CN100429169C - Novel high sulfur-resistant cement - Google Patents
Novel high sulfur-resistant cement Download PDFInfo
- Publication number
- CN100429169C CN100429169C CNB031573967A CN03157396A CN100429169C CN 100429169 C CN100429169 C CN 100429169C CN B031573967 A CNB031573967 A CN B031573967A CN 03157396 A CN03157396 A CN 03157396A CN 100429169 C CN100429169 C CN 100429169C
- Authority
- CN
- China
- Prior art keywords
- cement
- slag
- sulfur
- resistance
- gypsum
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Classifications
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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
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/243—Mixtures thereof with activators or composition-correcting additives, e.g. mixtures of fly ash and alkali activators
-
- 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)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a new-type cement with a high resistance to the sulfur which comprises 20-70 wt.% of common silicate grog, 3-10 wt.% of gesso kind, 0-10 wt.% of microdilatancy component, 20-70 wt.% of functionality mineral admixture and 0-2 wt.% of grinding aid. The mineral admixture is composed of grammite, flyash, graining blast-furnace cinder, slag, steel slag, graining blast-furnace phosphorus slag, limestone, kiln dust or other eruption. The cost of the new-type cement with a high resistance to the sulfur is equal to the cement with a medium resistance and cement with a high resistance to the sulfur. The strength is equal to the common silicate cement. But the resistance to sulfate and the resistance to seawater is obviously better than former cement with a medium resistance and cement with a high resistance to the sulfur. The invention can improve the quality of the ocean engineering and beton resists to erosion, prolongs the service life of the beton and has an outstanding technique, economy and community benefit. The new-type cement with a high resistance to the sulfur is widely applied in the ocean engineering.
Description
Technical field
The present invention relates to engineering materials, be specifically related to a kind of the have excellent sulfate resistance and the silicate cement of marine denudation effect.
Background of invention
China is a continent country, is again a maritime state.Along with the fast development of China's economic construction, China more and more payes attention to the construction of exploitation, littoral zone and the bridge spanning the sea of oceanic resources.The for example bridge pier of the harbour in the construction project of ocean, bridge spanning the sea, seawall bank, dock, waterborne moveable source mill, offshore drilling platforms, seabed oil tank and tunnel, the inferior engineering of pipeline littoral; In addition, in many geographic underground water of provinces such as western China such as Qinghai, Xinjiang and soil, contain soluble salts such as a large amount of rock salt, saltcake, gypsum, SO
4 2-Dense.Sulphate resisting portland cement and high sulfate-resistant cement were to add the neat portland cement that the common grinding of a small amount of dihydrate gypsum forms with the Portland clinker that meets certain mineral composition requirement during China was existing, and its corrosion-resistant property is very not desirable.
Summary of the invention
Main purpose of the present invention is to provide a kind of good anti-SO that has
4 2-And the high sulfate-resistant cement of marine denudation characteristic.
A kind of novel high sulfate-resistant cement provided by the invention is mixed by weight by following component:
Normal silicate grog: 20-70,
Gypsum class: 3-10,
Microdilatancy component: 3-10,
Functional mineral adulterant: 20-70, and
Grinding aid: 0-2.
Wherein, described gypsum class is dihydrate gypsum, anhydrite or industry by-product gypsum; Described microdilatancy component is at least a in alunite, calcined alunite and the high alumina, or a kind of combination in itself and bulking agent of calcium aluminate, sulphoaluminate expander (UEA swelling agent), the CEA swelling agent; Described mineral admixture is the silicon ash, or be silicon ash with flyash, granulated blast-furnace slag, slag, slag, granulation blast furnace phosphorus slag, Wingdale and kiln ash in one or more mixing material; Described grinding aid is a cement grinding technology admixture, as trolamine or talcum powder.
Embodiment
For opener, below from several respects narration the present invention.
Novel high sulfate-resistant cement provided by the invention is that to add the 20-70% activity siliceous to meet Portland clinker that certain mineral composition requires, high-strength, erosion-resistant functional adulterant and the common grinding of proper amount of gypsum are made so that its corrosion-resistant property in seawater and sulphate attack solution obviously be better than existing in anti-and high sulfate-resistant cement.
Sulfate resisting Portland cement and high sulfate resisting Portland cement during existing sulfate resisting Portland cement mainly is divided into.According to standard GB/T748 " sulfate resisting Portland cement ", sulfate resisting Portland cement should meet the following requirements:
1. the mineral constituent of sulfate resisting Portland cement meets: C
3A＜5%, C
3S is＜55%;
2. magnesium oxide: MgO≤5.O% in the cement.
3. sulphur trioxide: SO in the cement
3≤ 2.5%.
4. insolubles: insolubles must not surpass 1.50% in the cement.
5. specific surface area: specific surface area 〉=280m
2/ kg.
6. time of coagulation: initial set is no earlier than 45min, and final set is earlier than 10h.
7. stability: be up to the standards with boiling process.
8. alkali content: alkali content is pressed Na in the cement
2O+0.658K
2The O calculated value represents, if decided through consultation by both sides of supply and demand when using reactive aggregate need limit in the cement alkali content.
9. intensity: each label, each age strength must not be lower than tabular value (being undertaken by GB/T177-85) down
The present invention is satisfying on the basis that above-mentioned intensity index requires, and focuses on the performance of sulfate resistance and marine denudation to increase significantly.For this reason, it is as follows that the present invention proposes new cement formula: by weight, and normal silicate grog 20-70 part, gypsum class 3-10 part, microdilatancy component 0-10 part, mineral admixture 20-70 part, and grinding aid 0-2 part.
Here used material is selected for use by following requirement, the normal silicate grog: C in the grog
3A＜8.0%, 28 day ultimate compression strength is greater than 58.0MPa (GB method); Gypsum class material selection dihydrate gypsum: SO
3＞30%, anhydrite or industry by-product gypsum: SO
3＞45%, gypsum class material is used to regulate time of coagulation in this law invention; Microdilatancy component: comprise alunite, calcined alunite, high alumina, bulking agent of calcium aluminate, sulphoaluminate expander (UEA swelling agent), CEA swelling agent or composite expanding agent etc., play the microdilatancy effect, tool protection against corrosion and anti-chap contractile function; Functional mineral adulterant: comprise silicon ash, flyash, granulated blast-furnace slag, slag, slag, granulation blast furnace phosphorus slag, Wingdale, kiln ash or other pozzolana mixed materials, add according to specific geographic situation selectivity, with the further cement characteristics of improving, as improving erosion-resisting characteristics, improve the cement concrete early strength, improving the compaction rate of hydrated cementitious etc.; Grinding aid also is the component that selectivity is added, and is cement grinding technology admixture, adds according to the difference of concrete construction requirement, and is selectable as trolamine or talcum powder etc.Above-mentioned all material all can obtain from the market.
Embodiment one: select materials is respectively:
Normal silicate grog: 50.0 kilograms
Dihydrate gypsum: 6.0 kilograms
Microdilatancy component: 5.0 kilograms of alunites
Functional mineral adulterant: 39.0 kilograms of silicon ashes
Adopt following technology to make:
1. distinguish grinding:
1) functional mineral adulterants such as slag and microdilatancy component are dried in dryer be less than 2% to water content after, be milled to specific surface area greater than 400m
2/ kg.
2) with pressing the common grinding of proportioning after normal silicate grog and the dihydrate gypsum fragmentation, be milled to specific surface area greater than 400m
2/ kg.
3) in proportion with several powder uniform mixing.
2. common grinding:
1) according to the grinding requirement, with required various starting material oven dry and broken.
2) by the proportioning of design several raw materials are mixed, jointly grinding to specific surface area greater than 400m
2/ kg.
Embodiment two to six: by the described material of table 1, adopt the technology of embodiment one to make:
The former material assembly unit of table 1: embodiment two to six: kilogram
The cement that above-mentioned whole embodiment are made carries out Performance Detection, and the result is as follows:
1) sulfate resistance and anti-marine denudation performance
Carry out Performance Detection by St Cement Q Supervision ﹠ Testing Center by GB2420 " Rapid test for sulphate resistance of cement ", 3%, 10%Na
2SO
4In the attack solution of seawater, 3 times of concentration seawater, its anti-erosion coefficient (in attack solution in the intensity of maintenance and the water ratio of the intensity of normal maintenance) K value can reach 1 even surpass 1, has the sulfate resistance and the anti-marine denudation performance of excellence.
2) hydration heat of cement
Because cement of the present invention mixes 20-70% functional mineral adulterant when grinding, can obviously reduce hydration heat, detect through St Cement Q Supervision ﹠ Testing Center, the hydration heat of its 3 days and 7 days is near low heat portland blast-furnace-slag cement.This is for mass concrete, and it is very favourable to reduce hydration heat as engineerings such as the harbour in the construction project of ocean, bridge piers.
3) but the workability of the cement concrete of high sulfate-resistant cement of the present invention preparation and workability be better than original in sulphate resisting portland cement and high sulfate-resistant cement.
4) strength grade
Each strength grade of high sulfate-resistant cement, each age strength of being invented must not be lower than tabular value (being undertaken by GB/T17671) down.
Sulphate resisting portland cement and high sulfate-resistant cement are made as 425,525 two labels by the GB method in original, are equivalent to 32.5,42.5 strength grades of ISO method approximately.Novel high sulfate-resistant cement provided by the invention has increased ISO method 52.5 strength grades, is equivalent to GB method 625 cement, improves a strength grade than primary standard.Identical among the index of each strength grade and the GB175-1999 " silicate cement, ordinary Portland cement " in the table 2.
The intensity index of table 2 each strength grade of high sulfate-resistant cement of the present invention
Use novel high sulfate-resistant cement of the present invention, cost and original middle sulphate resisting portland cement and high sulfate-resistant cement are suitable, intensity is then come requirement according to the strength grade of ordinary Portland cement, and sulfate resistance and anti-marine denudation effect obviously are better than original middle sulphate resisting portland cement and high sulfate-resistant cement.The application of high sulfate-resistant cement of the present invention and popularization, for improve oceanographic engineering and anti-corrosion concrete quality, prolong concrete work-ing life, have significant technology, economic and social benefit.Novel high sulfate-resistant cement has vast produce market, can be widely used in the oceanographic engineering of China southeastern coast each province.
Claims (4)
1. high sulfate-resistant cement is characterized in that: mixed by weight by following component:
Normal silicate grog: 20-70,
Gypsum class: 3-10,
Microdilatancy component: 3-10,
Functional mineral adulterant: 20-70, and
Grinding aid: 0-2; Wherein:
Described gypsum class is dihydrate gypsum, anhydrite or industry by-product gypsum;
Described microdilatancy component is at least a in alunite, calcined alunite and the high alumina, or a kind of combination in itself and bulking agent of calcium aluminate, sulphoaluminate expander and the CEA swelling agent;
Described functional mineral adulterant is the silicon ash, or be silicon ash with flyash, granulated blast-furnace slag, slag, slag, granulation blast furnace phosphorus slag, Wingdale and kiln ash in one or more mixing material;
Described grinding aid is trolamine or talcum powder.
2. high sulfate-resistant cement as claimed in claim 1 is characterized in that: mixed by weight by following component:
The normal silicate grog: 50.0,
Dihydrate gypsum: 6.0,
Alunite: 5.0, and
Silicon ash: 39.0 kilograms.
3. high sulfate-resistant cement as claimed in claim 1 is characterized in that: mixed by weight by following component:
The normal silicate grog: 45.0,
Dihydrate gypsum: 4.0,
Calcined alunite: 2.0,
High alumina: 2.0,
The UEA swelling agent: 2.0,
The silicon ash: 10.0,
Slag: 20.0
Wingdale: 10.0, and
Trolamine: 1.0.
4. high sulfate-resistant cement as claimed in claim 1 is characterized in that: mixed by weight by following component:
The normal silicate grog: 70.0,
Anhydrite: 8.0,
Calcined alunite: 3.0,
The silicon ash: 5.0,
Slag: 8.0, and
Granulation blast furnace phosphorus slag: 7.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031573967A CN100429169C (en) | 2003-09-19 | 2003-09-19 | Novel high sulfur-resistant cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031573967A CN100429169C (en) | 2003-09-19 | 2003-09-19 | Novel high sulfur-resistant cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101037306A CN101037306A (en) | 2007-09-19 |
| CN100429169C true CN100429169C (en) | 2008-10-29 |
Family
ID=38888508
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031573967A Expired - Lifetime CN100429169C (en) | 2003-09-19 | 2003-09-19 | Novel high sulfur-resistant cement |
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| CN (1) | CN100429169C (en) |
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| US7799128B2 (en) * | 2008-10-10 | 2010-09-21 | Roman Cement, Llc | High early strength pozzolan cement blends |
| DE102008055064A1 (en) * | 2008-12-22 | 2010-06-24 | Wacker Chemie Ag | Acid-resistant, hydraulically setting compounds |
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| CN109020270A (en) * | 2018-08-17 | 2018-12-18 | 华南理工大学 | A kind of high resistance to corrosion composite Portland cement and preparation method thereof |
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| CN109437649A (en) * | 2018-12-29 | 2019-03-08 | 浙江广厦建设职业技术学院 | A kind of preservative of Concrete Resist Reinforcing Sulfate Corrosion and preparation method thereof |
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| CN113200689A (en) * | 2021-05-18 | 2021-08-03 | 山东崇正特种水泥有限公司 | Production method for improving sulfate erosion resistance and chloride permeability resistance of portland cement |
| CN115974447B (en) * | 2023-01-10 | 2024-04-26 | 山东高速建设管理集团有限公司 | Additive for red mud-based high sulfur-resistant cement-based material, and preparation method and application thereof |
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| CN1067872A (en) * | 1991-06-18 | 1993-01-13 | 浙江大学 | Quickly-expanding alunite self-stressing cement and making condition thereof |
-
2003
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1065849A (en) * | 1991-04-17 | 1992-11-04 | 文铁生 | Steel slag cement |
| CN1067872A (en) * | 1991-06-18 | 1993-01-13 | 浙江大学 | Quickly-expanding alunite self-stressing cement and making condition thereof |
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| CN101037306A (en) | 2007-09-19 |
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