CN1068558A - Aluminium sulfate expanding agent and manufacture method thereof - Google Patents
Aluminium sulfate expanding agent and manufacture method thereof Download PDFInfo
- Publication number
- CN1068558A CN1068558A CN 92105187 CN92105187A CN1068558A CN 1068558 A CN1068558 A CN 1068558A CN 92105187 CN92105187 CN 92105187 CN 92105187 A CN92105187 A CN 92105187A CN 1068558 A CN1068558 A CN 1068558A
- Authority
- CN
- China
- Prior art keywords
- cement
- expanding agent
- aluminium sulfate
- concrete
- mortar
- 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.)
- Pending
Links
- 239000003795 chemical substances by application Substances 0.000 title claims abstract description 24
- 229910000329 aluminium sulfate Inorganic materials 0.000 title claims abstract description 17
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical compound [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 title claims abstract description 17
- 235000011128 aluminium sulphate Nutrition 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title abstract description 6
- 238000004519 manufacturing process Methods 0.000 title abstract description 4
- 239000004568 cement Substances 0.000 claims abstract description 24
- 239000004567 concrete Substances 0.000 claims abstract description 15
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 12
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011575 calcium Substances 0.000 claims abstract description 8
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 8
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 238000005336 cracking Methods 0.000 claims abstract description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 5
- 239000010440 gypsum Substances 0.000 claims description 5
- 239000011398 Portland cement Substances 0.000 claims description 4
- 150000004683 dihydrates Chemical class 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000000227 grinding Methods 0.000 abstract description 6
- 239000002994 raw material Substances 0.000 abstract description 6
- 230000008961 swelling Effects 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract 1
- 229910052934 alunite Inorganic materials 0.000 description 4
- 239000010424 alunite Substances 0.000 description 4
- 229910001653 ettringite Inorganic materials 0.000 description 4
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 description 4
- 239000000470 constituent Substances 0.000 description 3
- 238000001354 calcination Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000036571 hydration Effects 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000005526 G1 to G0 transition Effects 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 239000003082 abrasive agent Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000004067 bulking agent Substances 0.000 description 1
- JGIATAMCQXIDNZ-UHFFFAOYSA-N calcium sulfide Chemical compound [Ca]=S JGIATAMCQXIDNZ-UHFFFAOYSA-N 0.000 description 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004078 waterproofing Methods 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
- 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
- C04B28/06—Aluminous cements
- C04B28/065—Calcium aluminosulfate cements, e.g. cements hydrating into ettringite
-
- 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
- C04B22/00—Use of inorganic materials as active ingredients for mortars, concrete or artificial stone, e.g. accelerators, shrinkage compensating agents
- C04B22/008—Cement and like inorganic materials added as expanding or shrinkage compensating ingredients in mortar or concrete compositions, the expansion being the result of a recrystallisation
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
A kind of cement, concrete aluminium sulfate expanding agent and manufacture method thereof are by 10～60% calcium sulphoaluminate cement clinker, 10～60% natural alumstone, 30～80% natural dehydrated gyp-, and common grinding to specific surface area is 250～330m
2/ kg forms.When preparation concrete or mortar, mix 6～14% this swelling agents, be prepared into expansive concrete or mortar, can improve cement, concrete intensity, constitute the thing of building of anti-permeation cracking-resistant, increase volume, can also prepare self-stressing concrete or mortar.Raw materials cost is lower, and swell increment is moderate, is easy to apply.
Description
The present invention is a kind of concrete or mortar expansion agent, mixes a certain amount of energy and produce certain volumetric expansion in concrete or mortar, improves the waterproofing and anti-leakage ability, and can gain in strength.
Close with the present invention have sulplo-aluminate self-stressing cement, sulphoaluminate expander, alumite plumping agent and a Chinese patent 85107101.The sulplo-aluminate self-stressing cement is formed by calcium sulphoaluminate grog and the common grinding of dihydrate gypsum, and the speed of expansion of this cement is fast, produces bigger self-stress value, often is used to make the self-stressing cement penstock.Sulphoaluminate expander (CSA) is by levigate the forming of bright sulfur calcium aluminate abrasive material, because its hydration rate is exceedingly fast, swell increment is big, and play a role at short notice, stationary phase, its volume must strictly be controlled about 14 days, otherwise caused the strength degradation of cement stone easily; Again owing to Al in this swelling agent
2O
3Content is more, when aquation generates ettringite, and SO
3The content relative deficiency, therefore expansion component wherein is not fully utilized.Alumite plumping agent is formed by natural (or calcining) alunite and gypsum combined grinding, because the dissolution rate of alunite is slower, its speed that generates ettringite is relatively slow, therefore the early expansion amount is little, expansion stable period is longer, obtain big slightly swell increment, must increase its volume, this will influence concrete intensity; And wherein too high K
2O, Na
2O content will produce alkali-aggregate reaction, influences concrete weather resistance.Chinese patent 85107101 bulking agent of calcium aluminate are formed by luminite cement grog, dihydrate gypsum, natural alumstone constituent grinding, and raw materials cost is expensive, and swell increment is less than normal, when volume for a long time, bigger to strength of cement influence.
