CN114315302A - High-water-retention natural gypsum putty-free mortar and construction method thereof - Google Patents
High-water-retention natural gypsum putty-free mortar and construction method thereof Download PDFInfo
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- CN114315302A CN114315302A CN202210007466.9A CN202210007466A CN114315302A CN 114315302 A CN114315302 A CN 114315302A CN 202210007466 A CN202210007466 A CN 202210007466A CN 114315302 A CN114315302 A CN 114315302A
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- 239000010440 gypsum Substances 0.000 title claims abstract description 81
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 81
- 239000004570 mortar (masonry) Substances 0.000 title claims abstract description 67
- 206010016807 Fluid retention Diseases 0.000 title claims abstract description 33
- 238000010276 construction Methods 0.000 title claims abstract description 30
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 59
- 239000000843 powder Substances 0.000 claims abstract description 34
- 150000004683 dihydrates Chemical class 0.000 claims abstract description 29
- 238000000227 grinding Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000002994 raw material Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000428 dust Substances 0.000 claims description 36
- 238000004806 packaging method and process Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 239000004568 cement Substances 0.000 claims description 14
- 239000003795 chemical substances by application Substances 0.000 claims description 13
- 238000005507 spraying Methods 0.000 claims description 10
- 238000003756 stirring Methods 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 9
- 239000002562 thickening agent Substances 0.000 claims description 9
- 238000011068 loading method Methods 0.000 claims description 7
- 238000012858 packaging process Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 6
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 5
- 239000000440 bentonite Substances 0.000 claims description 5
- 229910000278 bentonite Inorganic materials 0.000 claims description 5
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 5
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 5
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 5
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 5
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 5
- 229910052744 lithium Inorganic materials 0.000 claims description 5
- 235000011837 pasties Nutrition 0.000 claims description 5
- 238000004064 recycling Methods 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 238000005303 weighing Methods 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000003912 environmental pollution Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000011426 gypsum mortar Substances 0.000 abstract description 7
- 238000005034 decoration Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 86
- 238000005452 bending Methods 0.000 description 6
- 238000003776 cleavage reaction Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 239000002932 luster Substances 0.000 description 6
- 230000007017 scission Effects 0.000 description 6
- 235000002639 sodium chloride Nutrition 0.000 description 6
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical compound [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 description 3
- 229910052925 anhydrite Inorganic materials 0.000 description 3
- PASHVRUKOFIRIK-UHFFFAOYSA-L calcium sulfate dihydrate Chemical compound O.O.[Ca+2].[O-]S([O-])(=O)=O PASHVRUKOFIRIK-UHFFFAOYSA-L 0.000 description 3
- 238000005234 chemical deposition Methods 0.000 description 3
- 238000011049 filling Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000010442 halite Substances 0.000 description 3
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000001103 potassium chloride Substances 0.000 description 3
- 235000011164 potassium chloride Nutrition 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910052600 sulfate mineral Inorganic materials 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Abstract
The invention relates to the technical field of preparation of interior wall decoration mortar, and discloses high-water-retention natural gypsum putty-free mortar, which comprises the following raw materials: the natural anhydrite is 200-mesh natural anhydrite powder, the content of calcium sulfate is greater than or equal to 90 percent, the whiteness is greater than or equal to 85 degrees, the natural dihydrate gypsum is 325-mesh natural dihydrate gypsum powder, and the content of calcium sulfate is greater than or equal to 95 percent; the whiteness is greater than or equal to 85 degrees. According to the putty-free gypsum mortar, the putty-free gypsum mortar is prepared by adopting the natural gypsum as a main material, the calcination treatment is not needed, only the physical grinding and mixing are needed, the preparation process is simple, the energy is saved, the putty-free gypsum mortar is healthy and environment-friendly, the traditional decoration method is fully replaced by the good water retention and the construction performance, the purpose of avoiding putty twice is achieved, and the effect of improving the construction efficiency is achieved.
