CN109678384A - A kind of dedicated early-strength admixture of prefabricated components concrete - Google Patents
A kind of dedicated early-strength admixture of prefabricated components concrete Download PDFInfo
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- CN109678384A CN109678384A CN201910061916.0A CN201910061916A CN109678384A CN 109678384 A CN109678384 A CN 109678384A CN 201910061916 A CN201910061916 A CN 201910061916A CN 109678384 A CN109678384 A CN 109678384A
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- mother liquor
- component
- prefabricated components
- early
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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
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/10—Accelerators; Activators
- C04B2103/12—Set accelerators
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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
本发明提供了一种预制构件混凝土专用早强型外加剂。本发明解决的技术问题主要是提供一种能够提高冬季预制构件混凝土早期强度的外加剂。以重量百分比计，所述预制构件混凝土用早强型外加剂主要包括如下组分：聚羧酸减水型母液15‑25%；聚羧酸保坍型母液6‑15%；早强组分6‑12%；抗泥组分3‑8%；抗离析组分1‑3%；余量为水。本发明制得的外加剂突出优点是：减水率高、早强效果明显；与水泥适应性好，且在砂石含泥量高的情况下，效果同样显著；生产所用原材料无刺激性气味、无毒性，绿色环保；所含组分无氯离子，对预制构件钢筋无腐蚀、破坏作用。The invention provides a special early-strength type admixture for prefabricated component concrete. The technical problem solved by the present invention is mainly to provide an admixture capable of improving the early strength of prefabricated component concrete in winter. In terms of percentage by weight, the early-strength type admixture for prefabricated concrete mainly includes the following components: 15-25% of polycarboxylate water-reducing mother liquor; 6-15% of polycarboxylate slump-preserving mother liquor; early-strength components 6-12%; anti-mud component 3-8%; anti-segregation component 1-3%; the balance is water. The outstanding advantages of the admixture prepared by the invention are: high water reduction rate and obvious early strength effect; good adaptability to cement, and the effect is also remarkable when the sand and gravel content is high; the raw materials used in production have no irritating odor , Non-toxic, green and environmentally friendly; the components contained are free of chloride ions, and there is no corrosion or damage to prefabricated steel bars.
Description
Technical field
The present invention relates to building material technical field more particularly to a kind of dedicated early-strength of prefabricated components concrete are additional
Agent.
Background technique
Concrete prefabricated element refers to the concrete product processed in the factory by standardization, mechanized manner,
Corresponding poured in place concrete needs the links such as building-site molding, cast in situs and scene maintenance, quality control
Link is excessively complicated.It is with the obvious advantage to shorten the production cycle to construction quality is improved for the appearance of concrete prefabricated element.But by
It is relatively low in modern concrete early strength, can not fast demoulding, cause mold turnover low, it is pre- seriously to constrain assembled architecture
The development of component processed.
Entitled " a kind of dedicated early strength water-reducing agent of prefabricated components (Chinese patent application publication No.: CN108409187A) "
Patent discloses a kind of dedicated early strength water-reducing agent of prefabricated components, which has certain early strong, diminishing, humidification,
Belong to natural curing additive, but the water-reducing agent is powder, needs concrete mixer additionally to configure barrel in specific application,
Increase enterprise's production cost.Meanwhile feelings are not clearly promoted using early strength of concrete after the product in the patent working part
Condition, it is lower to industrial applications reference value.
It is entitled that " a kind of dedicated high early strength poly-carboxylic water-reducing agent of prefabricated components and preparation method thereof (announce by Chinese patent application
Number: patent CN104496253A) " discloses a kind of dedicated high early strength poly-carboxylic water-reducing agent of prefabricated components and preparation method thereof, should
The high early strength poly-carboxylic water-reducing agent water-reducing rate of invention is high, and early strength is high, and shrinking percentage is lower, and adaptability is good, without first in production process
Aldehyde pollution.But the patent do not account for needed in actual production prefabricated components for 24 hours in demould demand, be only 7d with
The comparison of 28d intensity does not illustrate the strength conditions in 3d age, smaller to the reference value of actual production.
Therefore, a kind of dedicated early-strength admixture of prefabricated components concrete is prepared, can effectively solve the prior art pre-
In component production process processed the problem of concrete 1d low strength, prefabricated components quality is improved, accelerates mold turnover, is promoted pre-
Popularization and use of the component processed in China's industrialized production.
Summary of the invention
In view of this, the purpose of the present invention is to provide a kind of dedicated early-strength admixtures of prefabricated components concrete.
In order to achieve the above-mentioned object of the invention, the present invention the following technical schemes are provided:
The present invention provides a kind of dedicated early-strength admixture of prefabricated components concrete, the raw material including following weight percent:
Polycarboxylic acids water reducing type mother liquor 15-25%；
Polycarboxylic acids collapse protection type mother liquor 6-15%；
Accelerating component 6-12%；
Anti- mud component 3-8%；
Anti-educing component 1-3%；
Surplus is water.
Preferably, a kind of dedicated early-strength admixture of prefabricated components concrete, the original including following weight percent
Material:
Polycarboxylic acids water reducing type mother liquor 16-22%；
Polycarboxylic acids collapse protection type mother liquor 8-12%；
Accelerating component 8-10%；
Anti- mud component 3-5%；
Anti-educing component 1%；
Surplus is water.
Preferably, the polycarboxylic acids water reducing type mother liquor is one in acrylic compounds or methacrylic polycarboxylic acids mother liquor
Kind.
Preferably, the polycarboxylic acids collapse protection type mother liquor is isoamyl alcohol polyoxyethylene ether class or methacrylic polyoxyethylene
One of ethers polycarboxylic acids mother liquor.
Preferably, the accelerating component is pressed the ratio of 3:4:2:1 by aluminum sulfate, sodium acetate, calcium nitrite and triisopropanolamine
Example is combined.
Preferably, the anti-mud component is combined by odium stearate and ethylene glycol in the ratio of 6:4 or 7:3.
Preferably, the anti-educing component is sorbierite.
Preferably, the preparation method of the dedicated early-strength admixture of prefabricated components concrete, comprising the following steps:
Step 1: weighing or preparing each component according to the proportion；
Step 2: agitator tank is added in polycarboxylic acids water reducing type mother liquor and polycarboxylic acids collapse protection type mother liquor, 90s or more is added water and stirred, is made
It is sufficiently mixed；
Step 3: accelerating component is added in mixed liquor made from step 2,120s or more is stirred, dissolves it sufficiently；
Step 4: anti-mud component is added in mixed liquor made from step 3,60s or more is stirred, dissolves it sufficiently；
Step 5: anti-educing component is added in mixed liquor made from step 4,30s or more is stirred, mixes them thoroughly, obtains
The dedicated early-strength admixture of prefabricated components concrete.
The work of several main raw material(s)s is now used as following elaboration by technical solution of the present invention for ease of understanding:
1. the present invention is using polycarboxylic acids water reducing type mother liquor as diminishing component.The polycarboxylic acids mother liquor synthesized with acrylic or methacrylic acid
Have the effect of water-reducing rate superelevation, guarantees the high water reducing rate for compounding additive with this；
2. the present invention is to protect component of collapsing with polycarboxylic acids collapse protection type mother liquor.With isoamyl alcohol polyoxyethylene ether or methacrylic polyoxy
The polycarboxylic acids mother liquor of vinethene synthesis has the effect of high-thin arch dam, guarantees the high-thin arch dam ability for compounding additive with this；
3. the present invention is using aluminum sulfate, sodium acetate, calcium nitrite and triisopropanolamine as accelerating component.Aluminum sulfate is strong electrolyte,
The ionic strength in cement slurry can be improved.In the hydration process of cement, aluminum sulfate is dissolved in the hydrogen that water and hydrated cementitious generate
Calcium oxide reaction generates calcium sulfate and sodium hydroxide；Sodium acetate can reduce the concentration of cement hydrolysate in water, to promote
Into the raising of the cement components solution rate such as tricalcium silicate and tricalcium aluminate, accelerate the hydrated products such as entringite, C-S-H gel
It generates, accelerates the condensation and hardening of cement；Calcium nitrite can promote hydrated calcium silicate (C-S-H) to generate, accelerate the water of cement
Change, improves the pore structure of hydrated product, concrete structure is closely knit；The good dispersion of triisopropanolamine, surface-active are superior, can add
The activity of aquation generation colloid by force plays the role of aggravation absorption, soaks and disperse particle, quickening concrete strength is developed,
It is beneficial to improve intensity, the density and impermeability of concrete additionally can be improved；
4. the present invention is with odium stearate and ethylene glycol for anti-mud component.Odium stearate can be preferentially adsorbed on clay surface, inhibit
Clay interlayer structure water swelling reduces concrete viscosity, to have the function that anti-mud；The addition of ethylene glycol can enhance tristearin
The peptizaiton of sour sodium, two kinds of materials show excellent synergistic effect, make agent on crack resistance of concrete mud capability improving；
5. the present invention is using sorbierite as anti-educing component.Sorbierite can reduce polycarboxylate water-reducer to the sensibility of water consumption,
There is certain contraction to concrete simultaneously, to achieve the purpose that anti-isolation.
Compared with prior art, the invention has the benefit that
Under 1.25 DEG C of curing conditions, C30 concrete 3d intensity is obviously improved, and 1d intensity can reach 15MPa, and 3d intensity can reach
25MPa accelerates prefabricated components demoulding time；
2. concrete goes out slump free of losses in machine 30min, meet prefabricated components production needs；
Phenomena such as 3. concrete workability is good, viscosity is low, no isolation bleeding；
It is not in strength retraction phenomenon 4. concrete long-age gain in strength is stablized.
Specific embodiment
The present invention will be further described with reference to embodiments, but the invention is not limited to these embodiments.
Embodiment 1
A kind of dedicated early-strength admixture of prefabricated components concrete, the raw material including following weight percent:
Polycarboxylic acids water reducing type mother liquor 20%；
Polycarboxylic acids collapse protection type mother liquor 10%；
Accelerating component 8%；
Anti- mud component 3%；
Anti-educing component 1%；
Water 58%.
Wherein, the polycarboxylic acids water reducing type mother liquor is acrylic polymer carboxylic acid mother liquor；The polycarboxylic acids collapse protection type mother liquor is
Isoamyl alcohol polyoxyethylene ether is birdsed of the same feather flock together carboxylic acid mother liquor；The accelerating component is by aluminum sulfate, sodium acetate, calcium nitrite and three isopropanols
Amine is combined in the ratio of 3:4:2:1；The anti-mud component is combined by odium stearate and ethylene glycol in 6:4 ratio；Institute
Stating anti-educing component is sorbierite.
A kind of preparation process of the dedicated early-strength admixture of prefabricated components concrete carries out as follows:
Step 1: weighing or preparing each component according to the proportion；
Step 2: agitator tank is added in polycarboxylic acids water reducing type mother liquor and polycarboxylic acids collapse protection type mother liquor, 90s or more is added water and stirred, is made
It is sufficiently mixed；
Step 3: accelerating component is added in mixed liquor made from step 2,120s or more is stirred, dissolves it sufficiently；
Step 4: anti-mud component is added in mixed liquor made from step 3,60s or more is stirred, dissolves it sufficiently；
Step 5: anti-educing component is added in mixed liquor made from step 4,30s or more is stirred, mixes them thoroughly, obtains
The dedicated early-strength admixture of prefabricated components concrete.
Embodiment 2
A kind of dedicated early-strength admixture of prefabricated components concrete, the raw material including following weight percent:
Polycarboxylic acids water reducing type mother liquor 20%；
Polycarboxylic acids collapse protection type mother liquor 10%；
Accelerating component 10%；
Anti- mud component 3%；
Anti-educing component 1%；
Water 56%.
Wherein, the polycarboxylic acids water reducing type mother liquor is acrylic polymer carboxylic acid mother liquor；The polycarboxylic acids collapse protection type mother liquor is
Isoamyl alcohol polyoxyethylene ether is birdsed of the same feather flock together carboxylic acid mother liquor；The accelerating component is by aluminum sulfate, sodium acetate, calcium nitrite and three isopropanols
Amine is combined in the ratio of 3:4:2:1；The anti-mud component is combined by odium stearate and ethylene glycol in 6:4 ratio；Institute
Stating anti-educing component is sorbierite.
A kind of preparation process of the dedicated early-strength admixture of prefabricated components concrete carries out as follows:
Step 1: weighing or preparing each component according to the proportion；
Step 2: agitator tank is added in polycarboxylic acids water reducing type mother liquor and polycarboxylic acids collapse protection type mother liquor, 90s or more is added water and stirred, is made
It is sufficiently mixed；
Step 3: accelerating component is added in mixed liquor made from step 2,120s or more is stirred, dissolves it sufficiently；
Step 4: anti-mud component is added in mixed liquor made from step 3,60s or more is stirred, dissolves it sufficiently；
Step 5: anti-educing component is added in mixed liquor made from step 4,30s or more is stirred, mixes them thoroughly, obtains
The dedicated early-strength admixture of prefabricated components concrete.
Comparative example 1
A kind of prefabricated components concrete special additive, the raw material including following weight percent:
Polycarboxylic acids water reducing type mother liquor 20%；
Polycarboxylic acids collapse protection type mother liquor 10%；
Anti- mud component 3%；
Anti-educing component 1%；
Water 66%.
Wherein, the polycarboxylic acids water reducing type mother liquor is acrylic polymer carboxylic acid mother liquor；The polycarboxylic acids collapse protection type mother liquor is
Isoamyl alcohol polyoxyethylene ether is birdsed of the same feather flock together carboxylic acid mother liquor；The anti-mud component it is compound in 6:4 ratio by odium stearate and ethylene glycol and
At；The anti-educing component is sorbierite.
A kind of preparation process of prefabricated components concrete special additive carries out as follows:
Step 1: weighing or preparing each component according to the proportion；
Step 2: agitator tank is added in polycarboxylic acids water reducing type mother liquor and polycarboxylic acids collapse protection type mother liquor, 90s or more is added water and stirred, is made
It is sufficiently mixed；
Step 3: anti-mud component is added in mixed liquor made from step 2,60s or more is stirred, dissolves it sufficiently；
Step 4: anti-educing component is added in mixed liquor made from step 3,30s or more is stirred, mixes them thoroughly, obtains
Prefabricated components concrete special additive.
Comparative example 2
Comparative example 2 is the dedicated early-strength admixture of prefabricated components concrete of the excellent benefit of Shandong company production performance.
Application Example
Additive prepared by the embodiment of the present invention 1 ~ 2 and comparative example 1 ~ 2 is subjected to application performance comparative test.Comparative test uses
Each material utilization amount of concrete be shown in Table 1, concrete 's air-containing control is 1.8% ~ 2.3%, water-binder ratio 0.40.Concrete
Compressive strength test is carried out according to " standard for test methods of mechanical properties of ordinary concrete " GB/T 50081-2002, curing temperature
25℃。
Each material utilization amount of 1 concrete of table/(kg/m3)
| Cement | Flyash | River sand | Rubble | Water |
| 320 | 80 | 890 | 910 | 160 |
Test result is as follows:
The 2 dedicated early-strength admixture of prefabricated components concrete of table
| Number | Volume | 1d intensity (MPa) | 3d intensity (MPa) |
| Embodiment 1 | 2.5% | 14.5 | 24.2 |
| Embodiment 2 | 2.5% | 15.5 | 26.5 |
| Comparative example 1 | 2.5% | 8.7 | 15.2 |
| Comparative example 2 | 2.5% | 7.4 | 14.6 |
The above is only a preferred embodiment of the present invention, it is noted that for those of ordinary skill in the art,
Under the premise of not departing from the invention design, several modifications and variations can also be made, these belong to protection of the invention
Range.
Claims (8)
1. a kind of dedicated early-strength admixture of prefabricated components concrete, it is characterised in that: by following component according to weight percent
Composition
Polycarboxylic acids water reducing type mother liquor 15-25%
Polycarboxylic acids collapse protection type mother liquor 6-15%
Accelerating component 6-12%
Anti- mud component 3-8%
Anti-educing component 1-3%
Surplus is water.
2. the dedicated early-strength admixture of prefabricated components concrete according to claim 1, it is characterised in that: the polycarboxylic acids
Water reducing type mother liquor is one of acrylic compounds or methacrylic polycarboxylic acids mother liquor.
3. the dedicated early-strength admixture of prefabricated components concrete according to claim 1, it is characterised in that: the polycarboxylic acids
Collapse protection type mother liquor is that isoamyl alcohol polyoxyethylene ether class or methyl allyl polyoxyethylene ether are birdsed of the same feather flock together one of carboxylic acid mother liquor.
4. the dedicated early-strength admixture of prefabricated components concrete according to claim 1, it is characterised in that: strong group of the morning
Divide and is combined by aluminum sulfate, sodium acetate, calcium nitrite and triisopropanolamine in the ratio of 3:4:2:1.
5. the dedicated early-strength admixture of prefabricated components concrete according to claim 1, it is characterised in that: the anti-mud group
Divide and is combined by odium stearate and ethylene glycol in the ratio of 6:4 or 7:3.
6. the dedicated early-strength admixture of prefabricated components concrete according to claim 1, it is characterised in that: the anti-isolation
Group is divided into sorbierite.
7. the preparation method of any one of the claim 1 ~ 6 dedicated early-strength admixture of prefabricated components concrete, including it is following
Step:
Step 1: weighing or preparing each component according to the proportion；
Step 2: agitator tank is added in polycarboxylic acids water reducing type mother liquor and polycarboxylic acids collapse protection type mother liquor, 90s or more is added water and stirred, is made
It is sufficiently mixed；
Step 3: accelerating component is added in mixed liquor made from step 2,120s or more is stirred, dissolves it sufficiently；
Step 4: anti-mud component is added in mixed liquor made from step 3,60s or more is stirred, dissolves it sufficiently；
Step 5: anti-educing component is added in mixed liquor made from step 4,30s or more is stirred, mixes them thoroughly, obtains
The dedicated early-strength admixture of prefabricated components concrete.
8. the application of described in any item dedicated early-strength admixtures of prefabricated components concrete according to claim 1 ~ 7, feature
Be: the dedicated early-strength admixture of prefabricated components concrete is equally applicable to prepare steam curing temperature in 30 DEG C of steamings below
Curing concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910061916.0A CN109678384A (en) | 2019-01-23 | 2019-01-23 | A kind of dedicated early-strength admixture of prefabricated components concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910061916.0A CN109678384A (en) | 2019-01-23 | 2019-01-23 | A kind of dedicated early-strength admixture of prefabricated components concrete |
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| CN109678384A true CN109678384A (en) | 2019-04-26 |
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| CN201910061916.0A Pending CN109678384A (en) | 2019-01-23 | 2019-01-23 | A kind of dedicated early-strength admixture of prefabricated components concrete |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111635162A (en) * | 2020-06-10 | 2020-09-08 | 广东创亨建设有限公司 | Green and environment-friendly mortar regulator and preparation method thereof |
| CN111689713A (en) * | 2020-06-22 | 2020-09-22 | 唐山市龙亿科技开发有限公司 | Special additive for concrete of prefabricated part and preparation method thereof |
| CN112851189A (en) * | 2021-03-05 | 2021-05-28 | 马永胜 | Concrete admixture and preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106478896A (en) * | 2016-10-31 | 2017-03-08 | 科之杰新材料集团有限公司 | A kind of preparation method of comprehensive polycarboxylate water-reducer |
| CN108129056A (en) * | 2018-01-11 | 2018-06-08 | 贵州天威建材科技有限责任公司 | A kind of special water-reducing agent of railway tunnel construction gunite concrete |
| CN109231876A (en) * | 2018-10-11 | 2019-01-18 | 济南大学 | A kind of early strong viscosity reduction type additive of pretensioned-prestressed tube pile concrete |
-
2019
- 2019-01-23 CN CN201910061916.0A patent/CN109678384A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106478896A (en) * | 2016-10-31 | 2017-03-08 | 科之杰新材料集团有限公司 | A kind of preparation method of comprehensive polycarboxylate water-reducer |
| CN108129056A (en) * | 2018-01-11 | 2018-06-08 | 贵州天威建材科技有限责任公司 | A kind of special water-reducing agent of railway tunnel construction gunite concrete |
| CN109231876A (en) * | 2018-10-11 | 2019-01-18 | 济南大学 | A kind of early strong viscosity reduction type additive of pretensioned-prestressed tube pile concrete |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111635162A (en) * | 2020-06-10 | 2020-09-08 | 广东创亨建设有限公司 | Green and environment-friendly mortar regulator and preparation method thereof |
| CN111689713A (en) * | 2020-06-22 | 2020-09-22 | 唐山市龙亿科技开发有限公司 | Special additive for concrete of prefabricated part and preparation method thereof |
| CN112851189A (en) * | 2021-03-05 | 2021-05-28 | 马永胜 | Concrete admixture and preparation method and application thereof |
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Application publication date: 20190426 |