CN111995346A - Anti-cracking formaldehyde-free benzene-free gypsum - Google Patents
Anti-cracking formaldehyde-free benzene-free gypsum Download PDFInfo
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- CN111995346A CN111995346A CN202010919417.3A CN202010919417A CN111995346A CN 111995346 A CN111995346 A CN 111995346A CN 202010919417 A CN202010919417 A CN 202010919417A CN 111995346 A CN111995346 A CN 111995346A
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- gypsum
- free
- formaldehyde
- benzene
- cracking
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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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
- E04F13/00—Coverings or linings, e.g. for walls or ceilings
- E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
- E04F13/04—Bases for plaster
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00025—Aspects relating to the protection of the health, e.g. materials containing special additives to afford skin protection
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Ceramic Engineering (AREA)
- Civil Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses anti-cracking formaldehyde-free benzene-free gypsum which is prepared from the following raw materials in parts by weight: 450kg-500kg of gypsum, 500kg-550kg of fine sand, 2.5kg-3kg of MC, 0.8kg-1.8kg of retarder, 5kg-8kg of sticky rice glue powder and 0.5kg-0.8kg of starch ether; the gypsum is formaldehyde-free, benzene-free, VOC-free and odorless, has the advantages of early strength, quick hardening, light weight, heat preservation, heat insulation, fire resistance and sound insulation of building gypsum, has the characteristics of good construction workability, high bonding strength, difficulty in hollowing and cracking, has a breathing function, can adjust air humidity, improves the room environment, and is healthy, green and environment-friendly.
Description
Technical Field
The invention relates to anti-cracking formaldehyde-free benzene-free gypsum.
Background
The main chemical component of gypsum is calcium sulfate (CaSO4) hydrate, which is monoclinic mineral. Gypsum is a widely used industrial and building material, and its product has a microporous structure and a dewatering property by heating, so that it has excellent sound-insulating, heat-insulating and fire-resisting properties, and can be used as cement retarder, gypsum building product, model making, medical food additive, sulfuric acid production, paper filler, paint filler, etc. The plastering gypsum is a novel indoor wall surface bottom layer plastering material formed by mixing gypsum, washed sand, calcium carbonate and various organic additives, namely 'leveling mortar', and is suitable for plastering and leveling concrete, aerated concrete and brick-concrete mortar wall surface base layers, and the content of harmful substances such as formaldehyde, benzene, VOC and the like of the existing common gypsum, which seriously affect the health of the human body, exceeds the standard, so that the decoration wall surface is seriously dyed, and the health of the human body is influenced.
Therefore, it is necessary to find a gypsum which is free of formaldehyde, benzene, VOC, odor, health and environmental protection.
Disclosure of Invention
In view of the above, the invention aims to provide the gypsum which is free of formaldehyde, benzene, VOC, odor and environmental protection.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 450kg-500kg of gypsum, 500kg-550kg of fine sand, 2.5kg-3kg of MC, 0.8kg-1.8kg of retarder, 5kg-8kg of sticky rice glue powder and 0.5kg-0.8kg of starch ether.
Further, the anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 500kg of gypsum, 500kg of fine sand, 2.5kg of MC, 0.8kg of retarder, 5kg of sticky rice glue powder and 0.5kg of starch ether.
Further, the anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 450kg of gypsum, 550kg of fine sand, 3kg of MC, 1.8kg of retarder, 8kg of sticky rice glue powder and 0.8kg of starch ether.
Further, the anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 480kg of gypsum, 530kg of fine sand, 2.8kg of MC, 1.4kg of retarder, 6.5kg of sticky rice glue powder and 0.65kg of starch ether.
The invention aims to solve another technical problem and provides a preparation method of the anti-cracking formaldehyde-free benzene-free gypsum, which comprises the following steps:
1) putting 450kg-500kg of gypsum and 500kg-550kg of fine sand into a stirrer, starting the stirrer, and stirring at the speed of 30-40r/min for 10-15min to uniformly mix the gypsum and the fine sand;
2) sequentially adding 5kg-8kg of glutinous rice glue powder and 0.5kg-0.8kg of starch ether in the step 1), starting a stirrer, and continuously stirring at the speed of 30-40r/min for 10-15min to uniformly mix materials in the stirrer;
3) sequentially adding 2.5kg-3kg of MC and 0.8kg-1.8kg of retarder in the step 2), starting the stirrer again, adjusting the speed of the stirrer to be 20-30r/min, and continuously stirring for 20-30min to obtain a gypsum material for later use;
4) bagging the gypsum materials obtained in the step 3), wherein the net weight of each bag of gypsum materials is 19.5 kg.
5) And (3) storing the gypsum bagged in the step 4) in a cool and dry place, and preventing moisture and sun.
Another technical problem to be solved by the present invention is to provide a gypsum plastering process, which comprises the following steps:
1) base layer treatment: the base layer is solid and free of floating ash and dirt, the water content is lower than 5%, the base layer is forbidden to be mixed with other substances for use, and the initial setting time is 75-90 minutes;
2) stirring, namely adding water into the gypsum, wherein the water addition amount is 30 percent, the actual water addition amount is based on the construction consistency, standing for 10 minutes after uniformly stirring, and stirring again for use;
3) plastering and re-leveling: the thickness of each plastering is controlled below 5mm, and if the leveling thickness is large, the plastering should be leveled for several times.
The plastering gypsum is a novel indoor wall surface bottom layer plastering material formed by mixing gypsum, washed sand, calcium carbonate and various organic additives, namely 'leveling mortar', is suitable for plastering and leveling concrete, aerated concrete and brick-concrete mortar wall surface base layers, has the advantages of early strength, quick hardening, light weight, heat preservation, heat insulation, fire resistance, sound insulation and the like of building gypsum, has the characteristics of good construction workability, high bonding strength, difficult hollowing and difficult cracking, has a breathing function, can adjust air humidity and improve the room environment, and is a green and environment-friendly product.
The technical effects of the invention are mainly reflected in the following aspects: the building gypsum plaster is prepared by uniformly mixing gypsum, fine sand, MC, retarder, sticky rice glue powder and starch ether through a stirrer, has the advantages of simple preparation method, no formaldehyde, no benzene, no VOC and no odor, has the advantages of early strength, quick hardening, light weight, heat preservation, heat insulation, fire resistance and sound insulation of the building gypsum, has the characteristics of good construction workability, high bonding strength, difficult hollowness and cracking, has a breathing function, can adjust air humidity and improve the room environment, is a healthy green environment-friendly product, and has wide market prospect.
Detailed Description
Example 1
The anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 500kg of gypsum, 500kg of fine sand, 2.5kg of MC, 0.8kg of retarder, 5kg of sticky rice glue powder and 0.5kg of starch ether.
A preparation method of the anti-crack formaldehyde-free benzene-free gypsum comprises the following steps:
1) putting 500kg of gypsum and 500kg of fine sand into a stirrer, starting the stirrer, and stirring at the speed of 40r/min for 15min to uniformly mix the gypsum and the fine sand;
2) sequentially adding 5kg of glutinous rice glue powder and 0.5kg of starch ether in the step 1), starting the stirrer, and continuously stirring at the speed of 30r/min for 10min to uniformly mix the materials in the stirrer;
3) sequentially adding 2.5kg of MC and 0.8kg of retarder in the step 2), starting the stirrer again, adjusting the speed of the stirrer to be 20r/min, and continuously stirring for 20min to obtain a gypsum material for later use;
4) bagging the gypsum materials obtained in the step 3), wherein the net weight of each bag of gypsum materials is 19.5 kg.
5) And (3) storing the gypsum bagged in the step 4) in a cool and dry place, and preventing moisture and sun.
Example 2
The anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 450kg of gypsum, 550kg of fine sand, 3kg of MC, 1.8kg of retarder, 8kg of sticky rice glue powder and 0.8kg of starch ether.
A preparation method of the anti-crack formaldehyde-free benzene-free gypsum comprises the following steps:
1) putting 450kg of gypsum and 550kg of fine sand into a stirrer, starting the stirrer, and stirring at the speed of 30r/min for 10min to uniformly mix the gypsum and the fine sand;
2) sequentially adding 8kg of glutinous rice glue powder and 0.8kg of starch ether in the step 1), starting the stirrer, and continuously stirring at the speed of 40r/min for 15min to uniformly mix the materials in the stirrer;
3) sequentially adding 3kg of MC and 1.8kg of retarder in the step 2), starting the stirrer again, adjusting the speed of the stirrer to be 30r/min, and continuously stirring for 30min to obtain a gypsum material for later use;
4) bagging the gypsum materials obtained in the step 3), wherein the net weight of each bag of gypsum materials is 19.5 kg.
5) And (3) storing the gypsum bagged in the step 4) in a cool and dry place, and preventing moisture and sun.
Example 3
The anti-cracking formaldehyde-free benzene-free gypsum is prepared from the following raw materials in parts by weight: 480kg of gypsum, 530kg of fine sand, 2.8kg of MC, 1.4kg of retarder, 6.5kg of sticky rice glue powder and 0.65kg of starch ether.
A preparation method of the anti-crack formaldehyde-free benzene-free gypsum comprises the following steps:
1) putting 480kg of gypsum and 530kg of fine sand into a stirrer, starting the stirrer, and stirring at the speed of 35r/min for 12min to uniformly mix the gypsum and the fine sand;
2) sequentially adding 6.5kg of glutinous rice glue powder and 0.65kg of starch ether in the step 1), starting a stirrer, and continuously stirring at the speed of 35r/min for 13min to uniformly mix materials in the stirrer;
3) sequentially adding 2.8kg of MC and 1.4kg of retarder in the step 2), starting the stirrer again, adjusting the speed of the stirrer to be 25r/min, and continuously stirring for 25min to obtain a gypsum material for later use;
4) bagging the gypsum materials obtained in the step 3), wherein the net weight of each bag of gypsum materials is 19.5 kg.