Description
Technical Field
The invention relates to the technical field of preparation of interior wall decoration mortar, in particular to high-water-retention natural gypsum putty-free mortar and a construction method thereof.
Background
Classifying according to the position and the trend of the wall in the building: the wall body arranged along the periphery of the building is called an outer wall, the wall body surrounded by the outer wall is called an inner wall, the inner wall plays a role of separating a space indoors, the wall body which is not in direct contact with outdoor air is mostly a warm wall, and the plastering gypsum is mainly used for plastering various indoor wall surfaces and ceilings of the building.
At present, cases of preparing putty-free gypsum mortar by using desulfurized gypsum and chemical phosphogypsum exist, but the preparation of the putty-free gypsum mortar by using desulfurized gypsum and the chemical phosphogypsum belongs to the category of chemical by-product gypsum technically, so that semi-hydrated gypsum needs to be calcined in use, the cost is high, energy is not saved, and the phosphogypsum contains residual phosphoric acid, so that the requirement of interior wall decoration on ecological health is difficult to meet.
Therefore, the high-water-retention natural gypsum putty-free mortar and the construction method thereof are provided.
Disclosure of Invention
The invention mainly solves the technical problems in the prior art, and provides the natural gypsum putty-free mortar with high water retention and the construction method thereof.
In order to achieve the purpose, the invention adopts the following technical scheme that the natural gypsum putty-free mortar with high water retention property comprises the following raw materials: the natural anhydrite is 200-mesh natural anhydrite powder, the content of calcium sulfate is greater than or equal to 90 percent, the whiteness is greater than or equal to 85 degrees, the natural dihydrate gypsum is 325-mesh natural dihydrate gypsum powder, and the content of calcium sulfate is greater than or equal to 95 percent; the whiteness is greater than or equal to 85 degrees, the white cement adopts 42.5# white portland cement for improving the early strength and the later whiteness of the slurry, and the water-retaining agent is formed by mixing hydroxypropyl methyl cellulose and lithium bentonite according to a certain proportion.
A construction method of natural gypsum putty-free mortar with high water retention comprises the following working steps:
the first step is as follows: grinding natural gypsum;
the second step is that: mixing gypsum powder;
the third step: detecting a finished product;
the fourth step: and (6) packaging a finished product.
Preferably, in the first step, the natural anhydrite and the natural dihydrate gypsum are respectively sent to a grinding machine, the grinding is carried out through the grinding machine, a three-roller grinding machine is adopted, the natural anhydrite is added from a natural hopper consisting of a middle roller, a rear roller and two baffle plates, the materials are rapidly turned and sheared through opposite asynchronous rotation of the middle group and the rear group, the structural stress surface between the molecules of the raw materials is broken and crushed, and the high-fineness gypsum powder is obtained through high-speed secondary grinding of the middle roller and the front roller.
Preferably, in the second step, the natural anhydrite powder and the natural dihydrate gypsum powder are weighed and sent to a mixer for premixing for 1 minute, the white cement, the water-retaining agent, the thickening agent and the vitrified micro bubbles are poured into the mixer in sequence, and are uniformly mixed with the premixed materials in the mixer to obtain the finished product.
Preferably, in the third step, a proper amount of finished product is taken, water is added into the finished product, and the ratio of the finished product to the water is 1: 0.1, stir it, continuously stir, make the finished product be even pasty, detect the mobility and the setting time of finished product and the 3D intensity after the shaping detects, 3D intensity includes 3D compressive strength, 3D rupture strength and 3D tensile strength.
Preferably, the fourth step is to carry out bulk loading or bagging packaging according to the requirements of customers, the bulk loading process (through a discharger) loads the finished products into a tank truck, and the bagging packaging uses a packaging machine.
Preferably, in the fourth step, a cloth bag dust removal system is arranged at a feed inlet of the discharger for collecting dust generated in the bulk loading process, a cloth bag dust removal system is arranged at a feed inlet of the packaging machine for collecting dust generated in the bagging and packaging process, when finished products are bagged and packaged, the packaged finished products are conveyed to a stacker, and the stacker stacks the bagged and packaged finished products and places the stacked finished products in a warehouse.
Preferably, in the fourth step, a plurality of sets of automatic spraying devices are installed in the warehouse, each device is provided with a plurality of spray heads, the water quantity and the strength can be automatically adjusted, dust generated during sedimentation and stacking is prevented from flying to cause environmental pollution, dust collected by the cloth bag dust removal system and dust settled by spraying are subjected to centralized treatment, and the centralized dust is put back into the mixer for recycling.
Advantageous effects
The invention provides a high-water-retention natural gypsum putty-free mortar and a construction method thereof. The method has the following beneficial effects:
(1) the putty-free natural gypsum mortar with high water retention property and the construction method thereof adopt natural gypsum as a main material to prepare the putty-free gypsum mortar, do not need calcination treatment, only need physical grinding and mixing, have simple preparation process, save energy, are healthy and environment-friendly, fully replace the traditional decoration method through good water retention property and construction performance, achieve the purpose of avoiding putty twice through slurry extraction and finish surface light collection, achieve the effect of improving the construction efficiency, and simultaneously improve the environmental protection property of products.
(2) In the first embodiment, the finished product is detected, the setting time of the pasty finished product is observed, the initial setting time of the product is ensured to be more than or equal to 2 hours, the final setting time of the product is ensured to be more than or equal to 3 hours, the interval between the initial setting time and the final setting time is short, the 3D strength of the product is detected, the 3D strength comprises 3D compressive strength, 3D flexural strength and 3D tensile strength, and the maximum stress when a mortar hardening test body bears compressive failure is called the compressive strength of the mortar; the maximum stress when the mortar hardened specimen bears bending failure is called the breaking strength of the mortar; the maximum stress when the mortar hardening test body bears tensile failure is called the tensile strength of the mortar, the strength of the outer surface of the solidified product is detected to be more than or equal to 2.0MPa, and the water retention rate is detected to be more than or equal to 92 percent, so that the product is qualified, and is suitable for being used and constructed in spring and autumn.
(3) In the second embodiment, the finished product is detected, the setting time of the pasty finished product is observed, the initial setting time of the product is ensured to be more than or equal to 1.5h, the final setting time is more than or equal to 2h, the interval between the initial setting time and the final setting time is short, the 3D strength of the product is detected, the 3D strength comprises 3D compressive strength, 3D flexural strength and 3D tensile strength, and the maximum stress when a mortar hardening test body bears compressive failure is called the compressive strength of the mortar; the maximum stress when the mortar hardened specimen bears bending failure is called the breaking strength of the mortar; the maximum stress when the mortar hardening test body bears tensile failure is called the tensile strength of the mortar, the outer surface strength of the solidified product is detected to be greater than or equal to 3.0MPa, and the water retention rate is greater than or equal to 85 percent, so that the product is qualified, the product opening time is short, and the mortar hardening test body is suitable for winter or in manual construction operation environments.
(4) In the third embodiment, the finished product is detected, the setting time of the pasty finished product is observed, the initial setting time of the product is ensured to be more than or equal to 5 hours, the final setting time of the product is ensured to be more than or equal to 5 hours, the interval between the initial setting time and the final setting time is short, the 3D strength of the product is detected, the 3D strength comprises 3D compressive strength, 3D flexural strength and 3D tensile strength, and the maximum stress when a mortar hardening test body bears compressive failure is called the compressive strength of the mortar; the maximum stress when the mortar hardened specimen bears bending failure is called the breaking strength of the mortar; the maximum stress when the mortar hardening test body bears tensile failure is called the tensile strength of the mortar, the outer surface strength of the solidified product is detected to be greater than or equal to 2.5MPa, and the water retention rate is greater than or equal to 98 percent, so that the product is qualified, and is suitable for high-temperature environments in summer or mechanized construction.
