CN102399069A - Modified efficient aliphatic water reducing agent and preparation method thereof - Google Patents
Modified efficient aliphatic water reducing agent and preparation method thereof Download PDFInfo
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- CN102399069A CN102399069A CN2010102787969A CN201010278796A CN102399069A CN 102399069 A CN102399069 A CN 102399069A CN 2010102787969 A CN2010102787969 A CN 2010102787969A CN 201010278796 A CN201010278796 A CN 201010278796A CN 102399069 A CN102399069 A CN 102399069A
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- reducing agent
- water reducing
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- formaldehyde
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Abstract
The invention discloses a modified efficient aliphatic water reducing agent and a preparation method thereof, and relates to a building material. The modified efficient aliphatic water reducing agent comprises the following components, by weight, 6-8.5 parts of sodium pyrosulfite, 7-10 parts of acetone, 2.5-5 parts of sodium hydroxide, 24-27 parts of formaldehyde, 1-2 parts of high-pigment carbon black and 46.5-53.5 parts of water. The modified efficient aliphatic water reducing agent and the preparation method thereof have the following advantages that: 1, compared to the conventional concrete, the prepared concrete by the modified efficient aliphatic water reducing agent does not show any difference before initial setting or after final setting; 2, the water reducing rate can be increased by 2-3%, after the modified efficient aliphatic water reducing agent is added to the concrete, the concrete wrapping is good, and the workability is substantially improved; 3, during the production process, the heat energy released from the combination production of the raw material formula is adopted to carry out heating so as to achieve the purpose of energy saving, and reduce the cost.
Description
Technical field
The present invention relates to material of construction, especially a kind of modified aliphatic high efficiency water reducing agent and preparation method of adding when being used for concrete for making.
Background technology
Cement water reducing agent is an important composition composition in the high performance concrete.Aliphatic high-efficiency water reducing agent in the market adds in the concrete, and concrete workability is relatively poor, and particularly this product colour takes on a red color, and mixes in the concrete, and concrete pale yellow or light brown can occur at the initial set front surface, and unit in charge of construction is usually bigger to this suggestion; Simultaneously aliphatic high-efficiency water reducing agent is in synthetic production process, and most producers adopt heating to produce, and energy consumption is bigger, is unfavorable for cost control, and also the theme with the energy-saving and emission-reduction of the world today is out of step.
Summary of the invention
It is a kind of both without coal, electricity, gas heat temperature raising that the object of the invention provides, and improves the modified aliphatic high efficiency water reducing agent and the preparation method of water-reducing rate.
Technical scheme that the object of the invention adopts is, is made up of Sodium Pyrosulfite, acetone, sodium hydroxide, formaldehyde, high-carbon black pigment, water, and it is formed by weight being:
Sodium Pyrosulfite 6-8.5 part
Acetone 7-10 part
Sodium hydroxide 2.5-5 part
Formaldehyde 24-27 part
High-carbon black pigment 1-2 part
Water 46.5-53.5.
Preparing method's step of the present invention is following:
A. after in the reaction kettle still that water 46.5-53.5 part is pumped into chuck layer, whisking appliance, temperature measurer, drop into again in Sodium Pyrosulfite 6-8.5 part reaction kettle still, start whisking appliance, churning time 30 minutes;
B. and then by weight with acetone 7-10 part, progressively pump in the reaction kettle still in limiting 60 minutes, stir simultaneously;
C. by weight again sodium hydroxide 2.5-5 part being dropped in the reaction kettle, stirred 30 minutes, reactor temperature begins to rise; Open inlet valve, discharging water gets into the reacting kettle jacketing layer, and reactor temperature is controlled at 60 ℃; In 120 minutes, slowly splash into formaldehyde 24-27 part, stir simultaneously;
D. after dripping off formaldehyde, the reaction kettle temperature in the kettle is controlled at 76 ℃-80 ℃, at last with high-carbon black pigment 1-2 part; Drop in the reaction kettle, stir simultaneously, and the reaction kettle temperature in the kettle is controlled at 70 ℃-73 ℃; Be incubated after 2.5 hours, progressively be cooled to normal temperature, promptly obtain this product.
Its performance of the present invention is superior to conventional aliphatic high-efficiency water reducing agent; Advantage exists: 1. color is a dark brown red; With other high efficiency water reducing agents, retardant, slump retaining agent composite after; Composite product is a brownish black, no matter before the concrete initial set that this product of usefulness is processed, or has no difference with conventional concrete after the final set.2. water-reducing rate can improve 2-3%, adds in the concrete, and concrete parcel is fine, and workability increases substantially.3. in the production process, the heat that only need utilize the formula for raw stock combinations produce to discharge heats up, and has reached purpose of energy saving, has reduced cost.
Embodiment
Further specify the present invention below in conjunction with embodiment.
It is formed by weight being:
Sodium Pyrosulfite 62kg
Acetone 80kg
Sodium hydroxide 27kg
Formaldehyde 250kg
High-carbon black pigment 13kg
Water 500kg.
Its preparation methods steps is following:
A. by weight water 500kg being pumped in the reaction kettle of chuck layer, whisking appliance, temperature measurer, drop into again in the technical grade Sodium Pyrosulfite 62kg reaction kettle still, stirred 30 minutes;
B. again with technical grade acetone 80kg, pumped in the reaction kettle still, stir simultaneously at 60 minutes.
C. be that 99% sodium hydroxide 27kg drops in the reaction kettle still with purity then; And stirred 30 minutes, this moment, the reaction kettle temperature in the kettle rose, and opened inlet valve; Discharge water and get in the reaction kettle in the chuck layer; The reaction kettle temperature in the kettle is controlled in 60 ℃, and in 120 minutes, slowly splashing into content is the formaldehyde 250kg of 37% technical grade, ceaselessly stirs simultaneously;
D. after dripping off formaldehyde; The reaction kettle temperature in the kettle is controlled between 76 ℃-80 ℃, drops at last in the high-carbon black pigment 13kg reaction kettle still, does not stop to stir; Make the reaction kettle temperature in the kettle between 70 ℃-73 ℃; Be incubated 2.5 hours, progressively be cooled to normal temperature, will obtain this product at last and get in the pond, product stock pond.
With conventional concentration be 33% liquid aliphatic family high efficiency water reducing agent as A, be that 33% liquid modifying aliphatic high-efficiency water reducing agent is B with concentration of the present invention, carry out the concrete simultaneous test, press the GB8076-2008 standard, it is examined concrete performance index such as table 1.
Table 1 is examined concrete performance index and is contrasted
Being examined concrete performance index and can be found out from test; The water-reducing rate of modified aliphatic high efficiency water reducing agent of the present invention is higher than conventional aliphatic high-efficiency water reducing agent 2---and 3%; Qinshui rate and air content descend relatively; Intensity increases, and concrete shrinkage further improves, and is little to concrete influence time of coagulation.
Claims (2)
1. a modified aliphatic high efficiency water reducing agent is made up of Sodium Pyrosulfite, acetone, sodium hydroxide, formaldehyde, high-carbon black pigment, water, it is characterized in that forming by weight being:
Sodium Pyrosulfite 6-8.5 part
Acetone 7-10 part
Sodium hydroxide 2.5-5 part
Formaldehyde 24-27 part
High-carbon black pigment 1-2 part
Water 46.5-53.5.
2. modified aliphatic high efficiency water reducing agent preparation method is characterized in that preparing method's step is following:
A. after in the reaction kettle still that water 46.5-53.5 part is pumped into chuck layer, whisking appliance, temperature measurer, drop into again in Sodium Pyrosulfite 6-8.5 part reaction kettle still, start whisking appliance, churning time 30 minutes;
B. and then by weight with acetone 7-10 part, progressively pump in the reaction kettle still in limiting 60 minutes, stir simultaneously;
C. by weight again sodium hydroxide 2.5-5 part being dropped in the reaction kettle, stirred 30 minutes, reactor temperature begins to rise; Open inlet valve, discharging water gets into the reacting kettle jacketing layer, and reactor temperature is controlled at 60 ℃; In 120 minutes, slowly splash into formaldehyde 24-27 part, stir simultaneously;
D. after dripping off formaldehyde, the reaction kettle temperature in the kettle is controlled at 76 ℃-80 ℃, at last with high-carbon black pigment 1-2 part; Drop in the reaction kettle, stir simultaneously, and the reaction kettle temperature in the kettle is controlled at 70 ℃-73 ℃; Be incubated after 2.5 hours, progressively be cooled to normal temperature, promptly obtain this product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102787969A CN102399069A (en) | 2010-09-10 | 2010-09-10 | Modified efficient aliphatic water reducing agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102787969A CN102399069A (en) | 2010-09-10 | 2010-09-10 | Modified efficient aliphatic water reducing agent and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102399069A true CN102399069A (en) | 2012-04-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2010102787969A Pending CN102399069A (en) | 2010-09-10 | 2010-09-10 | Modified efficient aliphatic water reducing agent and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103553400A (en) * | 2013-10-16 | 2014-02-05 | 北京新奥混凝土集团有限公司 | Recycled concrete aggregate modifier and preparation method thereof |
| CN103570268A (en) * | 2012-07-25 | 2014-02-12 | 天津滨海新区庚海精细化工有限公司 | Preparation technology for concrete water reducer |
| CN112608058A (en) * | 2020-12-03 | 2021-04-06 | 科之杰新材料集团浙江有限公司 | Concrete micro-foaming agent and preparation method thereof |
-
2010
- 2010-09-10 CN CN2010102787969A patent/CN102399069A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570268A (en) * | 2012-07-25 | 2014-02-12 | 天津滨海新区庚海精细化工有限公司 | Preparation technology for concrete water reducer |
| CN103553400A (en) * | 2013-10-16 | 2014-02-05 | 北京新奥混凝土集团有限公司 | Recycled concrete aggregate modifier and preparation method thereof |
| CN112608058A (en) * | 2020-12-03 | 2021-04-06 | 科之杰新材料集团浙江有限公司 | Concrete micro-foaming agent and preparation method thereof |
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Application publication date: 20120404 |