CN107698188B - Reinforced pumping agent for concrete - Google Patents
Reinforced pumping agent for concrete Download PDFInfo
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- CN107698188B CN107698188B CN201711117937.7A CN201711117937A CN107698188B CN 107698188 B CN107698188 B CN 107698188B CN 201711117937 A CN201711117937 A CN 201711117937A CN 107698188 B CN107698188 B CN 107698188B
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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
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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
- 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
- C04B28/04—Portland 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
- C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
- C04B2111/00034—Physico-chemical characteristics of the mixtures
- C04B2111/00146—Sprayable or pumpable mixtures
Abstract
A reinforced pumping agent for concrete is prepared by the following steps: firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 20-30 parts of magnesium aluminum silicate, 5-10 parts of bentonite, 3-5 parts of dihydroxy polydimethylsiloxane, 2-5 parts of maleic anhydride, 1-2 parts of tetramethyl divinyl disilazane and 20-30 parts of durene; according to the invention, after the concrete added with the reinforced pumping agent is used, the slurry uniformity is improved, the viscosity is reduced, the flowing speed of the slurry is increased, the suspension property of the aggregate in the concrete is enhanced, the bottom sinking phenomenon does not occur in a long time, the aggregate is more uniformly wrapped by the slurry, and the rheological agent improves the slurry fluidity.
Description
Technical Field
The invention relates to a concrete reinforcing pumping aid, and belongs to the field of concrete.
Background
Concrete pumping agents are also one of concrete admixtures. It is defined as: an additive for improving the pumping performance of concrete mixture. With the development of commercial concrete, the concrete pumping agent is increasingly highlighted. The existing method has no obvious improvement on the homogeneity of concrete, and is difficult to accurately control the pumping of long-distance concrete, so that the success rate of the continuous pumping construction of the concrete is very low, and the pumping distance is short. The mechanical property of the concrete is difficult to ensure.
Disclosure of Invention
In order to solve the problems of pumping aid materials in the prior art, the invention provides a reinforced pumping aid for concrete and a manufacturing method thereof, so as to solve the technical problems.
A reinforced pumping agent for concrete is prepared by the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 20-30 parts of magnesium aluminum silicate, 5-10 parts of bentonite, 3-5 parts of dihydroxy polydimethylsiloxane, 2-5 parts of maleic anhydride, 1-2 parts of tetramethyl divinyl disilazane and 20-30 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
100 parts of the prepared rheological agent, 30-40 parts of calcium saccharate and 50-60 parts of silica sol are added into a mixing stirrer to be uniformly stirred, 5-10 parts of dipropyl maleate and 2-5 parts of perfluorooctyltriethoxysilane are added into the mixing stirrer to be uniformly stirred, and 5-10 parts of hydroxypropyl starch ether is added to be uniformly mixed, so that the pumping aid is obtained.
A preparation method of a reinforced pumping agent for concrete comprises the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 20-30 parts of magnesium aluminum silicate, 5-10 parts of bentonite, 3-5 parts of dihydroxy polydimethylsiloxane, 2-5 parts of maleic anhydride, 1-2 parts of tetramethyl divinyl disilazane and 20-30 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
100 parts of the prepared rheological agent, 30-40 parts of calcium saccharate and 50-60 parts of silica sol are added into a mixing stirrer to be uniformly stirred, 5-10 parts of dipropyl maleate and 2-5 parts of perfluorooctyltriethoxysilane are added into the mixing stirrer to be uniformly stirred, and 5-10 parts of hydroxypropyl starch ether is added to be uniformly mixed, so that the pumping aid is obtained.
The reinforced pumping aid for concrete is put into a ball mill for ball milling for 30 minutes. The ball milling speed is 500 r/min.
The particle size of the reinforcing pumping aid for concrete after ball milling reaches 300 microns.
The reinforced pumping aid for concrete is heated and stirred in a water bath at 50 ℃ for 30 minutes to form a suspension mixed solution.
The reinforcing pumping aid for concrete comprises the following raw materials in parts by weight: 30 parts of magnesium aluminum silicate, 10 parts of bentonite, 3 parts of dihydroxy polydimethylsiloxane, 2 parts of maleic anhydride, 2 parts of tetramethyl divinyl disilazane and 25 parts of durene.
The reinforcing pumping aid for concrete is prepared by adding maleic anhydride, adjusting the pH value to 5, putting the mixed solution into a reaction kettle, and controlling the stirring speed at 100 r/min.
The reinforcing pumping aid for concrete comprises the following rheological agents: sugar calcium: silica sol: dipropyl maleate: perfluorooctyltriethoxysilane: the proportion of hydroxypropyl starch ether is 100: 35: 60: 6: 3: 5.
the concrete added with the reinforced pumping aid comprises the following raw materials in parts by weight: 10-20 parts of portland cement, 3-5 parts of fly ash, 2-3 parts of silica fume, 10-20 parts of natural sand, 15-20 parts of gravel, 2-4 parts of a reinforcing pumping aid, 0.5-1 part of a water reducing agent and 5-10 parts of water.
The concrete comprises the following raw materials in parts by weight: 20 parts of portland cement, 5 parts of fly ash, 2 parts of silica fume, 16 parts of natural sand, 18 parts of broken stone, 3 parts of a reinforcing pumping aid, 0.5 part of a water reducing agent and 8 parts of water.
According to the invention, after the concrete added with the enhanced pumping agent is used, the slurry uniformity is improved, the viscosity is reduced, the flowing speed of the slurry is increased, the suspension property of the aggregate in the concrete is enhanced, the phenomenon of bottom sinking does not occur in a long time, so that the aggregate is wrapped by the slurry more uniformly, the slurry fluidity is improved by the aid of the rheological agent, the mixture has the properties of smooth passing through a conveying pipeline, no blockage, no segregation and good viscoplasticity, a certain amount of uniformly distributed small bubbles can exist in the concrete due to the enhanced pumping agent, the internal friction of the concrete can be reduced by the aid of the small bubbles, and the pumping resistance is reduced.
Detailed Description
Concrete test sample performance parameters added with enhanced pumping agent
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | |
| Initial slump spread | 250/640 | 255/640 | 250/635 | 245/645 | 250/640 |
| 2 hours slump spread | 230/590 | 235/595 | 235/585 | 225/590 | 230/595 |
| Initial slump lossCylinder time | 2.3 | 2.5 | 2.5 | 2.4 | 2.3 |
| 2 hours slump rewinding time | 5.3 | 5.1 | 5.3 | 5.0 | 5.0 |
| 28 days compressive strength MPa | 73 | 72 | 76 | 72 | 75 |
Example 1
A reinforced pumping agent for concrete and a manufacturing method thereof are disclosed, wherein the preparation method comprises the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 21 parts of magnesium aluminum silicate, 7 parts of bentonite, 3 parts of dihydroxy polydimethylsiloxane, 5 parts of maleic anhydride, 2 parts of tetramethyl divinyl disilazane and 25 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
100 parts of the rheological agent prepared by the weight part, 33 parts of sugar calcium and 56 parts of silica sol are added into a mixing stirrer to be uniformly stirred, 6 parts of dipropyl maleate and 2 parts of perfluorooctyltriethoxysilane are added into the mixing stirrer to be uniformly stirred, 7 parts of hydroxypropyl starch ether are added to be uniformly mixed, and then the reinforcing pumping aid is obtained,
the concrete added with the reinforced pumping aid comprises the following raw materials in parts by weight: 12 parts of Portland cement, 3 parts of fly ash, 2 parts of silica fume, 14 parts of natural sand, 17 parts of broken stone, 2 parts of a pumping enhancer, 0.5 part of a water reducing agent and 9 parts of water, and the raw materials are uniformly mixed to obtain the concrete added with the pumping enhancer.
