CN1876593A - Silicate cement - Google Patents
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- CN1876593A CN1876593A CNA2005100265291A CN200510026529A CN1876593A CN 1876593 A CN1876593 A CN 1876593A CN A2005100265291 A CNA2005100265291 A CN A2005100265291A CN 200510026529 A CN200510026529 A CN 200510026529A CN 1876593 A CN1876593 A CN 1876593A
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
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Abstract
The invention discloses the silicate cement; comprising 20%-40% cement clinker, 54%-75% blast-furnace cinder, and 3%-10% silicon powder and 0.3%-5% accessory material. In the chamotte, C3A<=8%,MgO<=5%, tensile strength is above 58MPa for 28 days, the reactive index of blast-furnace cinder is above 95%, and specific surface area is above 400m2/kg. The reactive index of silicon powder is above 85%, and specific surface area is above 15000m2/kg. The accessory material is calcium sulfate. Using silicate cement, according to different durability design requirement, formulate the different strength high-performance concrete. The invention has the character of low hydrated heat, and has good meaning of controlling crack.
Description
Technical field:
The present invention relates to a kind of silicate cement that can precenting chlorate corrosion.
Background technology:
Many countries comprise China in the world today, all exist a large amount of steel bar corrosions based on chlorine salt corrosion to destroy problem.Along with China's rapid development of economy, a large amount of oceanographic engineerings such as bridge spanning the sea and deep-water quay etc. are a large amount of to be built, and the chloride erosion problem that oceanographic engineering faces becomes increasingly conspicuous, and has a strong impact on the work-ing life of structure.Therefore, the endurance issues of ocean reinforced concrete buildings causes concern more and more widely.
To the endurance issues of oceanographic engineering, present solution mainly is to adopt the compounding process of high-performance gelling material both at home and abroad, and method is to adopt to add the performance that active mineral admixture improves gelling material.Study in succession and in engineering, use as states such as external Denmark, Norway, Holland, Canada, Australia, Saudi Arabia, Japan.At home, China port and harbour construction group companies etc. are since the eighties in last century, surrounding high performance concrete compounding process and production technology have been launched a series of researchs, and are used widely in engineerings such as foreign mountain superport, Yantian Harbor Free Trade, Construction of Hangzhou Bay Cross-sea Bridge.But the compounding process of high performance concrete lacks unified standard, and the process for preparation more complicated brings inconvenience for construction and Engineering Quality Control, also is unfavorable for saving cost.
Occurred in the world in recent years preparing the trend that the required epoxy glue gel material of high performance concrete is included the special cement category in, developing with the formulated mixed cement of cement, ground slag powder and flyash as Korea S, the employed Type 10 SF cement of alliance's bridge that Northumberland (Northumberland) straits are crossed over by Canada also are a kind of special cements that contains 10% silica flour.Though have oil well cement, cement for dam, sulphate-resistant cement etc. can satisfy the special cement of features at home, the required anti-villaumite special cement in oceanographic engineering field still is in space state.
Summary of the invention:
The object of the present invention is to provide a kind of silicate cement that can precenting chlorate corrosion.
To achieve these goals, technical scheme of the present invention is that a kind of silicate cement is characterized in that ratio of components is: grinding fine cement grog 20%～40%, levigate ground granulated blast furnace slag 54%～75%, silica flour 3%～10%, subsidiary material 0.3%～5%.
Ratio of components among the present invention is weight percentage, and wherein levigate Portland clinker powder should meet every index of stipulating among the JC/T853, and levigate to 350m
2More than/the kg, and C in the grog
3A≤8%, MgO≤5%, 28 day ultimate compression strength 〉=58MPa.
Levigate ground granulated blast furnace slag should meet 28 days activity indexs of GB/T18046 regulation greater than 95%, and specific surface area 〉=400m
2/ kg.
Silica flour should meet 28 days activity indexs stipulating among the GB/T18736 greater than 85%, and specific surface area 〉=1500Gm
2/ kg.
Wherein subsidiary material should be and meet G class or above gypsum or the anhydrite of stipulating among the GB/T5483 of category-A secondary.
This product is by control (the grog C of two special technique indexs
3A≤8%, concrete charge pass≤1000 coulomb), product general physical chemical property reaches the national standard of Portland cement, and its resisting chloride ion penetration erosion performance significantly is better than Portland cement, hydration heat significantly is lower than Portland cement, satisfies the requirement of modern marine engineering and the anti-villaumite performance engineering of other needs.
Compare with the epoxy glue gel material compound method that high performance concrete in the past is used, anti-villaumite silicate cement not only is better than its preparing materials in the past on performance, can also make the construction regularization management of high performance concrete, appointment by the series of standards file, obtain superior performance, steady quality, reasonable price, the special cement new variety of being convenient to manage.
Embodiment:
In the preparation of high performance concrete, adulterant has become one of requisite component as the 6th component.Mineral admixture is not only given good workability of fresh concrete and mechanical property, and what is more important significantly improves concrete precenting chlorate corrosion performance.One of so core technology of preferably preparing anti-villaumite silicate cement of mineral admixture.
When the preparation high performance concrete, various adulterants generally mix with one-component.The slag grindability is poor, and price is also higher relatively, but strength development is very fast.The penetrating quality of ground slag concrete resisting chloride ion penetration is also relatively good.An amount of silica flour of admixture can improve concrete resistance of chloride ion penetration, but the silica flour price is higher, so volume is restricted.
By ancillary components such as mineral admixtures such as compound admixture slag, silica flour and gypsum, give full play to the effect of different adulterants, reach synergistic effect, satisfy the requirement of chloride-penetration resistance and low hydration heat.Shop experiment and rig-site utilization have all obtained good effect.According to great deal of experimental, for satisfying above-mentioned requirements, several main components of anti-villaumite silicate cement need satisfy following optimum principle:
(1) C in the cement
33 days hydration heat amounts of A are about C
33.7 times, the C of S
217.7 times of S, 7 days aquation heat then is about C respectively
37 times and the C of S
237 times of S; C
3The shrinking percentage of A approximately is C
3S and C
23 times of S.C
3The Ca (OH) that the S aquation produces
2Measure greatlyyer, and the chemical corrosion medium in the environment mainly is C to concrete erosion object
3Ca (OH) in A and the silicate minerals hydrate
2The R.Burrows of united states bureau of reclamation studies show that is not having under the reactive aggregate situation alkali content can increase the crack on concrete tendency.
For improving performance and reduction hydration heat such as volume stability of concrete, cracking resistance, the C of reply cement
3A content, specific surface area, alkali content and CaO content etc. are controlled.By the raw material and the production technique of control cement clinker, produce the cement that satisfies the low hydration heat requirement.Cement accounts for the overall control of gelling material 20%～40%, and C in the grog
3A≤8%.
(2) the ground slag particle has level and smooth and careful surface, lacks than cement granules stirring the initial stage adsorpting water quantity, therefore mixes slag and have good mobility and have in the effect that to a certain degree reduces concrete slump-loss in concrete.The temperature rise of ground slag concrete is relevant with the fineness of scoriaceous volume and ground slag.The slag that fineness is bigger has only higher volume obviously to reduce concrete hydration heat, and the hydration heat speed ratio normal concrete that ground slag concrete produces is slow.For reducing concrete heat, it is 65%～70% that volume is all recommended by American Concrete Institute (ACI) and U.S. slag cement association.Studies show that big volume slag micropowder concrete has excellent anti chlorion diffusion, the maximum doping quantity of slag differential can reach 90% of binder total amount in the concrete of low water binder ratio, and its specific surface area should be greater than 400m
2/ kg.
For guaranteeing the performance of maritime concrete, this ground slag powder accounts for binder total amount and is controlled at 54%～75%.
(3) silica flour is the great ultrafine powder of a kind of specific surface area, and an amount of silica flour of admixture can improve concrete strength and increase the concrete resistance of chloride ion penetration.Silicon powder doping quantity is crossed the workability that conference influences concrete mix, also can increase concrete contraction simultaneously.Silica flour accounts for binder total amount and is controlled at 3%～10%.
(4) subsidiary material: when grog grinds, add the effect that proper amount of gypsum can play grinding aid, also adjustable simultaneously joint cement setting time.
Obtain silicate cement of the present invention by above research, it is characterized in that, the component of described silicate cement is by grinding fine cement grog, levigate ground granulated blast furnace slag, silica flour and subsidiary material, their weight batching ratio is: grinding fine cement grog 20%～40%, levigate ground granulated blast furnace slag 54%～75%, silica flour 3%～10%, subsidiary material 0.3%～5%.
Wherein levigate Portland clinker powder should meet every index of stipulating among the JC/T853, and levigate to specific surface area 〉=350m
2/ kg, and C in the grog
3A≤8%, MgO≤5%, 28 day ultimate compression strength 〉=58MPa.
Table 1 is the physical and mechanical property test result of the cement made of the levigate grog of silicate, and its chemical constitution and mineral composition are shown in table 2, table 3.
The physical and mechanical property of table 1 grog
| Presetting period (hour) | Final setting time (hour) | Stability | Loss on ignition (%) | Folding strength (MPa) | Ultimate compression strength (MPa) | ||
| 3d | 28d | 3d | 28d | ||||
| 2:45 | 3:30 | Qualified | 2.0 | 6.9 | 9.4 | 38.1 | 59.4 |
The main chemical constitution (%) of table 2 grog
| SiO 2 | Fe 2O 3 | Al 2O 3 | CaO | MgO |
| 20.66 | 4.64 | 5.68 | 65.95 | 1.17 |
The essential mineral of table 3 grog is formed (%)
| C 3S | C 2S | C 3A | C 4AF |
| 60.1 | 13.9 | 7.3 | 14.1 |
Wherein levigate ground granulated blast furnace slag should meet 28 days activity indexs of GB/T18046 regulation greater than 95%, and specific surface area 〉=400m
2/ kg.
Silica flour should meet 28 days activity indexs stipulating among the GB/T18736 greater than 85%, and specific surface area 〉=15000m
2/ kg.
The levigate ground granulated blast furnace slag of active admixture that adopts and the physico mechanical characteristic of silica flour and chemical composition are respectively shown in table 4 and table 5.
The physics of table 4 adulterant and mechanical property
| Adulterant | Density (g/cm 3) | Specific surface area (m 2/kg) | Water content (%) | Loss on ignition (%) | Water demand ratio (%) | Activity index (%) | |
| 7d | 28d | ||||||
| Slag | 850 | 408 | 0.12 | 1.23 | 96 | 78 | 100 |
| Silica flour | 560 | 15000 | 0.25 | 3.09 | 100 | 82 | - |
The main chemical constitution of table 5 adulterant
| Adulterant | SiO 2 | Fe 2O 3 | Al 2O 3 | CaO | MgO | SO 3 | f·CaO |
| Slag | 40.32 | 10.63 | 19.68 | 23.72 | 0.95 | 0.80 | 0.30 |
| Silica flour | 96.30 | 0.60 | 0.20 | 0.90 | 0.30 | - | - |
Wherein subsidiary material should be and meet G class or above gypsum or the anhydrite of stipulating among the GB/T5483 of category-A secondary.
Below this prescription being improved concrete durability mechanism analyzes.
1, concrete system can be regarded as the particle packing system of continuous grading, and coarse aggregate clearance is filled by thin base-material gap, and thin base-material gap is filled by cement granules, and the gap between the cement granules then needs thinner particle to fill.Slag particle particle diameter ratio cement granules particle diameter among the present invention is little, and cement and extra material are mixed through suitable proportion, just may make gelatinous material have good continuous microstage and join.This micro aggregate effect makes in the hydration process gel material particle of different-grain diameter fill mutually, thereby reduces the overall porosity behind the composite gelled material system setting and harden, helps increasing concrete resistance of chloride ion penetration energy.
2, the composite blend system of selecting different sorts gelling material characteristic complementary adulterant to form can make gelling material mutual induction in hydration process excite, and has improved the gelation activity of adulterant.Simultaneously because the microcrystals effect of composite blend has been improved hydrate at inside concrete spatial uniform distribution.Therefore, the extent of hydration of " composite blend+skillful material cement " system is higher than the plain cement system with the length of time, compact structure, microtexture is good, thereby has significantly reduced the quantity capillaceous that is communicated with, its anti-permeability performance be improved significantly.
3, the influence of interfacial effect.Concrete can form water membrane around the aggregate in watering the process of smashing, caused interface filtrating area pore volume big, Ca (OH)
2Crystal enrichment and preferred orientation make interfacial transition zone become link the weakest in the concrete.Mix adulterants such as slag and can reduce Ca in the concrete (OH)
2Formation, and suppress Ca (OH)
2Crystal is grown in the interface region.Simultaneously, the particle size of various adulterants is less, and good water-retaining property can suppress the aggregate formation of moisture film on every side, thereby improves the structure of interfacial transition zone, and the cohesive force at hydrated product and aggregate interface is strengthened, and has also effectively improved MgCl
2, CaCl
2Deng salt to concrete erosion.
More than the comprehensive action of three aspects, make concrete have fine and close structure and good interfacial bond property, when showing the good mechanical performance, improved the ability of concrete chloride-penetration resistance significantly.
The weather resistance of anti-villaumite Portland cement concrete (PCC) also comprises aspects such as anti-carbonization, freeze-thaw-.Carbonization is meant airborne CO
2Impervious generates carbonate and water with its alkaline matter react with in concrete, the process that concrete basicity is reduced is called concrete carbonization, claims neutralisation again.The major cause that influences neutralisation has cement type, aggregate kind, adulterant, chemical admixture and proportioning etc.When W/C＞0.65, carbonization speed is very fast; When W/C＜0.40, carbonization is not carried out substantially.The experience of bank paddy filial piety one, W/C was less than 0.38 o'clock, and concrete carbonization speed approaches 0; Concrete is in moisture state, and carbonization does not take place under the outdoor environment substantially.The water-cement ratio of considering the ocean high performance concrete is lower, and therefore the anti-carbonation properties of anti-villaumite Portland cement concrete (PCC) can meet the demands.
It is the basic reason that the concrete getting up early freezes to cause structural damage that water freezing in the concrete expands.Free water is lower than 0 ℃ and just begins to freeze in the concrete, and the freezing point of pore water is lower than 0 ℃, and the aperture is thin more, and freezing point is low more, and the planar water freezing point is lower.The aquation combination water is non-icing under general subzero temperature.The free water content of the high performance concrete of anti-villaumite silicate cement preparation is very low, and therefore the anti-freezing property of anti-villaumite Portland cement concrete (PCC) also can satisfy the requirement of oceanographic engineering.
Prove through production practice: anti-villaumite silicate cement quality has that cost is low, the resisting chloride ion penetration performance is good, easy construction, the better characteristics of weather resistance.This technology finished product industrialization at present, by the Shanghai City new product evaluation, expert opinion thinks that " concrete slump loss of this product preparation is little; cohesiveness is good; do not have segregation, excreting water phenomenon; can satisfy pumping and concrete charge pass less than 1000 coulombs requirement, and good with the consistency of water reducer, by to grog C
3The control of the control of A technical indicator and the kind of mixed material and mix proportions makes the hydration heat of cement of production and concrete charge pass significantly be lower than Portland cement.Compare with the compound method of gelling material with oceanographic engineering in the past, the successful development of anti-villaumite silicate cement, the gelling material that ocean engineering concrete is used has had stable new cement type, can improve construction quality and speed of application, fill up the blank of domestic oceanographic engineering with special cement.”
The concrete technical indicator of this anti-villaumite silicate cement sees Table 6.
The quality of the anti-villaumite silicate cement of table 6
| Technical feature | Index | Measured value | Test method |
| Sulphur trioxide | ≯4.0％ | GB/T 176 | |
| Fineness | ≯5.0％ | 1.1 | GB/T 1345 |
| Time of coagulation | Initial set | ≮45min | 5:05 | GB/T 1346 | ||||||
| Final set | ≯10h | 6:25 | ||||||||
| Stability | Qualified (boiling process) | Qualified | ||||||||
| Intensity | 32.5 | 42.5 | Anti-villaumite silicate cement | GB/T 17671 | ||||||
| 3 days | 28 days | 3 days | 28 days | 3 days | 28 days | |||||
| Anti-folding | 2.0 | 6.0 | 2.5 | 7.0 | 2.8 | 7.8 | ||||
| Resistance to compression | 8.0 | 32.5 | 10.0 | 42.5 | 11.1 | 45.1 | ||||
| MgO | Cement | ≯6.0％ | 4.9％ | GB/T 175 | ||||||
| Grog | ≯5.0％ | 4.89％ | GB/T 1344 | |||||||
| Loss on ignition | ≯5.0％ | 1.6％ | GB/T 176 | |||||||
| Cement component | Total deviation | ≤2.0％ | 1.41 | GB/T 12960 | ||||||
| Cement | K≤1.0％ | +0.31 | ||||||||
| Breeze | K≤1.0％ | -0.85 | ||||||||
| Silica flour | K≤0.5％ | |||||||||
| Quick chlorion osmosis amount | ＜1000C | 731 | 801 | ASTM C 1202 | ||||||
| Hydration heat (J/g) | 32.5 | 42.5 | 32.5 | 42.5 | GB 2022 | |||||
| 3 days | 7 days | 3 days | 7 days | 3 days | 7 days | 3 days | 7 days | |||
| ≤ 180 | ≤ 230 | ≤ 230 | ≤ 270 | 161 | 184 | 190 | 234 | |||
| Chloride ion content | ≤0.02 | 0.012 | JC/T 420 | |||||||
ASTM C1202-97 and NT BUILD443 test are carried out in this test respectively.The test block of moulding φ 100 * 51mm, normal curing is carried out osmosis and spread coefficient test to regulation after the length of time.The concrete electric permeability test is tested by " standard test methods of concrete resistance of chloride ion penetration " (ASTM C1202-97).Chloride diffusion coefficient is undertaken by NT BUILD 443 methods.
In addition, we have also carried out the test of the performances such as workability of concrete, contraction, time of coagulation of anti-villaumite silicate cement, and the concrete of barren normal concrete and the preparation of anti-villaumite silicate cement is done a comparison.Simultaneously, also resist the physico chemical mechanics performance of villaumite silicate cement and the consistency of admixture and carried out experimental study.
Maritime concrete resisting chloride ion penetration diffustivity, workability and hydration heat are taken all factors into consideration, and according to the gelling material optimum principle, employing different components ratio and other composition have been prepared gelling material respectively and have been: A, B, C, D, E, F.Its proportioning is as shown in table 7.
Table 7 cement proportion (%)
| Cement | Slag powders | Silica flour | Gypsum | |
| A | 20 | 74 | 3 | 3 |
| B | 28 | 66.5 | 5 | 0.5 |
| C | 28 | 69 | 3 | - |
| D | 28.5 | 66.5 | 5 | - |
| E | 30 | 60 | 7 | 2 |
| F | 40 | 54 | 3 | 3 |
The concrete mix parameter is as follows:
Water-cement ratio: 0.35
Gel material content: 〉=400kg/m
3
The slump: 160mm
Sand coarse aggregate ratio: 0.37～0.41
Concrete mix is as shown in table 8.
Table 8 concrete mix (kg/m
3)
| Water | Gelling material | Sand | Stone | Water reducer |
| 154 | 440 | 725 | 1088 | 4.4～4.8 |
Table 9 is different age concrete compressive strength test results.6 compressive strength of specimens of different ingredients are adopted in numbering expression in the table, and test-results shows that mechanical performance of concrete that anti-villaumite silicate cement is prepared can satisfy the needs of oceanographic engineering fully, and these prescriptions can be prepared the above concrete of C40.
Table 9 mechanical performance of concrete
| Numbering | 7d(MPa) | 28d(MPa) |
| A | 35.1 | 39.1 |
| B | 40.5 | 46.0 |
| C | 40.8 | 45.7 |
| D | 54.3 | 59.4 |
| E | 45.5 | 53.5 |
| F | 45.2 | 55.5 |
The quick chlorion osmosis test-results of the cementitious material concrete of different proportionings is as shown in table 10.
The concrete chloride ion permeability test of table 10
| Numbering | 28d displacement flux (C) | 90d displacement flux (C) | 90d spread coefficient (m 2/s) |
| A | 955 | 478 | 1.81×10 -12 |
| B | 770 | 423 | 0.79×10 -12 |
| C | 889 | 449 | 0.61×10 -12 |
| D | 323 | 162 | 0.29×10 -12 |
| E | 930 | 383 | 0.93×10 -12 |
| F | 999 | 587 | 1.33×10 -12 |
To the evaluation of chlorion erosion-resisting characteristics, the most frequently used is with the quick coulometry method of U.S. ASTMC1202 both at home and abroad, as shown in table 11.
Table 11 displacement flux evaluation concrete resistance of chloride ion penetration
| The electric weight that passes through (C) | Chloride ion permeability | The electric weight that passes through (C) | Chloride ion permeability |
| ＞4000 | High | 100～1000 | Very low |
| 2000～4000 | In | ＜100 | Impermeable |
| 1000～2000 | Low | - | - |
The test-results of normal concrete is generally 2000～3000 coulombs, and when displacement flux reaches below 1000 coulombs, it is very low that concrete chloride ion permeability is considered to, and this concrete is considered to have high-durability.As can be seen from Table 10, concrete 28 days displacement fluxes of above-mentioned proportioning are all less than 1000 coulombs.
By a large amount of shop experiments, can learn that this cement can make the high performance concrete of the precenting chlorate corrosion of different intensity grades according to different durability Design requirements, formed strength grade and be series product such as 32.5 and 42.5.Simultaneously, it also has the characteristics of low hydration heat, three days the hydration heat of anti-villaumite cement of the used proportioning of Al is 151.3J/g, 7 days be 207.7 to be about 50% of Portland cement, significant to the Crack Control in the mass concrete construction process, be specially adapted to sea port dock, bridge spanning the sea and be subjected to the environment of chloride erosion.
Claims (9)
1. a silicate cement is characterized in that ratio of components is: grinding fine cement grog 20%～40%, levigate ground granulated blast furnace slag 54%～75%, silica flour 3%～10%, subsidiary material 0.3%～5%.
2. silicate cement as claimed in claim 1 is characterized in that levigate Portland clinker powder meets every index of stipulating among the JC/T853, and levigate to specific surface area 〉=350m
2/ kg, and C in the grog
3A≤8%, MgO≤5%, 28 day ultimate compression strength 〉=58MPa.
3. silicate cement as claimed in claim 2 is characterized in that the chemical constitution of levigate Portland clinker powder is: SiO
2Be 20%～21%, Fe
2O
3Be 4%～5%, Al
2O
3Be 5%～6%, CaO is 65.5%～66.5%, and MgO is 1%～2%.
4. silicate cement as claimed in claim 2 is characterized in that the mineral composition of levigate Portland clinker powder is: C
3S is 60%～64%, C
2S is 13%～15%, C
3A is 7%～10%, C
4AF is 14%～15%.
5. silicate cement as claimed in claim 1,28 days activity indexs that it is characterized in that levigate ground granulated blast furnace slag are greater than 95%, and surface-area 〉=400m
2/ kg.
6. silicate cement as claimed in claim 5 is characterized in that the chemical constitution of levigate ground granulated blast furnace slag comprises: SiO
2Be 39%～41%, Fe
2O
3Be 10%～12%, Al
2O
3Be 19%～21%, CaO is 24%～26%, and MgO is 0.9%～1%, SO
3Be 0.70%～1%, fCaO is 0.20%～1%.
7. silicate cement as claimed in claim 1,28 days activity indexs that it is characterized in that silica flour are greater than 85%, and specific surface area 〉=15000m
2/ kg.
8. silicate cement as claimed in claim 7 is characterized in that the chemical constitution of silica flour comprises: SiO
2Be 96%～98%, Fe
2O
3Be 0.50%～1%, Al
2O
3Be 0.10%～1%, CaO is 0.5%～1%, and MgO is 0.20%～1%.
9. silicate cement as claimed in claim 1 is characterized in that subsidiary material are gypsum.
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|---|---|---|---|
| CNB2005100265291A CN100453488C (en) | 2005-06-07 | 2005-06-07 | Silicate cement |
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|---|---|---|---|
| CNB2005100265291A CN100453488C (en) | 2005-06-07 | 2005-06-07 | Silicate cement |
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|---|---|
| CN1876593A true CN1876593A (en) | 2006-12-13 |
| CN100453488C CN100453488C (en) | 2009-01-21 |
Family
ID=37509183
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| CN102503194A (en) * | 2011-10-08 | 2012-06-20 | 丹东海工水泥有限公司 | Special composite cementitious material for high-grade concrete of bridge expansion joints and thin-shell structures |
| CN103214196A (en) * | 2013-04-03 | 2013-07-24 | 北方工业大学 | Novel cement composite |
| CN106045353A (en) * | 2016-05-31 | 2016-10-26 | 无锡锡能锅炉有限公司 | Cement for high-temperature-resistant gas boiler |
| CN109369040A (en) * | 2018-12-25 | 2019-02-22 | 福州大学 | A kind of novel compound cement |
| CN110204228A (en) * | 2019-06-06 | 2019-09-06 | 中国建筑材料科学研究总院有限公司 | The high low-heat portland cement and its preparation method and application of early strength |
| CN111825355A (en) * | 2019-09-12 | 2020-10-27 | 尧柏特种水泥技术研发有限公司 | Low-thixotropy oil well cement |
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| CN1009642B (en) * | 1987-06-26 | 1990-09-19 | 邯郸钢渣水泥厂 | Blast-furnace slag cement of quick setting behavior and high-early strength |
| CN1186782A (en) * | 1996-12-31 | 1998-07-08 | 龚春明 | Slag cement |
| CN1187473A (en) * | 1997-01-06 | 1998-07-15 | 郭茂胜 | Low-clinker high-early setting slag cement |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102503194A (en) * | 2011-10-08 | 2012-06-20 | 丹东海工水泥有限公司 | Special composite cementitious material for high-grade concrete of bridge expansion joints and thin-shell structures |
| CN102503194B (en) * | 2011-10-08 | 2013-06-19 | 丹东海工水泥有限公司 | Special composite cementitious material for high-grade concrete of bridge expansion joints and thin-shell structures |
| CN103214196A (en) * | 2013-04-03 | 2013-07-24 | 北方工业大学 | Novel cement composite |
| CN103214196B (en) * | 2013-04-03 | 2015-06-17 | 北方工业大学 | Novel cement composite |
| CN106045353A (en) * | 2016-05-31 | 2016-10-26 | 无锡锡能锅炉有限公司 | Cement for high-temperature-resistant gas boiler |
| CN106045353B (en) * | 2016-05-31 | 2018-12-07 | 无锡锡能锅炉有限公司 | High-temperature resistant gas boiler feed water mud |
| CN109369040A (en) * | 2018-12-25 | 2019-02-22 | 福州大学 | A kind of novel compound cement |
| CN109369040B (en) * | 2018-12-25 | 2021-11-02 | 福州大学 | Composite cement |
| CN110204228A (en) * | 2019-06-06 | 2019-09-06 | 中国建筑材料科学研究总院有限公司 | The high low-heat portland cement and its preparation method and application of early strength |
| CN111825355A (en) * | 2019-09-12 | 2020-10-27 | 尧柏特种水泥技术研发有限公司 | Low-thixotropy oil well cement |
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| CN100453488C (en) | 2009-01-21 |
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