In view of the foregoing, the purpose of this invention is to provide a kind of aluminium sulfate expanding agent and manufacture method thereof, and have that raw materials cost is low, volume is little to the strength of cement influence.
The object of the present invention is achieved like this: the raw-material weight composition is: 10～60% calcium sulphoaluminate cement clinker, 10～60% natural alumstone, 30～80% dehydrated gyp-.With above-mentioned constituent grinding to specific surface area 250～330m
2/ kg just can be made into aluminium sulfate expanding agent.When stirring system concrete or mortar, the aluminium sulfate expanding agent of adding 6～14%, place of cement weight, promptly can be made into water conservancy project and build thing with anti-permeation cracking-resistant effect, also can replace expansion and self-stressing cement to prepare expansive concrete or mortar, can improve volume and can make self-stressing concrete or mortar according to using needs to regulate swell value arbitrarily again.
In the hydration and hardening process of Portland cement and aluminium sulfate expanding agent, aluminosulfate cement can generate ettringite with the dehydrated gyp-effect as quick as thought, at first play the intensity skeleton function at the aquation initial stage, and produce bulking effect, then along with the continuation of aquation, alunite and dehydrated gyp-reaction generate ettringite, make hardened cement paste continue to produce and expand, under constraint condition, it is fine and close that concrete or mortar structure are tending towards, improve intensity, finally reach the purpose of compensate for shrinkage, anti-permeation cracking-resistant.The calcium sulphoaluminate grog is formed by the calcining of low-grade alumina raw, and cost is lower, and dehydrated gyp-and alunite are natural matter, and price is very cheap, and therefore, the raw materials cost of this swelling agent is lower, hold susceptible to user acceptance, can be in numerous applications.
Be a specific embodiment of the present invention below:
Best form (%) of table 1 aluminium sulfate expanding agent
| The calcium sulphoaluminate cement clinker | Natural alumstone | Natural dehydrated gyp- |
| 20 | 30 | 50 |
Three kinds of common grindings of constituent are to specific surface area 295m
2/ kg.
Natural dehydrated gyp-also can replace with dihydrate gypsum.
The physical property test of allocating in Portland cement behind the aluminium sulfate expanding agent the results are shown in table 3.
Table 2
| Raw material Chemical Composition (%) | Aluminium sulfate expanding agent | |||
| Title | The calcium sulphoaluminate cement clinker | Natural alumstone | Natural dehydrated gyp- | Optimum chemical composition (%) |
| nnn | 17.34 | 4.53 | 7.47 | |
| SiO 2 | 12.67 | 49.36 | 1.93 | 18.35 |
| Al 2O 3 | 26.92 | 18.31 | 0.21 | 10.98 |
| CaO | 46.51 | 0.90 | 39.15 | 29.05 |
| Fe 20 3 | 2.84 | 1.39 | 0.06 | 1.03 |
| MgO | 1.23 | 0.13 | 1.65 | 1.01 |
| TiO 2 | 1.16 | 0.20 | ||
| So 3 | 6.51 | 16.76 | 50.63 | 31.36 |
| K 2O | 4.64 | 1.33 | ||
| Na 2O | 0.37 | 0.10 | ||
| Σ | 97.84 | 109.20 | 98.16 | 100.88 |
Table 3 mixes cement properties performance behind the aluminium sulfate expanding agent
| Numbering | Expansive agent dosage (%) | Ultimate compression strength | Folding strength | ||||
| 3 days | 7 days | 28 days | 3 days | 7 days | 28 days | ||
| S-0 | 0 | 19.3 | 32.0 | 49.8 | 4.0 | 5.5 | 7.8 |
| S-6 | 6 | 23.3 | 30.9 | 52.3 | 4.4 | 6.1 | 8.6 |
| S-8 | 8 | 20.4 | 31.1 | 50.2 | 3.6 | 5.4 | 8.0 |
| S-10 | 10 | 18.5 | 29.4 | 50.8 | 3.4 | 4.5 | 7.4 |
| S-12 | 12 | 15.1 | 22.0 | 46.7 | 2.9 | 4.1 | 7.0 |
Annotate: undertaken by GB177-85 " the strength of cement mortar method of inspection ".
Table 3(is continuous)
| Numbering | Volume (%) | Clean slurry free expansion value (%) | Mortar self-stress value (MPa) | ||||||
| 3 days | 7 days | 14 days | 28 days | 3 days | 7 days | 14 days | 28 days | ||
| S-0 | 0 | 0.036 | 0.043 | 0.050 | 0.063 | 0.14 | 0.21 | 0.38 | 0.36 |
| S-6 | 6 | 0.099 | 0.119 | 0.140 | 0.158 | 0.41 | 0.51 | 0.59 | 0.56 |
| S-8 | 8 | 0.124 | 0.173 | 0.221 | 0.254 | ||||
| S-10 | 10 | 0.137 | 0.220 | 0.309 | 0.417 | 0.63 | 1.00 | 1.09 | 1.11 |
| S-12 | 12 | 0.150 | 0.254 | 0.445 | 0.742 | ||||
Test-results shows: in Portland cement, mix 6～10% aluminium sulfate expanding agent, the performance index of cement are unaffected, can make expansive concrete or mortar, produce the self-stress value of 0.5～1.1MPa, reach anticracking, impervious purpose.
Claims (4)
1, a kind of aluminium sulfate expanding agent, it is characterized in that forming by its weight is 10～60% calcium sulphoaluminate cement clinker, 10～60% natural alumstone, 30～80% dehydrated gyp-.
2, aluminium sulfate expanding agent according to claim 1 is characterized in that by its weight best composition be 20% calcium sulphoaluminate cement clinker, 30% natural alumstone, 50% dehydrated gyp-.
3, aluminium sulfate expanding agent according to claim 1 and 2 is characterized in that described dehydrated gyp-also can use dihydrate gypsum.
4, a kind of aluminium sulfate expanding agent, it is characterized in that: in Portland cement, add 6～14% aluminium sulfate expanding agent, place of cement weight can be made into the thing of building with anti-permeation cracking-resistant effect, also can replace expansion and self-stressing cement to prepare expansive concrete or mortar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105187 CN1068558A (en) | 1992-07-11 | 1992-07-11 | Aluminium sulfate expanding agent and manufacture method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92105187 CN1068558A (en) | 1992-07-11 | 1992-07-11 | Aluminium sulfate expanding agent and manufacture method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1068558A true CN1068558A (en) | 1993-02-03 |
Family
ID=4941211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92105187 Pending CN1068558A (en) | 1992-07-11 | 1992-07-11 | Aluminium sulfate expanding agent and manufacture method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1068558A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040741C (en) * | 1994-01-28 | 1998-11-18 | 石家庄市特种水泥厂 | High-efficiency concrete expansion admixture and preparing process thereof |
| CN1101794C (en) * | 2000-03-06 | 2003-02-19 | 李志刚 | Expansion concrete and low-alkali high-efficiency concrete sweller |
| CN102219430A (en) * | 2011-04-08 | 2011-10-19 | 衡阳市山王建材实业有限责任公司 | High performance concrete inorganic environmental waterproof expanding agent and preparation method thereof |
| CN102336533A (en) * | 2011-06-28 | 2012-02-01 | 金树青 | Alunite concrete expanding agent |
| CN104529215A (en) * | 2014-12-17 | 2015-04-22 | 武汉三源特种建材有限责任公司 | Phosphogypsum expanding agent and preparation method thereof |
| US10947159B2 (en) * | 2019-03-21 | 2021-03-16 | Tangshan Polar Bear Building Materials Co., Ltd. | Granulated blast-furnace slag activator, its manufacturing method thereof, and manufacturing method of cement |
| CN114014578A (en) * | 2021-11-25 | 2022-02-08 | 中建商品混凝土有限公司 | Expanding agent based on industrial waste and preparation method thereof |
-
1992
- 1992-07-11 CN CN 92105187 patent/CN1068558A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040741C (en) * | 1994-01-28 | 1998-11-18 | 石家庄市特种水泥厂 | High-efficiency concrete expansion admixture and preparing process thereof |
| CN1101794C (en) * | 2000-03-06 | 2003-02-19 | 李志刚 | Expansion concrete and low-alkali high-efficiency concrete sweller |
| CN102219430A (en) * | 2011-04-08 | 2011-10-19 | 衡阳市山王建材实业有限责任公司 | High performance concrete inorganic environmental waterproof expanding agent and preparation method thereof |
| CN102336533A (en) * | 2011-06-28 | 2012-02-01 | 金树青 | Alunite concrete expanding agent |
| CN104529215A (en) * | 2014-12-17 | 2015-04-22 | 武汉三源特种建材有限责任公司 | Phosphogypsum expanding agent and preparation method thereof |
| US10947159B2 (en) * | 2019-03-21 | 2021-03-16 | Tangshan Polar Bear Building Materials Co., Ltd. | Granulated blast-furnace slag activator, its manufacturing method thereof, and manufacturing method of cement |
| CN114014578A (en) * | 2021-11-25 | 2022-02-08 | 中建商品混凝土有限公司 | Expanding agent based on industrial waste and preparation method thereof |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |