CN105130356A - Formula and production method for lightweight phosphogypsum board - Google Patents
Formula and production method for lightweight phosphogypsum board Download PDFInfo
- Publication number
- CN105130356A CN105130356A CN201510449513.5A CN201510449513A CN105130356A CN 105130356 A CN105130356 A CN 105130356A CN 201510449513 A CN201510449513 A CN 201510449513A CN 105130356 A CN105130356 A CN 105130356A
- Authority
- CN
- China
- Prior art keywords
- phosphogypsum
- lightweight
- plaster tablet
- agent
- phosphorus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Medicinal Preparation (AREA)
Abstract
The invention provides a formula and production method for a lightweight phosphogypsum board. According to the invention, the quality of the lightweight phosphogypsum board and an ultra-lightweight phosphogypsum board is allowed to accord with national standards (GB/T9775-2008) and meet demands of clients through proportioning of phosphogypsum raw materials, slurrying according to a lightweight phosphogypsum formula, slurrying according to an ultra-lightweight phosphogypsum formula, drying of the lightweight phosphogypsum board and board making and drying of ultra-lightweight phosphogypsum. According to the invention, industrialization production is realized; and the prepared boards have good thermal insulation performance and temperature adjustment performance, are easy to construct and have good market prospects.
Description
Technical field
The invention belongs to light-weight building decorative material technology, relate to lightweight phosphogypsum production method, especially comprise lightweight, the formula of Ultralight phosphorus plaster tablet and producing and manufacturing technique thereof.
Background technology
China is first production of phosphate fertilizer state in the world, is also the maximum country of by-product phosphogypsum amount simultaneously.Preparation 1t phosphoric acid probably produces phosphogypsum at about 5t.China discharges phosphogypsum about 5,000 ten thousand t every year, and just increases with the speed of annual 15%.Current China phosphogypsum utilization ratio only has about 20%, is mainly applied to cement and building materials (producing common phosphorus plaster tablet etc.).Utilizing phosphogypsum to produce common phosphorus plaster tablet is method comparatively ripe in current domestic phosphogypsum application.General employing mixes phosphogypsum raw material (comprising phosphogypsum, desulfurated plaster and the plaster of paris) and produces common phosphorus plaster tablet.Proportioning raw materials (weight percentage) accounts for 10-70% for phosphogypsum, and desulfurated plaster accounts for 30-70%, and the plaster of paris accounts for 0-20%.The common phosphorus plaster tablet (weight in average of 9.5mm specification plasterboard is >5.5kg/ ㎡) that Mount Taishan Gypsum Company produces occupies the plasterboard market of >50%, achieves the doulbe-sides' victory of environment and'economy benefit.Due in mixed phosphogypsum containing silicate, phosphoric acid salt, fluorochemical, organism and soluble salt, make its purity and soluble salt content and time of coagulation and wet tenacity be difficult to meet the requirement for raw material of lightweight and Ultralight phosphorus plaster tablet.Production rate slows down, and lightweight and Ultralight phosphorus plaster tablet quality product do not reach GB (GB/T9775-2008) and meet customer need.In general, the difficulty of mixed phosphogypsum material purity more low chlorine ion content higher production lightweight and Ultralight phosphorus plaster tablet is larger.The corner nail-holding ability people of the lightweight produced with mixed phosphogypsum and Ultralight phosphorus plaster tablet and the defects such as flexible type of making moist.Therefore, must improve to the production technique of phosphorus plaster tablet and formula the requirement being adapted to production lightweight and Ultralight phosphorus plaster tablet.
Summary of the invention
Object of the present invention provides a kind of have good heat insulating ability and thermoregulation to overcome the defect of above-mentioned prior art existence just, is easy to lightweight phosphorus plaster tablet formula and the production method thereof of construction.
The object of the invention is to realize by following technical solution.
