CN1061768A - Improve the method for production of cement of early strength - Google Patents
Improve the method for production of cement of early strength Download PDFInfo
- Publication number
- CN1061768A CN1061768A CN90105984A CN90105984A CN1061768A CN 1061768 A CN1061768 A CN 1061768A CN 90105984 A CN90105984 A CN 90105984A CN 90105984 A CN90105984 A CN 90105984A CN 1061768 A CN1061768 A CN 1061768A
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- Prior art keywords
- cement
- grog
- early strength
- anhydrite
- dihydrate gypsum
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to a kind of manufacture method that is intended to improve the various types of silicon acid salt cement of cement early strength, it be in the cement manufacturing process of routine, increase dihydrate gypsum and (or) heat treatment process of anhydrite, with dihydrate gypsum and (or) anhydrite goes into kiln and is fired to 750-1300 ℃, insulation was made silicate cement, ordinary Portland cement and other various types of silicon acid salt cement with grog or grog, the common grinding of mixing material after the discharging more than 0.5 hour.The cement setting time that adopts present method to make is short, the intensity height, and the early strength in 3 days is significantly increased, and later strength also has steady growth.
Description
The invention relates to the manufacture method of cement, comprise the silicate cement that does not contain mixing material and contain the manufacture method of other various types of silicon acid salt cement of various mixing materials.
As everyone knows, silicate cement be by calcium carbonate, clay matter and other auxiliary material (as irony) with certain proportion cooperate wear into raw material and burn to partial melting be the grog of main component with the Calucium Silicate powder, add that an amount of gypsum is levigate to form.As in grog, mixing an amount of slag, volcanic ash or fine coal sand-lime mixing material, it is levigate jointly to add an amount of gypsum again, then can be made into multiple kinds such as ordinary Portland cement or Portland blast, portland-pozzolan cement or Portland fly ash cement.
Slow in order to the cement setting speed that the top method is made, intensity is low, especially early strength is poorer, influence construction quality, particularly be mixed with the cement products of flyash, its early strength obviously descends with fly-ash-contained increase, for this reason, the incorporation of flyash generally is controlled at about 10%, and the factory that minority can be produced No. 625 grogs also only can mix about 20%, thereby makes the utilization of flyash in manufacture of cement be subjected to bigger restriction.
The purpose of this invention is to provide a kind of method for production of cement that improves early strength,, improve construction quality, under the prerequisite of proof strength, improve the incorporation of flyash in the cement simultaneously to improve cement performance.Reduce cement cost, and be beneficial to the comprehensive utilization of flyash, turn waste into wealth.
Cement manufacturing method of the present invention is the heat treatment process that increases one of dihydrate gypsum and anhydrite the two or the two in the cement manufacturing process of routine, be dihydrate gypsum and (or) anhydrite goes into kiln calcining earlier, more than being incubated half an hour under 750 °-1300 ℃ the high temperature, make silicate cement with the common grinding of grog by a certain percentage behind the kiln discharge, or with grog and various mixing material such as common grinding such as slag, flyash, make ordinary Portland cement and other various types of silicon acid salt cement.Concrete steps are as follows.
According to a conventional method Wingdale, clay, iron powder are mixed in proportion levigate calcining and make grog, according to the cement products type, not blending condensation material or infiltrate mixing materials such as a certain proportion of slag, flyash, volcanic ash, with dihydrate gypsum and (or) anhydrite goes into kiln and is calcined to 750 ° of-1300 ℃ of insulations at least 0.5 hour, discharging, 4-6% weighs by finished cement, with above-mentioned grog or be mixed with the same grinding of grog of mixing material, promptly make silicate cement or ordinary portland cement and other various types of silicon acid salt cement.The consumption of calcining dihydrate gypsum and calcined gypsum is with SO in the finished cement
3Total amount meets national Specification and exceeds less than 0.4%.
All kinds of cement that adopt the invention described above method to make are compared with the similar cement that existing method is made, under the identical situation of temperature, shorten its time of coagulation, bending and compressive strength improves, stable long-term strength increases, and early strength significantly improves, and wherein the folding strength in 3 days improves more than 3.5%, 28 days ultimate compression strength improves 20-27%, simultaneously its impermeability
Atmospheric performance also has greatly improved, because the raising of strength of cement performance, make the incorporation of flyash bring up to 25-30% by the 10-20% of prior art, scoriaceous incorporation can be brought up to more than 30%, be beneficial to the reduction cement cost, flyash is turned waste into wealth, be able to more efficient use.
Subordinate list has been listed process data and the product performance data of seven embodiment of the present invention, and wherein embodiment 1-5 respectively has a prior art embodiment (i.e. Comparative Examples in the table) in contrast.By table visible adopt dihydrate gypsum of the present invention and (or) all kinds of cement that the anhydrite thermal treatment process is produced, its time of coagulation, especially the presetting period obviously shortened, bending and compressive strength improves, especially the early strength in 3 days is greatly improved.
Claims (1)
- Improve the cement manufacturing method of early strength, comprise silicate cement that does not contain mixing material and the manufacture method that contains other all kinds of cement of mixing material, with calcareous raw material, clayey raw material and other auxiliary material (as irony) are mixed in proportion and are finely ground to raw material, go into the kiln mature calcined material, according to product type, not blending condensation material or mix a certain proportion of slag, volcanic ash, mixing materials such as flyash, it is characterized in that with dihydrate gypsum and (or) anhydrite goes into kiln and is fired to 750 ° of-1300 ℃ of insulations at least 0.5 hour, discharging is weighed with above-mentioned grog by the 4-6% of finished product cement amount or is mixed with the common grinding of grog of mixing material, the calcining dihydrate gypsum and (or) consumption of calcined anhydrite is with SO in the finished cement 3Total content is not more than 4% of national Specification and exceeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90105984A CN1061768A (en) | 1990-11-27 | 1990-11-27 | Improve the method for production of cement of early strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN90105984A CN1061768A (en) | 1990-11-27 | 1990-11-27 | Improve the method for production of cement of early strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1061768A true CN1061768A (en) | 1992-06-10 |
Family
ID=4879730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN90105984A Pending CN1061768A (en) | 1990-11-27 | 1990-11-27 | Improve the method for production of cement of early strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1061768A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102133C (en) * | 1997-12-25 | 2003-02-26 | 张耀伦 | Less clinker high early strength flyash cement |
| CN101717209B (en) * | 2009-11-13 | 2012-09-19 | 南京工业大学 | Secondary synthesis method of calcium sulfoaluminate minerals in metasilicate cement clinker |
-
1990
- 1990-11-27 CN CN90105984A patent/CN1061768A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1102133C (en) * | 1997-12-25 | 2003-02-26 | 张耀伦 | Less clinker high early strength flyash cement |
| CN101717209B (en) * | 2009-11-13 | 2012-09-19 | 南京工业大学 | Secondary synthesis method of calcium sulfoaluminate minerals in metasilicate cement clinker |
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