CN111689748B - Special binder for microcrystalline glass - Google Patents
Special binder for microcrystalline glass Download PDFInfo
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- CN111689748B CN111689748B CN202010507659.1A CN202010507659A CN111689748B CN 111689748 B CN111689748 B CN 111689748B CN 202010507659 A CN202010507659 A CN 202010507659A CN 111689748 B CN111689748 B CN 111689748B
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- microcrystalline glass
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/146—Calcium sulfate hemi-hydrate with a specific crystal form alpha-hemihydrate
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/02—Methods and apparatus for dehydrating gypsum
- C04B11/028—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained
- C04B11/032—Devices therefor characterised by the type of calcining devices used therefor or by the type of hemihydrate obtained for the wet process, e.g. dehydrating in solution or under saturated vapour conditions, i.e. to obtain alpha-hemihydrate
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
-
- 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
- C04B11/00—Calcium sulfate cements
- C04B11/26—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke
- C04B11/262—Calcium sulfate cements strating from chemical gypsum; starting from phosphogypsum or from waste, e.g. purification products of smoke waste gypsum other than phosphogypsum
- C04B11/264—Gypsum from the desulfurisation of flue gases
-
- 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
- C04B2111/00637—Uses not provided for elsewhere in C04B2111/00 as glue or binder for uniting building or structural 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
- C04B2111/20—Resistance against chemical, physical or biological attack
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Abstract
The invention relates to the field of building materials, in particular to a special binder for microcrystalline glass; the special binder for the microcrystalline glass comprises alpha-type high-strength gypsum, tailing sand and a volume stabilizer; wherein, the alpha-type high-strength gypsum is prepared by dissolving and recrystallizing industrial by-product gypsum in a saturated vapor medium; the volume stabilizer is a mixture of a swelling reducing agent and a shrinking reducing agent; the expansion reducing agent is tartaric acid; the shrinkage reducing agent is type II anhydrous anhydrite; the mass ratio of the alpha-type high-strength gypsum to the tailing sand to the volume stabilizer is 30-50: 50-70: 1 to 3. The pH value of the special binder for the microcrystalline glass is neutral, and the binder has good compatibility with the microcrystalline glass, and is particularly suitable for building and bonding the microcrystalline glass; compared with the binder in the prior art, the binder special for the microcrystalline glass has the advantages of high strength development speed, high construction efficiency, high bonding strength, difficult shedding, good dimensional stability and difficult hollowing; and the cost is low.
Description
Technical Field
The invention relates to the field of building materials, in particular to a special binder for microcrystalline glass.
Background
The microcrystalline glass, also called microcrystalline jade, integrates the triple advantages of glass, ceramics and natural stone. The common glass is fragile because the internal atomic arrangement is not regular, the microcrystalline glass is composed of crystals like ceramics, the atomic arrangement is regular, the glass has stronger toughness than glass, and has higher brightness than ceramics, the performance is superior to that of natural stone, and the microcrystalline glass can be used for building curtain walls and indoor high-grade decoration and also can be made into mechanical structural materials, electronic and electrical insulating materials, bottom plate materials of large-scale integrated circuits, microwave oven heat-resistant cracking vessels, chemical and anticorrosive materials, mine wear-resistant materials and the like.
The tailings sand is waste left in mine production, and the treatment of tailings becomes a troublesome problem for many mine enterprises due to large discharge amount. The components of the tailing sand are similar to those of the microcrystalline glass raw material, and along with the increasing technology, the tailing sand can become the raw material for producing the microcrystalline glass by adding chemical elements. The microcrystalline glass is produced by using the tailing sand, so that the production cost is greatly reduced, and the performance of the product is better. The microcrystalline glass can be used as a wall enclosure material and an outer wall decoration material with high efficiency, energy conservation and heat preservation for the field of buildings.
When the glass ceramics are used as wall enclosure materials and outer wall decoration materials, the glass ceramics need to be fixed by adopting bonding agents for masonry or adhesion. At present, most of the binders for building materials are cement-based products, the main components of the cement-based binders are calcium silicate, calcium sulphoaluminate, calcium oxide and the like, and the pH value of the whole system is about 12.5 and is alkaline. However, when the cement-based binder is used for building and bonding the microcrystalline glass, alkaline substances in the cement and siliceous materials in the microcrystalline glass are subjected to chemical reaction, so that the surface of the microcrystalline glass is pulverized, and the bonding quality is influenced; and the cement-based binder is generally slow in hydration speed and development of strength, so that the construction speed is influenced. In addition, other organic binders in the prior art have poor durability, are difficult to realize the same service life as buildings, and have high production and use cost because VOC emission influences the indoor environment.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a special binder for microcrystalline glass; the pH value of the binder is neutral, and the binder has good compatibility with the microcrystalline glass, so that the binder is particularly suitable for building and bonding the microcrystalline glass; meanwhile, the adhesive has the advantages of high strength development speed, high construction efficiency, high adhesive strength, difficult falling, good dimensional stability and difficult hollowing; and the cost is low.
Specifically, the special binder for the microcrystalline glass comprises alpha-type high-strength gypsum, tailing sand and a volume stabilizer;
wherein the alpha-type high-strength gypsum is prepared by dissolving and recrystallizing industrial by-product gypsum in a saturated water vapor medium; the volume stabilizer is a mixture of a swelling reducing agent and a shrinking reducing agent; the expansion reducing agent is tartaric acid; the shrinkage reducing agent is type II anhydrous anhydrite;
the mass ratio of the alpha-type high-strength gypsum to the tailing sand to the volume stabilizer is 30-50: 50-70: 1 to 3.
The invention firstly proposes that gypsum is used for replacing cement, and tailings sand, volume stabilizer and other additives with low cost are compounded, and the obtained binder effectively solves the problems of cement-based binder and organic binder in the prior art when being used for building and bonding microcrystalline glass, and avoids the problems of easy alkali-aggregate reaction, poor durability and the like of cement and microcrystalline glass.
The invention discovers that the traditional gypsum binder has poor water resistance, and further can not meet the requirement of the binder special for the microcrystalline glass; the alpha-type high-strength gypsum prepared by a specific process is selected and compounded with other additives, so that the bonding strength of the binder is improved, the water resistance of the binder is improved, and the product performance is improved.
Preferably, the main component of the industrial by-product gypsum is calcium sulfate dihydrate (CaSO)4·2H2O), the purity is more than 85%;
further, the industrial byproduct gypsum is selected from one or more of flue gas desulfurization gypsum, phosphogypsum, citric acid gypsum, titanium gypsum, salt gypsum and lactic acid gypsum;
further, the alpha-type high-strength gypsum (alpha-CaSO)4·1/2H2O) has a dry compressive strength of 45 to 60MPa, a particle size of 0.1 to 300 μm, and an average particle diameter of 10 to 50 μm.
Preferably, the dissolving and the recrystallization are carried out for 3-5 hours at 130-150 ℃ and 0.6-0.7 MPa;
further, the dissolving and the recrystallization are carried out for 4-4.5 hours at 135-145 ℃ and 0.63-0.67 MPa.
According to the invention, after the industrial byproduct gypsum is dissolved and recrystallized under the conditions, the obtained alpha-type high-strength gypsum can effectively improve the mechanical strength of the binder, and guarantee is provided for building and bonding the microcrystalline glass.
In the invention, the volume stabilizer is formed by mixing tartaric acid (swelling reducing agent) and type II anhydrous anhydrite (shrinkage reducing agent); wherein, the expansion reducing agent tartaric acid can effectively reduce the early expansion of gypsum, and the shrinkage reducing agent II type anhydrous anhydrite can compensate the later drying shrinkage of a hardened body; the two are compounded in a specific mass ratio, so that the binder has good volume stability in the hydration and drying processes, and the phenomenon that hollowing is formed due to the internal stress generated by the mismatching of the size change rate of the binder and the microcrystalline glass in the hydration process is effectively avoided.
Preferably, the mass ratio of the tartaric acid to the type II anhydrite is 1: 45-55;
as the best technical scheme, the mass ratio of the tartaric acid to the type II anhydrous anhydrite is 1: 50;
wherein the average particle size of the II type anhydrite is 10-80 mu m.
Preferably, the mass content of soluble substances in the tailings sand is not more than 0.5%; wherein the particle size is 30-50% of 100-1000 μm, and 20-70% of 10-100 μm.
The tailing sand of the invention has the grain size of 100-1000 mu m accounting for 30-50% of the total amount of the tailing sand, and the grain size of 10-100 mu m accounting for 20-70% of the total amount of the tailing sand; in a specific embodiment, the tailings sand is molybdenum tailings; the tailings sand of the present invention is not limited to molybdenum tailings.
Preferably, the binder special for the microcrystalline glass further comprises a setting time regulator, redispersible latex powder, a thickening agent, a waterproof agent and a soluble salt adsorbent.
Preferably, the setting time regulator is an amino acid-based setting time regulator.
Preferably, the redispersible latex powder is water-resistant redispersible latex powder; the water-resistant re-dispersible latex powder can effectively improve the softening coefficient of the binder, thereby improving the water resistance of the binder.
Preferably, the thickening agent is selected from one or more of hydroxypropyl methyl cellulose (HPMC), starch ether and bentonite; preferably hydroxypropyl methylcellulose.
Preferably, the waterproof agent is selected from one or more of emulsified paraffin, silica fume and waterproof silane; preferably emulsified paraffin.
Preferably, the soluble salt adsorbent is selected from one or more of calcined kaolin, montmorillonite, sepiolite and diatom ooze; preferably calcined kaolin.
In a specific implementation mode, the content of soluble salt in the tailing sand is high, and soluble salt can be effectively reduced to be separated out at a bonding interface by adding a soluble salt adsorbent, so that the bonding strength of the interface is ensured.
Preferably, the binder special for the microcrystalline glass comprises the following components in parts by weight:
preferably, the binder special for the microcrystalline glass comprises the following components in parts by weight:
as a better technical scheme of the invention, the special binder for the microcrystalline glass comprises the following components in parts by weight:
wherein the alpha-type high-strength gypsum is prepared by dissolving and recrystallizing industrial by-product gypsum in a saturated steam medium at 135-145 ℃ and 0.63-0.67 MPa for 4-4.5 h; the volume stabilizer is formed by mixing tartaric acid and the II type anhydrous anhydrite according to the mass ratio of 1: 50.
The invention also provides a preparation method of the special binder for the microcrystalline glass, which is prepared by uniformly mixing all the components.
The special binder for the microcrystalline glass provided by the invention has the characteristic of early strength, and the binding strength can reach more than 0.4MPa in 1 day.
The invention has the beneficial effects that:
(1) the pH value of the special binder for the microcrystalline glass is neutral, and the binder has good compatibility with the microcrystalline glass, and is particularly suitable for building and bonding the microcrystalline glass;
(2) compared with the binder in the prior art, the binder special for the microcrystalline glass has the advantages of high strength development speed, high construction efficiency, high bonding strength, difficult shedding, good dimensional stability and difficult hollowing; and the cost is lower;
(3) the adhesive prepared by compounding specific components can realize synergistic interaction, has the characteristics of high mechanical strength, high adhesion and high durability, and also has the early strength characteristic, and the adhesion strength can reach more than 0.4MPa in 1 day.
Detailed Description
The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the following examples, the amino acid-based setting time regulators PE referred to are available from SISISIIT 2000, Italy; the water-resistant redispersible latex powder is purchased from Wake; the emulsified paraffin was purchased from Ningbo Han Sheng chemical Co., Ltd;
example 1
The embodiment provides a special binder for microcrystalline glass, which comprises the following components in parts by weight:
wherein the alpha-type high-strength gypsum is prepared by dissolving and recrystallizing industrial by-product gypsum in a saturated water vapor medium at 140 ℃ and 0.65MPa for 4 hours; the dry compression strength is 50MPa, the granularity is 0.1-100 mu m, and the average grain diameter is 12-15 mu m;
the volume stabilizer is formed by mixing tartaric acid and the II type anhydrous anhydrite according to the mass ratio of 1: 50;
in the molybdenum tailings, the particle size of 100-1000 microns accounts for 40%, and the particle size of 10-100 microns accounts for 60%.
Example 2
The embodiment provides a special binder for microcrystalline glass, which comprises the following components in parts by weight:
wherein the dry compressive strength of the alpha-type high-strength gypsum is 50MPa, the granularity is 0.1-100 mu m, and the average particle size is 12-15 mu m;
the volume stabilizer is formed by mixing tartaric acid and the II type anhydrous anhydrite according to the mass ratio of 1: 50;
in the molybdenum tailings, the particle size of 100-1000 microns accounts for 45%, and the particle size of 10-100 microns accounts for 55%.
Example 3
The embodiment provides a special binder for microcrystalline glass, which comprises the following components in parts by weight:
wherein the dry compressive strength of the alpha-type high-strength gypsum is 45MPa, the granularity is 0.1-80 mu m, and the average particle size is 10-12 mu m;
the volume stabilizer is tartaric acid and the type II anhydrous anhydrite according to the mass ratio of 1: 50, mixing;
in the molybdenum tailings, the grain size is 100-1000 microns and accounts for 42%, and the grain size is 10-100 microns and accounts for 58%.
Comparative example 1
The present comparative example provides a binder special for microcrystalline glass, and the difference from example 1 is only that: the alpha-type high-strength gypsum is replaced by common building gypsum.
Comparative example 2
The present comparative example provides a binder special for microcrystalline glass, and the difference from example 1 is only that: the volume stabilizer is 525 sulphoaluminate cement.
Comparative example 3
The present comparative example provides a binder special for microcrystalline glass, and the difference from example 1 is only that: the weight parts of the components are different, and the concrete is as follows:
test example 1
The test example tests the performance of the binder special for the microcrystalline glass in the embodiments 1 to 3 and the comparative examples 1 to 3, and the specific operations are as follows: bonding the microcrystalline glass special binder for the microcrystalline glass of the examples 1-3 and the comparative examples 1-3 to the microcrystalline glass respectively; the test results are shown in table 1;
TABLE 1 Performance test of Binders for glass ceramics for examples 1 to 3 and comparative examples 1 to 3
Although the invention has been described in detail hereinabove by way of general description, specific embodiments and experiments, it will be apparent to those skilled in the art that many modifications and improvements can be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (12)
1. The special binder for the microcrystalline glass is characterized by comprising the following components in parts by weight:
wherein the alpha-type high-strength gypsum is prepared by dissolving and recrystallizing industrial by-product gypsum in a saturated water vapor medium; the volume stabilizer is a mixture of a swelling reducing agent and a shrinking reducing agent; the expansion reducing agent is tartaric acid; the shrinkage reducing agent is type II anhydrous anhydrite; the mass ratio of the tartaric acid to the type II anhydrous anhydrite is 1: 45-55.
2. The binder special for glass ceramics according to claim 1, wherein the main component of the industrial by-product gypsum is calcium sulfate dihydrate, and the purity is 85% or more.
3. The special binder for microcrystalline glass as claimed in claim 2, wherein the industrial by-product gypsum is one or more selected from flue gas desulfurization gypsum, phosphogypsum, citric acid gypsum, titanium gypsum, salt gypsum and lactic acid gypsum.
4. The binder special for microcrystalline glass as claimed in claim 3, wherein the alpha-type high-strength gypsum has a dry compressive strength of 45-60 MPa, a particle size of 0.1-300 μm, and an average particle size of 10-50 μm.
5. The binder for glass ceramics according to any one of claims 1 to 4, wherein the dissolution and recrystallization are carried out at 130 to 150 ℃ and 0.6 to 0.7MPa for 3 to 5 hours.
6. The binder for glass ceramics according to claim 5, wherein the dissolution and recrystallization are carried out at 135 to 145 ℃ and 0.63 to 0.67MPa for 4 to 4.5 hours.
7. The special binder for microcrystalline glass as claimed in claim 1, wherein the mass ratio of tartaric acid to type II anhydrite is 1: 50.
8. the binder special for glass ceramics as claimed in claim 7, wherein the average particle size of the type II anhydrite is 10 to 80 μm.
9. The special binder for glass ceramics according to claim 1, characterized in that the mass content of soluble substances in the tailings sand is not more than 0.5%; wherein the particle size is 30-50% of 100-1000 μm, and 20-70% of 10-100 μm.
10. The binder special for glass ceramics according to claim 1, wherein the setting time adjuster is an amino acid-based setting time adjuster;
and/or the redispersible emulsion powder is water-resistant redispersible emulsion powder;
and/or the thickening agent is selected from one or more of hydroxypropyl methyl cellulose, starch ether and bentonite;
and/or the waterproof agent is selected from one or more of emulsified paraffin, silica fume and waterproof silane;
and/or the soluble salt adsorbent is selected from one or more of calcined kaolin, montmorillonite, sepiolite and diatom ooze.
11. The special binder for microcrystalline glass as claimed in claim 1, which comprises the following components in parts by weight:
12. the special binder for microcrystalline glass as claimed in claim 11, which comprises the following components in parts by weight:
wherein the alpha-type high-strength gypsum is prepared by dissolving and recrystallizing industrial by-product gypsum in a saturated steam medium at 135-145 ℃ and 0.63-0.67 MPa for 4-4.5 h; the volume stabilizer is tartaric acid and the type II anhydrous anhydrite according to the mass ratio of 1: 50 and mixing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010507659.1A CN111689748B (en) | 2020-06-05 | 2020-06-05 | Special binder for microcrystalline glass |
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| CN202010507659.1A CN111689748B (en) | 2020-06-05 | 2020-06-05 | Special binder for microcrystalline glass |
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| CN111689748B true CN111689748B (en) | 2021-08-17 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101458417B1 (en) * | 2014-01-08 | 2014-11-07 | 주식회사 에코마이스터 | Hybrid mortar composition for inflators and road pavements using slag balls |
| CN105731972A (en) * | 2016-02-25 | 2016-07-06 | 张学健 | Natural anhydrite self-leveling anti-crack mortar |
| CN106800401A (en) * | 2017-01-13 | 2017-06-06 | 河北睿索固废工程技术研究院有限公司 | A kind of gypsum based self-leveling mortar using molybdic tailing as filler |
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2020
- 2020-06-05 CN CN202010507659.1A patent/CN111689748B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101458417B1 (en) * | 2014-01-08 | 2014-11-07 | 주식회사 에코마이스터 | Hybrid mortar composition for inflators and road pavements using slag balls |
| CN105731972A (en) * | 2016-02-25 | 2016-07-06 | 张学健 | Natural anhydrite self-leveling anti-crack mortar |
| CN106800401A (en) * | 2017-01-13 | 2017-06-06 | 河北睿索固废工程技术研究院有限公司 | A kind of gypsum based self-leveling mortar using molybdic tailing as filler |
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