(5) The high-water-retention natural gypsum putty-free mortar and the construction method thereof have the advantages that the same raw materials are used in different proportions, the product is pertinently suitable for construction environments with different climates, products with different proportions are used in different climatic environments, and the construction efficiency is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: the high-water-retention natural gypsum putty-free mortar comprises the following raw materials in parts by weight: 65 parts of natural anhydrite, 20 parts of natural dihydrate gypsum, 5 parts of white cement, 8 parts of vitrified micro bubbles, 0.3 part of thickening agent and 1.7 parts of natural anhydrite, wherein the natural anhydrite is 200-mesh natural anhydrite powder, the content of calcium sulfate is more than or equal to 90 percent, the whiteness is more than or equal to 85 degrees, the natural dihydrate gypsum is 325-mesh natural dihydrate gypsum powder, and the content of calcium sulfate is more than or equal to 95 percent; the whiteness is greater than or equal to 85 degrees, the white cement adopts 42.5# white portland cement for improving the early strength and the later whiteness of the slurry, and the water-retaining agent is formed by mixing hydroxypropyl methyl cellulose and lithium bentonite according to a certain proportion.
A construction method of natural gypsum putty-free mortar with high water retention comprises the following working steps:
the first step is as follows: grinding natural gypsum; anhydrite is a sulfate mineral, belongs to an orthorhombic (orthorhombic) crystal system, is columnar or thick plate-shaped, is massive or fibrous, is colorless, white, or is light grey, light blue or light red due to impurities, has glass luster, has three groups of mutually perpendicular cleavages, can be split into rectangular cleavage blocks, has the Mohs hardness of 3-3.5 and the specific gravity of 2.98, is mainly a chemical deposition product, is formed in a great amount in inland salt lakes, is usually associated with gypsum, halite, sylvite and the like, is easily hydrated when exposed on the ground surface to form gypsum, namely, natural dihydrate gypsum (CaSO 4.2H2O), monoclinic crystal system, is plate-shaped, is usually compact massive or fibrous, is white or grey, is red, brown, glass or sericite luster, the natural anhydrite and the natural dihydrate gypsum are respectively sent to a grinding machine to be ground through the grinding machine, a three-roller grinding machine is adopted, the natural anhydrite is added from a natural hopper consisting of a middle roller and a rear roller and two material retaining plates, the materials are rapidly turned and sheared through the opposite asynchronous rotation of the middle group and the rear group, the structural stress surface between the molecules of the raw materials is broken and crushed, and the high-fineness gypsum powder is obtained through the high-speed secondary grinding of the middle roller and the front roller.
The second step is that: mixing gypsum powder; weighing 65 parts of natural anhydrite powder and 20 parts of natural dihydrate gypsum powder, sending the materials into a mixer, premixing for 1 minute, pouring 5 parts of white cement, 1.7 parts of water-retaining agent, 0.3 part of thickening agent and 8 parts of vitrified micro bubbles into a mixer in sequence, and mixing the materials with the premixed materials uniformly in the mixer to obtain a finished product.
The third step: detecting a finished product; taking a proper amount of finished products, adding water into the finished products, wherein the ratio of the finished products to the water is 1: 0.1, stirring the paste, continuously stirring the paste to enable the finished product to be uniform paste, detecting the fluidity and the setting time of the finished product and detecting the formed 3D strength, firstly, stably fixing the detector at a specified position, filling a gasket between a base and an instrument frame, adjusting the height of the gasket to adjust the level of a table top, after the instrument is installed, the table top is leveled when measured along two diameter directions which are at right angles to each other, after a jump table is installed, detecting the fluidity standard sample, if the difference between the measured fluidity value and the given fluidity value of the standard sample is within a specified range, the installation and the service performance of the jump table are qualified, observing the setting time of the paste finished product, ensuring that the initial setting time of the product is more than or equal to 2h, the final setting time is more than or equal to 3h, the initial setting time interval and the final setting time are short, and then detecting the 3D strength of the product, wherein the 3D strength comprises 3D compressive strength, 3D breaking strength and 3D tensile strength, and the maximum stress of the mortar hardened specimen when the mortar hardened specimen bears compressive failure is called compressive strength of the mortar; the maximum stress when the mortar hardened specimen bears bending failure is called the breaking strength of the mortar; the maximum stress when the mortar hardening test body bears tensile failure is called the tensile strength of the mortar, the external surface strength after the solidification of the product is detected to be more than or equal to 2.0MPa, and the water retention rate is more than or equal to 92 percent, so that the product is qualified and is suitable for construction in spring and autumn.
The fourth step: packaging finished products, namely performing bulk packaging or bagging packaging according to the requirements of customers, and loading the finished products into a tank car in the bulk packaging process (through a discharger); the bagged finished products are stacked and placed in a warehouse by the stacker, the warehouse is provided with a plurality of automatic spraying devices, each device is provided with a plurality of spray heads, the water quantity and the strength can be automatically adjusted, the dust generated during the stacking is settled, the environment pollution caused by flying of the dust is avoided, the dust collected by the cloth bag dust removal system and the dust settled by spraying are subjected to centralized treatment, the centralized dust is put back into the mixer for recycling, and the waste is avoided.
Example two: the high-water-retention natural gypsum putty-free mortar comprises the following raw materials in parts by weight: 55 parts of natural anhydrite, 25 parts of natural dihydrate gypsum, 10 parts of white cement, 8 parts of vitrified micro bubbles, 0.3 part of thickening agent and 1.7 parts of water-retaining agent, wherein the natural anhydrite is 200-mesh natural anhydrite powder, the content of calcium sulfate is more than or equal to 90 percent, the whiteness is more than or equal to 85 degrees, the natural dihydrate gypsum is 325-mesh natural dihydrate gypsum powder, and the content of calcium sulfate is more than or equal to 95 percent; the whiteness is greater than or equal to 85 degrees, the white cement adopts 42.5# white portland cement for improving the early strength and the later whiteness of the slurry, and the water-retaining agent is formed by mixing hydroxypropyl methyl cellulose and lithium bentonite according to a certain proportion.
A construction method of natural gypsum putty-free mortar with high water retention comprises the following working steps:
the first step is as follows: grinding natural gypsum; anhydrite is a sulfate mineral, belongs to an orthorhombic (orthorhombic) crystal system, is columnar or thick plate-shaped, is massive or fibrous, is colorless, white, or is light grey, light blue or light red due to impurities, has glass luster, has three groups of mutually perpendicular cleavages, can be split into rectangular cleavage blocks, has the mohs hardness of 3-3.5 and the specific gravity of 2.98, is mainly a chemical deposition product, is formed in a great amount in inland salt lakes, is usually associated with gypsum, halite, sylvite and the like, is easily hydrated when exposed on the ground surface to form gypsum, namely, natural dihydrate gypsum (CaSO 4.2H2O), monoclinic crystal system, is plate-shaped, is usually compact massive or fibrous, white or grey, red, brown, glass or silk luster, natural anhydrite and natural dihydrate gypsum are respectively sent to a grinding machine to be ground through the grinding machine, a three-roller grinding machine is adopted, the natural anhydrite is added from a natural hopper consisting of a middle roller and a rear roller and two material retaining plates, the materials are rapidly turned and sheared through the opposite asynchronous rotation of the middle group and the rear group, the structural stress surface between the molecules of the raw materials is broken and crushed, and the high-fineness gypsum powder is obtained through the high-speed secondary grinding of the middle roller and the front roller.
