CN102795798A - Method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride - Google Patents
Method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride Download PDFInfo
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- CN102795798A CN102795798A CN2012102489403A CN201210248940A CN102795798A CN 102795798 A CN102795798 A CN 102795798A CN 2012102489403 A CN2012102489403 A CN 2012102489403A CN 201210248940 A CN201210248940 A CN 201210248940A CN 102795798 A CN102795798 A CN 102795798A
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- slag
- alkali
- gelling material
- sodium hydroxide
- chlor
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
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Abstract
The invention relates to a method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride, which comprises the following steps: exciting slag with an alkaline excitant NaOH to prepare alkali cement, and curing the cement for some time; and putting the cured alkali cement in an NaCl solution, and standing for some time to enhance the strength of the alkali excited slag cement. The method for preparing the alkali cement by exciting slag with the alkaline excitant NaOH comprises the following steps: grinding the slag until the specific area reaches 500 m<2>/kg, adding NaOH which accounts for 0.5-15 wt% of the slag, evenly mixing, adding water, and stirring. The invention can enhance the later strength and prevent the later strength from reduction, thereby improving the mechanical properties of the alkali excited slag cement; and the invention has the characteristics of simple technique, energy saving and environmental protection, is simple to operate and convenient to control, and is convenient for industrialized application.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of method of using sodium-chlor to improve sodium hydroxide activated slag gelling material intensity.
Background technology
Alkali excites gelling material as a kind of inorganic nonmetal gelled materials, has long developing history.Performances such as its pressure-proof and snap-resistent intensity, antiacid alkali erosiveness, freeze-thaw resistance, anti-carbonization all are superior to ordinary Portland cement.Alkali excite gelling material preparation technology simple, need not to fire, energy consumption is low, cost is low, market is wide, is the most potential a kind of gelling material of 21 century.This type material is many to be main raw material(s) with the aluminum silicate mineral.Can be used for preparing alkali and excite the natural mineral of gelling material and industrial solid castoff that slag, slag, phosphorus slag, coal gangue, metakaolin, kaolin, flyash are arranged, aluminosilicate material such as silicon ash, slag, mine tailing.Slag mainly consists of the glass state material of alumina-silica and calcium magnesium oxide because of it, and these glass state materials have higher heat energy, thereby has very high hydraulically active, has obtained extensive studies the most.Yet the alkali excitation material exists later strength to increases slowly and issues limit such as retraction its application in heavy construction.
Summary of the invention
In order to overcome the deficiency of above-mentioned prior art, the object of the present invention is to provide a kind of method of using sodium-chlor to improve sodium hydroxide activated slag gelling material intensity, can improve its later strength; Prevent the later strength retraction, thereby improved alkali-activated slag gelling material mechanical property, it is simple that the present invention has technology; Energy-conserving and environment-protective; Simple to operate, control is convenient, is convenient to the characteristics of industrial applications.
To achieve these goals, the technical scheme of the present invention's employing is:
A kind of method of using sodium-chlor to improve sodium hydroxide activated slag gelling material intensity comprises the steps:
Step 1 uses NaOH to prepare alkali binding material as the alkali-activator activated slag, then with gelling material maintenance certain hour;
Step 2 places NaCl solution to deposit the intensity that for some time can improve the alkali-activated slag gelling material alkali binding material after the maintenance;
Above-mentioned slag comprises: CaO:30.1～42.5%, Al2O3:9.3～12.6%, MgO:5.3～17.8%, SiO
2: 26.4～39.5% and impurity, above percentage composition is the per-cent that corresponding component accounts for the slag gross weight.
Saidly with NaOH as the method that the alkali-activator activated slag prepares alkali binding material be: is 500m with slag milling to specific surface area
2/ kg, the NaOH that adds slag weight 0.5～15% mixes, and the water that adds slag weight 30-70% then stirs.
Said stirring uses mortar mixer to realize, in whipping process, adds the sand of slag weight 50-400%, stirs to finish the back layering and pour in three gang moulds of 40mm * 40mm * 160mm and use plain bumper jolt ramming.
Curing condition is maintenance or maintenance in air in water in the said step 1, and curing temperature is-15 ℃～90 ℃.
The mass concentration of NaCl solution is 0.5～4.11% in the said step 2.
Contain 0～10% mg ion or calcium ion or sulfate ion or potassium ion in the said step 2 NaCl solution.
The alkali-activated slag gelling material places NaCl solution to deposit continuously in the said step 2, and the storage temperature scope is-15 ℃～90 ℃, and the shelf-time is 1 day～400 days.
The alkali-activated slag gelling material is deposited with the atmospheric environment interval in NaCl solution in the said step 2, in NaCl solution, deposits earlier, and TR is-15 ℃～90 ℃; Shelf-time is 1 day～60 days, in atmospheric environment, deposits again, and TR is 25 ℃～250 ℃; Shelf-time is 1 day～60 days; So alternately get final product, generally speaking, replace when depositing at interval 10-50 time preferable.
Compared with prior art, advantage of the present invention is:
Traditional portland is owing to its aquation, the principle of condensing are different from the alkali-activated slag gelling material; Carbonate in hydrated reaction products such as the calcium hydroxide after the hardening of cement in the structure and the environment; Cl ions, sulfate ion, mg ions etc. are participated in reaction; Cause water mudrock structure to be destroyed, thereby reduced the intensity of building structure.Compare with existing traditional portland, the present invention can guarantee that the intensity of alkali excitation material in sodium chloride solution does not reduce on the contrary and can promote significantly, is specially adapted to high salinity property environment such as western salt lake.
Existing raising alkali excites the method for gelling material intensity mainly through adjustment exciting agent incorporation, increases methods such as slag fineness, considers to excite gelling material intensity from feedstock property and proportioning aspect raising alkali, and increase rate is limited.The present invention improves gelling material intensity through the alkali excitation material after the moulding is placed particular solution, and the intensity increase rate is higher, and is more economical, has more operability.
Embodiment
Below in conjunction with embodiment the present invention is explained further details.
Is 500m with grinding in advance to specific surface area with exciting agent (NaOH)
2The slag of/kg mixes by the proportioning shown in the table 1; The water that adds slag weight 50% then stirs the sand that adds slag weight 300% simultaneously with mortar mixer; Stir to finish the back layering and pour in three gang moulds of 40mm * 40mm * 160mm and use plain bumper jolt ramming, surperficial with doctor blade and marked, be 20 ℃ in temperature; Humidity is 95% the interior maintenance demoulding after 24 hours of maintaining box, and various proportionings are respectively made nine three gang moulds.The curing room maintenance 7 days of temperature (20 ± 3) ℃ is put in test block after the demoulding, and intensity test is carried out in the test block of different proportionings, and intensity results is seen table 2.The test block of all the other each proportionings is divided into two groups, and maintenance is carried out drying and watering cycle with test block in maintenance processes in the sodium chloride solution of clear water and quality solubility 4% respectively; Promptly place NaCl solution (mass concentration scope 0.5～4.11% all can) and clear water to soak earlier 12 hours, taking out the baking oven of putting into 105 ℃ again, to dry by the fire 8 hours be a circulation, carries out so repeatedly; Tested respectively 7 days, 17 days, 27 days; 37 days, 47 days ultimate compression strength, the result sees table 2.
Table 1 alkali-activated slag gelling material proportioning
Table 2 cement and alkali excite the ultimate compression strength of gelling material test block
Can find out that from table 2 the test specimen intensity in the clear water is left in contrast in, the test specimen intensity that leaves in the NaCl solution all was improved largely in each time period, and the shelf-time is long more, and the intensity increase is many more.
In order to simplify technology; Maintenance in NaCl solution also can directly be deposited continuously; The storage temperature scope is-15 ℃～90 ℃; Shelf-time is 1 day～400 days; Also allow to contain 0～10% ion in the NaCl solution simultaneously; Like mg ion, calcium ion, sulfate ion, potassium ion etc., with the test block of identical proportioning respectively in-15 ℃ of NaCl solution that contain 1% mg ion continuously 100 days, 0 ℃ of maintenance contain in the NaCl solution of 5% calcium ion in the NaCl solution that 200 days, 30 ℃ of maintenances continuously contain 5% sulfate ion in the NaCl solution that 300 days, 80 ℃ of maintenances continuously contain 8% sulfate ion in the NaCl solution that 300 days, 90 ℃ of maintenances continuously contain 10% potassium ion maintenance continuously 400 days, record ultimate compression strength under the same test condition all more than 50.
