CN1114295A - Process for preparing alkali-slag cement - Google Patents

Process for preparing alkali-slag cement Download PDF

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Publication number
CN1114295A
CN1114295A CN94111000A CN94111000A CN1114295A CN 1114295 A CN1114295 A CN 1114295A CN 94111000 A CN94111000 A CN 94111000A CN 94111000 A CN94111000 A CN 94111000A CN 1114295 A CN1114295 A CN 1114295A
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China
Prior art keywords
slag
alkali
slag cement
cement
exciting agent
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Pending
Application number
CN94111000A
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Chinese (zh)
Inventor
汪汝焜
吴昌义
王明辉
龙德琮
郭利君
吴欣慧
游明山
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Xiangtan Iron & Steel Co
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Xiangtan Iron & Steel Co
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Publication date
Application filed by Xiangtan Iron & Steel Co filed Critical Xiangtan Iron & Steel Co
Priority to CN94111000A priority Critical patent/CN1114295A/en
Publication of CN1114295A publication Critical patent/CN1114295A/en
Pending legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B7/00—Hydraulic cements
    • C04B7/14—Cements containing slag
    • C04B7/147—Metallurgical slag
    • C04B7/153—Mixtures thereof with other inorganic cementitious materials or other activators
    • C04B7/1535—Mixtures thereof with other inorganic cementitious materials or other activators with alkali metal containing activators, e.g. sodium hydroxide or waterglass
    • 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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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The alkali-slag cement is made up of blast furnace slag as main raw material, alkali metal as trigger and calcium hydroxide as setting retarder without high-temp. calcine and features high early strength, wear resistance, and resisting leakage, acid and alkali, and high quality up to mark no 625-725.

Description

The preparation of alkali---slag cement
The invention belongs to field of silicate technology.
At present, domestic general silicate series and goods thereof, its strength grade are 200 #-400 #Concrete and a large amount of what use is 200 #Concrete.Concrete and prepare these ordinary slag silicate cements is by raw materials such as grog behind the high-temperature calcination and slags, makes through certainweight percentage ratio proportioning.Therefore, need to drop into the production process that substantial contribution is built high-temperature calcination, need to consume a large amount of energy consumptions or the like thereupon, but also will bring the disadvantage of environmental pollution.Along with modernized science and technology development, structured material is had higher requirement, particularly to the strength of materials and durability requirement.According to prediction, to 21 century concrete will remain the building structural materials of dominant position, but must increase substantially intensity and weather resistance to it, could satisfy the needs of future architecture engineering.It is predicted to 2000 700 #Concrete will become normally used material, and at some in particular cases, will use 1000 #Above concrete, following execution conditions and constructional method will require to use on high workability and the ultrafast hard coagulation, and harsh environment for use will require significantly to improve wear resistance, impermeability, low hydration heat, frost resistance and resistance to chemical corrosion or the like.Satisfy these requirements, be difficult to accomplish for the concrete of present widely used silicate cement series, or even impossible.
Alkali---slag cement has only a few countries abroad, has carried out production application (Soviet Union Kiev B﹠amp of the institute of civil engineering as countries such as the Soviet Union, American and Britain; Jnnxoxun " alkali slag cement ", and have part institution of higher learning, research unit to carry out theoretic research and discussion (Nanjing Chemical Engineering College's history is army, Tang Renxiu " a kind of novel gelled material---alkali slag cement ") over nearly 10 years in China, but domestic application is not as yet more put into production.
Purpose of the present invention, be to prepare high strength, resistance to chemical attack, anti-permeability performance is good, hydration heat is low, anti-freezing property is strong concrete building structural materials, can be widely used in road engineering, airstrip, harbour engineering, sanitation project, dam culvert and salvaging, repairing work, resistance to chemical attack engineering etc.
The present invention is that the iron-smelting blast furnace slag adds three big components compositions such as exciting agent and retardant.Press the preparation of certainweight percentage ratio, its proportioning is slag 92-95%, exciting agent 3-5% and retardant 2-5%.Technical requirements branch to three big components is chatted as follows:
1, the scoriaceous basicity factor requirement of iron-smelting blast furnace is 1-1.2, that is: M o = Cao + MgO Si O 2 + A l 2 O 3 = 1 - 1.2 。Quality coefficient is greater than 1.7, that is: K = Cao + MgO + A l 2 O 3 Si O 2 + MnO + Ti O 2 > 1.7 。Water content is not more than one of percentage, that is:
Figure A9411100000043
2, exciting agent is the basic metal exciting agent, and its main component is water glass (Na 2SiO 3), and containing moisture and small amount of impurities, water glass has individual parameter modulus (M), i.e. SiO 6) and Na 2The ratio of the molecule number of O, or M = Si O 2 N a 2 O × 1.032 , wherein 1.032 is constant, that is: Na 2O molecular weight and SiO 2The ratio of molecular weight, the present invention requires the modulus M=1.5 of water glass, and its milliosmolarity is with Na in the water glass 2The weight percentage of O is counted 3.5-4.5%, is best with 4%.
3, retardant mainly is calcium hydroxide [Ca (OH) 2], be used to regulate alkali---the time of coagulation of slag cement, can regulate time of coagulation by 2-5% calcium hydroxide.
In the percentage ranges according to above-mentioned three big component regulations, prepare according to practical situation and the optional percentage ratio of needs, but three big set of dispense are absolutely than sum.
A kind of is the alkali that main component is formed---slag cement by the iron-smelting blast furnace slag, and percentage ratio preparation by weight is made up of slag 92-95%, exciting agent 3-5% and retardant 2-5%.Scoriaceous basicity factor is 1-1.2, and quality coefficient is greater than 1.7.Exciting agent is the basic metal exciting agent, and main component is water glass (Na 2SiO 3), its modulus M=1.5.Retardant is a calcium hydroxide.
The invention has the advantages that the intensity height, can reach more than 62.5-82.5MPa that strong to the adaptability of sand, gravel, intensity can reach 30-50MPa in 1 day, but 3 days these 50-60MPa of intensity; The rotten performance of chemically-resistant is good, to H 2SO 4, HCl, HNo 3All be better than silicate series cement with the corrosive nature of NaOH, anti-permeability performance is higher than one times of silicate cement; Hydration heat is low, is applicable to the large area concrete engineering; Good frost resistance can be through living 300-1000 freeze-thaw cycle; Gather materials---slurry interface bonding is firmly; And great advantage do not need also to be to prepare through high-temperature calcination, thereby saves the great amount of investment and the energy, and reduces environmental pollution.
The best embodiment of the present invention is:
1. the slag of .93% adds 3% calcium hydroxide by weight percentage, common mill as to specific surface area be 4000Cm 2About/g or the 0.08mm square hole sieve tail over about 3% ± 1%.
2. modulus (M) is that the incorporation of 1.5 water glass is by Na 2O counts about 4%, and the water glass add-on is pressed G = 400 WN (gram/hectogram), wherein WN is Na in the water glass 2The percentage composition of O.
3. strength trial is undertaken by the GB1344-92 GB, wherein water cement ratio is meant the ratio of water and slag (containing calcium oxide) weight, and the water that adds also should comprise the water in the water glass, and the tap water that every 100g slag powders also need add (by 0.44 water cement ratio) is (ml) G---water glass add-on (gram) H '---water content (%) of water glass of H=44-G * H '
4. try the body formed demoulding one day after, maintenance to regulation makes the phase test in wet air (R=100%) or water.
Alkali-the slag cement of the present invention's preparation, intensity can reach 625 #To 725 #Presetting period is 1 hour 20 minutes to 1 hour 40 minutes, and final setting time is 2 hours to 3 hours.But can regulate initial set and final setting time, so the present invention is again the leading material of construction of 21 century according to actual needs.

Claims (4)

1. one kind is the alkali that main component is formed---slag cement by the iron-smelting blast furnace slag, it is characterized in that, percentage ratio preparation by weight is made up of slag 92-95%, exciting agent 3-5% and retardant 2-5%.
2. alkali according to claim 1---slag cement is characterized in that: scoriaceous basicity factor is 1-1.2, and quality coefficient is greater than 1.7.
3. alkali according to claim 1---slag cement is characterized in that, exciting agent is the basic metal exciting agent, and main component is water glass (Na 2SiO 2), its modulus M=1.5.
4. alkali according to claim 1---slag cement is characterized in that retardant is a calcium hydroxide---(Ca 2(OH) 2).
CN94111000A 1994-05-21 1994-05-21 Process for preparing alkali-slag cement Pending CN1114295A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN94111000A CN1114295A (en) 1994-05-21 1994-05-21 Process for preparing alkali-slag cement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN94111000A CN1114295A (en) 1994-05-21 1994-05-21 Process for preparing alkali-slag cement

Publications (1)

Publication Number Publication Date
CN1114295A true CN1114295A (en) 1996-01-03

Family

ID=5034912

Family Applications (1)

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CN94111000A Pending CN1114295A (en) 1994-05-21 1994-05-21 Process for preparing alkali-slag cement

Country Status (1)

Country Link
CN (1) CN1114295A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100450949C (en) * 2006-08-15 2009-01-14 中国石油天然气集团公司 High-activity alkali ore slag fly ash inorganic polymer gel material and manufacturing method thereof
CN102531424A (en) * 2010-12-16 2012-07-04 山东科技大学 Slag-based quick-setting cementing material
CN108129077A (en) * 2017-11-17 2018-06-08 苏州科技大学 A kind of no first-hand datum concrete suitable for concrete precast pile
CN114180873A (en) * 2021-12-27 2022-03-15 武汉理工大学 Thermokalite-excited mineral powder crystal nucleus early strength agent, and preparation method and application thereof
CN114956614A (en) * 2022-05-30 2022-08-30 中国地质大学（武汉） Slag cement based on synergistic excitation of sodium citrate and caustic alkali and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100450949C (en) * 2006-08-15 2009-01-14 中国石油天然气集团公司 High-activity alkali ore slag fly ash inorganic polymer gel material and manufacturing method thereof
CN102531424A (en) * 2010-12-16 2012-07-04 山东科技大学 Slag-based quick-setting cementing material
CN108129077A (en) * 2017-11-17 2018-06-08 苏州科技大学 A kind of no first-hand datum concrete suitable for concrete precast pile
CN114180873A (en) * 2021-12-27 2022-03-15 武汉理工大学 Thermokalite-excited mineral powder crystal nucleus early strength agent, and preparation method and application thereof
CN114956614A (en) * 2022-05-30 2022-08-30 中国地质大学（武汉） Slag cement based on synergistic excitation of sodium citrate and caustic alkali and preparation method thereof

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