CN109293278A - A kind of feeding exposed concrete pumping agent and preparation method thereof - Google Patents
A kind of feeding exposed concrete pumping agent and preparation method thereof Download PDFInfo
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- CN109293278A CN109293278A CN201811101050.3A CN201811101050A CN109293278A CN 109293278 A CN109293278 A CN 109293278A CN 201811101050 A CN201811101050 A CN 201811101050A CN 109293278 A CN109293278 A CN 109293278A
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- Prior art keywords
- agent
- water
- concrete pumping
- exposed concrete
- feeding
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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
Abstract
The invention discloses a kind of feeding exposed concrete pumping agents and preparation method thereof, are related to building materials manufacturing technology；Feeding exposed concrete pumping agent is made of based on the percentage composition of raw material gross weight following each raw material: poly carboxylic acid series water reducer 30%-60%, retarder 2%-6%, defoaming agent 0.2%-0.7%, rheological agent 1%-3%, air entraining agent 0.3%-0.9%, water-retaining agent 0.03%-0.08%, alum 1%-5%, sepiolite 0.6%-5%, surplus are water.Preparation method is to weigh each raw material by above-mentioned weight percent, and 50min first is mixed in water and sulfamate high-effective water-reducing agent, retarder, and defoaming agent, alum and sepiolite is added and stirs 90min；Be added rheological agent, air entraining agent and water-retaining agent stirring 60min to get.Pumping admixture of the invention keeps the concrete surface prepared flat and smooth, and effective compensation concrete shrinkage.
Description
Technical field
The present invention relates to building materials manufacturing technology more particularly to a kind of feeding exposed concrete pumping agent and its
Preparation method.
Background technique
Clear-water concrete has decorative effect, only needs one-time cast-forming, directly utilizes the nature after concrete formation
Texture is as finishing effect, and surface is not necessarily to secondary finishing and decoration after removing formwork for placing, with the natural matter of concrete itself
Sense combines the nature to be formed as decorative cover with well-designed outseam, buddhist seam and split bolt hole.Feeding clear water is mixed
Solidifying soil surface is smooth, corner angle are clearly demarcated, lines are smooth, uniform color, transition is for elevation of building decoration naturally, seem especially
Grace.Feeding clear-water concrete at home and abroad large-scale construction engineering is answered extensively in especially domestic science of bridge building
With.It is as a kind of Architectural form, because of its unique texture and decorative effect, also increasingly by architect and owner
Favor, while the artistic value of its natural harmony and environmentally protective social value will promote it to obtain more widely answering
With.
Currently, surface is very coarse after the concrete formation of existing normal concrete pumping admixture preparation, stomata honeycomb fiber crops
Face is more, influences decorative effect, and concrete surface planarization is bad, and after concrete formation, surface is very coarse, stomata honeycomb
The problems such as pitted skin.In addition, humidity declines, no in addition, due to the influence of surrounding medium, moisture loss is very fast after concrete casting
The moisture that cement needs aquation in early days can be fully met, pump concrete early stage generates self-constriction, temperature contracting and drying shrinkage, so as to cause
Concrete early stage generates crack, influences decorative effect.
Summary of the invention
Therefore, in view of the above problems, it is an object of the invention to overcome above-mentioned the deficiencies in the prior art, a kind of intensity is provided
Height, pumpability is good, and the concrete surface prepared can be made flat and smooth, no honeycomb, pitted skin, hole, no clashing and breaking and pollution, and fills out
Fill, block capillary slit, cut off capillary slit, macropore is made to become smaller, overall porosity reduces, can effective compensation concrete shrinkage benefit
Contracting exposed concrete pumping agent；In addition, the present invention also provides a kind of preparation methods of feeding exposed concrete pumping agent.
The technical solution that the present invention solves above-mentioned technical problem technology is as follows: a kind of feeding exposed concrete pumping agent,
Based on the percentage composition of raw material gross weight, it is made of following each raw material: poly carboxylic acid series water reducer 30%-60%, retarder 2%-
6%, defoaming agent 0.2%-0.7%, rheological agent 1%-3%, air entraining agent 0.3%-0.9%, water-retaining agent 0.03%-0.08%, sulphur
Sour aluminium ammonium 1%-5%, sepiolite 0.6%-5%, surplus are water.
