CN106116225A - A kind of concrete water-retaining agent - Google Patents
A kind of concrete water-retaining agent Download PDFInfo
- Publication number
- CN106116225A CN106116225A CN201610471371.7A CN201610471371A CN106116225A CN 106116225 A CN106116225 A CN 106116225A CN 201610471371 A CN201610471371 A CN 201610471371A CN 106116225 A CN106116225 A CN 106116225A
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- CN
- China
- Prior art keywords
- parts
- concrete
- retaining agent
- water
- concrete water
- 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.)
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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
- C04B2103/46—Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
- C04B2103/465—Water-sorbing agents, hygroscopic or hydrophilic agents
-
- 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
- C04B2111/34—Non-shrinking or non-cracking materials
- C04B2111/343—Crack resistant materials
-
- 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
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention belongs to technical field of concrete additives, particularly to a kind of concrete water-retaining agent, be made up of the raw material of following weight portion: hydroxyethyl ether cellulose 30～50 parts, sepiolite powder 10～18 parts, carboxymethyl starch sodium 5～15 parts, calcium sulphoaluminate 3～15 parts, tea saponin 2～10 parts.The concrete water-retaining agent of the present invention has the water retention property of excellence, and indices meets cracking resistance, the index request of lower shrinkage concrete simultaneously, and has good stability, has preferable anti-bleeding and isolates effect.
Description
Technical field
The invention belongs to technical field of concrete additives, particularly to a kind of concrete water-retaining agent.
Background technology
Cement needs enough water in hardening process and reacts, the intensity of guarantee cement.General requirement is just
Ready-made concrete need to be sprinkled water maintenance more than 7 days.But in many Practical Projects, often do not accomplish maintenance 7 days of sprinkling water, and cement
The ratio of the moisture evaporation on surface is very fast, if do not retained the moisture in concrete, will certainly affect the intensity of cement.Traditional coagulation
The method of soil water conservation is to add appropriate cellulose.Fiber have certain water retention, but effect is bad.The most also
Have the sealing compound playing water retention, such as organosilicon sealing compound, this kind of sealing compound mechanism of action generally at concrete formation 4～
Spray one layer of sealing compound after 8 hours again above, make concrete surface form one layer of hydrophobic film, thus play maintenance action.This
Sample sealing compound need to individually be constructed, complex procedures.Additionally, existing water-retaining agent is compounding yet suffers from poor stability, there is delayed secreting
The phenomenon such as water, isolation.
Additionally, being widely used along with additive, the ratio of mud is more and more less, and in concrete, free water is little, easily in work
There is plastic shrinkage in journey thus cause face checking；The raw material factors such as the increase of cement consumption and fineness further increase
Early-age shrinkage；Additionally, due to the environmental factors such as construction temperature, wind speed, maintenance waits construction factor not in time, has been further exacerbated by mixed
The probability that solidifying soil cracking seam occurs.Under conditions of cement, additive, admixture cannot adjust, the how cracking resistance of Concrete Structure
Performance, is pendulum technical barrier in face of technical staff.
Summary of the invention
The technical problem to be solved is to provide a kind of concrete water-retaining agent, and it has the water retention property of excellence,
There is good cracking resistance simultaneously.
For achieving the above object, technical scheme to be solved by this invention is:
The present invention provides a kind of concrete water-retaining agent, is made up of the raw material of following weight portion: hydroxyethyl ether cellulose 30～
50 parts, sepiolite powder 10～18 parts, carboxymethyl starch sodium 5～15 parts, calcium sulphoaluminate 3～15 parts, tea saponin 2～10 parts.
Preferably, concrete water-retaining agent of the present invention, it is made up of the raw material of following weight portion: hydroxyethyl ether cellulose
35～45 parts, sepiolite powder 12～16 parts, carboxymethyl starch sodium 7～13 parts, calcium sulphoaluminate 7～12 parts, tea saponin 4～8 parts.
It is highly preferred that concrete water-retaining agent of the present invention, it is made up of the raw material of following weight portion: hydroxyethyl cellulose
40 parts of ether, sepiolite powder 14 parts, carboxymethyl starch sodium 10 parts, calcium sulphoaluminate 10 parts, tea saponin 6 parts.
Preferably, the mean diameter of sepiolite powder of the present invention is 1～10 μm.Meerschaum in this particle size range,
With other material combination, not only there is preferable water-retaining property, additionally it is possible to preferably solve concrete and find the phenomenon in crack, improve mixed
Solidifying soil intensity.
Preferably, the mean diameter of sepiolite powder of the present invention is 5 μm.
The tea saponin of the present invention belongs to triterpenoid saponin, is the nonionic pure natural surface activity of a kind of function admirable
Agent, it has effects such as stronger foaming, emulsifying, dispersion, moistening, and is little affected by the impact of water hardness, and it bubbles fast,
Amount of air entrainment is relatively large, with hydroxyethyl ether cellulose, carboxymethyl starch sodium compatibility, it is possible to improve the mechanical strength of foam further,
The group of the part of hydroxyethyl ether cellulose and carboxymethyl starch sodium can combine with water molecules hydrogen bond so that moisture can be by
Absorption is not run off on bubble film, reduces concrete water bleeding rate, improves foam stability；When after cement solidification bubble-break,
Hydroxyethyl ether cellulose and carboxymethyl starch sodium and other material combination can adsorb large quantity of moisture, it is to avoid moisture from slit it
Between evaporated, thus ensure the follow-up aquation of cement, it is ensured that the cracking resistance of concrete.
The calcium sulphoaluminate of the present invention produces certain microdilatancy at inside concrete, Behavior of Hardened Cement Paste internal and with thick (carefully) bone
Material, the interface of reinforcing bar, by the crowd in-out effects of microdilatancy, overall degree of compaction is improved, and hydrated product is filled with concrete
Hole, has filling, the formation of blocking capillary slit, cuts off capillary slit, make macropore diminish, and overall porosity reduces, can be effective
Reduce, compensating concrete shrinks, hence it is evident that improve the long-term volume stability of concrete.
Compared to existing technology, the beneficial effects of the present invention is:
1, the concrete water-retaining agent of the present invention has the water retention property of excellence, and its water retention can be to more than 93%, and open air is put
Put seven days percentages of water loss and be only 3～8%.
2, using the concrete water-retaining agent of the present invention, concrete water-reducing ratio significantly improves, and does not has bleeding, segregation phenomenon, warp
Test, compared with normal concrete, water-reducing rate is more than 8%.
3, using the concrete water-retaining agent of the present invention, the intensity of concrete can also improve, through test, with normal concrete phase
Ratio, concrete flexural strength can improve 6～11%, 7d and 28d compressive strength rate is all more than 99%.
4, the concrete water-retaining agent of the present invention is used, it is possible to increase the workability of concrete mix, concrete mix
The slump and divergence gradual loss little, the duty of mixture is good, it is possible to ensure concrete mix workability
Quality with concrete.
5, the concrete water-retaining agent property indices of the present invention meets cracking resistance, the index request of lower shrinkage concrete.
6, the concrete water-retaining agent stable performance of the present invention, and good with the adaptability of concrete, additional with other concrete
Agent compatibility is good.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, but the invention is not limited in these embodiments.
Embodiment 1
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
30 parts, sepiolite powder (mean diameter is 1 μm) 18 parts, carboxymethyl starch sodium 15 parts, calcium sulphoaluminate 15 parts, tea saponin 2 parts.
Embodiment 2
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
35 parts, sepiolite powder (mean diameter is 3 μm) 16 parts, carboxymethyl starch sodium 7 parts, calcium sulphoaluminate 12 parts, tea saponin 8 parts.
Embodiment 3
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
40 parts, sepiolite powder (mean diameter is 4 μm) 14 parts, carboxymethyl starch sodium 10 parts, calcium sulphoaluminate 10 parts, tea saponin 6 parts.
Embodiment 4
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
45 parts, sepiolite powder (mean diameter is 6 μm) 12 parts, carboxymethyl starch sodium 13 parts, calcium sulphoaluminate 7 parts, tea saponin 4 parts.
Embodiment 5
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
50 parts, sepiolite powder (mean diameter is 7 μm) 10 parts, carboxymethyl starch sodium 5 parts, calcium sulphoaluminate 3 parts, tea saponin 10 parts.
Embodiment 6
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
33 parts, sepiolite powder (mean diameter is 8 μm) 17 parts, carboxymethyl starch sodium 14 parts, calcium sulphoaluminate 11 parts, tea saponin 9 parts.
Embodiment 7
A kind of concrete water-retaining agent, is made up (mix homogeneously) of the raw material of following weight portion: hydroxyethyl ether cellulose
48 parts, sepiolite powder (mean diameter is 10 μm) 11 parts, carboxymethyl starch sodium 7 parts, calcium sulphoaluminate 4 parts, tea saponin 6 parts.
Claims (5)
1. a concrete water-retaining agent, it is characterised in that be made up of the raw material of following weight portion: hydroxyethyl ether cellulose 30～50
Part, sepiolite powder 10～18 parts, carboxymethyl starch sodium 5～15 parts, calcium sulphoaluminate 3～15 parts, tea saponin 2～10 parts.
Concrete water-retaining agent the most according to claim 1, it is characterised in that be made up of the raw material of following weight portion: hydroxyl second
Base cellulose ether 35～45 parts, sepiolite powder 12～16 parts, carboxymethyl starch sodium 7～13 parts, calcium sulphoaluminate 7～12 parts, tea soap
Element 4～8 parts.
Concrete water-retaining agent the most according to claim 2, it is characterised in that be made up of the raw material of following weight portion: hydroxyl second
Base cellulose ether 40 parts, sepiolite powder 14 parts, carboxymethyl starch sodium 10 parts, calcium sulphoaluminate 10 parts, tea saponin 6 parts.
4. according to the concrete water-retaining agent described in claims 1 to 3 any one, it is characterised in that: putting down of described sepiolite powder
All particle diameters are 1～10 μm.
5. according to the concrete water-retaining agent described in claims 1 to 3 any one, it is characterised in that: putting down of described sepiolite powder
All particle diameters are 5 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610471371.7A CN106116225A (en) | 2016-06-24 | 2016-06-24 | A kind of concrete water-retaining agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610471371.7A CN106116225A (en) | 2016-06-24 | 2016-06-24 | A kind of concrete water-retaining agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106116225A true CN106116225A (en) | 2016-11-16 |
Family
ID=57269603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610471371.7A Pending CN106116225A (en) | 2016-06-24 | 2016-06-24 | A kind of concrete water-retaining agent |
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| CN (1) | CN106116225A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107118778A (en) * | 2017-06-14 | 2017-09-01 | 合肥助航生态农业科技有限公司 | Water-loss reducer of soil and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073669A (en) * | 1991-12-27 | 1993-06-30 | 中国石油天然气总公司工程技术研究所 | Dispersion resistant additive of underwater concrete and manufacture method thereof |
| CN103553418A (en) * | 2013-09-27 | 2014-02-05 | 江苏兆佳建材科技有限公司 | Ready-mixed mortar water-retention thixotropic agent and preparation method thereof |
| CN105366984A (en) * | 2015-12-08 | 2016-03-02 | 科之杰新材料集团有限公司 | Wet-mixed mortar water-retention plasticizer, and preparation method thereof |
-
2016
- 2016-06-24 CN CN201610471371.7A patent/CN106116225A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1073669A (en) * | 1991-12-27 | 1993-06-30 | 中国石油天然气总公司工程技术研究所 | Dispersion resistant additive of underwater concrete and manufacture method thereof |
| CN103553418A (en) * | 2013-09-27 | 2014-02-05 | 江苏兆佳建材科技有限公司 | Ready-mixed mortar water-retention thixotropic agent and preparation method thereof |
| CN105366984A (en) * | 2015-12-08 | 2016-03-02 | 科之杰新材料集团有限公司 | Wet-mixed mortar water-retention plasticizer, and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107118778A (en) * | 2017-06-14 | 2017-09-01 | 合肥助航生态农业科技有限公司 | Water-loss reducer of soil and preparation method thereof |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161116 |