5) And (3) storing the gypsum bagged in the step 4) in a cool and dry place, and preventing moisture and sun.
Examples of the experiments
Subject: gypsum obtained in example 1 of the present application.
The experimental method comprises the following steps: according to the standard of GB 18582-.
Limit standard:
| detecting items | Limit value |
| Content of Volatile Organic Compounds (VOC) g/kg | ≤15 |
| Total of benzene, toluene, ethylbenzene and xylene, mg/kg | ≤300 |
| Free formaldehyde mg/kg | ≤100 |
The performance indexes of example 1 of the present invention are shown in the following table:
| detecting items | The result of the detection | Singleton decision |
| Content of Volatile Organic Compounds (VOC) g/kg | 12 | Conform to |
| Total of benzene, toluene, ethylbenzene and xylene, mg/kg | Not detected (< 50) | Conform to |
| Free formaldehyde mg/kg | Not detected (< 5) | Conform to |
The data in the table show that the gypsum of the invention has no formaldehyde, no benzene, no VOC, no odor, health and environmental protection.
The technical effects of the invention are mainly reflected in the following aspects: the building gypsum plaster is prepared by uniformly mixing gypsum, fine sand, MC, retarder, sticky rice glue powder and starch ether through a stirrer, has the advantages of simple preparation method, no formaldehyde, no benzene, no VOC and no odor, has the advantages of early strength, quick hardening, light weight, heat preservation, heat insulation, fire resistance and sound insulation of the building gypsum, has the characteristics of good construction workability, high bonding strength, difficult hollowness and cracking, has a breathing function, can adjust air humidity and improve the room environment, is a healthy green environment-friendly product, and has wide market prospect.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (4)
1. The anti-cracking formaldehyde-free benzene-free gypsum is characterized in that: the feed is prepared from the following raw materials in parts by weight: 450kg-500kg of gypsum, 500kg-550kg of fine sand, 2.5kg-3kg of MC, 0.8kg-1.8kg of retarder, 5kg-8kg of sticky rice glue powder and 0.5kg-0.8kg of starch ether.
2. The crack-resistant formaldehyde-free benzene-free gypsum according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 500kg of gypsum, 500kg of fine sand, 2.5kg of MC, 0.8kg of retarder, 5kg of sticky rice glue powder and 0.5kg of starch ether.
3. The crack-resistant formaldehyde-free benzene-free gypsum according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 450kg of gypsum, 550kg of fine sand, 3kg of MC, 1.8kg of retarder, 8kg of sticky rice glue powder and 0.8kg of starch ether.
4. The crack-resistant formaldehyde-free benzene-free gypsum according to claim 1, wherein: the feed is prepared from the following raw materials in parts by weight: 480kg of gypsum, 530kg of fine sand, 2.8kg of MC, 1.4kg of retarder, 6.5kg of sticky rice glue powder and 0.65kg of starch ether.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010919417.3A CN111995346A (en) | 2020-09-04 | 2020-09-04 | Anti-cracking formaldehyde-free benzene-free gypsum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010919417.3A CN111995346A (en) | 2020-09-04 | 2020-09-04 | Anti-cracking formaldehyde-free benzene-free gypsum |
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| Publication Number | Publication Date |
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| CN111995346A true CN111995346A (en) | 2020-11-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010919417.3A Pending CN111995346A (en) | 2020-09-04 | 2020-09-04 | Anti-cracking formaldehyde-free benzene-free gypsum |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974470A (en) * | 2006-12-12 | 2007-06-06 | 利文海 | Wall scraping gypsum powder and its production process |
| CN101397415A (en) * | 2007-09-28 | 2009-04-01 | 尹国华 | Organic putty paste with vegetable activity |
| KR20100091588A (en) * | 2009-02-11 | 2010-08-19 | 박경서 | Yellow soil ready mixed concrete |
| CN109206108A (en) * | 2017-07-03 | 2019-01-15 | 长葛高固德新型建材科技有限公司 | A kind of scratch coat gypsum and preparation method thereof |
-
2020
- 2020-09-04 CN CN202010919417.3A patent/CN111995346A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1974470A (en) * | 2006-12-12 | 2007-06-06 | 利文海 | Wall scraping gypsum powder and its production process |
| CN101397415A (en) * | 2007-09-28 | 2009-04-01 | 尹国华 | Organic putty paste with vegetable activity |
| KR20100091588A (en) * | 2009-02-11 | 2010-08-19 | 박경서 | Yellow soil ready mixed concrete |
| CN109206108A (en) * | 2017-07-03 | 2019-01-15 | 长葛高固德新型建材科技有限公司 | A kind of scratch coat gypsum and preparation method thereof |
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Application publication date: 20201127 |