A kind of lightweight phosphorus plaster tablet formula and production method thereof, the present invention is characterised in that:
Phosphogypsum proportioning raw materials:
Gypsum raw material comprises phosphogypsum, desulfurated plaster and the plaster of paris; The weight percent of raw material is: phosphogypsum accounts for 10-100%, and desulfurated plaster accounts for 0-90%, and the plaster of paris accounts for 0-30%; Mixed phosphogypsum material purity is greater than 70% usually, and chloride ion content is greater than 150ppm usually; Free-water and crystal water are sloughed in mixed phosphogypsum raw material drying and calcining rear (step or two step method), then make ripe phosphogypsum powder through ageing; And as raw material production lightweight and Ultralight phosphorus plaster tablet;
The slurrying of phosphogypsum formula:
The slurrying of lightweight phosphogypsum formula comprises: ripe phosphogypsum powder, ultra-fine gypsum seed (accelerator), water, glue crosslinking agent (pregelatinized corn flours), protect brilliant agent (cerelose), steady brilliant agent (Trisodium trimetaphosphate), dispersion agent (methyl how sodium sulfonate), pore forming material (sodium alkyl benzene sulfonate), retardant (citric acid etc.);
Phosphorus plaster tablet solidification cutting plate is dry:
Lightweight phosphogypsum slurry is adhesion-molded with upper and lower mask paper on gypsum board production line; Lightweight phosphorus plaster tablet is finally made through the drying of solidification cutting plate.
Lightweight phosphorus plaster tablet and production method thereof, it is characterized in that: lightweight phosphorus plaster tablet component proportion by the weight percent of raw material is: ripe phosphogypsum powder (95-98%), ultra-fine gypsum seed accelerator (<1%), pregelatinized corn flours glue crosslinking agent (0.5-1.0%), cerelose protects brilliant agent (<0.5%), the steady brilliant agent (0.05%) of Trisodium trimetaphosphate, methyl how sodium sulfonate dispersion agent (0.5-1.0%), sodium alkyl benzene sulfonate pore forming material (<0.04%), citric acid retardant (0.05%), pulping water terra alba is than being 0.6-0.9, wherein ultra-fine gypsum seed accelerator is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into.
Ultralight phosphorus plaster tablet and production method thereof, it is characterized in that: Ultralight phosphorus plaster tablet component proportion is: ripe phosphogypsum powder (95-98%), ultra-fine gypsum seed accelerator (<1.5%), pregelatinized corn flours glue crosslinking agent (1.0-2.0%), cerelose protects brilliant agent (<0.8%), the steady brilliant agent (0.1%) of Trisodium trimetaphosphate, methyl how sodium sulfonate dispersion agent (0.5-1.0%), sodium alkyl benzene sulfonate pore forming material (<0.05%), citric acid retardant (<0.05%), , slurrying gouache ratio is 0.65-0.95, wherein ultra-fine gypsum seed accelerator is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into.
Lightweight phosphorus plaster tablet component proportion of the present invention by the weight percent of raw material is: ripe phosphogypsum powder (95-98%), ultra-fine gypsum seed accelerator (<1%), pregelatinized corn flours glue crosslinking agent (0.5-1.0%), cerelose protects brilliant agent (<0.5%), the steady brilliant agent (0.05%) of Trisodium trimetaphosphate, methyl how sodium sulfonate dispersion agent (0.5-1.0%), sodium alkyl benzene sulfonate pore forming material (<0.04%), citric acid retardant (0.05%), pulping water terra alba is than being 0.6-0.9, wherein ultra-fine gypsum seed accelerator is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into.
Ultralight phosphorus plaster tablet component proportion of the present invention by the weight percent of raw material is: ripe phosphogypsum powder (95-98%), ultra-fine gypsum seed accelerator (<1.5%), pregelatinized corn flours glue crosslinking agent (1.0-2.0%), cerelose protects brilliant agent (<0.8%), the steady brilliant agent (0.1%) of Trisodium trimetaphosphate, methyl how sodium sulfonate dispersion agent (0.5-1.0%), sodium alkyl benzene sulfonate pore forming material (<0.05%), citric acid retardant (<0.05%), , slurrying gouache ratio is 0.65-0.95, wherein ultra-fine gypsum seed accelerator is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into.
Lightweight phosphorus plaster tablet weight ratio of the present invention is the weight in average of 9.5mm specification plasterboard is 4.85-5.5kg/ ㎡.
Ultralight phosphorus plaster tablet weight ratio of the present invention is the weight in average of 9.5mm specification plasterboard is <4.85kg/ ㎡.
The invention has the beneficial effects as follows, lightweight phosphorus plaster tablet and Ultralight phosphorus plaster tablet have good heat insulating ability and thermoregulation, are easy to construction, have good market outlook.
Embodiment
A kind of lightweight phosphorus plaster tablet formula and production method thereof, the present invention is characterised in that:
Phosphogypsum proportioning raw materials:
Gypsum raw material comprises phosphogypsum, desulfurated plaster and the plaster of paris; The weight percent of raw material is: phosphogypsum accounts for 10-100%, and desulfurated plaster accounts for 0-90%, and the plaster of paris accounts for 0-30%; Mixed phosphogypsum material purity is greater than 70% usually, and chloride ion content is greater than 150ppm usually; Free-water and crystal water are sloughed in mixed phosphogypsum raw material drying and calcining rear (step or two step method), then make ripe phosphogypsum powder through ageing; And as raw material production lightweight and Ultralight phosphorus plaster tablet;
The slurrying of phosphogypsum formula:
The slurrying of lightweight phosphogypsum formula comprises: ripe phosphogypsum powder, ultra-fine gypsum seed (accelerator), water, glue crosslinking agent (pregelatinized corn flours), protect brilliant agent (cerelose), steady brilliant agent (Trisodium trimetaphosphate), dispersion agent (methyl how sodium sulfonate), pore forming material (sodium alkyl benzene sulfonate), retardant (citric acid etc.);
Phosphorus plaster tablet solidification cutting plate is dry:
Lightweight phosphogypsum slurry is adhesion-molded with upper and lower mask paper on gypsum board production line; Lightweight phosphorus plaster tablet is finally made through the drying of solidification cutting plate;
Lightweight phosphorus plaster tablet component proportion of the present invention by the weight percent of raw material is: ripe phosphogypsum powder (95-98%), ultra-fine gypsum seed accelerator (<1.5%), pregelatinized corn flours glue crosslinking agent (1.0-2.0%), cerelose protects brilliant agent (<0.8%), the steady brilliant agent (0.1%) of Trisodium trimetaphosphate, methyl how sodium sulfonate dispersion agent (0.5-1.0%), sodium alkyl benzene sulfonate pore forming material (<0.05%), citric acid retardant (<0.05%), , slurrying gouache ratio is 0.65-0.95, wherein ultra-fine gypsum seed accelerator is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into.
Ultralight phosphorus plaster tablet component proportion of the present invention by the weight percent of raw material is: ripe phosphogypsum powder (95-98%), ultra-fine gypsum seed accelerator (<1.5%), pregelatinized corn flours glue crosslinking agent (1.0-2.0%), cerelose protects brilliant agent (<0.8%), the steady brilliant agent (0.1%) of Trisodium trimetaphosphate, methyl how sodium sulfonate dispersion agent (0.5-1.0%), sodium alkyl benzene sulfonate pore forming material (<0.05%), citric acid retardant (<0.05%), , slurrying gouache ratio is 0.65-0.95, wherein ultra-fine gypsum seed accelerator is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into.
Lightweight phosphorus plaster tablet weight ratio of the present invention is the weight in average of 9.5mm specification plasterboard is 4.85-5.5kg/ ㎡.
Ultralight phosphorus plaster tablet weight ratio of the present invention is the weight in average of 9.5mm specification plasterboard is <4.85kg/ ㎡.
Specific implementation process of the present invention is as follows:
1. lightweight phosphorus plaster tablet is defined as the weight in average of 9.5mm specification plasterboard is 4.85-5.5kg/ ㎡ phosphogypsum, and the weight in average that Ultralight phosphorus plaster tablet is defined as 9.5mm specification plasterboard is <4.85kg/ ㎡.
2. mixed phosphogypsum powder phosphogypsum accounts for 10-100%, and desulfurated plaster accounts for 0-90%, and the plaster of paris accounts for 0-30%; Mixed phosphogypsum material purity is greater than 70% usually, and chloride ion content is greater than 150ppm usually, mixed phosphogypsum powder raw material granularity <325 order.
3. ultra-fine gypsum seed accelerator is for accelerating time of coagulation and increasing dry wet tenacity, it is dry grinded by gypsum powder (purity >80%) processing industry glucose (5%) and is processed into (<10 micron), consumption 0.5-1.5%.
4. pregelatinized corn flours glue crosslinking agent is for increasing dry strength and the bonding phosphorus plaster tablet heart and upper and lower mask paper and burning when slowing down the drying of phosphorus plaster tablet corner, pre-gelatinized degree >95%, granularity <100 order, consumption 0.5-2.0% (, for the production of lightweight phosphorus plaster tablet, 1.0-2.0% is for the production of lightweight phosphorus plaster tablet for 0.5-1.5%).
5. cerelose protects phosphorus plaster tablet face corner burning when brilliant agent prevents in drying for the protection gypsum seed when producing ultra-fine gypsum seed and protection gypsum crystal, consumption 0.1%.
6. the steady brilliant agent of Trisodium trimetaphosphate is used for stablize phosphogypsum crystal shape, increases wet dry strength, burning when slowing down the drying of phosphorus plaster tablet corner, prevents phosphorus plaster tablet to make moist flexible type, consumption <0.1%.
7. how sodium sulfonate dispersion agent (molecular weight 7000-12000) is for reducing the water yield and reducing gouache ratio, consumption 0-1.0% for methyl.
8. the retardant such as citric acid is used for slowing down time of coagulation and reducing stirrer caking, consumption 0.01-0.05%.
9. the voidage of sodium alkyl benzene sulfonate pore forming material for increasing plasterboard and the weight of reduction plasterboard.Pore forming material is mixed (long-chain stability pore forming material accounts for 0-10%, and short chain unstable pore forming material accounts for 90-100%) by long-chain stability pore forming material and short chain unstable pore forming material.
10. burning when sucrose also can be used for producing accelerator and slowing down the drying of phosphorus plaster tablet corner, consumption 0.1-0.2%.
11. other admixtures a small amount of (as glass fibre etc.).
Claims (6)
1. lightweight phosphorus plaster tablet formula and a production method thereof, is characterized in that:
(1) phosphogypsum proportioning raw materials
Gypsum raw material comprises phosphogypsum, desulfurated plaster and the plaster of paris; The weight percent of raw material is: phosphogypsum accounts for 10-100%, and desulfurated plaster accounts for 0-90%, and the plaster of paris accounts for 0-30%; Mixed phosphogypsum material purity is greater than 70% usually, and chloride ion content is greater than 150ppm usually; Slough free-water and crystal water after mixed phosphogypsum raw material drying and calcining, then make ripe phosphogypsum powder through ageing; And as raw material production lightweight and Ultralight phosphorus plaster tablet;
(2) phosphogypsum formula slurrying
The slurrying of lightweight phosphogypsum formula comprises: ripe phosphogypsum powder, accelerator: ultra-fine gypsum seed, water, glue crosslinking agent: pregelatinized corn flours, protect brilliant agent: cerelose, steady brilliant agent: Trisodium trimetaphosphate, dispersion agent: methyl how sodium sulfonate, pore forming material: sodium alkyl benzene sulfonate, retardant: citric acid;
(3) phosphorus plaster tablet solidification cutting plate is dry
Lightweight phosphogypsum slurry is adhesion-molded with upper and lower mask paper on gypsum board production line; Lightweight phosphorus plaster tablet is finally made through the drying of solidification cutting plate.
2. a kind of lightweight phosphorus plaster tablet formula according to claim 1 and production method thereof, is characterized in that: the slurrying of lightweight phosphogypsum formula is added with ultra-fine gypsum seed: accelerator, glue crosslinking agent: pregelatinized corn flours, protect brilliant agent: cerelose, steady brilliant agent: Trisodium trimetaphosphate, dispersion agent: methyl how sodium sulfonate, pore forming material: sodium alkyl benzene sulfonate, retardant: citric acid.
3. a kind of lightweight phosphorus plaster tablet formula according to claim 1 and production method thereof, it is characterized in that: lightweight phosphorus plaster tablet component proportion by the weight percent of raw material is: ripe phosphogypsum powder is 95-98%, ultra-fine gypsum seed accelerator is <1%, pregelatinized corn flours glue crosslinking agent is 0.5-1.0%, it is <0.5% that cerelose protects brilliant agent, the steady brilliant agent of Trisodium trimetaphosphate is 0.05%, how sodium sulfonate dispersion agent is 0.5-1.0% to methyl, sodium alkyl benzene sulfonate pore forming material is <0.04%, citric acid retardant is 0.05%, pulping water terra alba is than being 0.6-0.9, wherein ultra-fine gypsum seed accelerator is by gypsum powder, and purity >80% processing industry glucose is that 5% dry grinding is processed into.
4. a kind of lightweight phosphorus plaster tablet formula according to claim 1 and 2 and production method thereof, it is characterized in that: Ultralight phosphorus plaster tablet component proportion by the weight percent of raw material is: ripe phosphogypsum powder is 95-98%, ultra-fine gypsum seed accelerator is <1.5%, pregelatinized corn flours glue crosslinking agent is 1.0-2.0%, it is <0.8% that cerelose protects brilliant agent, the steady brilliant agent of Trisodium trimetaphosphate is 0.1%, how sodium sulfonate dispersion agent is 0.5-1.0% to methyl, sodium alkyl benzene sulfonate pore forming material is <0.05%, citric acid retardant is <0.05%, , slurrying gouache ratio is 0.65-0.95, wherein ultra-fine gypsum seed accelerator is by gypsum powder, and purity >80% processing industry glucose is that 5% dry grinding is processed into.
5. a kind of lightweight phosphorus plaster tablet formula according to claim 1 or 3 and production method thereof, is characterized in that: lightweight phosphorus plaster tablet weight ratio is the weight in average of 9.5mm specification plasterboard is 4.85-5.5kg/ ㎡.
6. a kind of lightweight phosphorus plaster tablet formula according to claim 1 or 4 and production method thereof, is characterized in that: Ultralight phosphorus plaster tablet weight ratio is the weight in average of 9.5mm specification plasterboard is <4.85kg/ ㎡.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449513.5A CN105130356A (en) | 2015-07-28 | 2015-07-28 | Formula and production method for lightweight phosphogypsum board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510449513.5A CN105130356A (en) | 2015-07-28 | 2015-07-28 | Formula and production method for lightweight phosphogypsum board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105130356A true CN105130356A (en) | 2015-12-09 |
Family
ID=54716005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510449513.5A Pending CN105130356A (en) | 2015-07-28 | 2015-07-28 | Formula and production method for lightweight phosphogypsum board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105130356A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278086B (en) * | 2016-07-29 | 2018-05-04 | 宣城万佳建材股份有限公司 | A kind of light-weight environment-friendly plasterboard |
| CN110510924A (en) * | 2019-09-03 | 2019-11-29 | 泰山石膏（江阴）有限公司 | A kind of water-fast Thistle board and preparation method thereof |
| CN111018461A (en) * | 2018-10-09 | 2020-04-17 | 中建材创新科技研究院有限公司 | Water-resistant phosphorus gypsum board and preparation method thereof |
| CN112279607A (en) * | 2020-09-16 | 2021-01-29 | 昆明理工大学 | Extrusion production method of lithified phosphogypsum product |
| CN113880536A (en) * | 2021-09-23 | 2022-01-04 | 泰山石膏（襄阳）有限公司 | Preparation process of heat-preservation and heat-insulation gypsum for composite multifunctional wall |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803427A (en) * | 2006-01-23 | 2006-07-19 | 山东泰和东新股份有限公司 | Method for producing paper gypsum board using desulfurated gypsum and ardealite |
| CN101575900A (en) * | 2009-06-06 | 2009-11-11 | 泰山石膏股份有限公司 | Process for producing thistle boards from phosphogypsum and natural gypsum |
| CN101575901A (en) * | 2009-06-06 | 2009-11-11 | 泰山石膏股份有限公司 | Process for producing thistle boards from phosphogypsum, desulfurization gypsum and natural gypsum |
| CN103862565A (en) * | 2014-02-21 | 2014-06-18 | 泰山石膏股份有限公司 | Large-sized paper-surface gypsum board production process with annual yield of 60,000,000 square meters and production line thereof |
-
2015
- 2015-07-28 CN CN201510449513.5A patent/CN105130356A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1803427A (en) * | 2006-01-23 | 2006-07-19 | 山东泰和东新股份有限公司 | Method for producing paper gypsum board using desulfurated gypsum and ardealite |
| CN101575900A (en) * | 2009-06-06 | 2009-11-11 | 泰山石膏股份有限公司 | Process for producing thistle boards from phosphogypsum and natural gypsum |
| CN101575901A (en) * | 2009-06-06 | 2009-11-11 | 泰山石膏股份有限公司 | Process for producing thistle boards from phosphogypsum, desulfurization gypsum and natural gypsum |
| CN103862565A (en) * | 2014-02-21 | 2014-06-18 | 泰山石膏股份有限公司 | Large-sized paper-surface gypsum board production process with annual yield of 60,000,000 square meters and production line thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106278086B (en) * | 2016-07-29 | 2018-05-04 | 宣城万佳建材股份有限公司 | A kind of light-weight environment-friendly plasterboard |
| CN111018461A (en) * | 2018-10-09 | 2020-04-17 | 中建材创新科技研究院有限公司 | Water-resistant phosphorus gypsum board and preparation method thereof |
| CN110510924A (en) * | 2019-09-03 | 2019-11-29 | 泰山石膏（江阴）有限公司 | A kind of water-fast Thistle board and preparation method thereof |
| CN112279607A (en) * | 2020-09-16 | 2021-01-29 | 昆明理工大学 | Extrusion production method of lithified phosphogypsum product |
| CN113880536A (en) * | 2021-09-23 | 2022-01-04 | 泰山石膏（襄阳）有限公司 | Preparation process of heat-preservation and heat-insulation gypsum for composite multifunctional wall |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105130356A (en) | Formula and production method for lightweight phosphogypsum board | |
| CN100381386C (en) | Efficient retarding and water reducing agent for concrete | |
| CN104692755B (en) | A kind of ardealite based self-leveling material and preparation method thereof | |
| TW201416225A (en) | Pregelatinized starch with mid-range viscosity, and product, slurry and methods related thereto | |
| CN102173644B (en) | Pea protein concrete foaming agent and preparation method thereof | |
| CN111559922B (en) | High-strength high-toughness paper-surface gypsum board and preparation method thereof | |
| CN103613297B (en) | A kind of quick setting early strength magnesium phosphate cement of not set-retarding admixture | |
| CN104557116A (en) | Aerated concrete block and preparation method thereof | |
| CN112939561B (en) | Phosphogypsum-based light plastering gypsum and preparation method thereof | |
| CN108046651B (en) | Concrete super retarder | |
| CN114702286B (en) | Powdery micro-cement and preparation method thereof | |
| CN102964091A (en) | Porous granular instant building glue powder and preparation method thereof | |
| CN104609795A (en) | Aerated concrete block and preparation method thereof | |
| CN104119023A (en) | High-efficiency delayed coagulation water reducing agent | |
| CN114276103B (en) | Heat-preservation and heat-insulation paper-surface gypsum board and preparation method thereof | |
| CN109305793B (en) | Pitchstone thermal insulation material and preparation method thereof | |
| CN107337385A (en) | A kind of high-performance aerated tailing-bricks and preparation method thereof | |
| CN114075063B (en) | Method for preparing concrete block by using composite siliceous material and autoclaved aerated concrete block prepared by method | |
| CN103626412B (en) | A kind of preparation method of quick setting early strength magnesium phosphate cement of not set-retarding admixture | |
| CN106630862B (en) | A kind of 3D substrate dry powder and mortar raw material proportioning and production technology | |
| CN107601951B (en) | Starch syrup special for concrete and preparation method thereof | |
| CN117285311A (en) | Waterproof and fireproof multifunctional paper-faced gypsum board and preparation method thereof | |
| CN111704388A (en) | Concrete retarder and preparation method thereof | |
| CN114735998B (en) | High-performance phosphogypsum composite cementing material based on hydration synergistic effect | |
| CN106631128A (en) | Special admixture for full-lightweight ceramsite concrete and preparation method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20151209 |
|
| RJ01 | Rejection of invention patent application after publication |