CN106116420A - A kind of preparation method of brushing gypsum - Google Patents

A kind of preparation method of brushing gypsum Download PDF

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Publication number
CN106116420A
CN106116420A CN201610469750.2A CN201610469750A CN106116420A CN 106116420 A CN106116420 A CN 106116420A CN 201610469750 A CN201610469750 A CN 201610469750A CN 106116420 A CN106116420 A CN 106116420A
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Prior art keywords
variation
strain
culture medium
mixture
thiobacillus
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CN201610469750.2A
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Chinese (zh)
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董晓
薛培龙
孟浩影
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董晓
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Priority to CN201610469750.2A priority Critical patent/CN106116420A/en
Publication of CN106116420A publication Critical patent/CN106116420A/en
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    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14Compositions 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
    • C04B28/16Compositions 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 containing anhydrite, e.g. Keene's cement
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B41/00After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/5076Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with masses bonded by inorganic cements
    • C04B41/5085Calcium sulfate cements
    • C04B41/5087Anhydrite
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The present invention relates to the preparation method of a kind of brushing gypsum, belong to construction material preparing technical field.First the present invention takes K2HPO4、MgSO4It is mixed with culture medium Deng material, again homemade variation thiobacillus thiooxidant is inoculated in culture medium and cultivates, obtain the thiobacillus thiooxidant strain that makes a variation, it is carried out Hybrid Heating with homemade dead plaster and sulfate hemihydrate calcium compound, and it is simultaneously introduced the materials such as sodium carboxymethyl cellulose, it is prepared into mixture, finally by mixture and the material Hybrid Heating such as sand, kieselguhr stirring of carefully making pottery, i.e. can get brushing gypsum.Brushing gypsum water retention prepared by the present invention is 94~96%, will not be not enough due to aquation, produces the phenomenon of drying shrinkage slight crack;Comprcssive strength is high, and comprcssive strength is 6.5~7.0MPa;Preparation process is simple, required low cost.

Description

A kind of preparation method of brushing gypsum
Technical field
The present invention relates to the preparation method of a kind of brushing gypsum, belong to construction material preparing technical field.
Background technology
Brushing gypsum is that calcium sulphate dihydrate or excites, its product half-H 2 O calcium sulphate through calcining through dehydration or dead plaster Individually or additive is mixed after both mixing, it is possible to add the plastering material that filler is made with II type dead plaster.Surface layer powder Brush Gypsum Fibrosum is for bottom layer brushing gypsum or other suprabasil last layer of Gypsum Fibrosum plastering material, is typically free of and gathers materials, has Higher intensity.Common brushing gypsum is all with plaster of Paris as raw material, and substitutes with Desulphurization-desulfurated plaster compound and build Build Gypsum Fibrosum and can reduce the utilization of gypsum resource.
Existing brushing gypsum is mainly formed through suitable temperature calcination by dihydrate gypsum, but in calcination process, dihydrate gypsum is subject to Heat is uneven, brushing gypsum performance will be produced large effect.Owing in discarded Gypsum Fibrosum mud, sodium chloride content is higher, impact system The quality of standby anhydrous gypsum, and anhydrous gypsum poor activity, hydration and hardening are slow.And produce brushing gypsum with semi-hydrated gypsum, Owing to setting time is too fast, could use so retarder must be mixed.This not only increases cost, and reduces the strong of goods Degree.Additionally retarder volume is uneven, there is also be not condense the fastest, it is simply that the slowest.Supplier and work order often occur The contradiction of position.The most useful natural anhydrite produces brushing gypsum, and setting time is not problem, but there will be early hydration not Foot, produces desciccation crack;Later stage such as runs into water, and anhydrite continues aquation and produces volumetric expansion.
Summary of the invention
The technical problem to be solved: for the brushing gypsum with the natural gypsum as main material production, can go out Existing early hydration is not enough, produces drying shrinkage slight crack and the later stage meets water, the problem of volumetric expansion, it is provided that first one takes K2HPO4、 MgSO4It is mixed with culture medium Deng material, more homemade variation thiobacillus thiooxidant is inoculated in culture medium cultivates, obtain Variation thiobacillus thiooxidant strain, carries out Hybrid Heating by itself and homemade dead plaster and sulfate hemihydrate calcium compound, and same Time add the material such as sodium carboxymethyl cellulose, be prepared into mixture, finally mixture mixed with the material such as sand, kieselguhr of carefully making pottery Heated and stirred, the method that i.e. can get brushing gypsum.Brushing gypsum water retention prepared by the present invention is 94~96%, will not be due to Aquation is not enough, produces the phenomenon of drying shrinkage slight crack.
For solving above-mentioned technical problem, the present invention uses the technical scheme as described below to be:
(1) 0.3~0.5gK is weighed2HPO4, 0.5~0.8gMgSO4, 0.3~0.5g(NH4)2SO4Join in culture dish, simultaneously In culture dish, add 500~600mL deionized waters, stir 10~20min, make culture medium, cultivate strain;
(2) choose 3~5 strain thiobacillus thiooxidants, be that 280nm ultraviolet irradiates 3~4h with wavelength, obtain the thiobacillus thiooxidant that makes a variation, The thiobacillus thiooxidant that made a variation by gained is seeded in culture medium, then culture medium is placed in shaking table, at 38~40 DEG C, and shaken cultivation 24~26h, filter after having cultivated, obtain the thiobacillus thiooxidant strain that makes a variation, standby;
(3) weigh 10~20g admant ashes, pulverize with pulverizer, sieve, obtain the 100~200 hard lime powders of mesh, by admant ash Powder joins in flask, is placed in oil bath pan by flask, and control temperature, at 120~140 DEG C, stirs 1~2h, obtains anhydrous sulfur Acid calcium and sulfate hemihydrate calcium compound;
(4) variation thiobacillus thiooxidant strain standby in above-mentioned steps (2) is added above-mentioned dead plaster and half-H 2 O calcium sulphate In mixture, control temperature, at 45~55 DEG C, stirs 24~26h, then is sequentially added into 0.3~0.5g carboxymethyl cellulose wherein Sodium, 0.3~0.5g modified starch, insulated and stirred 20~30min, obtain mixture;
(5) in said mixture, it is sequentially added into 5~8g carefully make pottery sand, 5~8g kieselguhr, 1~2g cement, protects at 45~55 DEG C Temperature stirring 20~30min, then raises temperature to 80~90 DEG C, stirs 30~40min, obtains a kind of brushing gypsum.
The application process of the present invention: first the concrete wall that need to coat is processed, cleaning floating ash dirt, and for The irregular position of convex-concave surface, carry out picking chipping whole after, body of wall is watered moistening, it is deep that irrigation amount penetrates into body of wall with moisture Degree 8~10mm is advisable, after end of watering, by the datum line of bullet own on wall, hang at angle, doorway, buttress, metope etc. vertically respectively, Set side, cake of plastering, then by above-mentioned preparation with sandstone 1:2 in mass ratio~4, after being uniformly mixed, be applied in body of wall substrate On, thickness is 5~7mm, and after striking off up and down with darby, then float coat brushing gypsum, and smearing thickness is 1~2mm, stand 45~ After 50min, press polish, carry out the most respectively smearing cement mortar skirting board and smearing door and window saliva cement mortar corner protector, can complete mixed The brushing of solidifying cob wall body.After testing, the water retention of its concrete wall is 94~96%, and comprcssive strength is 6.5~7.0MPa, and Do not have desciccation crack and the phenomenon of body of wall volumetric expansion.
The present invention is compared with additive method, and Advantageous Effects is:
(1) the brushing gypsum water retention that prepared by the present invention is 94~96%, will not be not enough due to aquation, produces showing of drying shrinkage slight crack As;
(2) the brushing gypsum comprcssive strength that prepared by the present invention is high, and comprcssive strength is 6.5~7.0MPa;
(3) preparation process of the present invention is simple, required low cost.
Detailed description of the invention
First 0.3~0.5gK is weighed2HPO4, 0.5~0.8gMgSO4, 0.3~0.5g(NH4)2SO4Join culture dish In, in culture dish, add 500~600mL deionized waters simultaneously, stir 10~20min, make culture medium, cultivate strain;So After choose 3~5 strain thiobacillus thiooxidants, with wavelength be 280nm ultraviolet irradiate 3~4h, obtain make a variation thiobacillus thiooxidant, by gained Variation thiobacillus thiooxidant is seeded in culture medium, then culture medium is placed in shaking table, at 38~40 DEG C, shaken cultivation 24~ 26h, filters after having cultivated, and obtains the thiobacillus thiooxidant strain that makes a variation, standby;Weigh 10~20g admant ashes again, use pulverizer powder Broken, sieve, obtain the 100~200 hard lime powders of mesh, hard lime powder is joined in flask, flask is placed in oil bath pan, Control temperature, at 120~140 DEG C, stirs 1~2h, obtains dead plaster and sulfate hemihydrate calcium compound;By above-mentioned standby Variation thiobacillus thiooxidant strain adds in above-mentioned dead plaster and sulfate hemihydrate calcium compound, controls temperature at 45~55 DEG C, Stirring 24~26h, then it is sequentially added into 0.3~0.5g sodium carboxymethyl cellulose, 0.3~0.5g modified starch wherein, insulation is stirred Mix 20~30min, obtain mixture;Last be sequentially added in said mixture 5~8g carefully make pottery sand, 5~8g kieselguhr, 1~ 2g cement, insulated and stirred 20~30min at 45~55 DEG C, then raise temperature to 80~90 DEG C, stir 30~40min, obtain a kind of Brushing gypsum.
Example 1
First 0.3gK is weighed2HPO4、0.5gMgSO4, 0.3g(NH4)2SO4Join in culture dish, add in culture dish simultaneously 500mL deionized water, stirs 10min, makes culture medium, cultivates strain;Then choose 3 strain thiobacillus thiooxidants, with wavelength be 280nm ultraviolet irradiates 3h, obtains the thiobacillus thiooxidant that makes a variation, and the thiobacillus thiooxidant that made a variation by gained is seeded in culture medium, then will Culture medium is placed in shaking table, at 38 DEG C, and shaken cultivation 24h, filter after having cultivated, obtain the thiobacillus thiooxidant strain that makes a variation, Standby;Weigh 10g admant ash again, pulverize with pulverizer, sieve, obtain the 100 hard lime powders of mesh, hard lime powder is joined In flask, being placed in oil bath pan by flask, control temperature, at 120 DEG C, stirs 1h, obtains dead plaster and half-H 2 O calcium sulphate mixes Compound;Above-mentioned standby variation thiobacillus thiooxidant strain is added in above-mentioned dead plaster and sulfate hemihydrate calcium compound, control Temperature processed, at 45 DEG C, stirs 24h, then is sequentially added into 0.3g sodium carboxymethyl cellulose, 0.3g modified starch, insulated and stirred wherein 20min, obtains mixture;The last 5g that is sequentially added in said mixture carefully makes pottery sand, 5g kieselguhr, 1g cement, at 45 DEG C Insulated and stirred 20min, then raises temperature to 80 DEG C, stirs 30min, obtains a kind of brushing gypsum.
First the concrete wall that need to coat is processed, cleaning floating ash dirt, and irregular for convex-concave surface Position, carry out picking chipping whole after, body of wall is watered moistening, irrigation amount penetrates into body of wall degree of depth 10mm with moisture and is advisable, to be poured After water terminates, by the datum line of bullet own on wall, hang at angle, doorway, buttress, metope etc. vertically respectively, set side, cake of plastering, then by upper State preparation with sandstone 1:4 in mass ratio, after being uniformly mixed, be applied in body of wall substrate, thickness is 5~7mm, and with scraping After thick stick strikes off up and down, then float coat brushing gypsum, smearing thickness is 2mm, after standing 50min, and press polish, carry out the most respectively smearing water Cement mortar skirting board and smear door and window saliva cement mortar corner protector, can complete the brushing to concrete wall.After testing, its concrete The water retention of body of wall is 96%, and comprcssive strength is 7.0MPa, and does not haves desciccation crack and the phenomenon of body of wall volumetric expansion.
Example 2
First 0.4gK is weighed2HPO4、0.7gMgSO4, 0.4g(NH4)2SO4Join in culture dish, add in culture dish simultaneously 550mL deionized water, stirs 15min, makes culture medium, cultivates strain;Then choose 4 strain thiobacillus thiooxidants, with wavelength be 280nm ultraviolet irradiates 4h, obtains the thiobacillus thiooxidant that makes a variation, and the thiobacillus thiooxidant that made a variation by gained is seeded in culture medium, then will Culture medium is placed in shaking table, at 39 DEG C, and shaken cultivation 25h, filter after having cultivated, obtain the thiobacillus thiooxidant strain that makes a variation, Standby;Weigh 15g admant ash again, pulverize with pulverizer, sieve, obtain the 150 hard lime powders of mesh, hard lime powder is joined In flask, being placed in oil bath pan by flask, control temperature, at 130 DEG C, stirs 2h, obtains dead plaster and half-H 2 O calcium sulphate mixes Compound;Above-mentioned standby variation thiobacillus thiooxidant strain is added in above-mentioned dead plaster and sulfate hemihydrate calcium compound, control Temperature processed, at 50 DEG C, stirs 25h, then is sequentially added into 0.4g sodium carboxymethyl cellulose, 0.4g modified starch, insulated and stirred wherein 25min, obtains mixture;The last 6g that is sequentially added in said mixture carefully makes pottery sand, 6g kieselguhr, 2g cement, at 50 DEG C Insulated and stirred 25min, then raises temperature to 85 DEG C, stirs 35min, obtains a kind of brushing gypsum.
First the concrete wall that need to coat is processed, cleaning floating ash dirt, and irregular for convex-concave surface Position, carry out picking chipping whole after, body of wall is watered moistening, irrigation amount penetrates into body of wall degree of depth 8mm with moisture and is advisable, and waits to water After end, by the datum line of bullet own on wall, hang at angle, doorway, buttress, metope etc. vertically respectively, set side, cake of plastering, then by above-mentioned Preparation with sandstone 1:4 in mass ratio, after being uniformly mixed, be applied in body of wall substrate, thickness is 5mm, and with on darby Under strike off after, then float coat brushing gypsum, smearing thickness is 1mm, after standing 45min, press polish, carry out the most respectively smearing cement bonded sand Starch skirting board and smear door and window saliva cement mortar corner protector, the brushing to concrete wall can be completed.After testing, its concrete wall Water retention be 94%, comprcssive strength is 6.5MPa, and does not haves desciccation crack and the phenomenon of body of wall volumetric expansion.
Example 3
First 0.5gK is weighed2HPO4、0.8gMgSO4, 0.5g(NH4)2SO4Join in culture dish, add in culture dish simultaneously 600mL deionized water, stirs 20min, makes culture medium, cultivates strain;Then choose 5 strain thiobacillus thiooxidants, with wavelength be 280nm ultraviolet irradiates 4h, obtains the thiobacillus thiooxidant that makes a variation, and the thiobacillus thiooxidant that made a variation by gained is seeded in culture medium, then will Culture medium is placed in shaking table, at 40 DEG C, and shaken cultivation 26h, filter after having cultivated, obtain the thiobacillus thiooxidant strain that makes a variation, Standby;Weigh 20g admant ash again, pulverize with pulverizer, sieve, obtain the 200 hard lime powders of mesh, hard lime powder is joined In flask, being placed in oil bath pan by flask, control temperature, at 140 DEG C, stirs 2h, obtains dead plaster and half-H 2 O calcium sulphate mixes Compound;Above-mentioned standby variation thiobacillus thiooxidant strain is added in above-mentioned dead plaster and sulfate hemihydrate calcium compound, control Temperature processed, at 55 DEG C, stirs 26h, then is sequentially added into 0.5g sodium carboxymethyl cellulose, 0.5g modified starch, insulated and stirred wherein 30min, obtains mixture;The last 8g that is sequentially added in said mixture carefully makes pottery sand, 8g kieselguhr, 2g cement, at 55 DEG C Insulated and stirred 30min, then raises temperature to 90 DEG C, stirs 40min, obtains a kind of brushing gypsum.
First the concrete wall that need to coat is processed, cleaning floating ash dirt, and irregular for convex-concave surface Position, carry out picking chipping whole after, body of wall is watered moistening, irrigation amount penetrates into body of wall degree of depth 10mm with moisture and is advisable, to be poured After water terminates, by the datum line of bullet own on wall, hang at angle, doorway, buttress, metope etc. vertically respectively, set side, cake of plastering, then by upper State preparation with sandstone 1:3 in mass ratio, after being uniformly mixed, be applied in body of wall substrate, thickness is 6mm, and uses darby After striking off up and down, then float coat brushing gypsum, smearing thickness is 1mm, after standing 48min, and press polish, carry out the most respectively smearing cement Mortar skirting board and smear door and window saliva cement mortar corner protector, can complete the brushing to concrete wall.After testing, its concrete walls The water retention of body is 95%, and comprcssive strength is 6.7MPa, and does not haves desciccation crack and the phenomenon of body of wall volumetric expansion.

Claims (1)

1. the preparation method of a brushing gypsum, it is characterised in that concrete preparation process is:
(1) 0.3~0.5gK is weighed2HPO4, 0.5~0.8gMgSO4, 0.3~0.5g(NH4)2SO4Join in culture dish, simultaneously In culture dish, add 500~600mL deionized waters, stir 10~20min, make culture medium, cultivate strain;
(2) choose 3~5 strain thiobacillus thiooxidants, be that 280nm ultraviolet irradiates 3~4h with wavelength, obtain the thiobacillus thiooxidant that makes a variation, The thiobacillus thiooxidant that made a variation by gained is seeded in culture medium, then culture medium is placed in shaking table, at 38~40 DEG C, and shaken cultivation 24~26h, filter after having cultivated, obtain the thiobacillus thiooxidant strain that makes a variation, standby;
(3) weigh 10~20g admant ashes, pulverize with pulverizer, sieve, obtain the 100~200 hard lime powders of mesh, by admant ash Powder joins in flask, is placed in oil bath pan by flask, and control temperature, at 120~140 DEG C, stirs 1~2h, obtains anhydrous sulfur Acid calcium and sulfate hemihydrate calcium compound;
(4) variation thiobacillus thiooxidant strain standby in above-mentioned steps (2) is added above-mentioned dead plaster and half-H 2 O calcium sulphate In mixture, control temperature, at 45~55 DEG C, stirs 24~26h, then is sequentially added into 0.3~0.5g carboxymethyl cellulose wherein Sodium, 0.3~0.5g modified starch, insulated and stirred 20~30min, obtain mixture;
(5) in said mixture, it is sequentially added into 5~8g carefully make pottery sand, 5~8g kieselguhr, 1~2g cement, protects at 45~55 DEG C Temperature stirring 20~30min, then raises temperature to 80~90 DEG C, stirs 30~40min, obtains a kind of brushing gypsum.
CN201610469750.2A 2016-06-26 2016-06-26 A kind of preparation method of brushing gypsum Pending CN106116420A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1528702A (en) * 2003-09-30 2004-09-15 武汉理工大学 Whitewashing gypsum and preparing method thereof
CN101691292A (en) * 2009-09-30 2010-04-07 谢日清 Lightweight wall plaster
CN104072194A (en) * 2014-06-30 2014-10-01 孙红芳 Insulating layer plastering gypsum
CN104086148A (en) * 2014-06-30 2014-10-08 孙红芳 Bottom plastering gypsum powder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1528702A (en) * 2003-09-30 2004-09-15 武汉理工大学 Whitewashing gypsum and preparing method thereof
CN101691292A (en) * 2009-09-30 2010-04-07 谢日清 Lightweight wall plaster
CN104072194A (en) * 2014-06-30 2014-10-01 孙红芳 Insulating layer plastering gypsum
CN104086148A (en) * 2014-06-30 2014-10-08 孙红芳 Bottom plastering gypsum powder

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Application publication date: 20161116