CN111943627A - Beta phosphogypsum-based self-leveling mortar and preparation method thereof - Google Patents
Beta phosphogypsum-based self-leveling mortar and preparation method thereof Download PDFInfo
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- CN111943627A CN111943627A CN202010871846.8A CN202010871846A CN111943627A CN 111943627 A CN111943627 A CN 111943627A CN 202010871846 A CN202010871846 A CN 202010871846A CN 111943627 A CN111943627 A CN 111943627A
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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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-hemihydrate
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/003—Methods for mixing
- B28C5/006—Methods for mixing involving mechanical aspects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
- B28C5/023—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing using a flexible mat or bag
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/02—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing
- B28C5/06—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions without using driven mechanical means effecting the mixing the mixing being effected by the action of a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
- B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The scheme discloses a beta phosphogypsum-based self-leveling mortar in the field of building materials, which comprises the following raw materials in parts by weight: 55-62 parts of beta-semi-hydrated phosphogypsum powder, 1-3 parts of silicate white cement, 35-40 parts of quartz sand, 0.15-0.25 part of organic silicon waterproof agent, 0.3-0.8 part of latex powder, 0.2-0.4 part of water reducing agent, 0.15-0.3 part of defoaming agent, 0.1-0.25 part of vegetable protein retarder and 0.1-0.3 part of cellulose with the viscosity of more than 20 ten thousand units. The preparation method comprises the following steps: firstly, preparing raw materials in parts by weight; secondly, mixing the beta-semi-hydrated phosphogypsum powder, silicate white cement and quartz sand to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m2More than kg; thirdly, after fine grindingThe mixture is uniformly mixed with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar. The beta phosphogypsum-based self-leveling mortar has the advantages of high strength, good fluidity, good construction property, good water resistance, no bubbling and layering, environmental protection, energy conservation and the like.
Description
Technical Field
The invention belongs to the field of building materials, and particularly relates to beta phosphogypsum-based self-leveling mortar and a preparation method thereof.
Background
The invention aims to provide beta phosphogypsum-based self-leveling mortar and a preparation method thereof, so as to improve the strength and the fluidity of the mortar.
The beta phosphogypsum-based self-leveling mortar comprises the following raw materials in parts by weight: 55-62 parts of beta-semi-hydrated phosphogypsum powder, 1-3 parts of silicate white cement, 35-40 parts of quartz sand, 0.15-0.25 part of organic silicon waterproof agent, 0.3-0.8 part of latex powder, 0.2-0.4 part of water reducing agent, 0.15-0.3 part of defoaming agent, 0.1-0.25 part of vegetable protein retarder and 0.1-0.3 part of cellulose with the viscosity of more than 20 ten thousand units.
The beneficial effect of this scheme: the beta phosphogypsum self-leveling mortar produced by the formula has the advantages of high strength, good fluidity, good construction property, good water resistance, no foaming, no layering, environmental protection and energy conservation.
Further, the beta phosphogypsum-based self-leveling mortar comprises the following raw materials in parts by weight: 59 parts of beta-semi-hydrated phosphogypsum powder, 2 parts of silicate white cement, 38 parts of quartz sand, 0.15 part of organic silicon waterproof agent, 0.3 part of latex powder, 0.2 part of water reducing agent, 0.15 part of defoaming agent, 0.1 part of plant protein retarder and 0.1 part of cellulose with the viscosity of more than 20 ten thousand units.
Further, the beta phosphogypsum-based self-leveling mortar comprises the following raw materials in parts by weight: 55 parts of beta-semi-hydrated phosphogypsum powder, 3 parts of silicate white cement, 40 parts of quartz sand, 0.25 part of organic silicon waterproof agent, 0.5 part of latex powder, 0.4 part of water reducing agent, 0.3 part of defoaming agent, 0.25 part of plant protein retarder and 0.3 part of cellulose with the viscosity of more than 20 ten thousand units.