Example 2
A reinforced pumping agent for concrete and a manufacturing method thereof are disclosed, wherein the preparation method comprises the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 27 parts of magnesium aluminum silicate, 5 parts of bentonite, 4 parts of dihydroxy polydimethylsiloxane, 3 parts of maleic anhydride, 2 parts of tetramethyl divinyl disilazane and 23 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
adding 100 parts by weight of the prepared rheological agent, 31 parts by weight of calcium saccharate and 58 parts by weight of silica sol into a mixing stirrer, uniformly stirring, adding 8 parts by weight of dipropyl maleate and 4 parts by weight of perfluorooctyltriethoxysilane into the mixing stirrer, uniformly stirring, adding 7 parts by weight of hydroxypropyl starch ether, uniformly mixing to obtain the enhanced pumping aid,
the concrete added with the reinforced pumping aid comprises the following raw materials in parts by weight: 18 parts of Portland cement, 5 parts of fly ash, 2 parts of silica fume, 19 parts of natural sand, 20 parts of broken stone, 4 parts of a pumping enhancing agent, 1 part of a water reducing agent and 8 parts of water, and the raw materials are uniformly mixed to obtain the concrete added with the pumping enhancing agent.
Example 3
A reinforced pumping agent for concrete and a manufacturing method thereof are disclosed, wherein the preparation method comprises the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 24 parts of magnesium aluminum silicate, 8 parts of bentonite, 5 parts of dihydroxy polydimethylsiloxane, 2 parts of maleic anhydride, 2 parts of tetramethyl divinyl disilazane and 25 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
adding 100 parts by weight of the prepared rheological agent, 33 parts by weight of calcium saccharate and 52 parts by weight of silica sol into a mixing stirrer, uniformly stirring, adding 6 parts by weight of dipropyl maleate and 4 parts by weight of perfluorooctyltriethoxysilane into the mixing stirrer, uniformly stirring, adding 9 parts by weight of hydroxypropyl starch ether, uniformly mixing to obtain the enhanced pumping aid,
the concrete added with the reinforced pumping aid comprises the following raw materials in parts by weight: 17 parts of portland cement, 3 parts of fly ash, 2 parts of silica fume, 17 parts of natural sand, 18 parts of broken stone, 2 parts of a pumping enhancer, 0.5 part of a water reducing agent and 10 parts of water are uniformly mixed to obtain the concrete added with the pumping enhancer.
Example 4
A reinforced pumping agent for concrete and a manufacturing method thereof are disclosed, wherein the preparation method comprises the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 23 parts of magnesium aluminum silicate, 5 parts of bentonite, 5 parts of dihydroxy polydimethylsiloxane, 3 parts of maleic anhydride, 1 part of tetramethyl divinyl disilazane and 21 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
100 parts of the rheological agent prepared by the weight part, 32 parts of sugar calcium and 54 parts of silica sol are added into a mixing stirrer to be uniformly stirred, 8 parts of dipropyl maleate and 3 parts of perfluorooctyltriethoxysilane are added into the mixing stirrer to be uniformly stirred, 7 parts of hydroxypropyl starch ether is added to be uniformly mixed, and then the reinforcing pumping aid is obtained,
the concrete added with the reinforced pumping aid comprises the following raw materials in parts by weight: 16 parts of portland cement, 5 parts of fly ash, 3 parts of silica fume, 10 parts of natural sand, 15 parts of broken stone, 2 parts of a reinforcing pumping aid, 1 part of a water reducing agent and 5 parts of water, and the raw materials are uniformly mixed to obtain the concrete added with the reinforcing pumping aid.