The present invention is based on NaCl NaCl crystallization crystal in secondary excitation effect of alkali excitation material and the NaCl solution is improved intensity to the filling effect of test specimen hole; Described slag refers to the slag in the Cement industry, and its cost roughly comprises: CaO:30.1～42.5%, Al2O3:9.3～12.6%, MgO:5.3～17.8%, SiO
2: 26.4～39.5% and surplus impurity.
Claims (9)
1. a method of using sodium-chlor to improve sodium hydroxide activated slag gelling material intensity comprises the steps:
Step 1 uses NaOH to prepare alkali binding material as the alkali-activator activated slag, then with gelling material maintenance certain hour;
Step 2 places NaCl solution to deposit the intensity that for some time can improve the alkali-activated slag gelling material alkali binding material after the maintenance;
Above-mentioned slag comprises: CaO:30.1～42.5%, Al2O3:9.3～12.6%, MgO:5.3～17.8%, SiO
2: 26.4～39.5% and impurity, above percentage composition is the per-cent that corresponding component accounts for the slag gross weight.
2. improve the method for sodium hydroxide activated slag gelling material intensity according to the said use sodium-chlor of claim 1; It is characterized in that, saidly with NaOH as the method that the alkali-activator activated slag prepares alkali binding material be: is 500m with slag milling to specific surface area
2/ kg, the NaOH that adds slag weight 0.5～15% mixes, and adds slag weight 30-70% water then and stirs.
3. improve the method for sodium hydroxide activated slag gelling material intensity according to the said use sodium-chlor of claim 2; It is characterized in that; Said stirring uses mortar mixer to realize; The sand that in whipping process, adds slag weight 50-400% stir to finish the back layering and pours in three gang moulds of 40mm * 40mm * 160mm and use plain bumper jolt ramming.
4. improve the method for sodium hydroxide activated slag gelling material intensity according to the said use sodium-chlor of claim 1, it is characterized in that curing condition is maintenance or maintenance in air in water in the said step 1, curing temperature is-15 ℃～90 ℃.
5. improve the method for sodium hydroxide activated slag gelling material intensity according to the said use sodium-chlor of claim 1, it is characterized in that the mass concentration of NaCl solution is 0.5～4.11% in the said step 2.
6. according to the method for claim 1 or 5 said use sodium-chlor raising sodium hydroxide activated slag gelling material intensity, it is characterized in that, contain 0～10% mg ion or calcium ion or sulfate ion or potassium ion in the said step 2 NaCl solution.
7. improve the method for sodium hydroxide activated slag gelling material intensity according to the said use sodium-chlor of claim 1; It is characterized in that; The alkali-activated slag gelling material places NaCl solution to deposit continuously in the said step 2; The storage temperature scope is-15 ℃～90 ℃, and the shelf-time is 1 day～400 days.
8. improve the method for sodium hydroxide activated slag gelling material intensity according to the said use sodium-chlor of claim 1, it is characterized in that the alkali-activated slag gelling material is deposited with the atmospheric environment interval in the said step 2 in NaCl solution; In NaCl solution, deposit earlier, TR is-15 ℃～90 ℃, and the shelf-time is 1 day～60 days; In atmospheric environment, deposit again; TR is 25 ℃～250 ℃, and the shelf-time is 1 day～60 days, so alternately gets final product.
9. said according to Claim 8 use sodium-chlor improves the method for sodium hydroxide activated slag gelling material intensity, it is characterized in that, replaces 10-50 time when depositing at interval.
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| CN2012102489403A CN102795798B (en) | 2012-07-18 | 2012-07-18 | Method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride |
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| CN2012102489403A CN102795798B (en) | 2012-07-18 | 2012-07-18 | Method for enhancing strength of sodium hydroxide excited slag cement by using sodium chloride |
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| CN102795798B CN102795798B (en) | 2013-08-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386991A (en) * | 2014-10-27 | 2015-03-04 | 西安建筑科技大学 | Sodium silicate alkali activated slag concrete recycling method |
| CN104402256A (en) * | 2014-10-27 | 2015-03-11 | 西安建筑科技大学 | Cyclic utilization method for sodium-hydroxide alkali activated slag concrete based on chemical composition |
| CN109437610A (en) * | 2018-12-18 | 2019-03-08 | 西安建筑科技大学 | A method of cementitious material is prepared using Cha Er Han Salt Lake solution and slag, silicon ash |
| CN109437698A (en) * | 2018-12-18 | 2019-03-08 | 西安建筑科技大学 | A method of using Cha Er Han Salt Lake solution and slag, coal ash for manufacturing for cementitious material |
| CN116217104A (en) * | 2023-01-12 | 2023-06-06 | 清华大学 | Multi-source solid waste synergistic full solid waste high-strength cementing material and preparation thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069958A (en) * | 1992-06-20 | 1993-03-17 | 轻工业部制盐工业科学研究所 | A kind of material that can be used for salt pan (pond) |
| JP2001261396A (en) * | 2000-03-17 | 2001-09-26 | Sekisui Chem Co Ltd | Hardening accelerator for cement and hardened cement produced by using the same |
| CN101717226A (en) * | 2009-11-27 | 2010-06-02 | 同济大学 | Method for solidifying blast furnace slag into building material |
| CN102531438A (en) * | 2012-03-02 | 2012-07-04 | 东南大学 | Alkali-activated slag mortar |
-
2012
- 2012-07-18 CN CN2012102489403A patent/CN102795798B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1069958A (en) * | 1992-06-20 | 1993-03-17 | 轻工业部制盐工业科学研究所 | A kind of material that can be used for salt pan (pond) |
| JP2001261396A (en) * | 2000-03-17 | 2001-09-26 | Sekisui Chem Co Ltd | Hardening accelerator for cement and hardened cement produced by using the same |
| CN101717226A (en) * | 2009-11-27 | 2010-06-02 | 同济大学 | Method for solidifying blast furnace slag into building material |
| CN102531438A (en) * | 2012-03-02 | 2012-07-04 | 东南大学 | Alkali-activated slag mortar |
Non-Patent Citations (1)
| Title |
|---|
| 余发红: "抗盐卤腐蚀的水泥混凝土的研究现状与发展方向", 《硅酸盐学报》, vol. 27, no. 2, 30 April 1999 (1999-04-30) * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104386991A (en) * | 2014-10-27 | 2015-03-04 | 西安建筑科技大学 | Sodium silicate alkali activated slag concrete recycling method |
| CN104402256A (en) * | 2014-10-27 | 2015-03-11 | 西安建筑科技大学 | Cyclic utilization method for sodium-hydroxide alkali activated slag concrete based on chemical composition |
| CN104386991B (en) * | 2014-10-27 | 2016-04-13 | 西安建筑科技大学 | Water glass alkali-activated slag concrete circulation utilization method |
| CN109437610A (en) * | 2018-12-18 | 2019-03-08 | 西安建筑科技大学 | A method of cementitious material is prepared using Cha Er Han Salt Lake solution and slag, silicon ash |
| CN109437698A (en) * | 2018-12-18 | 2019-03-08 | 西安建筑科技大学 | A method of using Cha Er Han Salt Lake solution and slag, coal ash for manufacturing for cementitious material |
| CN109437610B (en) * | 2018-12-18 | 2021-06-04 | 西安建筑科技大学 | Method for preparing cementing material by using Chaer sweat salt lake solution, slag and silica fume |
| CN116217104A (en) * | 2023-01-12 | 2023-06-06 | 清华大学 | Multi-source solid waste synergistic full solid waste high-strength cementing material and preparation thereof |
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| CN102795798B (en) | 2013-08-14 |
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Granted publication date: 20130814 Termination date: 20210718 |