CN111320449A - Lightweight plastering gypsum using diatomite waste particles as aggregate and preparation method thereof - Google Patents
Lightweight plastering gypsum using diatomite waste particles as aggregate and preparation method thereof Download PDFInfo
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- CN111320449A CN111320449A CN202010236333.XA CN202010236333A CN111320449A CN 111320449 A CN111320449 A CN 111320449A CN 202010236333 A CN202010236333 A CN 202010236333A CN 111320449 A CN111320449 A CN 111320449A
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- diatomite
- waste particles
- diatomite waste
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- gypsum
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims abstract description 117
- 239000002699 waste material Substances 0.000 title claims abstract description 93
- 239000002245 particle Substances 0.000 title claims abstract description 71
- 239000010440 gypsum Substances 0.000 title claims abstract description 59
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 59
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 27
- 239000010703 silicon Substances 0.000 claims abstract description 27
- 239000007788 liquid Substances 0.000 claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims description 13
- 230000003449 preventive effect Effects 0.000 claims description 13
- 239000013008 thixotropic agent Substances 0.000 claims description 13
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 9
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 9
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 9
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group 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 9
- 238000001035 drying Methods 0.000 claims description 8
- 229920003086 cellulose ether Polymers 0.000 claims description 7
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000003756 stirring Methods 0.000 claims description 4
- 239000011398 Portland cement Substances 0.000 claims description 3
- 239000003619 algicide Substances 0.000 claims description 3
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 230000000855 fungicidal effect Effects 0.000 claims description 3
- 239000000417 fungicide Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 102000004169 proteins and genes Human genes 0.000 claims description 3
- 108090000623 proteins and genes Proteins 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 241000195493 Cryptophyta Species 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000002689 soil Substances 0.000 claims description 2
- 238000012545 processing Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 9
- 239000010451 perlite Substances 0.000 abstract description 8
- 235000019362 perlite Nutrition 0.000 abstract description 8
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 5
- 239000004576 sand Substances 0.000 abstract description 5
- 239000011248 coating agent Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000005661 hydrophobic surface Effects 0.000 abstract description 3
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 abstract description 3
- 231100000331 toxic Toxicity 0.000 abstract description 3
- 230000002588 toxic effect Effects 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract description 2
- 239000011325 microbead Substances 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011505 plaster Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 229910021486 amorphous silicon dioxide Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000012611 container material Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- C04B2111/00017—Aspects relating to the protection of the environment
-
- 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
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
-
- 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
- C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
- C04B2111/00482—Coating or impregnation materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/40—Porous or lightweight materials
-
- 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
- C04B2201/10—Mortars, concrete or artificial stone characterised by specific physical values for the viscosity
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/20—Mortars, concrete or artificial stone characterised by specific physical values for the density
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A lightweight plastering gypsum using diatomite waste particles as aggregate and a preparation method thereof belong to the technical field of building materials. The diatomite waste particles used in the invention have simple processing process and low processing cost. When the diatomite waste is treated, the use amount of sand, vitrified micro-beads and perlite is reduced. Solid waste is utilized, green and energy-saving effects are achieved, and meanwhile material cost is reduced. The diatomite waste particles used in the invention have light weight, porous microporous structure, air permeability, strong adsorbability and uniform granularity, are fully treated by the organic silicon treatment liquid, and have hydrophobic surface. The aggregate is added into the lightweight plastering gypsum as an aggregate, is applied to plastering of interior walls, reduces the bearing of buildings, adsorbs toxic and harmful gases such as formaldehyde, VOC and the like, purifies air, adjusts the indoor temperature and humidity, has air permeability, water tightness, mildew resistance and bacteriostasis, has high adhesion with the wall body, excellent leveling effect, greenness, energy conservation, health, environmental protection, high cost performance, low volume density and high coating rate.
Description
Technical Field
The invention belongs to the technical field of building materials, and particularly relates to light plastering gypsum using algae soil waste particles as aggregate and a preparation method thereof.
Background
Along with the exploitation of grit resource, lead to natural mineral resources to reduce gradually, along with environmental protection management and control strengthens, the exploitation requirement is higher and higher, and the cost is big, and causes the environmental destruction. The traditional plastering material mainly uses sand as aggregate, and the sand consumption is higher. Therefore, the use of perlite, vitrified beads, and other particles as aggregate instead of sand has been a trend in the recent years for interior wall plastering materials.
The production raw materials of common perlite and vitrified micro bubbles in the market are mainly non-renewable natural mineral perlite and pitchstone, the difficulty in the mining process is high, the utilization rate of the mined materials is low, the process requirement in the processing process is high, the energy consumption is high, the expanded perlite is mainly supplied by burning the non-renewable natural gas, and the closed-cell perlite and the vitrified micro bubbles are mainly converted into heat energy by electric energy. Most regional power is still provided by non-renewable resources. The process emissions pollute the air, which primarily emits carbon dioxide, a greenhouse gas that contributes to global warming. The processing conditions are severe, the production conditions of various production enterprises are mixed, the product is difficult to control, and the closed porosity of perlite and vitrified micro bubbles which are generally used for plastering materials of interior walls is not more than 30 percent. The relatively high aperture ratio is used as aggregate, the water absorption is strong, the aggregate is very easy to break and pulverize in the stirring process, and the product stability is directly influenced when the aggregate is added into a plastering material, so that the product performance is reduced, the pulverization condition of the wall surface after construction is obvious, and other quality problems are solved.
The diatomite existing in nature is amorphous silicon dioxide, remains of lower aquatic plant diatom, is white, loose, blocky or powdery, has a porous microporous structure, is light in weight and strong in adsorbability, and is mainly used as a healthy and environment-friendly interior wall decorative coating in recent years. The material can adsorb toxic and harmful substances such as formaldehyde, voc and the like, and simultaneously regulate indoor temperature and humidity, and is a natural, green and healthy environment-friendly material. However, the quality of diatomite is more strictly controlled because of the high requirements of indexes such as decoration, environmental protection, functionality and the like of the interior wall decorative coating. Generally, after surveying, the produced diatomite is divided into first-level diatomite, second-level diatomite and third-level diatomite according to different diatomite contents. The diatomite is subjected to processing technologies such as drying, screening, fluxing roasting and the like to obtain a product which meets GB14936-2012 diatomite. The processing technology has high requirement, large energy consumption and high processing cost. Although the secondary diatomite and the tertiary diatomite have higher diatomite content, the finished diatomite is less in amount and higher in processing cost, so that only the primary diatomite is generally used as a raw material for preparing the diatomite for production, and meanwhile, the exploited secondary diatomite and the tertiary diatomite become wastes and lose the utilization value. With the increasing output of interior wall decorative coatings prepared by taking diatomite as a main additive and having environmental protection, secondary diatomite and tertiary diatomite wastes are increasing day by day.
Therefore, the utilization of the secondary diatomite and the tertiary diatomite waste and the retention and the endowment of the characteristics of the new products to the diatomite become a new subject.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the light plastering gypsum using the diatomite waste particles as the aggregate and the preparation method thereof are provided for solving the technical problem of resource waste caused by the fact that secondary diatomite waste and tertiary diatomite waste are not utilized in the prior art.
The lightweight plastering gypsum with the diatomite waste particles as the aggregate comprises the following components in parts by weight: 500 to 750 portions of gypsum, 20 to 50 portions of cement, 100 to 250 portions of diatomite waste particles, 0.5 to 1.2 portions of gypsum retarder, 0.1 to 0.5 portion of cellulose ether, 0.5 to 1.0 portion of thixotropic agent and 0.1 to 0.5 portion of mildew preventive.
The gypsum is building gypsum of grade 2.0 or above 2.0.
The cement is 32.5-grade or above 32.5-grade portland cement.
The cellulose ether is hydroxypropyl methyl cellulose ether with the viscosity of 1.5-3 ten thousand MPa.s.
The thixotropic agent is one or a mixture of bentonite and modified bentonite.
The gypsum retarder is a protein alkaline composite retarder.
The mildew preventive is a broad-spectrum fungicide and an algicide in powder form.
The diatomite waste particles are prepared by soaking and drying the diatomite waste particles in the organic silicon treatment solution.
The preparation method of the lightweight plastering gypsum with the diatomite waste particles as the aggregate comprises the following steps which are sequentially carried out,
step one, taking diatomite waste with the diatom content lower than 70%, putting the diatomite waste into a container, and injecting organic silicon treatment liquid into the container until the organic silicon treatment liquid completely immerses the diatomite waste;
step two, stirring the diatomite waste soaked in the step one by using a water-resistant and alkali-resistant instrument intermittently to ensure that the diatomite waste is more fully contacted with the organic silicon treatment solution, wherein the soaking time is 1-3 h;
step three, filtering the diatomite waste soaked in the step two by using a filter screen with the pore diameter of 75 micrometers to obtain soaked diatomite waste particles with the particles larger than 75 micrometers;
step four, drying the diatomite waste particles obtained in the step three at 120-150 ℃ until the water content is less than or equal to 5%;
screening the diatomite waste particles dried in the fourth step by using a square-hole sieve with the hole diameter of more than or equal to 0.2mm to obtain the diatomite waste particles with the surface treated by the organic silicon treatment liquid with the particle diameter of 0.075 mm-0.2 mm;
and step six, mixing the following components in parts by weight, wherein 500-750 parts of gypsum, 20-50 parts of cement, 100-250 parts of diatomite waste particles obtained in the step five, 0.5-1.2 parts of gypsum retarder, 0.1-0.5 part of cellulose ether, 0.5-1.0 part of thixotropic agent and 0.1-0.5 part of mildew preventive, and obtaining the light plastering gypsum with the diatomite waste particles as aggregate.
The organic silicon treatment liquid is 100 times watt-gram BS-16 organic silicon resin diluted by tap water.
Through the design scheme, the invention can bring the following beneficial effects:
the diatomite waste particles used in the invention have simple processing process and low processing cost. When the diatomite waste is treated, the use amount of sand, vitrified micro-beads and perlite is reduced. Solid waste is utilized, green and energy-saving effects are achieved, and meanwhile material cost is reduced.
The diatomite waste particles used in the invention have light weight, porous microporous structure, air permeability, strong adsorbability and uniform granularity, are fully treated by the organic silicon treatment liquid, and have hydrophobic surface. The aggregate is added into the lightweight plastering gypsum as an aggregate, is applied to plastering of interior walls, reduces the bearing of buildings, adsorbs toxic and harmful gases such as formaldehyde, VOC and the like, purifies air, adjusts the indoor temperature and humidity, has air permeability, water tightness, mildew resistance and bacteriostasis, has high adhesion with the wall body, excellent leveling effect, greenness, energy conservation, health, environmental protection, high cost performance, low volume density and high coating rate. The labor intensity is reduced in the construction process, the construction method can be popularized and used in a large area, and the construction method is a high-quality choice for building healthy houses.
Detailed Description
The lightweight plastering gypsum with the diatomite waste particles as the aggregate consists of gypsum, cement, the diatomite waste particles, hydroxypropyl methyl cellulose ether, a thixotropic agent, a gypsum retarder and a mildew preventive. Wherein, the plaster comprises 500 to 750 portions of plaster, 20 to 50 portions of cement, 100 to 250 portions of diatomite waste particles, 0.5 to 1.2 portions of plaster retarder, 0.1 to 0.5 portion of hydroxypropyl methyl cellulose ether, 0.5 to 1.0 portion of thixotropic agent and 0.1 to 0.5 portion of mildew preventive.
The gypsum is building gypsum of grade 2.0 or above 2.0.
The cement is 32.5-grade or above 32.5-grade portland cement.
The cellulose ether is hydroxypropyl methyl cellulose ether with the viscosity of 1.5-3 ten thousand MPa.s.
The thixotropic agent is bentonite or modified bentonite.
The gypsum retarder is a protein alkaline composite retarder.
The mildew preventive is a broad-spectrum fungicide, an algicide, based on a powder form.
The diatomite waste particles are derived from diatomite waste, and are soaked in an organic silicon treatment solution and dried to prepare the diatomite waste particles with hydrophobic surfaces.
The preparation method of the lightweight plastering gypsum with the diatomite waste particles as the aggregate is used for preparing the lightweight plastering gypsum with the diatomite waste particles as the aggregate and comprises the steps of preparing the diatomite waste particles and mixing the prepared diatomite waste particles with other raw materials to obtain the lightweight plastering gypsum with the diatomite waste particles as the aggregate.
The specific method for preparing the diatomite waste particles comprises the following steps:
1. the diatomite waste is simultaneously mined, and the cost performance of the prepared product which meets the standard GB14936-2012 diatomite is relatively low due to the fact that the content of the diatomite is lower than 70%, and the waste is abandoned.
2. Soaking the diatomite waste in an organic silicon treatment solution. According to the amount of the diatomite to be soaked, a container with a proper size is selected. The selected container material is water-resistant and alkali-resistant. The volume of the container is 3 times or more than that of the diatomite waste. Firstly, diatomite waste, which is generally powdery and partially absorbs water to form soft blocks, is added into a container, the container is flatly paved at the bottom of the container, and the organic silicon treatment liquid is slowly injected, a water-resistant and alkali-resistant appliance can be used for stirring in the process, the liquid level of the organic silicon treatment liquid is ensured to cover the surface of the diatomite waste until the diatomite waste is fully contacted with the organic silicon treatment liquid, and the powdery and block diatomite waste forms dispersed suspension in the organic silicon treatment liquid for 1-3 hours.
3. And (3) filtering the diatomite waste soaked by the organic silicon treatment solution in the container by using a filter screen with the pore diameter of 75 micrometers to obtain diatomite waste particles with the particles larger than 75 micrometers, wherein the filtered treatment solution can be reused.
4. Drying the diatomite waste particles soaked and treated by the organic silicon treatment solution with the filtered particles larger than 75 micrometers until the water content is less than or equal to 5 percent, wherein the drying temperature is 120-150 ℃, and the dried diatomite waste particles are naturally powdery.
5. And (3) screening the diatomite waste particles with the water content of less than or equal to 5% after drying by using a square-hole sieve with the hole diameter of more than or equal to 0.2mm to obtain the diatomite waste particles with the surface treated by the organic silicon treatment liquid with the particle diameter of 0.075 mm-0.2 mm.
6. The organic silicon treatment liquid is 100 times watt-gram BS-16 organic silicon resin diluted by tap water.
Example 1
The lightweight plastering gypsum with the diatomite waste particles as the aggregate is prepared from the following raw materials in parts by weight: 500 parts of gypsum, 50 parts of cement, 250 parts of diatomite waste particles, 0.5 part of gypsum retarder, 0.5 part of hydroxypropyl methyl cellulose ether, 0.5 part of thixotropic agent and 0.5 part of mildew preventive.
Example 2
The lightweight plastering gypsum with the diatomite waste particles as the aggregate is prepared from the following raw materials in parts by weight: 580 parts of gypsum, 40 parts of cement, 200 parts of diatomite waste particles, 0.75 part of gypsum retarder, 0.37 part of hydroxypropyl methyl cellulose ether, 0.65 part of thixotropic agent and 0.37 part of mildew preventive.
Example 3
The lightweight plastering gypsum with the diatomite waste particles as the aggregate is prepared from the following raw materials in parts by weight: 660 parts of gypsum, 30 parts of cement, 150 parts of diatomite waste particles, 1 part of gypsum retarder, 0.23 part of hydroxypropyl methyl cellulose ether, 0.8 part of thixotropic agent and 0.24 part of mildew preventive.
Example 4
The lightweight plastering gypsum with the diatomite waste particles as the aggregate is prepared from the following raw materials in parts by weight: 750 parts of gypsum, 20 parts of cement, 100 parts of diatomite waste particles, 1.2 parts of a gypsum retarder, 0.1 part of hydroxypropyl methyl cellulose ether, 1 part of a thixotropic agent and 0.1 part of a mildew preventive.
The following table shows the performance test results of the lightweight plastering plasters obtained in examples 1 to 4:
the performance test results of the light plastering gypsum obtained in the above examples 1 to 4 can meet the specified requirements of the light bottom plastering gypsum in GB/T28627-2012 plastering gypsum.
Claims (10)
1. The light plastering gypsum with the diatomite waste particles as the aggregate is characterized in that: comprises the following components in parts by weight: 500 to 750 portions of gypsum, 20 to 50 portions of cement, 100 to 250 portions of diatomite waste particles, 0.5 to 1.2 portions of gypsum retarder, 0.1 to 0.5 portion of cellulose ether, 0.5 to 1.0 portion of thixotropic agent and 0.1 to 0.5 portion of mildew preventive.
2. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the gypsum is building gypsum of grade 2.0 or above 2.0.
3. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the cement is 32.5-grade or above 32.5-grade portland cement.
4. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the cellulose ether is hydroxypropyl methyl cellulose ether with the viscosity of 1.5-3 ten thousand MPa.s.
5. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the thixotropic agent is one or a mixture of bentonite and modified bentonite.
6. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the gypsum retarder is a protein alkaline composite retarder.
7. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the mildew preventive is a broad-spectrum fungicide and an algicide in powder form.
8. The lightweight plastering gypsum with aggregate of diatomite waste particles as claimed in claim 1, wherein: the diatomite waste particles are prepared by soaking and drying the diatomite waste particles in the organic silicon treatment solution.
9. The preparation method of the lightweight plastering gypsum with the diatomite waste particles as the aggregate is characterized by comprising the following steps: comprises the following steps which are sequentially carried out,
step one, taking diatomite waste with the diatom content lower than 70%, putting the diatomite waste into a container, and injecting organic silicon treatment liquid into the container until the organic silicon treatment liquid completely immerses the diatomite waste;
step two, stirring the diatomite waste soaked in the step one by using a water-resistant and alkali-resistant instrument intermittently to ensure that the diatomite waste is more fully contacted with the organic silicon treatment solution, wherein the soaking time is 1-3 h;
step three, filtering the diatomite waste soaked in the step two by using a filter screen with the pore diameter of 75 micrometers to obtain soaked diatomite waste particles with the particles larger than 75 micrometers;
step four, drying the diatomite waste particles obtained in the step three at 120-150 ℃ until the water content is less than or equal to 5%;
screening the diatomite waste particles dried in the fourth step by using a square-hole sieve with the hole diameter of more than or equal to 0.2mm to obtain the diatomite waste particles with the surface treated by the organic silicon treatment liquid with the particle diameter of 0.075 mm-0.2 mm;
and step six, mixing the following components in parts by weight, wherein 500-750 parts of gypsum, 20-50 parts of cement, 100-250 parts of diatomite waste particles obtained in the step five, 0.5-1.2 parts of gypsum retarder, 0.1-0.5 part of cellulose ether, 0.5-1.0 part of thixotropic agent and 0.1-0.5 part of mildew preventive, and obtaining the light plastering gypsum with the diatomite waste particles as aggregate.
10. The method for preparing lightweight plastering gypsum with aggregate of the waste particles of the algae soil as claimed in claim 9, which is characterized in that: the organic silicon treatment liquid is 100 times watt-gram BS-16 organic silicon resin diluted by tap water.
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