The second step is that: mixing gypsum powder; weighing 55 parts of natural anhydrite powder and 25 parts of natural dihydrate gypsum powder, sending the materials into a mixer, premixing for 1 minute, pouring 10 parts of white cement, 1.7 parts of water-retaining agent, 0.3 part of thickening agent and 8 parts of vitrified micro bubbles into a mixer in sequence, and mixing the materials with the premixed materials uniformly in the mixer to obtain a finished product.
The third step: detecting a finished product; taking a proper amount of finished products, adding water into the finished products, wherein the ratio of the finished products to the water is 1: 0.1, stirring the paste, continuously stirring the paste to enable the finished product to be uniform paste, detecting the fluidity and the setting time of the finished product and detecting the formed 3D strength, firstly, stably fixing the detector at a specified position, filling a gasket between a base and an instrument frame, adjusting the height of the gasket to adjust the level of a table top, after the instrument is installed, the table top is leveled when measured along two diameter directions which are at right angles to each other, after a jump table is installed, detecting by using a fluidity standard sample, if the difference between the measured fluidity value and the given fluidity value of the standard sample is within a specified range, the installation and the service performance of the jump table are qualified, observing the setting time of the paste finished product, ensuring that the initial setting time of the product is more than or equal to 1.5h, the final setting time is more than or equal to 2h, the initial setting time interval and the final setting time are short, and then detecting the 3D strength of the product, wherein the 3D strength comprises 3D compressive strength, 3D breaking strength and 3D tensile strength, and the maximum stress of the mortar hardened specimen when the mortar hardened specimen bears compressive failure is called compressive strength of the mortar; the maximum stress when the mortar hardened specimen bears bending failure is called the breaking strength of the mortar; the maximum stress when the mortar hardening test body bears tensile failure is called the tensile strength of the mortar, the outer surface strength of the solidified product is detected to be greater than or equal to 3.0MPa, and the water retention rate is greater than or equal to 85 percent, so that the product is qualified, the product opening time is short, and the mortar hardening test body is suitable for winter or in manual construction operation environments.
The fourth step: packaging finished products, namely performing bulk packaging or bagging packaging according to the requirements of customers, and loading the finished products into a tank car in the bulk packaging process (through a discharger); the bagged finished products are stacked and placed in a warehouse by the stacker, the warehouse is provided with a plurality of automatic spraying devices, each device is provided with a plurality of spray heads, the water quantity and the strength can be automatically adjusted, the dust generated during the stacking is settled, the environment pollution caused by flying of the dust is avoided, the dust collected by the cloth bag dust removal system and the dust settled by spraying are subjected to centralized treatment, the centralized dust is put back into the mixer for recycling, and the waste is avoided.
Example three: the high-water-retention natural gypsum putty-free mortar comprises the following raw materials in parts by weight: 70 parts of natural anhydrite, 10 parts of natural dihydrate gypsum, 10 parts of white cement, 8 parts of vitrified micro bubbles, 0.3 part of thickening agent and 1.7 parts of water-retaining agent, wherein the natural anhydrite is 200-mesh natural anhydrite powder, the content of calcium sulfate is more than or equal to 90 percent, the whiteness is more than or equal to 85 degrees, the natural dihydrate gypsum is 325-mesh natural dihydrate gypsum powder, and the content of calcium sulfate is more than or equal to 95 percent; the whiteness is greater than or equal to 85 degrees, the white cement adopts 42.5# white portland cement for improving the early strength and the later whiteness of the slurry, and the water-retaining agent is formed by mixing hydroxypropyl methyl cellulose and lithium bentonite according to a certain proportion.
A construction method of natural gypsum putty-free mortar with high water retention comprises the following working steps:
the first step is as follows: grinding natural gypsum; anhydrite is a sulfate mineral, belongs to an orthorhombic (orthorhombic) crystal system, is columnar or thick plate-shaped, is massive or fibrous, is colorless, white, or is light grey, light blue or light red due to impurities, has glass luster, has three groups of mutually perpendicular cleavages, can be split into rectangular cleavage blocks, has the mohs hardness of 3-3.5 and the specific gravity of 2.98, is mainly a chemical deposition product, is formed in a great amount in inland salt lakes, is usually associated with gypsum, halite, sylvite and the like, is easily hydrated when exposed on the ground surface to form gypsum, namely, natural dihydrate gypsum (CaSO 4.2H2O), monoclinic crystal system, is plate-shaped, is usually compact massive or fibrous, white or grey, red, brown, glass or silk luster, natural anhydrite and natural dihydrate gypsum are respectively sent to a grinding machine to be ground through the grinding machine, a three-roller grinding machine is adopted, the natural anhydrite is added from a natural hopper consisting of a middle roller and a rear roller and two material retaining plates, the materials are rapidly turned and sheared through the opposite asynchronous rotation of the middle group and the rear group, the structural stress surface between the molecules of the raw materials is broken and crushed, and the high-fineness gypsum powder is obtained through the high-speed secondary grinding of the middle roller and the front roller.
The second step is that: mixing gypsum powder; weighing 70 parts of natural anhydrite powder and 10 parts of natural dihydrate gypsum powder, sending the materials into a mixer, premixing for 1 minute, pouring 10 parts of white cement, 1.7 parts of water-retaining agent, 0.3 part of thickening agent and 8 parts of vitrified micro bubbles into a mixer in sequence, and mixing the materials with the premixed materials uniformly in the mixer to obtain a finished product.
The third step: detecting a finished product; taking a proper amount of finished products, adding water into the finished products, wherein the ratio of the finished products to the water is 1: 0.1, stirring the paste, continuously stirring the paste to enable the finished product to be uniform paste, detecting the fluidity and the setting time of the finished product and detecting the formed 3D strength, firstly, stably fixing the detector at a specified position, filling a gasket between a base and an instrument frame, adjusting the height of the gasket to adjust the level of a table top, after the instrument is installed, the table top is leveled when measured along two diameter directions which are at right angles to each other, after a jump table is installed, detecting the fluidity standard sample, if the difference between the measured fluidity value and the given fluidity value of the standard sample is within a specified range, the installation and the service performance of the jump table are qualified, observing the setting time of the paste finished product, ensuring that the initial setting time of the product is more than or equal to 5 hours, the final setting time is more than or equal to 5 hours, the initial setting time and the final setting time interval are short, and then detecting the 3D strength of the product, wherein the 3D strength comprises 3D compressive strength, 3D breaking strength and 3D tensile strength, and the maximum stress of the mortar hardened specimen when the mortar hardened specimen bears compressive failure is called compressive strength of the mortar; the maximum stress when the mortar hardened specimen bears bending failure is called the breaking strength of the mortar; the maximum stress when the mortar hardening test body bears tensile failure is called the tensile strength of the mortar, the outer surface strength of the solidified product is detected to be greater than or equal to 2.5MPa, and the water retention rate is greater than or equal to 98 percent, so that the product is qualified, and is suitable for high-temperature environments in summer or mechanized construction.
The fourth step: packaging finished products, namely performing bulk packaging or bagging packaging according to the requirements of customers, and loading the finished products into a tank car in the bulk packaging process (through a discharger); the bagged finished products are stacked and placed in a warehouse by the stacker, the warehouse is provided with a plurality of automatic spraying devices, each device is provided with a plurality of spray heads, the water quantity and the strength can be automatically adjusted, the dust generated during the stacking is settled, the environment pollution caused by flying of the dust is avoided, the dust collected by the cloth bag dust removal system and the dust settled by spraying are subjected to centralized treatment, the centralized dust is put back into the mixer for recycling, and the waste is avoided.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The high-water-retention natural gypsum putty-free mortar is characterized in that: the method comprises the following raw materials: the natural anhydrite is 200-mesh natural anhydrite powder, the content of calcium sulfate is greater than or equal to 90 percent, the whiteness is greater than or equal to 85 degrees, the natural dihydrate gypsum is 325-mesh natural dihydrate gypsum powder, and the content of calcium sulfate is greater than or equal to 95 percent; the whiteness is greater than or equal to 85 degrees, the white cement adopts 42.5# white portland cement for improving the early strength and the later whiteness of the slurry, and the water-retaining agent is formed by mixing hydroxypropyl methyl cellulose and lithium bentonite according to a certain proportion.
2. A construction method of high water retention natural gypsum putty-free mortar is characterized by comprising the following steps: the method comprises the following working steps:
the first step is as follows: grinding natural gypsum;
the second step is that: mixing gypsum powder;
the third step: detecting a finished product;
the fourth step: and (6) packaging a finished product.
3. The construction method of the high water retention natural gypsum putty-free mortar according to claim 2, characterized in that: the first step, the natural anhydrite and the natural dihydrate gypsum are respectively sent to a grinding machine, the grinding machine is used for grinding, a three-roller grinding machine is adopted, the natural anhydrite is added by a natural hopper consisting of a middle roller and a rear roller and two material retaining plates, the materials are rapidly turned and sheared through the opposite asynchronous rotation of the middle group and the rear group, the structural stress surface between the molecules of the raw materials is broken and crushed, and the gypsum powder with high fineness is obtained through the high-speed secondary grinding of the middle roller and the front roller.
4. The construction method of the high water retention natural gypsum putty-free mortar according to claim 2, characterized in that: and step two, weighing natural anhydrite powder and natural dihydrate gypsum powder, sending the weighed natural anhydrite powder and natural dihydrate gypsum powder into a mixer, premixing for 1 minute, sequentially pouring white cement, a water-retaining agent, a thickening agent and vitrified micro bubbles into a mixer, and uniformly mixing the white cement, the water-retaining agent, the thickening agent and the vitrified micro bubbles with premixed materials in the mixer to obtain a finished product.
5. The construction method of the high water retention natural gypsum putty-free mortar according to claim 2, characterized in that: and step three, taking a proper amount of finished products, and adding water into the finished products, wherein the ratio of the finished products to the water is 1: 0.1, stir it, continuously stir, make the finished product be even pasty, detect the mobility and the setting time of finished product and the 3D intensity after the shaping detects, 3D intensity includes 3D compressive strength, 3D rupture strength and 3D tensile strength.
6. The construction method of the high water retention natural gypsum putty-free mortar according to claim 2, characterized in that: and fourthly, performing bulk packaging or bagging packaging according to the requirements of customers, loading the finished products into a tank car in the bulk packaging process (through a discharger), and using a packaging machine for bagging packaging.
7. The construction method of the high water retention natural gypsum putty-free mortar according to claim 6, characterized in that: and fourthly, arranging a cloth bag dust removal system at a feed inlet of the discharger for collecting dust generated in the bulk process, arranging the cloth bag dust removal system at a feed inlet of the packaging machine for collecting dust generated in the bagging and packaging process, packaging and conveying the packaged finished products to a stacker when the finished products are bagged and packaged, and stacking the bagged and packaged finished products by the stacker and placing the stacked packaged finished products in a warehouse.
8. The construction method of the high water retention natural gypsum putty-free mortar according to claim 7, characterized in that: and fourthly, installing a plurality of sets of automatic spraying devices in the warehouse, wherein each device is provided with a plurality of spray heads, the water quantity and the strength can be automatically adjusted, dust generated during sedimentation and stacking is prevented from flying to cause environmental pollution, dust collected by the cloth bag dust removal system and dust generated after sedimentation through spraying are subjected to centralized treatment, and the centralized dust is put back into the mixer for recycling.
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