CN1107125A - Early strengthening agent for concrete - Google Patents
Early strengthening agent for concrete Download PDFInfo
- Publication number
- CN1107125A CN1107125A CN 94106404 CN94106404A CN1107125A CN 1107125 A CN1107125 A CN 1107125A CN 94106404 CN94106404 CN 94106404 CN 94106404 A CN94106404 A CN 94106404A CN 1107125 A CN1107125 A CN 1107125A
- Authority
- CN
- China
- Prior art keywords
- powder
- cement
- early strength
- anhydrous calcium
- calcium sulphoaluminate
- 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
- 238000005728 strengthening Methods 0.000 title description 2
- 239000000843 powder Substances 0.000 claims abstract description 20
- 239000004568 cement Substances 0.000 claims abstract description 18
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 229910052602 gypsum Inorganic materials 0.000 claims abstract description 10
- 239000010440 gypsum Substances 0.000 claims abstract description 10
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims abstract description 7
- 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 claims abstract description 6
- GRLPQNLYRHEGIJ-UHFFFAOYSA-J potassium aluminium sulfate Chemical compound [Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O GRLPQNLYRHEGIJ-UHFFFAOYSA-J 0.000 claims abstract description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 17
- 239000011575 calcium Substances 0.000 claims description 17
- 229910052791 calcium Inorganic materials 0.000 claims description 17
- 239000003638 chemical reducing agent Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 2
- 229940103272 aluminum potassium sulfate Drugs 0.000 claims description 2
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 229910021653 sulphate ion Inorganic materials 0.000 claims description 2
- 238000002425 crystallisation Methods 0.000 claims 1
- 230000008025 crystallization Effects 0.000 claims 1
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical class [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 abstract description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 abstract 3
- 229910052708 sodium Inorganic materials 0.000 abstract 3
- 239000011734 sodium Substances 0.000 abstract 3
- 150000003839 salts Chemical class 0.000 description 4
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 150000004683 dihydrates Chemical class 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 235000017550 sodium carbonate Nutrition 0.000 description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 1
- 235000019739 Dicalciumphosphate Nutrition 0.000 description 1
- 206010027336 Menstruation delayed Diseases 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 239000001506 calcium phosphate Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- NEFBYIFKOOEVPA-UHFFFAOYSA-K dicalcium phosphate Chemical compound [Ca+2].[Ca+2].[O-]P([O-])([O-])=O NEFBYIFKOOEVPA-UHFFFAOYSA-K 0.000 description 1
- 229940038472 dicalcium phosphate Drugs 0.000 description 1
- 229910000390 dicalcium phosphate Inorganic materials 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 229910001653 ettringite Inorganic materials 0.000 description 1
- NVVZQXQBYZPMLJ-UHFFFAOYSA-N formaldehyde;naphthalene-1-sulfonic acid Chemical compound O=C.C1=CC=C2C(S(=O)(=O)O)=CC=CC2=C1 NVVZQXQBYZPMLJ-UHFFFAOYSA-N 0.000 description 1
- 229910000360 iron(III) sulfate Inorganic materials 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229940095064 tartrate Drugs 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
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
-
- 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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0068—Ingredients with a function or property not provided for elsewhere in C04B2103/00
Abstract
The characteristic of high early strenth agent lies in that it essentially contains (1) unhydrous sodium thioaluminate powder, the dosage is 4-10% of the substituted cement weight, (2)gypsum powder the dosage is 0-3.0% of the substituted cement weight, (3) aluminium sulfate salt or ferric sulfate salt or potassium aluminium sulfate, the dosage is 1-5% of the total weight of cement, anhydrous sodium thioaluminate powder and gypsum powder, (4) anhydrous sodium carbonate, its dosage is 0.5-3.0% of the total weight of cement, anhydrous sodium thioaluminate powder and gypsum powder, the remainder is proper amount of dewatering agent and retardant. While it improves the early (within one day) strength it also improves the later stage strength and permeation resistance.
Description
A kind of concrete early strength agent belongs to concrete admixture manufacturing technology field.
General hardening accelerator all adopts the yellow soda ash of U.S. Pat .4444593 proposition and composition or the yellow soda ash of Japanese Patent JP.6005050 proposition and the composition of Tai-Ace S 150 of ferric sulfate, its common drawback is: after they are mixed concrete, when improving early stage (in one day) intensity, promptly reduced its intensity of 28 days, thereby made its impervious decline.
The object of the present invention is to provide a kind of concrete early strength agent that can improve early stage (in one day) intensity and 28 days intensity simultaneously.
