CN108117361B - Water-resistant phosphogypsum self-leveling material - Google Patents
Water-resistant phosphogypsum self-leveling material Download PDFInfo
- Publication number
- CN108117361B CN108117361B CN201810010460.0A CN201810010460A CN108117361B CN 108117361 B CN108117361 B CN 108117361B CN 201810010460 A CN201810010460 A CN 201810010460A CN 108117361 B CN108117361 B CN 108117361B
- Authority
- CN
- China
- Prior art keywords
- water
- agent
- phosphogypsum
- self
- material according
- 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.)
- Active
Links
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
- C04B28/145—Calcium sulfate hemi-hydrate with a specific crystal form
- C04B28/147—Calcium sulfate hemi-hydrate with a specific crystal form beta-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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00103—Self-compacting mixtures
-
- 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
- C04B2111/10—Compositions or ingredients thereof characterised by the absence or the very low content of a specific material
-
- 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
- C04B2111/28—Fire resistance, i.e. materials resistant to accidental fires or high temperatures
-
- 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)
- Crystallography & Structural Chemistry (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 invention discloses water-resistant phosphogypsum self-leveling materials, which belong to the technical field of building materials and comprise, by mass, 40-60% of phosphogypsum, 3-10% of cement, 8-12% of fly ash, 10-15% of quartz sand, 5-8% of pH regulator, 3-7% of activator, 3-7% of mica powder, 2-5% of redispersible latex powder, 1-3% of water reducing agent, 0.5-1.5% of water retaining agent, 0.3-0.8% of retarder, 0.2-0.8% of waterproof agent and 0.2-0.8% of defoaming agent.
Description
Technical Field
The invention relates to the field of building materials, in particular to water-resistant phosphogypsum self-leveling materials.
Background
The phosphogypsum is the most main industrial byproduct in the production process of phosphorus chemical industry, and is a precipitate which is discharged by phosphate fertilizer enterprises in the production process and takes calcium sulfate dihydrate as a main component, the byproduct phosphogypsum has large amount and great environmental pollution, and the application of the phosphogypsum is a problem which is solved by the field.
The self-leveling materials are materials for leveling the building ground, and at present, a lot of reports of using phosphogypsum as the self-leveling materials exist, such as patent publication No. CN104692755A and patent publication No. of phosphogypsum-based self-leveling materials and preparation methods thereof, and Chinese patent application, such as patent publication No. CN102643065A and patent publication No. gypsum-based self-leveling materials;
however, the biggest problem of the existing phosphogypsum β semi-water self-leveling is the water resistance problem, the test block made of the existing phosphogypsum-based self-leveling material is corroded on the surface after being soaked in water for 24 hours, the compressive strength is which is generally not higher than 25MPa, and the content of the phosphogypsum in the existing phosphogypsum-based self-leveling material is lower than 30 percent which is generally lower than , so that the phosphogypsum is not fully utilized.
Disclosure of Invention
The invention aims to provide water-resistant phosphogypsum self-leveling materials to solve the problems.
In order to achieve the purpose, the invention adopts the technical scheme that water-resistant phosphogypsum self-leveling materials consist of the following components in percentage by mass:
40-60% of phosphogypsum, 3-10% of cement, 8-12% of fly ash, 10-15% of quartz sand, 5-8% of pH regulator, 3-7% of excitant, 3-7% of mica powder, 2-5% of redispersible latex powder, 1-3% of water reducer, 0.5-1.5% of water retaining agent, 0.3-0.8% of retarder, 0.2-0.8% of waterproof agent and 0.2-0.8% of defoaming agent;
the total is 100%.
The phosphogypsum is preferably β type hemihydrate gypsum, β type hemihydrate gypsum is rapidly formed under superheated unsaturated steam, so that the crystallinity of crystal grains is poor, loose, fine and irregular, the shape is mostly flaky, a small amount of crystal grains are in a sheet crystal form, and the β type hemihydrate gypsum has high yield and low cost.
The material of the invention excites gypsum, cement and fly ash by an exciting agent, and adjusts the pH value of slurry by matching with a pH regulator to adjust the pH value of the phosphogypsum slurry to an alkaline environment which is most suitable for crystal growth, dihydrate gypsum crystals in a hardened body are tiny and needle-like, mainly needle-like crystals with larger long diameter are interlaced in a criss-cross manner from , the lapping degree between the crystals is higher, the crystal contact points are more, and a compact structure is generated, thereby obviously improving the compressive strength.
The addition of hydraulic material and waterproof material changes the composition of slurry phase in aspect, reduces solubility, increases softening coefficient, and increases hydrophobicity of material in aspect by reducing surface energy of material.
The invention obviously improves the water resistance of the material by adding a proper amount of mica powder and mutually cooperating with other components: the Mohs hardness of the mica powder is 2-3, and the mica powder is elastic, bendable and good in abrasion resistance and wear resistance; the slurry is heat-resistant and insulating, is insoluble in acid-base solution, has stable chemical properties, has a unique two-dimensional sheet-shaped barrier and ultraviolet light shielding effect, has a stable chemical structure, and effectively improves the impermeability, weather resistance, wear resistance and corrosion resistance of the slurry.
In addition, the material of the invention does not contain any radioactive element, and is green and environment-friendly.
The preferable technical scheme is that the composition comprises the following components in percentage by mass:
50% of phosphogypsum, 5.2% of cement, 8% of fly ash, 12.3% of quartz sand, 6% of pH regulator, 5% of excitant, 5% of mica powder, 4% of redispersible latex powder, 2% of water reducing agent, 1% of water retaining agent, 0.5% of retarder, 0.5% of waterproof agent and 0.5% of defoaming agent.
Preferably, the pH regulator is calcium hydroxide.
As a preferable technical scheme, the redispersible rubber powder is vinyl acetate and ethylene copolymer rubber powder. For example, the redispersible emulsion powder MK-1620 produced by chemical Limited of Jinnayue Ka can be used.
Preferably, the water-retaining agent is hydroxypropyl methylcellulose.
According to a preferable technical scheme, the waterproof agent is organic silicon.
As a preferred technical scheme, the defoaming agent is polyether modified silicon.
According to a preferable technical scheme, the water reducing agent is a polycarboxylic acid water reducing agent.
As a preferred technical scheme, the retarder is citric acid.
As a preferable technical scheme, the excitant is potassium carbonate.
Compared with the prior art, the invention has the advantages that: the material has high strength, the absolute dry compressive strength reaches 30-35MPa, the water resistance is high, the surface of a test block soaked in water for 48 hours is not corroded, the softening coefficient is more than 0.6, and the material does not contain any radioactive element and is environment-friendly.
Detailed Description
The invention will now be further illustrated with reference to the following examples.
Example 1:
water-resistant phosphogypsum self-leveling material comprises the following components in percentage by mass:
51% of phosphogypsum, 3% of cement, 10% of fly ash, 10% of quartz sand, 5% of calcium hydroxide, 7% of potassium carbonate, 3% of mica powder, 5% of vinyl acetate and ethylene copolymerized gum powder, 3% of polycarboxylic acid water reducing agent, 0.8% of hydroxypropyl methyl cellulose, 0.6% of citric acid, 0.8% of waterproof agent and 0.8% of defoaming agent.
The preparation method comprises the following steps:
the required tools comprise hand-held stirrers (with power of 1220W and rotation speed of 0-800 per minute), stirring barrels, two electronic scales (with accuracy of 0.1 g and 0.01 g), mixers and a plurality of beakers.
1, accurately metering the materials, adding the materials into a mixer, and uniformly stirring the materials for later use;
2, accurately measuring the stirring water in proportion and adding the water into a stirring barrel;
3, switching on a power supply of the stirrer, putting the stirrer into a stirring barrel, stirring at a low speed, slowly adding a specified amount of uniformly mixed powder, and stirring for 2 minutes and 30 seconds; standing for 30 seconds, and then stirring at high speed for 2 minutes to prepare the self-leveling slurry.
Example 2
water-resistant phosphogypsum self-leveling material comprises the following components in percentage by mass:
50% of phosphogypsum, 5.2% of cement, 8% of fly ash, 12.3% of quartz sand, 6% of calcium hydroxide, 5% of potassium carbonate, 5% of mica powder, 4% of vinyl acetate and ethylene copolymerized rubber powder, 2% of polycarboxylic acid water reducing agent, 1% of hydroxypropyl methyl cellulose, 0.5% of citric acid, 0.5% of waterproof agent and 0.5% of defoaming agent;
the preparation method is the same as that of example 1.
Comparative example 1:
compared with the embodiment 2, the mica powder is not added, and the rest components and the proportion are the same as the embodiment 2.
Comparative example 2
This example is the self-leveling material of example 4 described in chinese patent application CN 104692755A.
Example 5
Performance test experiments:
the oven dry strength of example 1, example 2, comparative example 1 and comparative example 2 was tested, respectively, and the results were 31.2MPa, 35.1MPa, 29.6MPa and 23.9MPa, respectively.
The self-leveling test pieces obtained in example 1, example 2, comparative example 1 and comparative example 2 were immersed in water, and the time for the surface to be corroded was measured, and the results were: no corrosion in 25 days, no corrosion in 30 days, corrosion in 25 hours and corrosion in 21 hours; the softening coefficients were 0.61, 0.75, 0.52 and 0.51, respectively.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1, water-resistant phosphogypsum self-leveling material, which is characterized by comprising the following components in percentage by mass:
40-60% of phosphogypsum, 3-10% of cement, 8-12% of fly ash, 10-15% of quartz sand, 5-8% of pH regulator, 3-7% of excitant, 3-7% of mica powder, 2-5% of redispersible latex powder, 1-3% of water reducer, 0.5-1.5% of water-retaining agent, 0.3-0.8% of retarder, 0.2-0.8% of waterproof agent and 0.2-0.8% of defoaming agent, wherein the phosphogypsum is β type semi-hydrated gypsum;
the total is 100%.
2. The water-resistant phosphogypsum self-leveling material according to claim 1, which is characterized by consisting of the following components in percentage by mass:
50% of phosphogypsum, 5.2% of cement, 8% of fly ash, 12.3% of quartz sand, 6% of pH regulator, 5% of excitant, 5% of mica powder, 4% of redispersible latex powder, 2% of water reducing agent, 1% of water retaining agent, 0.5% of retarder, 0.5% of waterproof agent and 0.5% of defoaming agent, wherein the phosphogypsum is β type hemihydrate gypsum.
3. A water resistant phosphogypsum self-levelling material according to claim 1 or 2, which is characterised in that the pH adjusting agent is calcium hydroxide.
4. A water-resistant phosphogypsum self-leveling material according to claim 1 or 2, which is characterized in that the redispersible rubber powder is a copolymer rubber powder of vinyl acetate and ethylene.
5. A water resistant phosphogypsum self-levelling material according to claim 1 or 2, which is characterized in that the water retaining agent is hydroxypropyl methylcellulose.
6. A water-resistant phosphogypsum self-levelling material according to claim 1 or 2, which is characterised in that the water-proofing agent is silicone.
7. A water resistant phosphogypsum self-levelling material according to claim 1 or 2, which is characterised in that the antifoaming agent is polyether modified silicon.
8. The water-resistant phosphogypsum self-leveling material according to claim 1 or 2, which is characterized in that the water reducing agent is a polycarboxylic acid water reducing agent.
9. A water resistant phosphogypsum self-levelling material according to claim 1 or 2, which is characterised in that the retarder is citric acid.
10. A water resistant phosphogypsum self-levelling material according to claim 1 or 2, which is characterised in that the activator is potassium carbonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810010460.0A CN108117361B (en) | 2018-01-05 | 2018-01-05 | Water-resistant phosphogypsum self-leveling material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810010460.0A CN108117361B (en) | 2018-01-05 | 2018-01-05 | Water-resistant phosphogypsum self-leveling material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108117361A CN108117361A (en) | 2018-06-05 |
| CN108117361B true CN108117361B (en) | 2020-01-31 |
Family
ID=62232722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810010460.0A Active CN108117361B (en) | 2018-01-05 | 2018-01-05 | Water-resistant phosphogypsum self-leveling material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108117361B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109734404A (en) * | 2019-03-19 | 2019-05-10 | 成都上筑建材有限公司 | High-strength waterproof gypsum base kerbstone |
| CN114907084A (en) * | 2021-02-07 | 2022-08-16 | 广东山众建筑科技有限公司 | Phosphogypsum-based building material and preparation method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102643065B (en) * | 2011-02-17 | 2013-07-10 | 徐迅 | Phosphogypsum self-leveling material |
| CN104692755B (en) * | 2015-02-02 | 2017-01-04 | 武汉理工大学 | A kind of ardealite based self-leveling material and preparation method thereof |
| CN105645898A (en) * | 2015-12-30 | 2016-06-08 | 上海每天节能环保科技股份有限公司 | Modified gypsum-based self-leveling mortar and preparation and application thereof |
-
2018
- 2018-01-05 CN CN201810010460.0A patent/CN108117361B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN108117361A (en) | 2018-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102173705B (en) | Composite sulphoaluminate cement-based self-leveling material and preparation method thereof | |
| CN110294611B (en) | Normal-temperature weak-alkali geopolymer excited cement soil and preparation process thereof | |
| CN104291757B (en) | A kind of non-evaporating pressure PHC pile tube being applicable under corrosive environment | |
| CN109584973B (en) | Design and preparation method of building waste powder-based ecological type ultrahigh-performance concrete | |
| CN104774293B (en) | A kind of anti-chamotte mould polycarboxylate water-reducer and preparation method thereof | |
| US9458060B2 (en) | Grinding aid for cement clinker based on polycarboxylate ethers and/or lignosulfonates | |
| CN107942041B (en) | Design method for mixing proportion of anti-decomposition erosion hydraulic concrete | |
| CN111908823B (en) | Hydroxypiperazine concrete gel reducing agent and preparation method thereof | |
| CN108117361B (en) | Water-resistant phosphogypsum self-leveling material | |
| CN109942270A (en) | A kind of ocean engineering polymer mending mortar | |
| CN107867806B (en) | Sludge incineration ash-based geopolymer and preparation method thereof | |
| CN112759723A (en) | Cement grinding aid and preparation method thereof | |
| CN115417632A (en) | Preparation method of phosphogypsum precast concrete | |
| CN109021179B (en) | Phosphonic acid-based polymer, preparation method thereof and phosphate mother liquor | |
| CN112159196B (en) | High-strength waterproof plastering gypsum mortar and preparation method thereof | |
| Li et al. | In-depth analysis of macro-properties and micro-mechanism of eco-friendly geopolymer based on typical circulating fluidized bed fly ash | |
| CN115594450B (en) | Geopolymer ceramsite lightweight concrete and preparation method thereof | |
| TRAJNOST | The effect of silica fume additions on the durability of Portland cement mortars exposed to magnesium sulfate attack | |
| CN104370506B (en) | A kind of concrete for improving workability and preparation method thereof | |
| CN114920475B (en) | Titanium gypsum mineral powder-based composite cementing material | |
| CN107941645B (en) | Method for measuring reaction degree of each substance in fly ash, silica fume and cement three-phase composite system | |
| CN113912343B (en) | Building plastering mortar suitable for robot and preparation method thereof | |
| CN115321870A (en) | Special additive for lightweight concrete and preparation method thereof | |
| CN107759122A (en) | A kind of concrete subtracts jelly | |
| CN109705283B (en) | Retarding polycarboxylate superplasticizer and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |