CN108947313A - A kind of agent on crack resistance of concrete dispersing agent - Google Patents
A kind of agent on crack resistance of concrete dispersing agent Download PDFInfo
- Publication number
- CN108947313A CN108947313A CN201810951074.1A CN201810951074A CN108947313A CN 108947313 A CN108947313 A CN 108947313A CN 201810951074 A CN201810951074 A CN 201810951074A CN 108947313 A CN108947313 A CN 108947313A
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- CN
- China
- Prior art keywords
- agent
- crack resistance
- concrete
- liquor
- strength
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- 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
- 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
-
- 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)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of agent on crack resistance of concrete dispersing agent, belongs to technical field of concrete additives, is that the thinking compounded based on organic-flocculation material and inorganic flocculation material designs that a kind of anti-dispersion effect is good, early strength is high, the small agent on crack resistance of concrete dispersing agent of loss of strength.Although traditional flocculant major defect is that have apparent anti-dispersion effect, have the shortcomings that early strength is poor, loss of strength is big.Design that a kind of anti-dispersion effect is good, early strength is high, the small product of loss of strength is the object that the present invention studies.The present invention adopts the following technical scheme: a kind of agent on crack resistance of concrete dispersing agent, is divided into two component of solid agent and liquor, wherein the weight proportion of agent admittedly are as follows: cellulose ether 4%, silicon ash 93%, high hydroscopic resin 3%；The weight proportion of liquor are as follows: high-efficiency water-reducing agent of poly-carboxylic acid 86%, tributyl 14%.Gu the volume of agent is the 9.6% of cement consumption, liquor dosage is the 1.4% of cement consumption.The made dispersing agent of above scheme is suitble to solve foregoing problems.
Description
Technical field
The invention belongs to technical field of concrete additives.
Background technique
It when underwater concrete construction, is lost under water to solve cement slurry in concrete, concrete strength decline, isolation
The problems such as bleeding, needs added anti-dispersant in concrete.Anti-dispersant main component is flocculant, and the mechanism of action is divided into
Chemical factor and physical factor.Chemical factor is to lose suspended particles charge, becomes unstable particle, then assembles；Physics
Factor is to form floc sedimentation by bridge formation, suction-operated.Anti-dispersant used at present has two classes: anionic, such as algin
Sodium；It is non-ionic, such as causticity starch.These anti-dispersants are substantially based on existing natural macromolecule flocculating agent research and development,
There is apparent anti-dispersion effect, but early strength is low, loss of strength is big.Have in inorganic field silicon ash, bentonite preferable anti-
Dispersion effect, how based on the thinking that organic-flocculation material and inorganic flocculation material compound design a kind of anti-dispersion effect it is good,
Early strength is high, and the small product of loss of strength is the object that the present invention studies.
Summary of the invention
Traditional flocculant has the flocculant such as algin sodium of anionic；Flocculant in non-ion type such as causticity starch
Deng although their major defect is that have apparent anti-dispersion effect, it is scarce that there are early strengths is poor, loss of strength is big
Point, such as anti-dispersant algin sodium are used for the underwater concrete of C50, and 7 days compression strength only has 25 ~ 30MPa, 28 sky and water
Shaping test piece compressive strength rate only has 70% ~ 75% in lower shaping test piece and air.And organic flocculant is more unstable,
Perishable under high temperature, wet environment, price is also relatively high.For this purpose, how multiple based on organic-flocculation material and inorganic flocculation material
The thinking matched designs that a kind of anti-dispersion effect is good, early strength is high, and the small product of loss of strength is the object that the present invention studies.
The purpose of the present invention designs a kind of anti-dispersion based on the thinking that organic-flocculation material and inorganic flocculation material compound
Effect is good, early strength is high, the small agent on crack resistance of concrete dispersing agent of loss of strength.
In order to solve technical problem, the present invention adopts the following technical scheme: a kind of agent on crack resistance of concrete dispersing agent, be divided into solid agent and
Two component of liquor, wherein the weight proportion of agent admittedly are as follows: cellulose ether 4%, silicon ash 93%, high hydroscopic resin 3%；The weight of liquor is matched
Than are as follows: high-efficiency water-reducing agent of poly-carboxylic acid 86%, tributyl 14%.Gu the volume of agent is the 9.6% of cement consumption, liquor dosage is cement
The 1.4% of dosage.
Below with reference to one embodiment, the present invention is described in detail:
A kind of agent on crack resistance of concrete dispersing agent is divided into two component of solid agent and liquor, wherein the weight proportion of agent admittedly are as follows: cellulose ether 4%,
Silicon ash 93%, high hydroscopic resin 3%；The weight proportion of liquor are as follows: high-efficiency water-reducing agent of poly-carboxylic acid 86%, tributyl 14%.Gu agent is mixed
Amount is the 9.6% of cement consumption, and liquor dosage is the 1.4% of cement consumption.
Agent on crack resistance of concrete dispersing agent is obtained with when preparation method according to above-mentioned, is in water velocity by application of dispersant
1.5 metre per second (m/s)s, underwater casting drop is in 1.5 meters of underwater concrete.The dispersion of test underwater concrete, resistance to compression in 7 days
Intensity, 28 days underwater and air in test specimen compressive strength rate.
The weight proportion for the concrete each component used in experiment are as follows: 32 parts of P.O42.5 cement, 73 parts of river sand (middle sand),
33 parts of the rubble of partial size 5-10mm, 44 parts of the rubble of partial size 10-15mm, 9 parts of 33 parts of rubble, the water of partial size 15-30mm, anti-dispersion
Agent: Gu 3.07 parts of agent, 0.45 part of liquor.
Test result: underwater concrete enter water not dissipate, water quality is limpid, dispersion resistance is good；7 days compression strength of underwater concrete
Reach 35.4MPa, compression strength reaches 58.3MPa within 28 days;Shaping test piece compressive strength rate in 28 days underwater shaping test pieces and air
Reach 91.5%.
Thus above-mentioned data can be seen that addition anti-dispersant provided by the invention, and dispersion effect is not good for underwater concrete,
Early strength improves about 28%, and the compressive strength rate of shaping test piece improves about 26% in 28 days underwater shaping test pieces and air.
Agent on crack resistance of concrete dispersing agent provided by the invention greatly improves mixed while anti-dispersion effect under guaranteeing concrete water
Molding test specimen ratio in solidifying soil early strength and final strength, with air, loss of strength are small.Such as the underwater concrete of C50 7 days
Compression strength can achieve 35MPa, and the compressive strength rate of 28 days underwater shaping test pieces and shaping test piece in air can reach
91.5%。
Claims (6)
1. a kind of agent on crack resistance of concrete dispersing agent adopts the following technical scheme that a kind of agent on crack resistance of concrete dispersing agent, is divided into solid agent and liquor two
Component, wherein the weight proportion of agent admittedly are as follows: cellulose ether 4%, silicon ash 93%, high hydroscopic resin 3%；The weight proportion of liquor are as follows: poly-
Carboxylic acid high efficiency water reducing agent 86%, tributyl 14%；Gu the volume of agent is the 9.6% of cement consumption, liquor dosage is cement consumption
1.4%。
2. a kind of agent on crack resistance of concrete dispersing agent according to claim 1, it is characterised in that the step (1) is with solid agent and liquor
Two components.
3. a kind of agent on crack resistance of concrete dispersing agent according to claim 1, it is characterised in that the step (1) consolidates the weight proportion of agent
Are as follows: cellulose ether 4%, silicon ash 93%, high hydroscopic resin 3%.
4. a kind of agent on crack resistance of concrete dispersing agent according to claim 1, it is characterised in that the weight proportion of step (1) liquor
Are as follows: high-efficiency water-reducing agent of poly-carboxylic acid 86%, tributyl 14%.
5. a kind of agent on crack resistance of concrete dispersing agent according to claim 1, it is characterised in that the volume that the step (1) consolidates agent is water
The 9.6% of mud dosage.
6. a kind of agent on crack resistance of concrete dispersing agent according to claim 1, it is characterised in that step (1) the liquor dosage is cement
The 1.4% of dosage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810951074.1A CN108947313A (en) | 2018-08-21 | 2018-08-21 | A kind of agent on crack resistance of concrete dispersing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810951074.1A CN108947313A (en) | 2018-08-21 | 2018-08-21 | A kind of agent on crack resistance of concrete dispersing agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108947313A true CN108947313A (en) | 2018-12-07 |
Family
ID=64470911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810951074.1A Pending CN108947313A (en) | 2018-08-21 | 2018-08-21 | A kind of agent on crack resistance of concrete dispersing agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108947313A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698095A (en) * | 2019-11-26 | 2020-01-17 | 衡阳县海华水泥有限责任公司 | Cement and preparation method thereof |
| CN114751672A (en) * | 2022-04-11 | 2022-07-15 | 中建西部建设湖南有限公司 | Concrete underwater non-dispersant, preparation method and application thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075471A (en) * | 1991-06-25 | 1993-08-25 | 日本国土开发株式会社 | Concrete composition |
| JP4596130B2 (en) * | 2004-08-24 | 2010-12-08 | 信越化学工業株式会社 | Self-leveling composition |
| CN106977160A (en) * | 2017-05-08 | 2017-07-25 | 天津市滨涛混凝土有限公司 | A kind of non-dispersible underwater concrete and preparation method thereof |
-
2018
- 2018-08-21 CN CN201810951074.1A patent/CN108947313A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1075471A (en) * | 1991-06-25 | 1993-08-25 | 日本国土开发株式会社 | Concrete composition |
| JP4596130B2 (en) * | 2004-08-24 | 2010-12-08 | 信越化学工業株式会社 | Self-leveling composition |
| CN106977160A (en) * | 2017-05-08 | 2017-07-25 | 天津市滨涛混凝土有限公司 | A kind of non-dispersible underwater concrete and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 刘娟红，宋少民: "《绿色高性能混凝土技术与工程应用》", 31 January 2011, 中国电力出版社 * |
| 郭自利，周鼎，裴正南: ""水下浇筑混凝土用抗分散剂试验研究"", 《混凝土》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110698095A (en) * | 2019-11-26 | 2020-01-17 | 衡阳县海华水泥有限责任公司 | Cement and preparation method thereof |
| CN114751672A (en) * | 2022-04-11 | 2022-07-15 | 中建西部建设湖南有限公司 | Concrete underwater non-dispersant, preparation method and application thereof |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20181207 |
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