CN105347714A - Modified phosphogypsum cement retarder - Google Patents
Modified phosphogypsum cement retarder Download PDFInfo
- Publication number
- CN105347714A CN105347714A CN201410411793.6A CN201410411793A CN105347714A CN 105347714 A CN105347714 A CN 105347714A CN 201410411793 A CN201410411793 A CN 201410411793A CN 105347714 A CN105347714 A CN 105347714A
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- China
- Prior art keywords
- phosphogypsum
- red mud
- cement
- weight part
- correcting agent
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Abstract
The present invention belongs to the technical field of retarders, and particularly to a modified phosphogypsum cement retarder, which comprises, by mass, 70-90% of phosphogypsum, and 10-30% of a modifer. According to the present invention, the red mud modified phosphogypsum is used as the retarder to solve the problems of soil occupation due to the emissions of phosphogypsum and red mud waste and environmental pollution, and the cement production enterprises can achieve economic benefits and social benefits, such that the red mud adopted as the phosphogypsum modifier is the applicable cement retarder, and can be the gypsum substitute.
Description
Technical field
The invention belongs to cement setting retarder technical field, be specifically related to a kind of modified ardealite setting retarder for cement.
Background technology
Retardant is a kind of admixture be of wide application in concrete admixture, proposes more and higher requirement with fundamental construction development to concrete performance.High-performance retardant has high dissemination to cement, can keep concrete bright degree of falling preferably.Infiltrating this kind of admixture can make concrete have high-performance, can obtain high-strength high-performance concrete.
Existing retardant main component mostly is high molecular polymer and inorganic salt.Phosphogypsum slag is the industrial residue produced in Wet-process Phosphoric Acid Production, often produces 1 ton of phosphoric acid and discharges phosphogypsum slag about 4 tons.The main component of phosphogypsum is CaSO
42H
2o, accounts for 65-96% and silicon compound, phosphoric acid salt, other vitriol, contains a small amount of hazardous compound in addition as fluorochemical, free acid.This type of waste residue, in China's utilization ratio only about 10%, stacks land occupation for a long time, and waste land resources, solvable objectionable impurities also can enter surface water pollution environment with precipitation.
Therefore, developing a kind of is that the retardant of raw material has great production practice and realistic meaning with phosphogypsum slag.
Summary of the invention
The object of the invention is to solve above-mentioned technical problem and a kind of modified ardealite setting retarder for cement is provided.
The present invention is achieved in that a kind of modified ardealite setting retarder for cement, comprises phosphogypsum, properties-correcting agent, and described properties-correcting agent is red mud, and phosphogypsum is 70 ~ 90% by mass percentage, properties-correcting agent is 10-30%.
Wherein, the water ratio of described phosphogypsum is 10-30%.
Preferably, the water ratio of described phosphogypsum is 20%.
A preparation method for modified ardealite setting retarder for cement, its step is, is mixed by red mud, homogenizing, then more than ageing 24h with phosphogypsum by predetermined proportion, just can make modified ardealite setting retarder for cement.
Red mud is industrial residue and is alkalescence, as the properties-correcting agent of phosphogypsum, except making full use of industrial residue, reduce the cost of cement, also and Leaching Properties of Soluble Phosphorus and fluorine make its calcium phosphate being converted into indissoluble and Calcium Fluoride (Fluorspan) mineral substance, eliminate titanium pigment and fluorine to the impact of cement.The high calcareous waste residue of red mud, has cohesive action, can absorb part attached water in phosphogypsum, its water content is reduced simultaneously.The main mineralogical composition of red mud is γ-C2S, plays solidification to phosphogypsum, improves the early strength of cement.
Retardant is used as with red mud modified ardealite, solve discharge phosphogypsum and waste red mud residues land occupation, contaminate environment problem, its cement production enterprise can realize economic benefit and social benefit doulbe-sides' victory, thus be a kind of cement setting retarder be worthy of popularization with red mud as phosphogypsum modification agent, the substitute of gypsum can be become.
Embodiment
Below, in conjunction with example, substantive distinguishing features of the present invention and advantage are further described, but the present invention is not limited to listed embodiment.
Embodiment one
Select 70 weight part phosphogypsums, 30 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment two
Select 72 weight part phosphogypsums, 28 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment three
Select 75 weight part phosphogypsums, 25 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment four
Select 77 weight part phosphogypsums, 23 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment five
Select 80 weight part phosphogypsums, 20 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment six
Select 79 weight part phosphogypsums, 21 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment seven
Select 85 weight part phosphogypsums, 15 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment eight
Select 90 weight part phosphogypsums, 10 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment nine
Select 88 weight part phosphogypsums, 12 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Embodiment ten
Select 89 weight part phosphogypsums, 11 weight part red mud properties-correcting agent, mixing, homogenizing, then more than ageing 24h.
Claims (4)
1. a modified ardealite setting retarder for cement, is characterized in that, comprises phosphogypsum, properties-correcting agent, and described properties-correcting agent is red mud, and phosphogypsum is 70 ~ 90% by mass percentage, properties-correcting agent is 10-30%.
2. modified ardealite setting retarder for cement according to claim 1, is characterized in that, the water ratio of described phosphogypsum is 10-30%.
3. modified ardealite setting retarder for cement according to claim 2, is characterized in that, the water ratio of described phosphogypsum is 20%.
4. a preparation method for modified ardealite setting retarder for cement, is characterized in that, its step is, is mixed by red mud, homogenizing, then more than ageing 24h with phosphogypsum by predetermined proportion, just can make modified ardealite setting retarder for cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411793.6A CN105347714A (en) | 2014-08-18 | 2014-08-18 | Modified phosphogypsum cement retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410411793.6A CN105347714A (en) | 2014-08-18 | 2014-08-18 | Modified phosphogypsum cement retarder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105347714A true CN105347714A (en) | 2016-02-24 |
Family
ID=55323809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410411793.6A Pending CN105347714A (en) | 2014-08-18 | 2014-08-18 | Modified phosphogypsum cement retarder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105347714A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859172A (en) * | 2016-03-31 | 2016-08-17 | 武汉理工大学 | Phosphogypsum-based cement super-retarding agent and preparation method thereof |
| CN107954636A (en) * | 2017-12-17 | 2018-04-24 | 李巧珍 | A kind of preparation method of modified ardealite high temperature resistant type cement retarder |
| CN108585575A (en) * | 2018-06-19 | 2018-09-28 | 华润水泥技术研发（广西）有限公司 | Cement retarder and its preparation method and application |
| CN109704715A (en) * | 2019-01-23 | 2019-05-03 | 昆明理工大学 | A kind of method that red mud cooperates with stable curing with ardealite |
-
2014
- 2014-08-18 CN CN201410411793.6A patent/CN105347714A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105859172A (en) * | 2016-03-31 | 2016-08-17 | 武汉理工大学 | Phosphogypsum-based cement super-retarding agent and preparation method thereof |
| CN107954636A (en) * | 2017-12-17 | 2018-04-24 | 李巧珍 | A kind of preparation method of modified ardealite high temperature resistant type cement retarder |
| CN108585575A (en) * | 2018-06-19 | 2018-09-28 | 华润水泥技术研发（广西）有限公司 | Cement retarder and its preparation method and application |
| CN109704715A (en) * | 2019-01-23 | 2019-05-03 | 昆明理工大学 | A kind of method that red mud cooperates with stable curing with ardealite |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160224 |