CN1125207A - Special-purpose compound retardant water-reducing agent for sulplo-aluminate and ferro-aluminate cement concrete - Google Patents
Special-purpose compound retardant water-reducing agent for sulplo-aluminate and ferro-aluminate cement concrete Download PDFInfo
- Publication number
- CN1125207A CN1125207A CN 94119496 CN94119496A CN1125207A CN 1125207 A CN1125207 A CN 1125207A CN 94119496 CN94119496 CN 94119496 CN 94119496 A CN94119496 A CN 94119496A CN 1125207 A CN1125207 A CN 1125207A
- Authority
- CN
- China
- Prior art keywords
- water
- concrete
- reducing agent
- aluminate
- ferro
- 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
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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
- 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
- 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
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/20—Retarders
Abstract
The concrete admixture mainly used in preparation of sulpho-aluminate or ferro-aluminate cement concrete is made of 0-70% of high-effective water-reducing agent with water-reducing rate greater than 12%, 0-50% of general water-reducing agent with water-reducing rate of 5-12%, 1-30% of inorganic or organic weak acid or its salts, 20-60% of admixture carrier and 0-50% of salt. ADVANTAGE-. Can prolong the setting time and workable time of the concrete, improve the workability of the concrete and raise concrete strength and durability.
Description
The present invention relates to a kind of concrete admixture.Sulphur aluminium and ferro-aluminate cement were invented ferro-aluminate cement in nineteen eighty-two again on this basis by the invention of Chinese building material research institute in 1974.Two kinds of cement also are called Tr row cement, comprise early strong, expansion and self-stressing cement.Drop into after the suitability for industrialized production, self-stressing cement in the Tr row cement has obtained application in the production of self stressed pipe, but use early strong and expansive cement is confined to repair, part and some small-sized concrete members of combined bolting and shotcrete, winter building construction, and range of application is narrower.Wherein most important reason is exactly that cement setting time causes the workability of concrete can't satisfy the constructing operation requirement too soon.Simultaneously, because site operation often adopts the method that increases water cement ratio to prolong construction operation time, therefore although sulphur aluminium and ferro-aluminate cement cement mortar strength are very high, the intensity of concrete is unsatisfactory, and water cement ratio is too high also can produce adverse influence to the weather resistance of concrete.Although some engineerings have adopted the admixture of some single varieties, do not address these problems at all.Therefore sulphur aluminium and ferro-aluminate cement are never used in civil engineering work on a large scale.
The objective of the invention is to develop a kind of compound retardant water-reducing agent, make its with sulphur aluminium with after the ferro-aluminate cement mix becomes concrete, guarantee constructing operation and the operating time of new mixed concrete in dissimilar engineerings, and improve morning, later strength and the weather resistance of sclerosis concrete.
The present invention is that 5～12% ordinary water-reducing agent, inorganic or organic monoacid or salt, Concrete Additive carrier and the salt that can reduce freezing point etc. drop into ball mill or puddle to stir in the device by formula rate and get final product with high efficiency water reducing agent, the water-reducing rate of water-reducing rate＞12%.Prescription of the present invention is:
The high efficiency water reducing agent 0～70% of water-reducing rate＞12%
Water-reducing rate is 5～12% ordinary water-reducing agent 0～50%
Inorganic, organic monoacid or its esters 1～30%
Concrete Additive carrier 20～60%
Salt 0～50%
Mix the salt that can reduce freezing point in the present invention and can be mixed with the anti-freeze type retardation water reducing agent.
Embodiment one:
Adopting water-reducing rate is that 18% water reducer 36.7%, water-reducing rate are that 10% water reducer 8%, monobasic inorganic weak acid 16.7%, carrier 38.6% are mixed with admixture of the present invention, be used to produce large-sized prestress concrete member (striding beam for 32 meters) and cast in situs high-grade concrete (C60 concrete) afterwards the slump-loss of concrete see Table one.
Table one:
| Water cement ratio | The slump (cm) | ||||||
| Go out machine | 15 minutes | 30 minutes | 45 clocks | 60 minutes | 75 minutes | 90 minutes | |
| ??0.37 | ???20 | ???16 | ????14 | ???12 | ???12.5 | ??10.5 | ????8 |
Embodiment two:
Adopting water-reducing rate is that 18% water reducer 26.7%, water-reducing rate are that 10% water reducer 13.3%, monobasic inorganic weak acid 26.7%, carrier 33.3% are mixed with admixture of the present invention, after being used to prepare the Commercial Concrete of remote transportation pumping construction, the slump-loss and the ultimate compression strength of concrete see Table two.
Table two:
| The slump (cm) | Ultimate compression strength (MPa) | ||||||
| Go out machine | 1 hour | 2 hours | 3 hours | 1 day | 3 days | 7 days | 28 days |
| ?24.6 | ???24.5 | ??22.5 | ??22.9 | ??35.1 | ??47.6 | ??49.1 | ??55.1 |
Embodiment three:
Adopting water-reducing rate is that 18% water reducer 12.5%, water-reducing rate are that 10% water reducer 3%, monobasic inorganic weak acid 2%, nitrite 50%, carrier 32.5% are mixed with admixture of the present invention, when being used for preparing winter high grade and low grade concrete and constructing, can carry out under the condition of the lowest temperature-20 ℃, the subzero temperature intensity of this concrete sees Table three.
Table three:
| Water cement ratio | The slump (cm) | Subzero temperature intensity (10～-15 ℃) MPa | |||
| ????R—7 | ??R－7＋3 | ?R－7＋28 | ??R—7＋56 | ||
| ??0.34 | ?????9.0 | ????3.6 | ????43.7 | ????58.5 | ????70.4 |
The present invention and sulphur aluminium and ferrous aluminate cement mixed preparing concrete are applied to have in all kinds of engineerings advantages such as setting time and the operable time that prolongs concrete, the workability of improving concrete, the intensity that improves concrete and durability.
Claims (1)
- A kind of sulphur aluminium and ferro-aluminate cement concrete specific complex retardation water reducing agent, it is characterized in that: the prescription of described compound retardant water-reducing agent is:The high efficiency water reducing agent 0～70% of water-reducing rate＞12%Water-reducing rate is 5～12% ordinary water-reducing agent 0～50%Inorganic, organic monoacid or its esters 1～30%Concrete Additive carrier 20～60%Salt 0～50%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119496 CN1125207A (en) | 1994-12-22 | 1994-12-22 | Special-purpose compound retardant water-reducing agent for sulplo-aluminate and ferro-aluminate cement concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94119496 CN1125207A (en) | 1994-12-22 | 1994-12-22 | Special-purpose compound retardant water-reducing agent for sulplo-aluminate and ferro-aluminate cement concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1125207A true CN1125207A (en) | 1996-06-26 |
Family
ID=5039265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94119496 Pending CN1125207A (en) | 1994-12-22 | 1994-12-22 | Special-purpose compound retardant water-reducing agent for sulplo-aluminate and ferro-aluminate cement concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1125207A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002098817A1 (en) * | 2001-06-02 | 2002-12-12 | Henkel Kommanditgesellschaft Auf Aktien | Plaster retarder |
-
1994
- 1994-12-22 CN CN 94119496 patent/CN1125207A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002098817A1 (en) * | 2001-06-02 | 2002-12-12 | Henkel Kommanditgesellschaft Auf Aktien | Plaster retarder |
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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 |