The beneficial effects of the present invention are: the poly carboxylic acid series water reducer in pumping admixture of the invention can be avoided in concrete
A large amount of bubbles are generated, Compounded Antifoamer can eliminate the gas generated in the bubble or pumping procedure of other compositions bleed in concrete
Bubble keeps the concrete surface prepared flat and smooth in addition, the addition of rheological agent increases the package performance of concrete, no honeycomb,
Pitted skin, hole, and without clashing and breaking and pollution.Defoaming agent in the present invention can eliminate in concrete the bubble of other compositions bleed or
The bubble generated in pumping procedure further ensures the surfacing of feeding clear-water concrete；Contain bleed in pumping admixture
Agent, air entraining agent introduced in concrete it is a certain amount of be uniformly distributed, be closed, independent micro-bubble, on the one hand inhibit or weaken
The bleeding that fresh concrete occurs in casting process, on the other hand the ice crystal both to freeze provides certain expansion space,
A cushion space is provided for the osmotic pressure of subcooled water again, so that the freezing tolerance of concrete is improved, it is applied widely.Separately
Outside, also contain water-retaining agent in pumping admixture of the invention, there is excellent water holding capacity in concrete, can be effectively prevented mixed
The cracking phenomena that the too fast drying of solidifying soil and aquation not enough cause intensity to decline, concrete surface is flat and smooth to be obtained into one into changing
It is kind.
In addition, sepiolite and alum compatibility of the invention, make the present embodiment pumping admixture has getting up early and later period swollen
Swollen effect, so that certain microdilatancy is generated in inside concrete, the interface inside Behavior of Hardened Cement Paste and with thick (thin) aggregate, reinforcing bar,
By the crowd in-out effects of microdilatancy, whole compactness is improved, and hydrated product is filled with the hole of concrete.Therefore, this reality
The feeding exposed concrete pumping agent for applying example has the formation of filling, blocking capillary slit, cuts off capillary slit, becomes macropore
Small, overall porosity reduces, can effective compensation concrete shrinkage, hence it is evident that improves concrete initial value stability；Moreover, can be effective
Compensating concrete is shunk, and reduces overall porosity, is obtained so that concrete surface is flat and smooth into one into improvement.
In addition, based on the above technical solution, the present invention can also be improved as follows, can also have following additional
Technical characteristic.
Further, the feeding exposed concrete pumping agent of the present embodiment, based on the percentage composition of raw material gross weight, by such as
Under each raw material composition: poly carboxylic acid series water reducer 45%, retarder 4%, defoaming agent 0.4%, rheological agent 2%, air entraining agent 0.6%,
Water-retaining agent 0.05%, alum 3%, sepiolite 2.5%, surplus are water.
Further, the retarder is sugar calcium, Icing Sugar, sodium tripolyphosphate, maltodextrin, calgon, sucrose or Portugal
At least one of grape sodium saccharate.
Further, the air entraining agent is any one in triterpenoid saponin or AOS air entraining agent.
Further, the defoaming agent is any one in dimethicone or silicone emulsion.
Further, the partial size of the sepiolite is 30-55nm.
In addition, including the following steps: the present invention also provides a kind of preparation method of feeding exposed concrete pumping agent
(1) based on the percentage composition of raw material gross weight, the following raw material is weighed: poly carboxylic acid series water reducer poly carboxylic acid series water reducer
30%-60%, it retarder 2%-6%, defoaming agent 0.2%-0.7%, rheological agent 1%-3%, air entraining agent 0.3%-0.9%, protects
Aqua 0.03%-0.08%, alum 1%-5%, sepiolite 0.6%-5%, surplus are water；
(2) 30-50min first then is mixed in water and sulfamate high-effective water-reducing agent, retarder, is added disappears later
Infusion, alum and sepiolite stir 60-90min；
(3) rheological agent, air entraining agent and water-retaining agent stirring 30-60min are added, the feeding clear-water concrete can be obtained
Pumping admixture.
Specific embodiment
Principles and features of the present invention are described below in conjunction with specific embodiment, example is served only for explaining this hair
Bright, still, the invention may also be implemented in other ways than those described herein, therefore, protection of the invention
Range is not limited by the specific embodiments disclosed below.
Embodiment 1:
The feeding exposed concrete pumping agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each original
Material composition: poly carboxylic acid series water reducer 60%, sodium gluconate 2%, silicone emulsion 0.7%, rheological agent 1%, triterpenoid saponin
0.9%, water-retaining agent 0.03%, alum 5%, sepiolite 5%, water 25.37%.
Sodium gluconate in the present embodiment can use sugar calcium, Icing Sugar, sodium tripolyphosphate, maltodextrin, hexa metaphosphoric acid
Any one in sodium, sucrose is replaced；Triterpenoid saponin in the present embodiment can be replaced using AOS air entraining agent,
Middle AOS air entraining agent refers to alpha-olefin sodium sulfonate；Silicone emulsion in the present embodiment can be replaced using dimethicone；This
The feeding exposed concrete pumping agent each component of embodiment is commercial product, and the water of the present embodiment is underground water.
Make specifically, each component in feeding exposed concrete pumping agent in the present embodiment has played collaboration well
With high performance water reducing agent of polyocarboxy acid ensure that the high water reduction performance of pumping admixture；Defoaming agent in the present embodiment can eliminate poly- carboxylic
The bubble generated in the bubble or pumping procedure of other compositions bleed in sour high-performance water reducing agent and concrete, can also eliminate
The bad bubble of other compositions bleed, further ensures the surfacing of feeding clear-water concrete in concrete.
Specifically, the retarder of the present embodiment can extend the firm time of cement, enable new mixing concrete longer
Plasticity is kept in time, to adjust the setting time of new mixing concrete.Inhibitor as concrete slump loss simultaneously,
Retarder may insure that concrete has preferable mobility in pumping procedure.Water-retaining agent in the present embodiment can slow down mixed
The loss of moisture, reduces slump-loss, improves the mobility of concrete, improve the workability of concrete in solidifying soil pumping procedure
With adhesive aggregation performance.
Specifically, water-retaining agent in the present embodiment is cellulose ether, be using native cellulose as raw material, it is chemically modified
Synthesis type high molecular polymer obtained, with excellent water holding capacity, can be effectively prevented the too fast drying of concrete and
The cracking phenomena that aquation not enough causes intensity to decline, concrete surface is flat and smooth to be obtained into one into improvement.
Specifically, sepiolite and alum compatibility in the present embodiment, make the present embodiment pumping admixture have getting up early and
Late expansion effect, to generate certain microdilatancy in inside concrete, inside Behavior of Hardened Cement Paste and with thick (thin) aggregate, reinforcing bar
Interface, by the crowd in-out effects of microdilatancy, whole compactness is improved, and hydrated product is filled with the hole of concrete.Therefore,
The feeding exposed concrete pumping agent of the present embodiment has the formation of filling, blocking capillary slit, cuts off capillary slit, makes big
Hole becomes smaller, and overall porosity reduces, can effective compensation concrete shrinkage, hence it is evident that concrete initial value stability is improved, moreover, mixed
Solidifying soil smooth surface is improved.Specifically, the partial size of the sepiolite of the present embodiment is 30-55nm.
In addition, the preparation method of the feeding exposed concrete pumping agent of the present embodiment, includes the following steps:
(1) based on the percentage composition of raw material gross weight, the following raw material is weighed: poly carboxylic acid series water reducer 60%, gluconic acid
Sodium 2%, silicone emulsion 0.7%, rheological agent 1%, triterpenoid saponin 0.9%, water-retaining agent 0.03%, alum 5%, sepiolite
5%, water 25.37%；
(2) then first water is mixed with sulfamate high-effective water-reducing agent, sodium gluconate, alum and sepiolite and is stirred
50min is mixed, silicone emulsion is added later and stirs 90min；
(3) rheological agent, triterpenoid saponin and water-retaining agent stirring 60min are added, the feeding clear-water concrete can be obtained
Pumping admixture.
Embodiment 2:
The feeding exposed concrete pumping agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each original
Material composition: poly carboxylic acid series water reducer 45%, sodium gluconate 4%, silicone emulsion 0.4%, rheological agent 2%, triterpenoid saponin
0.6%, water-retaining agent 0.05%, alum 3%, sepiolite 2.5%, water 42.45%.
The present embodiment is by upper component proportionally feeding, and the preparation method is the same as that of Example 1 for the present embodiment；The present embodiment uses
Water-retaining agent can be with embodiment 1, the sodium gluconate in the present embodiment can be using sugar calcium, Icing Sugar, sodium tripolyphosphate, malt paste
Essence, calgon, any one in sucrose are replaced；Triterpenoid saponin in the present embodiment can use AOS air entraining agent
It is replaced；Silicone emulsion in the present embodiment can be replaced using dimethicone.
Embodiment 3:
The feeding exposed concrete pumping agent of the present embodiment, based on the percentage composition of raw material gross weight, by following each original
Material composition: poly carboxylic acid series water reducer 30%, sodium gluconate 6%, silicone emulsion 0.2%, rheological agent 3%, triterpenoid saponin
0.3%, water-retaining agent 0.08%, alum 1%, sepiolite 0.6%, water 58.82%.
The present embodiment is by upper component proportionally feeding, and the preparation method is the same as that of Example 1 for the present embodiment；The present embodiment uses
Water-retaining agent can be with embodiment 1, the sodium gluconate in the present embodiment can be using sugar calcium, Icing Sugar, sodium tripolyphosphate, malt paste
Essence, calgon, any one in sucrose are replaced；Triterpenoid saponin in the present embodiment can use AOS air entraining agent
It is replaced；Silicone emulsion in the present embodiment can be replaced using dimethicone.
It is obtained by many experiments, to the functional of feeding exposed concrete pumping agent obtained by the present embodiment 1-3；Add
The appearance luster for the concrete for adding feeding exposed concrete pumping agent obtained by the present embodiment 1-3 to be formed is uniform, without obvious bubble,
And the poly carboxylic acid series water reducer in pumping admixture of the invention can be avoided and generate a large amount of bubbles in concrete, Compounded Antifoamer can
To eliminate the bubble generated in the bubble or pumping procedure of other compositions bleed in concrete, keep the concrete surface prepared smooth
It is smooth, no honeycomb, pitted skin, hole, and without clashing and breaking and pollution.Contain air entraining agent in pumping admixture, is introduced in concrete a certain amount of
Be uniformly distributed, be closed, independent micro-bubble, on the one hand inhibit or weaken secreting of occurring in casting process of fresh concrete
Water, on the other hand the ice crystal not only to freeze provides certain expansion space, but also provides one for the osmotic pressure of subcooled water
Cushion space, so that the freezing tolerance of concrete is improved, it is applied widely.In addition, also containing water conservation in pumping admixture of the invention
Agent has excellent water holding capacity in concrete, can be effectively prevented the too fast drying of concrete and aquation not enough causes by force
The cracking phenomena for spending decline, moreover, sepiolite and alum compatibility in the present embodiment, can effective compensation concrete shrinkage,
Overall porosity is reduced, concrete surface is flat and smooth to be obtained into one into improvement.
These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art
For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification,
Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of feeding exposed concrete pumping agent, which is characterized in that based on the percentage composition of raw material gross weight, by following each
Raw material composition: poly carboxylic acid series water reducer 30%-60%, retarder 2%-6%, defoaming agent 0.2%-0.7%, rheological agent 1%-
3%, air entraining agent 0.3%-0.9%, water-retaining agent 0.03%-0.08%, alum 1%-5%, sepiolite 0.6%-5%, remaining
Amount is water.
2. a kind of feeding exposed concrete pumping agent according to claim 1, which is characterized in that by raw material gross weight
Percentage composition meter is made of: poly carboxylic acid series water reducer 45%, retarder 4%, defoaming agent 0.4%, rheological agent following each raw material
2%, air entraining agent 0.6%, water-retaining agent 0.05%, alum 3%, sepiolite 2.5%, surplus are water.
3. a kind of feeding exposed concrete pumping agent according to claim 1 or 2, which is characterized in that the retarder
For at least one of sugar calcium, Icing Sugar, sodium tripolyphosphate, maltodextrin, calgon, sucrose or sodium gluconate.
4. a kind of feeding exposed concrete pumping agent according to claim 1 or 2, which is characterized in that the air entraining agent
For any one in triterpenoid saponin or AOS air entraining agent.
5. a kind of feeding exposed concrete pumping agent according to claim 1 or 2, which is characterized in that the defoaming agent
For any one in dimethicone or silicone emulsion.
6. a kind of feeding exposed concrete pumping agent according to claim 1 or 2, which is characterized in that the sepiolite
Partial size be 30-55nm.
7. a kind of preparation method of feeding exposed concrete pumping agent, which comprises the steps of:
(1) based on the percentage composition of raw material gross weight, the following raw material is weighed: poly carboxylic acid series water reducer 30%-55%, retarder
2%-5%, defoaming agent 0.1%-0.6%, rheological agent 1%-3%, air entraining agent 0.3%-0.8%, water-retaining agent 0.03%-
0.08%, surplus is water；
(2) 30-50min first then is mixed in water and sulfamate high-effective water-reducing agent, retarder, defoaming is added later
Agent, alum and sepiolite stir 60-90min；
(3) rheological agent, air entraining agent and water-retaining agent stirring 30-60min are added, the feeding clear-water concrete pumping can be obtained
Agent.
8. a kind of preparation method of feeding exposed concrete pumping agent according to claim 7, it is characterised in that: described
Retarder is sodium gluconate.
9. a kind of preparation method of feeding exposed concrete pumping agent according to claim 7, which is characterized in that described
Air entraining agent is triterpenoid saponin.
10. a kind of preparation method of feeding exposed concrete pumping agent according to claim 7, which is characterized in that institute
Stating defoaming agent is silicone oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101050.3A CN109293278A (en) | 2018-09-20 | 2018-09-20 | A kind of feeding exposed concrete pumping agent and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811101050.3A CN109293278A (en) | 2018-09-20 | 2018-09-20 | A kind of feeding exposed concrete pumping agent and preparation method thereof |
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| Publication Number | Publication Date |
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| CN109293278A true CN109293278A (en) | 2019-02-01 |
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| CN201811101050.3A Pending CN109293278A (en) | 2018-09-20 | 2018-09-20 | A kind of feeding exposed concrete pumping agent and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101762A (en) * | 2010-12-29 | 2011-06-22 | 山东宏艺科技股份有限公司 | Exposed concrete pumping agent and preparation method thereof |
| CN103086635A (en) * | 2013-02-25 | 2013-05-08 | 十九冶成都建设有限公司 | Pumping agent and application thereof |
| CN103524069A (en) * | 2013-09-26 | 2014-01-22 | 中国十九冶集团有限公司 | Concrete pumping agent as well as preparation method and application thereof |
| WO2015002668A1 (en) * | 2013-07-02 | 2015-01-08 | Garner Van Dyke | Cement composition |
| CN106145745A (en) * | 2016-06-24 | 2016-11-23 | 桂林华越环保科技有限公司 | A kind of compensating shrinkage of concrete pumping admixture |
-
2018
- 2018-09-20 CN CN201811101050.3A patent/CN109293278A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102101762A (en) * | 2010-12-29 | 2011-06-22 | 山东宏艺科技股份有限公司 | Exposed concrete pumping agent and preparation method thereof |
| CN103086635A (en) * | 2013-02-25 | 2013-05-08 | 十九冶成都建设有限公司 | Pumping agent and application thereof |
| WO2015002668A1 (en) * | 2013-07-02 | 2015-01-08 | Garner Van Dyke | Cement composition |
| CN103524069A (en) * | 2013-09-26 | 2014-01-22 | 中国十九冶集团有限公司 | Concrete pumping agent as well as preparation method and application thereof |
| CN106145745A (en) * | 2016-06-24 | 2016-11-23 | 桂林华越环保科技有限公司 | A kind of compensating shrinkage of concrete pumping admixture |
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Application publication date: 20190201 |