is more than 6MPa after 24 hours of construction; the initial fluidity of the gypsum self-leveling mortar is 135 +/-5 mm, the fluidity is 300mm, and the setting time is 1.5 h.
Further, the initial fluidity of the phosphorus-magnesium material surface layer mortar is 135 +/-5 mm, the setting time is 1.5h, and the phosphorus-magnesium self-leveling mortar is prepared from the following raw materials in parts by weight: 120 parts of magnesium phosphate cement, 15 parts of an additive, 20 parts of an admixture, 5 parts of a pigment and 120 parts of an aggregate; the magnesium phosphate cement is a mixture of dead-burned magnesium oxide and monoammonium phosphate according to a mass ratio of 4.5: 1; the additive is one or more of borax, defoaming agent and water reducing agent; the admixture is a mixture of fly ash and metakaolin according to a mass ratio of 4: 1; the pigment is a synthetic inorganic pigment with the fineness of 400 meshes; the preparation method comprises the following steps: and uniformly mixing the magnesium phosphate cement, the admixture, the pigment and the aggregate, adding water for stirring and the additive, and fully stirring in a stirrer to obtain the magnesium phosphate self-leveling mortar.
In the step 3, the initial fluidity of the gypsum self-leveling layer 2 is 135 +/-5 mm, and the setting time is 1.5 h; the gypsum self-leveling layer 2 is gypsum self-leveling mortar, and the gypsum self-leveling layer 2 constructed by gypsum self-leveling construction is accurate in size, extremely high in levelness, free of hollowing and cracking, easy and convenient to operate and high in efficiency; pumping construction is carried out by adopting a shotcrete machine, and the daily floor can reach 1000 m; thereby realizing the high-precision and quick leveling of the gypsum self-leveling layer 2 and ensuring that the deviation allowed by the leveling layer flatness is 1 mm.
In the step 4, water is added according to the specified water consumption and stirred uniformly, so that the initial fluidity of the phosphorus-magnesium material surface layer mortar is 135 +/-5 mm, and the setting time is 1.5 h. On the basis of meeting the fluidity, the water consumption is required to be reduced as much as possible, the higher the fluidity of the self-leveling mortar is, the higher the segregation and sedimentation degree is, and the lower the surface strength is; the smaller the fluidity, the higher the viscosity, the poorer the workability, and the bubbles on the surface were difficult to be eliminated. Firstly, batching materials according to the colors of the surface decoration and the marking area for construction, dividing the whole operation surface into blocks after the construction is finished, and constructing each block; according to the construction, on one hand, templates for block construction are saved, on the other hand, the construction procedure is simplified, the construction efficiency is improved, the construction period is saved, on the other hand, the surface decoration and the scribing part are not easy to be ground off, and the surface decoration and the scribing are carried out after the phosphorus-magnesium material self-flowing plane layer reaches certain strength; the construction of the self-leveling surface layer made of the phosphorus-magnesium material is carried out, the interface treatment is carried out between the gypsum self-leveling layer 2 and the self-leveling surface layer 3 of the phosphorus-magnesium material of the conventional floor, the construction of the self-leveling surface layer made of the phosphorus-magnesium material can be carried out after the interface agent is dried for 24 hours, otherwise, the interlayer bonding strength is weakened, cold joints or horizontal construction joints exist, and the service life of the ground is greatly shortened; the gypsum self-leveling layer 2 is gypsum self-leveling mortar, strong bonding strength exists between layers without interface treatment, the phosphorus and magnesium materials can form oxide films on the surfaces of contacts and the surfaces of the contacts, the oxide films have good associativity, the phosphorus and magnesium materials can be constructed at any time, and construction joints cannot be formed.
In the steps 3 and 4, the shrinkage of the gypsum self-leveling mortar and the phosphorus-magnesium self-leveling mortar is lower than 0.05 percent, the gypsum self-leveling mortar and the phosphorus-magnesium self-leveling mortar are basically not shrunk, the two materials have good compatibility, and cracks and hollows are not generated.
In the step 6, when the compressive strength of the self-leveling surface layer 3 of the phosphorus-magnesium material reaches 25MPa, polishing and grinding are carried out by using a resin polishing machine, a floating slurry layer on the surface can be polished, a dense layer is leaked, and the self-leveling surface layer is not easy to damage; the coating of the dense wax plays a role in water resistance and brightness.
Comparative example 1
According to the method in patent application CN201810948957.7, phosphogypsum self-leveling terrace mortar is prepared into the building indoor terrace.
Comparative example 2
According to the examples in patent application CN 201410275095.8.
Comparative example 3
According to the examples in patent application CN 201310577961.4.
Comparative example 4
According to the examples in patent application CN 201510814221.7.
Comparative example 5
According to the examples in patent application CN 201810195535.7.
The performance of the indoor composite floor based on the phosphorus-magnesium material and the self-leveling gypsum prepared in the embodiment 1 and the performance of the composite floor prepared in the comparative example 1 are detected, and the detection results are shown in the following table 2.
TABLE 2
As can be seen from the experimental data in Table 2, the terrace obtained in the embodiment 1 is more wear-resistant than the terrace obtained in the comparison example 1, the compressive strength is higher, and the required maintenance time is shorter.
The ground prepared by the method of the embodiment 1-2 and the method of the comparative example 1-5 is detected, and the detection items are as follows: compressive strength, abrasion resistance ratio, 500m2The time of putting into service, the presence or absence of the construction joint, flatness error and bonding strength were compared, and the experimental results are shown in table 3 below.
TABLE 3
As can be seen from the experimental data in Table 3, the indoor composite floor prepared by the method has the advantages of compressive strength, wear resistance ratio and 500m2The time of putting into service, whether have the production of construction joint, roughness error, bonding strength etc. performance are good, and comprehensive properties is superior to the comparison example.
In summary, the invention provides an indoor composite floor using self-leveling gypsum as a leveling layer and a phosphorus-magnesium material as a self-leveling surface layer, aiming at the problems that a self-leveling material using epoxy and polyurethane as base materials is expensive in manufacturing cost and easy to crust, and a self-leveling material using gypsum as a base material is poor in water resistance and wear resistance, so that the application of the self-leveling material is limited.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (10)
1. An indoor composite ground based on phosphorus magnesium material and self-leveling gypsum, its characterized in that: the indoor composite floor based on the phosphorus-magnesium material and gypsum self-leveling comprises a concrete base layer (1), and sequentially comprises the concrete base layer (1), a gypsum self-leveling layer (2) and a phosphorus-magnesium material self-leveling plane layer (3) from bottom to top, wherein the gypsum self-leveling layer (2) is positioned between the concrete base layer (1) and the phosphorus-magnesium material self-leveling plane layer (3); the construction method of the indoor composite ground comprises the following steps:
carrying out primary layer treatment: chiseling the concrete base layer leakage part into a V shape, wherein the chiseling depth is 4.8-5.2 cm, tightly plugging with phosphorus and magnesium repair mortar, and checking whether leakage exists after drying;
secondly, gypsum self-leveling course construction: firstly, automatically paving a leveling layer by using mixed-phase phosphogypsum-based self-leveling, and then performing gypsum self-leveling layer construction, wherein the construction comprises the procedures of level control, pouring, paving and leveling layer maintenance; when pouring, firstly preparing gypsum self-leveling mortar required by the gypsum self-leveling layer, and pouring;
construction of a self-leveling surface layer of the phosphorus-magnesium material: after the compressive strength of the gypsum self-leveling layer reaches more than 2.5MPa, carrying out construction of a phosphorus-magnesium material self-leveling surface layer, wherein the construction comprises the working procedures of setting of a partitioning seam, horizontal control, pouring of a surface decoration and marking part and pouring of other parts; pouring the surface decoration and the marking part: pre-preparing the phosphorus-magnesium self-leveling mortar required by the surface decoration and the marking part, and pouring; pouring other parts: adding the phosphorus-magnesium material into a mortar sprayer within 1.5-2.3 min, stirring for 4.8-5.3 min to form phosphorus-magnesium self-leveling mortar, and pouring;
and fourthly, maintenance: after initial setting on the surface of the phosphorus-magnesium self-leveling mortar, naturally curing for 2-3 h;
polishing and waxing: and when the base layer is maintained to have the compressive strength of 24-27 MPa, polishing and grinding the base layer by using a resin polishing machine, sucking and removing the ground residues, and then coating dense wax on the base layer, wherein the expansion joint is left at the position of the expansion joint of the original base layer.
2. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: the gypsum self-leveling layer (2) is formed by integrating gypsum self-leveling mortar which permeates into the concrete base layer (1) during pouring.
3. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: the phosphorus-magnesium material self-leveling layer (3) is formed by the way that phosphorus-magnesium self-leveling mortar permeates into the gypsum self-leveling layer (2) during pouring and is combined with the gypsum self-leveling layer into a whole.
4. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: the thickness of the gypsum self-leveling layer (2) and the thickness of the phosphorus-magnesium material self-leveling plane layer (3) are respectively 20-30 mm and 2-6 mm.
5. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: in the second step, the gypsum self-leveling mortar is prepared from the following raw materials in parts by weight: 8000-10000 parts of mixed-phase phosphogypsum, 5-10 parts of additive and 0-4000 parts of aggregate; the mixed-phase phosphogypsum is obtained by calcining phosphogypsum at a high temperature of 800-850 ℃ and grinding the calcined phosphogypsum to 200-400 meshes; the additive is a compound retarder of citric acid, sodium tripolyphosphate, sodium hexametaphosphate and disodium ethylene diamine tetraacetate; the preparation method comprises the following steps: and uniformly mixing the mixed-phase phosphogypsum, the additive and the aggregate, adding the mixture into a stirring water stirrer, and fully stirring to obtain the gypsum self-leveling mortar.
6. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: and step two, the deviation allowed by the flatness of the gypsum self-leveling layer is +/-2 mm, and the compressive strength of the gypsum self-leveling layer is more than 6MPa after 24 hours of construction.
7. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: and secondly, before pouring, the initial fluidity of the gypsum self-leveling mortar is 135 +/-5 mm, the fluidity is 260-300 mm, and the setting time is 1-1.5 h.
8. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: in the second step and the third step, the shrinkage of the gypsum self-leveling mortar and the phosphorus-magnesium self-leveling mortar is lower than 0.05 percent.
9. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: and step three, before pouring, the initial fluidity of the phosphorus-magnesium material surface layer mortar is 135 +/-5 mm, and the setting time is 0.5-1.5 h.
10. The indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum according to claim 1, wherein: in the third step, the phosphorus-magnesium self-leveling mortar is prepared from the following raw materials in parts by weight: 80-120 parts of magnesium phosphate cement, 2-15 parts of an additive, 0-20 parts of an admixture, 0-5 parts of a pigment and 40-120 parts of an aggregate; the magnesium phosphate cement is a mixture of dead-burned magnesium oxide and monoammonium phosphate according to a mass ratio of 1-4.5: 1; the additive is one or more of borax, defoaming agent and water reducing agent; the admixture is a mixture of fly ash and metakaolin according to a mass ratio of 2-4: 1; the pigment is a synthetic inorganic pigment with the fineness of 100-400 meshes; the preparation method comprises the following steps: and uniformly mixing the magnesium phosphate cement, the admixture, the pigment and the aggregate, adding water for stirring and the additive, and fully stirring in a stirrer to obtain the magnesium phosphate self-leveling mortar.
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| CN201910350561.7A Active CN110130615B (en) | 2019-04-28 | 2019-04-28 | Indoor composite floor based on phosphorus-magnesium material and self-leveling gypsum and construction method thereof |
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| CN103274659B (en) * | 2013-05-13 | 2015-05-27 | 武汉理工大学 | Ardealite-based self-leveling material |
| CN108947464B (en) * | 2018-07-19 | 2021-06-11 | 贵州磷镁材料有限公司 | Ground surface layer based on phosphorus-magnesium material and construction process thereof |
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