Example 5
A reinforced pumping agent for concrete and a manufacturing method thereof are disclosed, wherein the preparation method comprises the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 24 parts of magnesium aluminum silicate, 6 parts of bentonite, 5 parts of dihydroxy polydimethylsiloxane, 4 parts of maleic anhydride, 1 part of tetramethyl divinyl disilazane and 28 parts of durene; weighing magnesium aluminum silicate and bentonite, mixing the mixture evenly, putting the mixture into a ball mill for ball milling, wherein the ball milling time is 30-50 minutes, the ball milling speed is about 400-600r/min, the granularity after ball milling reaches 200-300 microns, adding tetramethyl divinyl disilazane and durene, mixing the mixture by vibration of a vibrator, heating and stirring the mixture in a water bath at 50-55 ℃ for 20-40 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, adding dihydroxy polydimethylsiloxane into the suspension mixed solution, stirring the mixture to keep the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
100 parts of the rheological agent prepared by the weight part, 34 parts of sugar calcium and 55 parts of silica sol are added into a mixing stirrer to be uniformly stirred, 10 parts of dipropyl maleate and 5 parts of perfluorooctyltriethoxysilane are added into the mixing stirrer to be uniformly stirred, 5 parts of hydroxypropyl starch ether are added to be uniformly mixed, and then the reinforcing pumping aid is obtained,
the concrete added with the reinforced pumping aid comprises the following raw materials in parts by weight: 18 parts of Portland cement, 4 parts of fly ash, 3 parts of silica fume, 20 parts of natural sand, 20 parts of broken stone, 2 parts of a pumping enhancer, 0.5 part of a water reducing agent and 9 parts of water are uniformly mixed to obtain the concrete added with the pumping enhancer.
Claims (4)
1. A reinforced pumping agent for concrete is prepared by the following steps:
firstly, preparing a rheological agent, wherein the rheological agent comprises the following raw materials in parts by weight: 20-30 parts of magnesium aluminum silicate, 5-10 parts of bentonite, 3-5 parts of dihydroxy polydimethylsiloxane, 2-5 parts of maleic anhydride, 1-2 parts of tetramethyl divinyl disilazane and 20-30 parts of durene; weighing magnesium aluminum silicate and bentonite, uniformly mixing, putting into a ball mill for ball milling, wherein the ball milling time is 30 minutes, the ball milling speed is 500r/min, the granularity reaches 200-300 microns after ball milling, adding tetramethyl divinyl disilazane and durene, shaking and mixing by using a shaker, then heating and stirring in water bath at 50 ℃ for 30 minutes to form a suspension mixed solution, adjusting the pH value of the suspension mixed solution to 3-4, then adding dihydroxy polydimethylsiloxane into the suspension mixed solution for stirring, keeping the temperature of the mixed solution at 35-40 ℃, then adding maleic anhydride, adjusting the pH value to 5-6, putting the mixed solution into a reaction kettle, controlling the stirring speed at 100-120r/min to obtain a rheological agent,
100 parts of the prepared rheological agent, 30-40 parts of calcium saccharate and 50-60 parts of silica sol are added into a mixing stirrer to be uniformly stirred, 5-10 parts of dipropyl maleate and 2-5 parts of perfluorooctyltriethoxysilane are added into the mixing stirrer to be uniformly stirred, and 5-10 parts of hydroxypropyl starch ether are added to be uniformly mixed, so that the pumping enhancer is obtained.
2. A concrete reinforcing pumping aid as claimed in claim 1, said ball milled particles being up to 300 microns in size.
3. The enhanced pumping aid for concrete as claimed in claim 1, wherein the raw materials of the rheological agent comprise, by weight: 30 parts of magnesium aluminum silicate, 10 parts of bentonite, 3 parts of dihydroxy polydimethylsiloxane, 2 parts of maleic anhydride, 2 parts of tetramethyl divinyl disilazane and 25 parts of durene.
4. A concrete reinforcing pumping aid as claimed in claim 1, said rheological agent: sugar calcium: silica sol: dipropyl maleate: perfluorooctyltriethoxysilane: the proportion of hydroxypropyl starch ether is 100: 35: 60: 6: 3: 5.
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| CN108863156A (en) * | 2018-08-09 | 2018-11-23 | 马永胜 | A kind of concrete pump-feed agent |
| CN110157158A (en) * | 2019-05-14 | 2019-08-23 | 河北华强科技开发有限公司 | A kind of high strength glass fiber reinforced plastic |
| CN110436815A (en) * | 2019-08-07 | 2019-11-12 | 叶贵永 | A kind of low-temperature stabilization type concrete pump-feed agent |
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| CN107698188A (en) | 2018-02-16 |
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