The invention is characterized in: it contains in essence:
(1) anhydrous calcium sulphoaluminate (3CaO3Al
2O
3CaSO
4) powder, its fineness is 300～2000m
2/ Kg, consumption is for replacing 4～10% of cement weight;
(2) gypsum (CaSO
42H
2O, or CaSO
41/2H
2O, or CaSO
4) powder, its fineness is 300～2000m
2/ Kg, consumption is for replacing 0～3.0% of cement weight;
(3) aluminum sulfate salt or sulphate of iron or aluminum potassium sulfate, consumption be cement, anhydrous calcium sulphoaluminate powder and terra alba total amount 1～5%;
(4) anhydrous sodium carbonate, its consumption are 0.5～3.0% of cement, anhydrous calcium sulphoaluminate powder and terra alba total amount.
All the other are an amount of water reducer and retardant.Water reducer can be high efficiency water reducing agent such as the naphthalenesulfonic acid-formaldehyde condensate (NF) that accounts for cement, anhydrous calcium sulphoaluminate powder and gypsum total amount 0～1.0%, also account for the ordinary water-reducing agent such as the calcium lignin sulphonate (wooden calcium) of cement, anhydrous calcium sulphoaluminate powder and terra alba total amount 0～0.5%, the also mixture of said two devices, its content adds and is worth for both.Retardant can be used citric acid (or its salt) or tartrate (or its salt), or boric acid (or its salt), or phosphoric acid (or its salt), and its consumption is 0～0.2% of cement, anhydrous calcium sulphoaluminate powder and a terra alba total amount.
Use proof: this concrete early strength agent both can improve early strength also can improve intensity in late period.
Embodiment:
The anhydrous calcium sulphoaluminate powder that the present invention adopts can by bauxitic clay, Wingdale and dihydrate gypsum by the common grinding of suitable proportion after 1350 ℃ of calcinings, cooling afterwards grindings make, it contains anhydrous calcium sulphoaluminate 80%, all the other are Dicalcium Phosphate (Feed Grade), fineness is 300～2000m
2/ Kg.Terra alba is a dihydrate gypsum, and fineness is 300～2000m
2/ Kg.Vitriol by contain crystal water vitriol drying, partial dehydration forms.Need only during preparation above composition is mixed.It mix stir into concrete in the various cement after, both can improve early strength, can improve later strength and barrier properties again.
Following table 1 is an embodiment, and table 2 is its implementation results.
By above-mentioned two watches as can be known: the concrete early strength agent that the present invention proposes have condense fast, early strength is high, later strength is also high and impervious good advantage.This be since anhydrous calcium sulphoaluminate and gypsum be incorporated in hydrated cementitious the time generate aquation calcium sulphoaluminate (ettringite) thus improved early strength, concrete real density, later strength and impermeability.It can be widely used in road repairing, normal temperature and give among the quick form removal of system concrete member, underground project waterproof concrete, the emergency work.
Table 1:
Table 2:
| Prescription | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| The slump (mm) | 38 | 37 | 39 | 44 | 41 | 35 | 40 |
| Initial set (h) | 1.6 | 2.5 | 1.8 | 2.0 | 3.1 | 1.5 | 6 |
| Final set (h) | 2.8 | 5.0 | 3.1 | 3.4 | 5.9 | 3.1 | 11 |
| 6 hours intensity (N/mm 2) | 3.6 | 3.1 | 3.9 | 3.7 | 2.9 | 4.1 | 0 |
| 1 day intensity (N/mm 2) | 6.5 | 6.3 | 6.9 | 6.2 | 5.9 | 6.8 | 2.9 |
| 3 days intensity (N/mm 2) | 18.5 | 18.2 | 18.8 | 18.4 | 17.8 | 18.6 | 9.2 |
| 7 days intensity (N/mm 2) | 26.1 | 25.3 | 27.0 | 26.6 | 26.1 | 26.9 | 18.5 |
| 28 days intensity (N/mm 2) | 35.1 | 36.0 | 34.6 | 34.8 | 35.9 | 35.0 | 33.7 |
| Anti-penetration grade | ＞S 35 | ＞S 35 | ＞S 35 | ＞S 35 | ＞S 35 | ＞S 35 | S 8 |
Claims (6)
1, a kind of concrete early strength agent, it is characterized in that: it contains in essence:
(1) anhydrous calcium sulphoaluminate (3CaO3Al
2O
3CaSO
4) powder, its fineness is 300～2000m
2/ Kg, consumption is for replacing 4～10% of cement weight;
(2) gypsum (CaSO
42H
2O, or CaSO
41/2H
2O, or CaSO
4) powder, its fineness is 300～2000m
2/ Kg, consumption is for replacing 0～3.0% of cement weight;
(3) aluminum sulfate salt, its crystallization water yield is 0～30%, consumption be cement, anhydrous calcium sulphoaluminate powder and terra alba total amount 1～5%;
(4) anhydrous sodium carbonate, its consumption are 0.5～3.0% of cement, anhydrous calcium sulphoaluminate powder and terra alba total amount.
All the other are an amount of water reducer and retardant.
2, concrete early strength agent according to claim 1 is characterized in that: described aluminum sulfate salt can be sulphate of iron and replaces.
3, concrete early strength agent according to claim 1 is characterized in that: described aluminum sulfate salt can be aluminum potassium sulfate and replaces.
4, concrete early strength agent according to claim 1 is characterized in that: described water reducer is the high efficiency water reducing agent that accounts for cement, anhydrous calcium sulphoaluminate powder and gypsum total amount 0～1.0%.
5, concrete early strength agent according to claim 1 is characterized in that: described water reducer is the ordinary water-reducing agent that accounts for cement, anhydrous calcium sulphoaluminate powder and terra alba total amount 0～0.5%.
6, concrete early strength agent according to claim 1 is characterized in that: described water reducer also can be the mixture of efficient and ordinary water-reducing agent, and its content adds and value for both.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106404 CN1107125A (en) | 1994-06-17 | 1994-06-17 | Early strengthening agent for concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106404 CN1107125A (en) | 1994-06-17 | 1994-06-17 | Early strengthening agent for concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1107125A true CN1107125A (en) | 1995-08-23 |
Family
ID=5032547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94106404 Pending CN1107125A (en) | 1994-06-17 | 1994-06-17 | Early strengthening agent for concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1107125A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329336C (en) * | 2005-09-06 | 2007-08-01 | 梅县五彩涂料厂 | Cement early strength agent and its prepn |
| CN102295439A (en) * | 2010-06-25 | 2011-12-28 | 丁颖 | Quick-hardening high-strength concrete additive for ore |
| CN104761165A (en) * | 2015-03-23 | 2015-07-08 | 苏州市德莱尔建材科技有限公司 | Composite portland cement and preparation method thereof |
| CN105084799A (en) * | 2015-08-14 | 2015-11-25 | 盐城工学院 | Cement early-strength admixture and preparation method thereof |
| CN106365488A (en) * | 2016-08-16 | 2017-02-01 | 长安大学 | Early-strength accelerator for cement |
| CN108249845A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of Organic-inorganic composite early strength agent and the self-compacting concrete prepared using the early strength agent |
| CN108751765A (en) * | 2018-07-16 | 2018-11-06 | 东南大学 | A kind of phosphate cement retarder and its application method |
| CN112062494A (en) * | 2020-09-16 | 2020-12-11 | 天津炬实科技发展股份有限公司 | Inorganic mineral reinforcing agent |
| CN114804768A (en) * | 2022-04-29 | 2022-07-29 | 中建八局第二建设有限公司 | High-crack-resistance track concrete and preparation method and application thereof |
-
1994
- 1994-06-17 CN CN 94106404 patent/CN1107125A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1329336C (en) * | 2005-09-06 | 2007-08-01 | 梅县五彩涂料厂 | Cement early strength agent and its prepn |
| CN102295439A (en) * | 2010-06-25 | 2011-12-28 | 丁颖 | Quick-hardening high-strength concrete additive for ore |
| CN102295439B (en) * | 2010-06-25 | 2012-12-19 | 丁颖 | Quick-hardening high-strength concrete additive for ore |
| CN104761165A (en) * | 2015-03-23 | 2015-07-08 | 苏州市德莱尔建材科技有限公司 | Composite portland cement and preparation method thereof |
| CN105084799B (en) * | 2015-08-14 | 2017-03-08 | 盐城工学院 | A kind of cement early strength agent and preparation method thereof |
| CN105084799A (en) * | 2015-08-14 | 2015-11-25 | 盐城工学院 | Cement early-strength admixture and preparation method thereof |
| CN106365488A (en) * | 2016-08-16 | 2017-02-01 | 长安大学 | Early-strength accelerator for cement |
| CN108249845A (en) * | 2017-12-13 | 2018-07-06 | 镇江建科建设科技有限公司 | A kind of Organic-inorganic composite early strength agent and the self-compacting concrete prepared using the early strength agent |
| CN108751765A (en) * | 2018-07-16 | 2018-11-06 | 东南大学 | A kind of phosphate cement retarder and its application method |
| CN108751765B (en) * | 2018-07-16 | 2020-10-02 | 东南大学 | Phosphate cement retarder and using method thereof |
| CN112062494A (en) * | 2020-09-16 | 2020-12-11 | 天津炬实科技发展股份有限公司 | Inorganic mineral reinforcing agent |
| CN114804768A (en) * | 2022-04-29 | 2022-07-29 | 中建八局第二建设有限公司 | High-crack-resistance track concrete and preparation method and application thereof |
| CN114804768B (en) * | 2022-04-29 | 2023-05-23 | 中建八局第二建设有限公司 | High-crack-resistance pavement concrete and preparation method and application thereof |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |