CN1425630A - Water-proof gypsum block - Google Patents
Water-proof gypsum block Download PDFInfo
- Publication number
- CN1425630A CN1425630A CN03102804A CN03102804A CN1425630A CN 1425630 A CN1425630 A CN 1425630A CN 03102804 A CN03102804 A CN 03102804A CN 03102804 A CN03102804 A CN 03102804A CN 1425630 A CN1425630 A CN 1425630A
- Authority
- CN
- China
- Prior art keywords
- gypsum
- block
- cement
- slag
- waterproof
- 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.)
- Granted
Links
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 75
- 239000010440 gypsum Substances 0.000 title claims abstract description 74
- 239000004568 cement Substances 0.000 claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 24
- 239000010881 fly ash Substances 0.000 claims abstract description 20
- 229910021487 silica fume Inorganic materials 0.000 claims description 20
- 239000002994 raw material Substances 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 10
- 239000002002 slurry Substances 0.000 abstract description 5
- 238000005507 spraying Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000000151 deposition Methods 0.000 abstract 1
- 239000010456 wollastonite Substances 0.000 abstract 1
- 229910052882 wollastonite Inorganic materials 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 238000006703 hydration reaction Methods 0.000 description 5
- 230000036571 hydration Effects 0.000 description 4
- 239000002440 industrial waste Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002910 solid waste Substances 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000013078 crystal Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000011398 Portland cement Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000378 calcium silicate Substances 0.000 description 1
- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 150000004683 dihydrates Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 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
- C04B2111/20—Resistance against chemical, physical or biological attack
- C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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)
Abstract
The present invention relates to improved gypsum product for building and especially waterproof gypsum block. The waterproof gypsum block is produced with gypsum, slag, cement, flyash and wollastonite as material and through crushing, mixing into slurry while adding water, depositing to form, demoulding, and spraying water to cure. The block of the present invention is waterproof and low in production cost; and utilizing waste can protect environment. The block may be produced in automatic production line and simple production equipment.
Description
The technical field is as follows: the present invention relates to an improvement on gypsum building product, in particular, it is a water-proofing gypsum block.
Background art: the gypsum block is a wall material which is widely applied in the field of buildings, and the production technology and the construction technology are mature. The gypsum block is paid attention and loved by people due to the bright characteristics of light weight, heat preservation, heat insulation, sound insulation, convenient construction and the like.
But an important factor limiting its development is the quality of the product, which is reflected in the self gas-hardening properties of gypsum, i.e. poor water resistance. The product softening coefficient index of a production enterprise is generally below 0.5, so that the wide application of the product in the aspect of building engineering walls is limited, and the product softening coefficient index is also a major problem to be solved urgently by the production enterprise. Due to the poor water resistance of gypsum materials, gypsum blocks exhibit a high air hardness in the dry state, whereas their strength loss can reach 60% or even more when their water absorption is in the saturated state.
The invention content is as follows: the invention aims to provide a waterproof gypsum block, which can greatly improve the waterproof performance of the gypsum block by doping cement and industrial waste into building gypsum, reduce the product cost, change waste into valuable and protect the ecological environment.
The solution of the invention is: a waterproof gypsum block comprises gypsum, slag, fly ash, silica fume and cement.
The waterproof gypsum block comprises the following components in percentage by weight:
60-90% of gypsum, 3-20% of slag, 3-15% of cement, 0-15% of fly ash and 0-15% of silica fume.
The preferred composition ranges for the water resistant gypsum block are (weight percent):
60-80% of gypsum, 5-15% of slag, 5-8% of cement, 0-10% of fly ash and 0-10% of silica fume.
The optimal components of the waterproof gypsum block are as follows (weight percentage):
60% of gypsum, 15% of slag, 5% of cement, 10% of fly ash and 10% of silica fume.
Selection of raw materials:
1. the building gypsum is β type semi-hydrated gypsum, and the powder density is 1100Kg/m33.2 percent of fineness, 20min of initial setting time, 25min of final setting time, 10.5MPa of compressive strength and 4.4MPa of rupture strength.
2. The cement is 425# ordinary portland cement, the screen residue of a 4900-mesh sieve with fineness is less than 10 percent, and the specific surface area is 320m2and/Kg or so.
3. The fly ash is industrial solid waste and has the density of 2.16g/cm3Bulk density 820g/m3And the screen residue of the sieve with 4900 holes is 8 percent. The chemical components are as follows: LOSS-2.34%, SiO2-61.49％、Al2O3-22.12％、Fe2O3-6.41％、CaO-1.63％、MgO-1.91％、SO3-0.38％、K2O-2.59％、Na2O-0.62％。
4. The slag is industrial solid waste with the density of 1200kg/m3The fineness requires that the sieve residue of the 4900-hole sieve is less than 10 percent. The chemical components are as follows: LOSS-1.36%, SiO2-34.80％、Al2O3-9.67％、Fe2O3-1.78％、CaO-40.69％、MgO-8.64％。
5. The silica fume is industrial solid waste, and the dry capacity of the silica fume is 300Kg/m3Specific surface area 490m2Perkg. The chemical components are as follows: SiO 22-94.00％、Al2O3-0.40％、Fe2O3-0.15％、CaO-0.30％、MgO-0.90％。
The production method of the waterproof gypsum block comprises the following steps:
1. the ingredients are mixed according to the formula of the invention and then are uniformly stirred;
2. adding water into the uniformly stirred dry mixed material for stirring to form uniform slurry;
3. pouring and molding, namely pouring slurry into the hollow block mold with the core, wherein the time from pouring to core rod extraction is 5-8min, so that the block is demoulded and molded;
4. and (5) maintenance: and (3) performing field open-air curing, demolding and forming for 24 hours, then starting watering and curing, keeping a certain humidity, and stacking the building blocks after curing for 3 days.
The formula of the waterproof gypsum block disclosed by the invention comprises the following components in percentage by weight: slag, fly ash and silica fume. Besides the gypsum hydration to generate crystal to form a certain strength, it is mainly hydration product CaSO4·2H2O and cement hydration products Ca (OH)2And active SiO in industrial waste residues2、Al2O3The reaction produces hydrated calcium silicate and hydrated calcium aluminate with certain strength and produces crystal-ettringite with super-strength function. The strength and stability of the hydration product are much greater than those of crystal structure network of dihydrate gypsum, and the water resistance of gypsum material can be greatly improved. The hydration reaction equation is as follows: 。
because the industrial waste is added in the formula, the waste is utilized, the production cost is reduced, and the ecological environment is protected.
Table 1 shows the physical property index comparison table of the waterproof gypsum block and the gypsum block of the present invention
TABLE 1
| Sample numbering | Formula of gypsum building block | Coefficient of softening | Compressive strength MPa | Flexural strength MPa | Water absorption rate (％) |
| 11-16 | Pure gypsum | 0.36 | 11.60 | 4.2 | 34.0 |
| 11-8 | 425# Cement 5% 15 percent of slag 10 percent of silica fume The balance being gypsum | 0.93 | 10.7 | 3.4 | 6.0 |
| 11-10 | 425# Cement 5% 10 percent of fly ash 10 percent of silica fume 15 percent of slag The balance being gypsum | 0.81 | 10.7 | 2.8 | 8.0 |
| 11-13 | 425# Cement 10% 10 percent of fly ash 20 percent of slag The balance being gypsum | 0.96 | 15.2 | 1.6 | 9.0 |
The experimental results in Table 1 show that after cement, fly ash, slag and silica fume are added into the formula disclosed by the invention, the influence on the performance of the gypsum material is large, the softening coefficient of the gypsum material can be improved by 108-167%, the water absorption is reduced by 35-82%, the compressive strength is basically kept unchanged, and the compressive strength of the sample No. 11-13 is increased by 30%.
Table 2 is a comparison table of the volume weight of the waterproof gypsum block and the gypsum block
TABLE 2
| Sample numbering | Formula of gypsum building block | Volume weight (Kg/m3) |
| 11-16 | Pure gypsum | 1130 |
| 11-8 | 5% of cement, 15% of slag, 10% of silica fume and the balance of gypsum | 1480 |
| 11-10 | 5% of cement, 10% of fly ash, 10% of silica fume, 15% of slag and the balance of gypsum | 1440 |
| 11-13 | 10% of cement, 10% of fly ash, 20% of slag and the balance of gypsum | 1560 |
The volume weight of the gypsum block is improved by about 30 percent compared with the volume weight of a pure gypsum block, and the volume weight of the gypsum block changes to a certain extent along with the increase of cement parameters and different volume weights of industrial waste materials.
Product performance testing
The pilot test waterproof gypsum block is detected by a Xinjiang building material nonmetal product quality supervision inspection station, and each performance index of the pilot test waterproof gypsum block is superior to that of domestic similar products, which is detailed in Table 3
TABLE 3
| The invention sample Article number | Mass per unit area (kg/m2) | Breaking load (N) | Coefficient of softening | Impact strength | |
| Dry state | Water saturated state | ||||
| 11-10 | 60.4 | 2417 | 1980 | 0.82 | Qualified |
| 11-13 | 63.2 | 3702 | 3138 | 0.85 | Qualified |
Construction application conditions
Inventive intermediate test product 1000m2The engineering trial application is carried out in the academic comprehensive building of Xinjiang education college, and a good effect is achieved. The pilot product is installed on an inner partition wall of a toilet of a comprehensive building, the flatness, the size deviation and the physical and mechanical properties of the pilot product can meet the requirements of field installation and construction, and the water resistance of the pilot product is praised by construction units.
The invention can be popularized and applied on a gypsum block production line with high automation degree and strict process parameter control, can also be applied on gypsum block production equipment with simple process and poor equipment condition, and has high use value.
The specific implementation mode is as follows:
the formula of the waterproof gypsum block in the embodiment 1 is as follows (weightpercentage):
60% of gypsum, 15% of slag, 5% of cement, 10% of fly ash and 10% of silica fume.
The formula of the waterproof gypsum block in the embodiment 2 is as follows (weight percentage):
15% of slag, 5% of cement, 10% of silica fume and the balance of gypsum.
The formula of the waterproof gypsum block in the embodiment 3 is as follows (weight percentage):
15% of slag, 5% of cement, 10% of fly ash, 10% of silica fume and the balance of gypsum.
The formulation of the waterproof gypsum block of example 4 is (weight percent):
20% of slag, 10% of cement, 10% of fly ash and the balance of gypsum.
The production method comprises the following steps:
1. preparing materials according to the formula, adding the materials into a stirrer and uniformly stirring;
2. adding water into the mixture for stirring to form uniform slurry;
3. pouring and molding, namely pouring slurry into the hollow block mold with the core, wherein the time from pouring to core rod pulling is 6min, so that the block is molded by demolding;
4. maintaining at 18-30 deg.C, spraying water to maintain certain humidity 24 hr after molding, curing for 3 days, stacking building blocks, and curing for 14 days with twice spraying water each day. The experimental time is summer, the water evaporation is fast, and local covering maintenance is adopted to prevent the water evaporation from being too fast.
Claims (6)
1. The waterproof gypsum block is characterized by comprising the following raw materials in percentage by weight: 60-90% of gypsum, 3-20% of slag, 3-15% of cement, 0-15% of fly ash and 0-15% of silica fume.
2. The waterproof gypsum block of claim 1, wherein the weight percentages of the raw materials are: 60-80% of gypsum, 5-15% of slag, 5-8% of cement, 0-10% of fly ash and 0-10% of silica fume.
3. The waterproof gypsum block of claim 1, wherein the weight percentages of the raw materials are: 60% of gypsum, 15% of slag, 5% of cement, 10% of fly ash and 10% of silica fume.
4. The waterproof gypsum block of claim 1, wherein the weight percentages of the raw materials are: 70% of gypsum, 15% of slag, 5% of cement and 10% of silica fume.
5. The waterproof gypsum block of claim 1, wherein the weight percentages of the raw materials are: 60% of gypsum, 15% of slag, 5% of cement, 10% of silica fume and 10% of fly ash.
6. The waterproof gypsum block of claim 1, wherein the weight percentages of the raw materials are: 60% of gypsum, 20% of slag, 10% of cement and 10% of fly ash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031028047A CN1260166C (en) | 2003-01-14 | 2003-01-14 | Water-proof gypsum block |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031028047A CN1260166C (en) | 2003-01-14 | 2003-01-14 | Water-proof gypsum block |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1425630A true CN1425630A (en) | 2003-06-25 |
| CN1260166C CN1260166C (en) | 2006-06-21 |
Family
ID=4790024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031028047A Expired - Fee Related CN1260166C (en) | 2003-01-14 | 2003-01-14 | Water-proof gypsum block |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1260166C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180647A (en) * | 2011-01-28 | 2011-09-14 | 内蒙古科技大学 | Desulfurized building gypsum water-proof building block |
| CN106365580B (en) * | 2016-09-26 | 2018-08-24 | 王远国 | Composite modified gypsum block and preparation method thereof |
| CN111268984A (en) * | 2019-12-11 | 2020-06-12 | 湖北田鑫建材有限公司 | Phosphogypsum building block and preparation method thereof |
| CN111533523A (en) * | 2020-05-08 | 2020-08-14 | 张延年 | High-strength desulfurized gypsum block and preparation method thereof |
-
2003
- 2003-01-14 CN CNB031028047A patent/CN1260166C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102180647A (en) * | 2011-01-28 | 2011-09-14 | 内蒙古科技大学 | Desulfurized building gypsum water-proof building block |
| CN106365580B (en) * | 2016-09-26 | 2018-08-24 | 王远国 | Composite modified gypsum block and preparation method thereof |
| CN111268984A (en) * | 2019-12-11 | 2020-06-12 | 湖北田鑫建材有限公司 | Phosphogypsum building block and preparation method thereof |
| CN111533523A (en) * | 2020-05-08 | 2020-08-14 | 张延年 | High-strength desulfurized gypsum block and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1260166C (en) | 2006-06-21 |
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Granted publication date: 20060621 Termination date: 20120114 |