CN1063160C - High-early strength low-heat micro-expansion cement - Google Patents
High-early strength low-heat micro-expansion cement Download PDFInfo
- Publication number
- CN1063160C CN1063160C CN97111069A CN97111069A CN1063160C CN 1063160 C CN1063160 C CN 1063160C CN 97111069 A CN97111069 A CN 97111069A CN 97111069 A CN97111069 A CN 97111069A CN 1063160 C CN1063160 C CN 1063160C
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- CN
- China
- Prior art keywords
- cement
- expansion
- early strength
- heat
- lime
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000004568 cement Substances 0.000 title claims abstract description 58
- 239000002893 slag Substances 0.000 claims abstract description 17
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 13
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 13
- 239000004571 lime Substances 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 11
- 239000010440 gypsum Substances 0.000 claims abstract description 11
- AKEJUJNQAAGONA-UHFFFAOYSA-N sulfur trioxide Chemical compound O=S(=O)=O AKEJUJNQAAGONA-UHFFFAOYSA-N 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 5
- 238000002360 preparation method Methods 0.000 claims description 4
- 230000036571 hydration Effects 0.000 abstract description 11
- 238000006703 hydration reaction Methods 0.000 abstract description 11
- 239000004567 concrete Substances 0.000 abstract description 10
- 239000011398 Portland cement Substances 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 abstract description 5
- 239000000463 material Substances 0.000 abstract description 4
- 229910021653 sulphate ion Inorganic materials 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract 1
- 238000005260 corrosion Methods 0.000 abstract 1
- 238000003801 milling Methods 0.000 abstract 1
- 230000002742 anti-folding effect Effects 0.000 description 11
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 239000003469 silicate cement Substances 0.000 description 5
- 230000015271 coagulation Effects 0.000 description 4
- 238000005345 coagulation Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 238000010348 incorporation Methods 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000002075 main ingredient Substances 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 1
- 235000017491 Bambusa tulda Nutrition 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000006071 cream Substances 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C04B7/21—Mixtures thereof with other inorganic cementitious materials or other activators with calcium sulfate containing activators
-
- 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
- C04B28/08—Slag cements
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention discloses cement with high and early strength, low heat and micro expansion, which belongs to sulfate cement. The cement uses granulated blast furnace slag as main materials, the content of SO3 in the cement is from 4% to 9% by adding gypsum, 1% to 20% of Portland cement clinker or 0.5% to 6% of lime is added, and the cement is prepared by milling the mixed materials into materials with the specific surface areas which are larger than or equal to 5000 square centimeters /g. The strength index of the cement is better than that of CB2938-82 cement with less heat and micro expansion, and the cement can reach the requirement of CB 2938-82 even if the indexes of the hydration heat and the expansion rate of the cement are higher than those of 425 grade cement. The cement is especially suitable for concrete engineering requiring less hydration heat or less compensation retraction, and leak and sulphate corrosion resisting engineering.
Description
The present invention relates to a kind of hydraulic cementing materials, particularly is the sulfate cement of raw material with granulated blast-furnace slag, gypsum, Portland clinker or lime.
In the prior art, State Standard of the People's Republic of China GB2938-82 has issued a kind of " low ".It belongs to the category of Portland blast.It is a main ingredient with the granulated blast-furnace slag, adds that an amount of Portland clinker and gypsum are levigate to be made.This cement is in order there to be low hydration heat, and the volume that must make grog is few and fine slag contents is many; For higher rate of expansion is arranged, also must make fine slag contents many, this is simultaneously few and sulfur trioxide content is many with regard to making the grog volume.But grog has lacked can make the strength of cement that makes reduce the requirement that does not reach 325 labels and 425 labels; When grog was very few, cement stone surface can not be put to practicality through playing powder, dusting after a while.
Task of the present invention is based on standard GB 2938-82, develops a kind of its label and early strength is higher, hydration heat is lower, rate of expansion is bigger high-early strength low-heat micro-expansion cement.
Task of the present invention is finished like this: it also is main ingredient with the granulated blast-furnace slag, adds an amount of gypsum, an amount of Portland clinker or lime is levigate makes; By the per-cent of raw material gross weight, the gypsum of adding makes the sulphur trioxide (SO in the cement
3) be 4-9%, be preferably 5-8%, the add-on of Portland clinker is 1-20%, is preferably 1-10%, perhaps uses the lime of 0.5-6% (being preferably 0.5-3%) to replace Portland clinker, all the other are granulated blast-furnace slag; The specific surface area of levigate back gained cement needs more than or equal to 5000cm
2/ g, more preferably greater than or equal 6000cm
2/ g; When levigate, can be with various component combined grindings, also can be with various components grindings respectively, preferably earlier slag and Portland clinker or lime to be gone into levigately, gypsum is gone into levigate separately, at last the two mixing.The specific surface area of cement is reached till the requirement, and must connect with many grinding machines more than 2 or 2 and carry out grindings.
Because the present invention is controlled at gypsum component and Portland clinker in the raw material or lime components contents within the suitable scope, the specific surface area that particularly will make cement is controlled at 6000cm
2More than/the g, thereby strength of cement is greatly improved, thereby can mix grog less, mix slag (also improving sulfur trioxide content simultaneously adapts to it) more, like this, the label of cement can improve, hydration heat can reduce, rate of expansion can increase, and early strength (3 days intensity) improves a lot, this intensity index equates with 3 days intensity indexs of the silicate cement of the middle regulation of GB175-92 " silicate cement, ordinary Portland cement ", know by aftermentioned table 1, can reach the desired value of 725R silicate cement, can reach early strong and high-strength.And the low among the GB2938-82 should not be listed, thereby it not had the requirement of 3 days intensity indexs because 3 days intensity is too low, has only 7 days and the requirement of 28 days intensity indexs; And have only 325 labels and two grades of 425 labels, and strength of cement index of the present invention can reach the requirement of 525R, 625R even 725R label.
Be elaborated with embodiment and testing data below.
By weight percentage, 81 parts of slags, 19 parts of gypsum and 5 parts of cement clinkers being made specific surface area by above-mentioned best grinding mode is 5200cm
2The cement of/g.In addition 85 parts of slags, 15 parts of gypsum and 5 parts of cement clinkers being made specific surface area by above-mentioned best grinding mode is 6386cm
2The cement of/g, measure their intensity, stability, hydration heat and rate of expansion and list in table 1, table 2 and table 3 respectively:
Table 1
| Embodiment | Proportioning | Intensity (MPa) | Time of coagulation (time: divide) | Light is qualitative | Specific surface area (cm 2/g) | ||||||
| Mineral water stone SO 3+ mud+ripe amount slag charge cream % | 3 days | 7 days | 28 days | ||||||||
| Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Just | Eventually | ||||
| 1 | 81+5+19(7.3) | 39.8 | 5.7 | 56.4 | 6.97 | 74.3 | 7.5 | 1:00 | 3:05 | Qualified | 5200 |
| 2 | 85+5+15(5.8) | 38.1 | 5.3 | 51.4 | 6.10 | 67.8 | 7.6 | 3:07 | 6:13 | Qualified | 6386 |
Table 2
| Embodiment | Minute/hydration heat (J/G) | Remarks | |||
| 0-24 hour | 0-48 hour | 0-3 days | 0-7 days | ||
| 1 | 148.14 | 163.73 | 168 | 170 | Cement mark 625R |
| 2 | |||||
| The index of GB2938-82 | 175.8 | 196.8 | Cement mark 425R | ||
Table 3
| Embodiment | Cement and expanded rate (%) | ||
| 1 day | 7 days | 28 days | |
| 1 | 0.0535 | 0.12 | 0.43 |
| 2 | |||
| The index of GB2938-82 | ＞0.05 | ＞0.1 | ＜0.50 |
By table 2 and table 3 as can be known, even its hydration heat of cement of the present invention and rate of expansion under the situation of high grade (625R), also can guarantee to reach the index request of GB2938-82.
Because the incorporation of the Portland clinker of cement of the present invention is few, thereby the volume stability of cement of the present invention is good, stability 100% is qualified once going out to grind.Because the grog volume is few, also causes the moisture resistivity of cement of the present invention better, can be by table 4 witness.
Table 4
Cement of the present invention is because ultra-fine mill, and specific surface area is big, and hydrated cementitious is fast, and the grout colloidality is big, thereby bleeding lacks than silicate cement, by table 5 as seen.
Table 5
Because the rate of expansion of cement of the present invention is bigger, and big to metal protection, thereby the concrete of making is bigger than ordinary Portland cement with the bond stress of reinforcing bar, by table 6 as seen.
Table 6
In the table, the age of concrete, intensity rate was the ratio of the concrete strength of cement of the present invention and the concrete strength of ordinary Portland cement, and concrete and steel bamboo trunk bond stress ratio in the length of time are the ratio of the bond stress of the concrete of the bond stress of the concrete of cement of the present invention and reinforcing bar and ordinary Portland cement and reinforcing bar.
Table 7 has been listed different acid salt cement grog volume and different SO respectively with table 8
3Content is to the influence of strength of cement.
Table 7
| Embodiment | Portland clinker incorporation (% weight) | Intensity (MPa) | Time of coagulation (time: divide) | Stability | Specific surface area (cm 2/g) | SO in the cement 3 (％) | ||||||
| 3 days | 7 days | 28 days | ||||||||||
| Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Just | Eventually | |||||
| 6 | 10 | 40.9 | 6.4 | 52.1 | 7.3 | 66.1 | 7.9 | 2:00 | 5:28 | √ | 6342 | 6.55 |
| 7 | 7 | 43.3 | 6.8 | 54.3 | 7.3 | 69.2 | 7.97 | 2:25 | 4:08 | √ | 6417 | 6.55 |
| 8 | 5 | 41.1 | 6.0 | 52.4 | 7.3 | 66.2 | 7.5 | 2:21 | 3:58 | √ | 6527 | 6.55 |
| 9 | 3 | 41.3 | 6.0 | 53.5 | 7.2 | 66.8 | 7.6 | 2:03 | 4:18 | √ | 6611 | 6.55 |
| 10 | 1 | 37.2 | 5.6 | 51.6 | 7 | 69.8 | 7.5 | 2:00 | 3:40 | √ | 6298 | 6.55 |
| 11 | 15 | 20.5 | 3.0 | 38.8 | 5.9 | 57.8 | 6.5 | - | - | √ | 5818 | 5.8 |
| 12 | 20 | 35.8 | 5.7 | 48.7 | 6.7 | 63.8 | 7.4 | - | - | √ | 5677 | 5.8 |
| Embodiment | Hydration heat (J/g) | Rate of expansion (%) | Conclusion | |||
| 3 days | 7 days | 1 day | 7 days | 28 days | Intensity is closed requirement, but hydration heat, rate of expansion are nonconforming | |
| 11 | 177.9 | 197 | 0.042 | 0.08 | 0.37 | |
| 12 | 187.8 | 205.2 | 0.03 | 0.062 | 0.32 | |
Table 8
| Embodiment | SO in the cement 3% weight | Intensity (MPa) | Time of coagulation (time: divide) | Stability | Specific surface area (cm 2/g) | ||||||
| 3 days | 7 days | 28 days | |||||||||
| Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Just | Eventually | ||||
| 13 | 7.98 | 13.4 | 2.8 | 32 | 4.8 | 50.2 | 5.2 | 5:55 | 9:31 | √ | 6399 |
| 14 | 7.22 | 14.3 | 2.9 | 32.2 | 5 | 51.4 | 5.5 | 5:55 | 9:22 | √ | 6569 |
| 15 | 6.46 | 13.2 | 2.8 | 32.3 | 5 | 50.8 | 5.6 | 5:42 | 10:13 | √ | 6671 |
| 16 | 5.7 | 14.7 | 2.78 | 31.8 | 5 | 52 | 6.1 | 5:25 | 8:54 | √ | 6386 |
In the sample of table 8, do not contain silicate cement grog or lime in the feed composition.
In the present invention, grog is as the alkali-activator of slag lateral reactivity, and gypsum is as the sulphate activation agent of slag lateral reactivity, and strength of cement is from slag, thereby available lime replaces Portland clinker as feed composition.As shown in Table 9, lime intermingled quantity is preferably 0.5-6%, is good with 0.5-3%.
Table 9
| Embodiment | Lime incorporation (% weight) | Intensity (MPa) | SO in the cement 3Content (%) | Time of coagulation (time: divide) | Stability | Specific surface area (cm 2/g) | ||||
| 3 days | 7 days | |||||||||
| Resistance to compression | Anti-folding | Resistance to compression | Anti-folding | Just | Eventually | |||||
| 17 | 8 | 21.9 | 5.0 | 32.1 | 7.7 | 6.55 | 3:16 | 5:15 | √ | 5677 |
| 18 | 6 | 26.8 | 5.5 | 34.6 | 7.3 | 6.55 | 3:35 | 5:10 | √ | 6456 |
| 19 | 4 | 31.4 | 6.8 | 36.5 | 8.3 | 6.55 | 3:35 | 5:05 | √ | 5818 |
| 20 | 2 | 41.1 | 7.6 | 54.3 | 9.15 | 6.55 | 3:15 | 4:45 | √ | 6275 |
| 21 | 1 | 38.6 | 6.5 | 54.4 | 7.43 | 6.55 | 3:07 | 6:13 | √ | 6121 |
| 22 | 0.5 | 32.8 | 5.8 | 52.1 | 6.5 | 6.55 | 3:00 | 5:55 | √ | 5836 |
In sum, because the present invention is controlled at the consumption of various raw material components within the suitable scope, and the specific area of product cement is controlled on the suitable height, thereby cement of the present invention namely has early strong low-heat micro-expansion characteristics, be particularly suitable for requiring than the mass concrete engineering of low hydration heat and require the concrete works of compensate for shrinkage, also be applicable to require impervious and engineering resisting erosion of sulfate.
Claims (4)
1, a kind of high-early strength low-heat micro-expansion cement; form by granulated blast-furnace slag, gypsum, Portland clinker or lime; it is characterized in that: by raw material weight per-cent; sulfur trioxide content is 4-9% in the cement; Portland clinker content is 1-20%; or replace Portland clinker with the lime of 0.5-6%, and surplus is a granulated blast-furnace slag, the specific surface area of levigate back cement is more than or equal to 5000cm
2/ g.
2, according to the preparation method of the said high-early strength low-heat micro-expansion cement of claim 1, it is characterized in that: sulfur trioxide content is 5-8% in the cement, and Portland clinker content is 1-10%, and cement specific surface area is more than or equal to 6000cm
2/ g.
3, according to the preparation method of the described high-early strength low-heat micro-expansion cement of claim 1, it is characterized in that: sulfur trioxide content is 5-8% in the cement, and lime content is 0.5-3%, and cement specific surface area is more than or equal to 6000cm
2/ g.
4, the preparation method of the described high-early strength low-heat micro-expansion cement of claim 1 is characterized in that: with two or two above grinding machine series connection carrying out grindings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111069A CN1063160C (en) | 1997-06-04 | 1997-06-04 | High-early strength low-heat micro-expansion cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97111069A CN1063160C (en) | 1997-06-04 | 1997-06-04 | High-early strength low-heat micro-expansion cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1201020A CN1201020A (en) | 1998-12-09 |
| CN1063160C true CN1063160C (en) | 2001-03-14 |
Family
ID=5171633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97111069A Expired - Fee Related CN1063160C (en) | 1997-06-04 | 1997-06-04 | High-early strength low-heat micro-expansion cement |
Country Status (1)
| Country | Link |
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| CN (1) | CN1063160C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| HUP0301285A3 (en) * | 2000-10-05 | 2004-05-28 | Ko Suz Chung | Slag cement |
| CN100441537C (en) * | 2005-11-25 | 2008-12-10 | 华南理工大学 | A Portland cement resistant to chlorine salt erosion |
| CN102482149A (en) * | 2009-10-01 | 2012-05-30 | 韩国铁道技术研究院 | Heavy Concrete Compositions Using Slag By-Products |
| CN103833243A (en) * | 2014-01-09 | 2014-06-04 | 山东黄金矿业(莱州)有限公司焦家金矿 | Slag-based whole tailing gravity-flow filling cementing material and filling slurry preparation method thereof |
| CN109399976A (en) * | 2018-12-18 | 2019-03-01 | 武汉理工大学 | A kind of roadbase fluidized bed combustion coal ash/slag slow setting micro-expansion cement and preparation method thereof |
| CN116986873B (en) * | 2023-08-09 | 2025-09-02 | 衢州圣效商品混凝土有限公司 | A preparation method of low-heat micro-expansion concrete |
-
1997
- 1997-06-04 CN CN97111069A patent/CN1063160C/en not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| 《胶凝材料学》 1980.6.1 中国建筑工业出版社 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1201020A (en) | 1998-12-09 |
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