CN100363295C - Gypsum mine plastering material and preparation process thereof - Google Patents

Gypsum mine plastering material and preparation process thereof Download PDF

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Publication number
CN100363295C
CN100363295C CNB2005101205141A CN200510120514A CN100363295C CN 100363295 C CN100363295 C CN 100363295C CN B2005101205141 A CNB2005101205141 A CN B2005101205141A CN 200510120514 A CN200510120514 A CN 200510120514A CN 100363295 C CN100363295 C CN 100363295C
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powder
gypsum mine
powders
gypsum
slag powders
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CN1792985A (en
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姜洪义
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Wuhan University of Technology WUT
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Wuhan University of Technology WUT
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    • 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

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Abstract

The present invention relates to a building plastering material and a preparation method thereof. A gypsum tailing plastering material is characterized in that the gypsum tailing plastering material is mainly formed by mixing gypsum tailing powders, slag powders, activators, early strength agents, redispersible latex powders and water retention agents; the quality percentages of all raw materials of the gypsum tailing powders and the slag powders are from 50 to 70 % of the gypsum tailing powders and from 30 to 50 % of the slag powders; the activators and the early strengthening agents are additionally added; the activators are from 0.8 to 1.2% of the quality of the gypsum tailing powders and the slag powders; the early strengthening agents are from 1.3 to 1.7% of the quality of the gypsum tailing powders and the slag powders; the redispersible latex powders and the water retention agents are additionally added; the redispersible latex powders are from 1 to 3% of the quality of the gypsum tailing powders and the slag powders; the water retention agents are from 0.8 to 1.5% of the quality of the gypsum tailing powders and the slag powders; the gypsum tailing powders are fine powders which are formed by that gypsum tailings are broken into particles with particle diameters smaller than 10mm and then fine ground into the fine powders with 15% of screen residue weight of a square hole screen of 0.08mm. The present invention has the characteristic of low cost, and has the advantage of simple preparation method.

Description

Gypsum mine plastering material and preparation method thereof
Technical field
The invention belongs to the New Building Materials technical field, be specifically related to a kind of method of utilizing gypsum mine manufacturing building plastering material.
Background technology
Gypsum mine is meant that dihydrate gypsum content is lower than 50% gypsum ore, can not be used to calcine the plaster of Paris owing to contain various impurity, and become a kind of trade waste.At present, all exist in a large number in each big Gypsum Mine, both the land occupation influence was produced, again contaminate environment.Therefore, the regeneration of gypsum mine has caused people's attention.
Research was once carried out to the regeneration of gypsum mine at the initial stage eighties in yingcheng gypsum ore deposit, Hubei Province.The method of its preparation is: gypsum mine makes dihydrate gypsum be transformed into dehydrated gyp-through high temperature (greater than 800 ℃) calcining, again admixture cement and other admixtures.But because goods poor water resistance and the scum phenomenon occurs fails to enter practical stage.By research, its reason of initial analysis is: (1) calcining temperature is too high, makes the initial water-filling of mineralization body space too little, causes the hardenite structural stability relatively poor; (2) feldspar is because of high-temperature calcination, and crystalline structure is destroyed, and makes Na +, K +Ion obtains activation, easy and SO 4 2-In conjunction with generating saltcake.So the calcined gypsum mine tailing prepares the test of gelling material and fails to succeed.
Summary of the invention
The object of the present invention is to provide a kind of gypsum mine plastering material and preparation method thereof cheaply.
To achieve these goals, technical scheme of the present invention is: gypsum mine plastering material, it is characterized in that it is mainly mixed by gypsum mine powder, slag powders, exciting agent, hardening accelerator, redispersable latex powder and water-holding agent raw material, the shared mass percent of each raw material of gypsum mine powder and slag powders is: gypsum mine powder 50-70, slag powders 30-50; External excitation agent and hardening accelerator, exciting agent account for the 0.8-1.2% of gypsum mine powder and slag powders quality, and hardening accelerator accounts for the 1.3-1.7% of gypsum mine powder and slag powders quality; Other adds redispersable latex powder and water-holding agent, and redispersable latex powder accounts for the 1-3% of gypsum mine powder and slag powders quality, and water-holding agent accounts for the 0.8-1.5% of gypsum mine powder and slag powders quality; The gypsum mine powder is for to be crushed to particle diameter less than 10mm with gypsum mine, and levigate then is 15% fine powder to 0.08mm square hole sieve screen over-size; Slag powders be with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 5000cm 2The fine powder of/g.
Described exciting agent is unslaked lime or slaked lime.Described hardening accelerator is levigated alum stone flour or alum powder.Described redispersable latex powder is the vinyl acetate between to for plastic series products.Described water-holding agent is a Vltra tears.
The preparation method of gypsum mine plastering material is characterized in that it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 5000cm 2/ g standby (only needing lower control limit to get final product); 3). by the shared mass percent of each raw material be: gypsum mine powder 50-70, slag powders 30-50 chooses gypsum mine powder and slag powders; Account for the 0.8-1.2% of gypsum mine powder and slag powders quality by exciting agent, the 1.3-1.7% that hardening accelerator accounts for gypsum mine powder and slag powders quality chooses exciting agent and hardening accelerator; Account for the 1-3% of gypsum mine powder and slag powders quality by redispersable latex powder, the 0.8-1.5% that water-holding agent accounts for gypsum mine powder and slag powders quality chooses redispersable latex powder and water-holding agent; Mix with mixer, get product (packing can be dispatched from the factory).
The water mix of the 25%-35% of admixture quality product of the present invention evenly can use during use.
The technological line that the present invention adopts is: gypsum mine is without calcining, direct levigate and a certain proportion of ground slag, other adds an amount of redispersable latex powder and water-holding agent mixes, and under the compound activator effect (external excitation agent and hardening accelerator), prepares novel water-resisting type building plastering material.
The hydration and hardening process of plastering material is done description below: after agglutination material is met water, and Al 2(SO 4) 3, Ca (OH) 2Dissolving fast, dihydrate gypsum dissolves thereupon, and exist Ca in the liquid phase this moment 2+, SO 4 2-And OH -, part microcrystal such as C in the solid phase 2S, CA also begin aquation:
C 2S+mH＝CSH+(2-x)CH
CA+3CH+10H＝C 4AH 13
Simultaneously, the slag surface begins dissolving.The solvable silane agent of slag glass body micro free at first is dissolved in solution, simultaneously, and the OH in the vitreous surface absorbent solution -, when adsorptive capacity acquired a certain degree, Al-O, Si-O chain were opened in the vitreum reticulated structure, and following reaction takes place in the vitreous surface dissolving of disintegrating gradually as a result:
Al 2O 3+xCa(OH) 2+(m-x)H 2O＝xCaO·Al 2O 3·mH 2O
SiO 2+yCa(OH) 2+(n-y)H 2O＝xCaO·SiO 2·nH 2O
The drated calcium aluminate initial stage that generates is with C 3AH 6Form exists, and changes C in alkali lye into 4AH 13, with the gypsum reaction generation ettringite in the solution.
When aquation continues to proceed, vitreum successively dissolves, and hydrated product increases gradually, and ettringite is a support with slag glass body (also comprising other particle), is the radiation growth.The ettringite crystal overlap joint intersected with each other that forms forms the space reticulated structure around particle.Simultaneously, hydrated calcium silicate is also in a large amount of formation, and hydrated calcium silicate is filled between the crystallization net of ettringite, plays bonding effect, and dispersive crystallization net is linked to be an integral body.Hydrated calcium silicate and ettringite interweave chain mutually, constitute the early stage structure of hardenite jointly.
Agglutination material hardenite final product is hydrated calcium silicate gel and ettringite, also has a large amount of gypsum, anhydrite, quartz, feldspar and unhydrated glass microballon.Wherein, the CSH gel plays a major role to the formation of agglutination material intensity, and it is bonded together ettringite crystalline texture net, and is filled in hole, particle is bonded together make agglutination material form a closely knit high-strength hardenite.
The present invention can utilize gypsum mine in a large number, and production technique is simple, production cost is low.Prepared plastering material is moderate time of coagulation, the intensity height, and water-tolerant can be widely used in the interior wall face of various worker China Democratic National Construction Association engineering.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
In order to understand the present invention better, further illustrate content of the present invention below in conjunction with embodiment, but content of the present invention not only is confined to the following examples.
Embodiment 1:
As shown in Figure 1, the preparation method of gypsum mine plastering material, it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: the water-granulated slag oven dry of iron and steel enterprise's discharging is levigate to specific surface area 5001-8000cm 2/ g is standby; 3). with mass percent is 60 gypsum mine powder, and mass percent is 40 ground slag powder; Mix 1.5% hardening accelerator (calcined alunite of 1% exciting agent (unslaked lime) of shared gypsum mine powder and slag powders quality and shared gypsum mine powder and slag powders quality outward, pulverize), other adds 1.0% water-holding agent (being specially Vltra tears) of 2% redispersable latex powder (vinyl acetate between to for plastic class) of shared gypsum mine powder and slag powders quality and shared gypsum mine powder and slag powders quality, mix with mixer, packing can be dispatched from the factory.The water mix of the 25%-35% of admixture quality product of the present invention evenly can use during use.
Embodiment 2:
The preparation method of gypsum mine plastering material, it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with water-granulated slag dry levigate to specific surface area greater than 5000cm 2/ g is standby; 3). with mass percent 70 gypsum mine powder, mass percent is 30 ground slag powder, mix 1.3% hardening accelerator (calcined alunite of 0.8% exciting agent (unslaked lime) of shared gypsum mine powder and slag powders quality and shared gypsum mine powder and slag powders quality outward, pulverize), other adds 0.8% water-holding agent (being specially Vltra tears) of 1% redispersable latex powder (vinyl acetate between to for plastic class) of shared gypsum mine powder and slag powders quality and shared gypsum mine powder and slag powders quality, mix with mixer, packing can be dispatched from the factory.The water mix of the 25%-35% of admixture quality product of the present invention evenly can use during use.
Embodiment 3:
The preparation method of gypsum mine plastering material, it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with phosphorus slag dry levigate to specific surface area greater than 5000cm 2/ g is standby; 3). with mass percent 70 gypsum mine powder, mass percent is 30 ground slag powder, mix 1.7% hardening accelerator (alum powder) of 1.2% exciting agent (slaked lime) of shared gypsum mine powder and slag powders quality and shared gypsum mine powder and slag powders quality outward, other adds 3% redispersable latex powder (vinyl acetate between to for plastic class of shared gypsum mine powder and slag powders quality, be the commercially available prod) and 1.5% water-holding agent (being specially Vltra tears) of shared gypsum mine powder and slag powders quality, mix with mixer, packing can be dispatched from the factory.The water mix of the 25%-35% of admixture quality product of the present invention evenly can use during use.
The bound value and the interval value of gypsum mine powder of the present invention, slag powders, exciting agent, hardening accelerator, redispersable latex powder, water-holding agent raw material can both be realized the present invention, just do not enumerate embodiment one by one at this.

Claims (6)

1. gypsum mine plastering material, it is characterized in that it is mainly mixed by gypsum mine powder, slag powders, exciting agent, hardening accelerator, redispersable latex powder and water-holding agent raw material, the shared mass percent of each raw material of gypsum mine powder and slag powders is: gypsum mine powder 50-70, slag powders 30-50; External excitation agent and hardening accelerator, exciting agent account for the 0.8-1.2% of gypsum mine powder and slag powders quality, and hardening accelerator accounts for the 1.3-1.7% of gypsum mine powder and slag powders quality; Other adds redispersable latex powder and water-holding agent, and redispersable latex powder accounts for the 1-3% of gypsum mine powder and slag powders quality, and water-holding agent accounts for the 0.8-1.5% of gypsum mine powder and slag powders quality; The gypsum mine powder is for to be crushed to particle diameter less than 10mm with gypsum mine, and levigate then is 15% fine powder to 0.08mm square hole sieve screen over-size; Slag powders be with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 5000cm 2The fine powder of/g.
2. gypsum mine plastering material according to claim 1 is characterized in that: described exciting agent is unslaked lime or slaked lime.
3. gypsum mine plastering material according to claim 1 is characterized in that: described hardening accelerator is levigated alum stone flour or alum powder.
4. gypsum mine plastering material according to claim 1 is characterized in that: described redispersable latex powder is the vinyl acetate between to for plastic series products.
5. gypsum mine plastering material according to claim 1 is characterized in that: described water-holding agent is a Vltra tears.
6. the preparation method of gypsum mine plastering material as claimed in claim 1, it is characterized in that it comprises the steps: 1). the preparation of gypsum mine powder: gypsum mine is crushed to particle diameter less than 10mm, and levigate then is that 15% fine powder is standby to 0.08mm square hole sieve screen over-size; 2). the preparation of slag powders: with the oven dry of water-granulated slag or phosphorus slag levigate to specific surface area greater than 5000cm 2/ g is standby; 3). by the shared mass percent of each raw material be: gypsum mine powder 50-70, slag powders 30-50 chooses gypsum mine powder and slag powders; Account for the 0.8-1.2% of gypsum mine powder and slag powders quality by exciting agent, the 1.3-1.7% that hardening accelerator accounts for gypsum mine powder and slag powders quality chooses exciting agent and hardening accelerator; Account for the 1-3% of gypsum mine powder and slag powders quality by redispersable latex powder, the 0.8-1.5% that water-holding agent accounts for gypsum mine powder and slag powders quality chooses redispersable latex powder and water-holding agent; Mix with mixer, get product.
CNB2005101205141A 2005-12-23 2005-12-23 Gypsum mine plastering material and preparation process thereof Expired - Fee Related CN100363295C (en)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101693384B (en) * 2009-09-29 2011-06-08 中博建设集团有限公司 Method of utilizing Pb-Zn tailings for preparing B05 grade self-energy-saving aerated concrete
CN105732089B (en) * 2016-03-10 2018-06-05 湖北工业大学 A kind of preparation method suitable for alkali phosphorus slag cast-in-place foamed concrete
CN109133695A (en) * 2018-10-12 2019-01-04 四川绵筑新材料有限公司 A kind of phosphorus building gypsum plastering mortar waterproof admixture and its application method

Citations (3)

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Publication number Priority date Publication date Assignee Title
CN1085195A (en) * 1993-09-02 1994-04-13 运城市地方国营水泥厂 Powdered coal ash-slag cement and manufacture method thereof
CN1370754A (en) * 2001-02-14 2002-09-25 胡新杰 Composite cementing material of slag and steel slag
CN1539778A (en) * 2003-04-25 2004-10-27 华新水泥股份有限公司 High performance cementitious materials

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1085195A (en) * 1993-09-02 1994-04-13 运城市地方国营水泥厂 Powdered coal ash-slag cement and manufacture method thereof
CN1370754A (en) * 2001-02-14 2002-09-25 胡新杰 Composite cementing material of slag and steel slag
CN1539778A (en) * 2003-04-25 2004-10-27 华新水泥股份有限公司 High performance cementitious materials

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
利用石膏尾矿生产新型墙体材料的研究. 姜洪义等.建筑砌块与砌块建筑，第2001年第3期. 2001 *
干粉砂浆的组分及其作用机理. 鞠丽艳等.新型建筑材料，第2002年第7期. 2002 *

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