Further, the beta phosphogypsum-based self-leveling mortar comprises the following raw materials in parts by weight: 62 parts of beta-semi-hydrated phosphogypsum powder, 1 part of silicate white cement, 35 parts of quartz sand, 0.2 part of organic silicon waterproof agent, 0.8 part of latex powder, 0.3 part of water reducing agent, 0.2 part of defoaming agent, 0.25 part of plant protein retarder and 0.25 part of cellulose with the viscosity of more than 20 ten thousand units.
In order to further improve the strength and the fluidity of the beta phosphogypsum-based self-leveling mortar, the application also provides a preparation method of the beta phosphogypsum-based self-leveling mortar, which comprises the following steps:
step one, preparing raw materials according to parts by weight;
step two, mixing the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m2More than kg;
and step three, uniformly mixing the finely ground mixture with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar.
The beneficial effect of this scheme: the mixture is finely ground, so that the specific surface area of the mixture is more than or equal to 650m2Per kg; the fluidity of the beta phosphogypsum-based self-leveling mortar can be obviously improved, and the strength and the fluidity of the mortar are improved.
Further, a mixing device is adopted when mixing the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand, the mixing device comprises a base, a motor, a coupler, a connecting rod, a mixing box, an adjusting mechanism and a closed air bag, the air bag is made of elastic materials, an air hole is formed in the air bag, a sealing plug is arranged at the air hole, the adjusting mechanism comprises a screw rod and a plurality of limiting rods, the limiting rods are respectively positioned on two sides of the screw rod, material boxes are connected to the limiting rods in a sliding mode, and a raw material box is sleeved on the screw rod in a threaded mode; the motor is arranged on the base, and an output shaft of the motor is fixedly connected with the screw rod through the coupler; one end of the screw rod, which is far away from the motor, is rotatably connected to the outer wall of the mixing box, two ends of the limiting rod are respectively and fixedly connected to the base and the mixing box, the limiting rods and the screw rod are positioned on the same plane, the limiting rod is obliquely arranged, and one end of the limiting rod, which is connected with the base, is higher than one end of the limiting rod, which is connected with the mixing box; the material tank and the raw material tank are both provided with through holes, and the connecting rod is movably connected in the through holes of the material tank and the raw material tank; the air bag is fixed on one side of the mixing box facing the base, the upper end and the lower end of the mixing box are provided with baffles, and the air bag is positioned between the two baffles and is in contact with the baffles; the bottoms of the material box and the raw material box are respectively fixed with an extrusion plate for extruding the air bag; the material tank and the raw material tank are communicated with a material pipe, the discharge end of the material pipe is positioned in the mixing tank, the discharge ends of the material pipes on two sides of the screw are opposite, the discharge end of the material pipe connected with the raw material tank is positioned between the discharge ends of the material pipes on two sides of the screw, the air bag is communicated with two vent pipes, and the vent pipes are provided with one-way vent valves; the material pipe is sleeved with an air guide pipe, the air guide pipe is positioned at the discharge end of the material pipe, a cavity is arranged in the wall body of the air guide pipe, one ends of the two air guide pipes, which are far away from the air bag, are respectively communicated with the cavities of the air guide pipes on the two sides of the screw rod, and one end of the air guide pipe, which is close to the discharge end of the material pipe, is annularly provided with a plurality of air; and the material tank, the raw material tank and the mixing tank are all provided with a feeding opening and a discharging opening.
When the device is used, the beta-hemihydrate phosphogypsum powder, the silicate white cement and the quartz sand are respectively placed in the raw material box and the material boxes on two sides of the screw, the motor is started to drive the screw to rotate, the screw rotates to drive the raw material box connected with the screw to move on the screw, the raw material box moves to drive the connecting rod, the connecting rod drives the raw material box connected with the connecting rod to move, discharge openings in the raw material box and the material boxes are opened, and the beta-hemihydrate phosphogypsum powder, the silicate white cement and the quartz sand respectively flow into the mixing box from the discharge openings connecting the raw material box and the material boxes through the material pipes. The threshold value of the one-way air outlet valve is set as the internal air pressure value of the air bag at the initial stage; in the moving process of the material box, the material box and the extrusion plate connected with the material box extrude the air bag, gas in the air bag enters the cavity of the air guide pipe through the air guide pipe and is blown to beta-semi-hydrated phosphogypsum powder, silicate white cement or quartz sand from the air outlet hole of the air guide pipe, so that the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand are diffused under the action of the gas at the air outlet, and the mixture of the beta-semi-hydrated phosphogypsum powder, the silicate white cement and; extruding out the air in the air bag; the seal plug is taken down, external air enters the air bag, and the air bag can be continuously used after being recovered; the air bag can also be supplemented with air by external inflation.
Further, when the mixture after fine grinding is mixed with other raw materials, a mixing device is adopted for mixing. When the mixing device stirs the mixture after the accurate grinding and other raw materials, because gas can blow multiple raw materials and make its diffusion, and then make the mixture between each raw materials more even.
Drawings
FIG. 1 is a front view of a kneading apparatus according to the present invention;
FIG. 2 is a top cross-sectional view of FIG. 1;
fig. 3 is an enlarged view of a portion a in fig. 2.
Detailed Description
The following is further detailed by way of specific embodiments:
description of reference numerals: the device comprises a base 1, a coupler 2, a limiting rod 3, a connecting rod 4, a material tank 5, an air bag 6, a baffle 7, a mixing tank 8, an extrusion plate 9, a screw 10, a material pipe 11, a vent pipe 12, an air guide pipe 13, a cavity 131, an air outlet 132, a raw material tank 14 and a motor 15.
The blending device is basically as shown in attached figures 1-3, and comprises a base 1, a motor 15, a coupler 2, a connecting rod 4, a mixing box 8, an adjusting mechanism and a closed air bag 6, wherein the air bag 6 is made of an elastic material, an air hole is formed in the air bag 6, and a sealing plug is arranged at the air hole; the adjusting mechanism comprises a screw 10 and a plurality of limiting rods 3, the limiting rods 3 are respectively positioned at two sides of the screw 10, the limiting rods 3 are all connected with a material box 5 in a sliding manner, and a raw material box 14 is sleeved on the screw 10 in a threaded manner; the top of the base 1 is provided with a groove, the motor 15 is arranged in the groove of the base 1, and an output shaft of the motor 15 is fixedly connected with the screw 10 through the coupler 2; one end of the screw 10, far away from the motor 15, is rotatably connected to the outer wall of the mixing box 8, two ends of the limiting rod 3 are fixedly connected to the base 1 and the mixing box 8 respectively, the limiting rods 3 and the screw 10 are positioned on the same plane, the limiting rods 3 are obliquely arranged, and one end, connected with the base 1, of the limiting rod 3 is higher than one end, connected with the mixing box 8, of the limiting rod 3; through holes are formed in the material tank 5 and the raw material tank 14, and the connecting rod 4 is movably connected in the through holes of the material tank 5 and the raw material tank 14; the air bag 6 is fixed on one side of the mixing box 8 facing the base 1, the upper end and the lower end of the mixing box 8 are provided with the baffles 7, and the air bag 6 is positioned between the two baffles 7 and is in contact with the baffles 7; the bottoms of the material tank 5 and the raw material tank 14 are both fixed with an extrusion plate 9 for extruding the air bag 6; the material tank 5 and the raw material tank 14 are communicated with a material pipe 11, the discharge end of the material pipe 11 is positioned in the mixing tank 8, the discharge ends of the material pipes 11 on the two sides of the screw 10 are opposite, the air bag 6 is communicated with two vent pipes 12, and the vent pipes 12 are provided with one-way air outlet valves; the material pipe 11 is sleeved with an air duct 13, the air duct 13 is positioned at the discharge end of the material pipe 11, a cavity 131 is arranged in the wall body of the air duct 13, one ends of the two air ducts 12 far away from the air bag 6 are respectively communicated with the cavities 131 of the air ducts 13 at two sides of the screw 10, one end of the air duct 13 close to the discharge end of the material pipe 11 is annularly provided with a plurality of air outlet holes 132, and the air outlet holes 132 are communicated with the cavity 131; the material tank 5, the raw material tank 14 and the mixing tank 8 are all provided with a feeding opening and a discharging opening.
Example 1: a preparation method of beta phosphogypsum-based self-leveling mortar comprises the following steps:
preparing raw materials in parts by weight, specifically: 59 parts of beta-semi-hydrated phosphogypsum powder, 2 parts of silicate white cement, 38 parts of quartz sand, 0.15 part of organic silicon waterproof agent, 0.3 part of latex powder, 0.2 part of water reducing agent, 0.15 part of defoaming agent, 0.1 part of plant protein retarder and 0.1 part of cellulose with the viscosity of more than 20 ten thousand units;
step two, mixing the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand by using a mixing device to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m2Over/kg, when finely grinding, adding the mixture into a ball mill for grinding, and screening in an airflow classifier to obtain the product with the specific surface area of more than or equal to 650m2A mixture of/kg; the specific surface area is less than 650m2Adding the particles of/kg into the ball mill again for grinding, repeating the steps for three times to obtain the product with the specific surface area of more than or equal to 650m2Per kg of mix;
step three, the specific surface area after fine grinding is more than or equal to 650m through a mixing device2And uniformly mixing the/kg mixture with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar.
Example 2: a preparation method of beta phosphogypsum-based self-leveling mortar comprises the following steps:
preparing raw materials in parts by weight, specifically: 55 parts of beta-semi-hydrated phosphogypsum powder, 3 parts of silicate white cement, 40 parts of quartz sand, 0.25 part of organic silicon waterproof agent, 0.5 part of latex powder, 0.4 part of water reducing agent, 0.3 part of defoaming agent, 0.25 part of plant protein retarder and 0.3 part of cellulose with the viscosity of more than 20 ten thousand units;
step two, mixing the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand by using a mixing device to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m2Over/kg, when finely grinding, adding the mixture into a ball mill for grinding, and screening in an airflow classifier to obtain the product with the specific surface area of more than or equal to 650m2A mixture of/kg; the specific surface area is less than 650m2Adding the particles of/kg into the ball mill again for grinding, repeating the steps for three times to obtain the product with the specific surface area of more than or equal to 650m2Per kg of mix;
step three, the specific surface area after fine grinding is more than or equal to 650m through a mixing device2And uniformly mixing the/kg mixture with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar.
Example 3: a preparation method of beta phosphogypsum-based self-leveling mortar comprises the following steps:
preparing raw materials in parts by weight, specifically: comprises the following raw materials in parts by weight: 62 parts of beta-semi-hydrated phosphogypsum powder, 1 part of silicate white cement, 35 parts of quartz sand, 0.2 part of organic silicon waterproof agent, 0.8 part of latex powder, 0.3 part of water reducing agent, 0.2 part of defoaming agent, 0.25 part of plant protein retarder and 0.25 part of cellulose with the viscosity of more than 20 ten thousand units;
step two, mixing the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand by using a mixing device to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m2Over/kg, when finely grinding, adding the mixture into a ball mill for grinding, and screening in an airflow classifier to obtain the product with the specific surface area of more than or equal to 650m2A mixture of/kg; the specific surface area is less than 650m2Adding the particles of/kg into the ball mill again for grinding, repeating the steps for three times to obtain the product with the specific surface area of more than or equal to 650m2Per kg of mix;
step three, the specific surface area after fine grinding is more than or equal to 650m through a mixing device2And uniformly mixing the/kg mixture with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar.
In examples 1 to 3, the weight parts of the raw materials each represent 1 kg.
Comparative example 1: the beta phosphogypsum-based self-leveling mortar was prepared according to the method in patent example 3 with the application number "CN 201910804283.8" and the patent name "a beta phosphogypsum-based self-leveling mortar and its preparation method".
Comparative example 2: comparative example 2 differs from example 1 only in that: when the beta phosphogypsum-based self-leveling mortar is prepared, the raw materials are directly and uniformly mixed by a uniformly mixing device.
In embodiment 1 ~ 3 and comparative example 2, when using the mixing device to carry out the mixing to each raw materials, will correspond the raw materials of required mixing and place respectively in raw materials case 14 and the material case 5 of raw materials case 14 both sides, open the discharge opening, the starter motor can.
The beta phosphogypsum-based self-leveling mortar provided by the examples 1, 2, 3, 1 and 2 is subjected to fluidity, 30min fluidity loss, initial setting time, final setting time, shrinkage rate, 24h bending resistance, 24h compressive strength, oven dry bending resistance strength, oven dry compressive strength, tensile bonding strength and other performance indexes according to JC/T1023 2007 gypsum-based self-leveling mortar, and the test results are shown in the following table.
From the comparative data of the beta phosphogypsum-based self-leveling mortar prepared in the embodiments 1-3 and the comparative example 2, the strength and the fluidity of the prepared beta phosphogypsum-based self-leveling mortar are greatly improved by finely grinding the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand. The data of the beta phosphogypsum-based self-leveling mortar prepared in the comparative example 2 and the comparative example 1 show that the performance of the beta phosphogypsum-based self-leveling mortar prepared in the comparative example 2 is improved compared with that of the comparative example 1.
The foregoing is merely an example of the present invention and common general knowledge of known specific structures and features of the embodiments is not described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. The beta phosphogypsum-based self-leveling mortar is characterized by comprising the following components in parts by weight: comprises the following raw materials in parts by weight: 55-62 parts of beta-semi-hydrated phosphogypsum powder, 1-3 parts of silicate white cement, 35-40 parts of quartz sand, 0.15-0.25 part of organic silicon waterproof agent, 0.3-0.8 part of latex powder, 0.2-0.4 part of water reducing agent, 0.15-0.3 part of defoaming agent, 0.1-0.25 part of vegetable protein retarder and 0.1-0.3 part of cellulose with the viscosity of more than 20 ten thousand units.
2. The beta phosphogypsum-based self-leveling mortar according to claim 1, which is characterized in that: comprises the following raw materials in parts by weight: 59 parts of beta-semi-hydrated phosphogypsum powder, 2 parts of silicate white cement, 38 parts of quartz sand, 0.15 part of organic silicon waterproof agent, 0.3 part of latex powder, 0.2 part of water reducing agent, 0.15 part of defoaming agent, 0.1 part of plant protein retarder and 0.1 part of cellulose with the viscosity of more than 20 ten thousand units.
3. The beta phosphogypsum-based self-leveling mortar according to claim 1, which is characterized in that: comprises the following raw materials in parts by weight: 55 parts of beta-semi-hydrated phosphogypsum powder, 3 parts of silicate white cement, 40 parts of quartz sand, 0.25 part of organic silicon waterproof agent, 0.5 part of latex powder, 0.4 part of water reducing agent, 0.3 part of defoaming agent, 0.25 part of plant protein retarder and 0.3 part of cellulose with the viscosity of more than 20 ten thousand units.
4. The beta phosphogypsum-based self-leveling mortar according to claim 1, which is characterized in that: comprises the following raw materials in parts by weight: 62 parts of beta-semi-hydrated phosphogypsum powder, 1 part of silicate white cement, 35 parts of quartz sand, 0.2 part of organic silicon waterproof agent, 0.8 part of latex powder, 0.3 part of water reducing agent, 0.2 part of defoaming agent, 0.25 part of plant protein retarder and 0.25 part of cellulose with the viscosity of more than 20 ten thousand units.
5. The preparation method of the beta phosphogypsum-based self-leveling mortar according to any one of claims 1 to 4, which is characterized by comprising the following steps: the method comprises the following steps:
step one, preparing raw materials according to parts by weight;
step two, mixing the beta-semi-hydrated phosphogypsum powder, the silicate white cement and the quartz sand to obtain a mixture, and then finely grinding the mixture to ensure that the specific surface area of the mixture is more than or equal to 650m2More than kg;
and step three, uniformly mixing the finely ground mixture with other raw materials to obtain the beta phosphogypsum-based self-leveling mortar.
6. The preparation method of the beta phosphogypsum-based self-leveling mortar according to claim 5, which is characterized by comprising the following steps: the mixing device is adopted when mixing the beta-hemihydrate phosphogypsum powder, the silicate white cement and the quartz sand, and comprises a base, a motor, a coupler, a connecting rod, a mixing box, an adjusting mechanism and a closed air bag, wherein the air bag is made of an elastic material, an air hole is formed in the air bag, a sealing plug is arranged at the air hole, the adjusting mechanism comprises a screw rod and a plurality of limiting rods, the limiting rods are respectively positioned at two sides of the screw rod, the material boxes are respectively connected onto the limiting rods in a sliding manner, and a raw material box is sleeved on the screw rod in a threaded manner; the motor is arranged on the base, and an output shaft of the motor is fixedly connected with the screw rod through the coupler; one end of the screw rod, which is far away from the motor, is rotatably connected to the outer wall of the mixing box, two ends of the limiting rod are respectively and fixedly connected to the base and the mixing box, the limiting rods and the screw rod are positioned on the same plane, the limiting rod is obliquely arranged, and one end of the limiting rod, which is connected with the base, is higher than one end of the limiting rod, which is connected with the mixing box; the material tank and the raw material tank are both provided with through holes, and the connecting rod is movably connected in the through holes of the material tank and the raw material tank; the air bag is fixed on one side of the mixing box facing the base, the upper end and the lower end of the mixing box are provided with baffles, and the air bag is positioned between the two baffles and is in contact with the baffles; the bottoms of the material box and the raw material box are respectively fixed with an extrusion plate for extruding the air bag; the material tank and the raw material tank are communicated with a material pipe, the discharge end of the material pipe is positioned in the mixing tank, the discharge ends of the material pipes on two sides of the screw are opposite, the discharge end of the material pipe connected with the raw material tank is positioned between the discharge ends of the material pipes on two sides of the screw, the air bag is communicated with two vent pipes, and the vent pipes are provided with one-way vent valves; the material pipe is sleeved with an air guide pipe, the air guide pipe is positioned at the discharge end of the material pipe, a cavity is arranged in the wall body of the air guide pipe, one ends of the two air guide pipes, which are far away from the air bag, are respectively communicated with the cavities of the air guide pipes on the two sides of the screw rod, and one end of the air guide pipe, which is close to the discharge end of the material pipe, is annularly provided with a plurality of air; and the material tank, the raw material tank and the mixing tank are all provided with a feeding opening and a discharging opening.
7. The preparation method of the beta phosphogypsum-based self-leveling mortar according to claim 6, which is characterized by comprising the following steps: and when the mixture after fine grinding is mixed with other raw materials, a mixing device is adopted for mixing.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112592145A (en) * | 2020-12-31 | 2021-04-02 | 成都建工赛利混凝土有限公司 | Preparation method of early-strength phosphogypsum expansion mortar |
| CN114907083A (en) * | 2021-02-07 | 2022-08-16 | 广东山众建筑科技有限公司 | Self-leveling material based on phosphogypsum base and preparation method thereof |
| CN115872659A (en) * | 2022-12-27 | 2023-03-31 | 沈阳泰丰特种混凝土有限公司 | Additive for prolonging opening time of ready-mixed mortar and mortar preparation method |
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| CN115872659A (en) * | 2022-12-27 | 2023-03-31 | 沈阳泰丰特种混凝土有限公司 | Additive for prolonging opening time of ready-mixed mortar and mortar preparation method |
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