CN101805143A - Anti-interference anticracking agent for concrete and preparation method thereof - Google Patents
Anti-interference anticracking agent for concrete and preparation method thereof Download PDFInfo
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- CN101805143A CN101805143A CN 201010123304 CN201010123304A CN101805143A CN 101805143 A CN101805143 A CN 101805143A CN 201010123304 CN201010123304 CN 201010123304 CN 201010123304 A CN201010123304 A CN 201010123304A CN 101805143 A CN101805143 A CN 101805143A
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Abstract
The invention relates to an anti-interference anticracking agent for concrete, which comprises a setting regulator for shortening the interfered period of the concrete, a hydramine admixture for enhancing the early strength of the concrete, an expansion function admixture for enhancing the self-healing rate of the interfered concrete, a powdery early-strength admixture for enhancing the early strength of the concrete, and a fiber function admixture for enhancing the anticracking property of the concrete. The anti-interference anticracking agent is composed of a liquid component and a solid component, wherein the liquid component comprises the setting regulator and the hydramine admixture, and the solid component comprises the expansion function admixture, the fiber function admixture and the powdery early-strength admixture. The preparation method comprises the following steps: preparing the liquid component of the anti-interference anticracking agent, preparing the solid component of the anti-interference anticracking agent, and evenly mixing the liquid component and the solid component in proportion for use. The invention can be used for improving the anti-interference anticracking property of the concrete, so that the concrete can perform more functions in bridge repairing. The anti-interference anticracking agent is an admixture which has the advantages of controllable composition and diversified products, and is suitable for mass production.
Description
Technical field
The invention belongs to building material field, relate to concrete admixture, concrete disturbance rejection technology, relate to the method for improving concrete anti-interference anticracking performance.
Background technology
Western China is vast in territory, the bridge enormous amount, material of construction is a large amount of use be concrete, along with country to development of the West Regions constantly deeply, western traffic flow is also in continuous increase.Because wherein a lot of bridges all are bridges of building during the sixties in last century to the seventies, can't satisfy the requirement of present traffic, therefore need reinforcement and transform.How under the unbroken condition of traffic, it to be transformed into a present problem.
Reinforced concrete at present commonly used has sprayed concrete, self-compacting concrete and fast hardening concrete.Sprayed concrete be by means of spray machinery with the concrete high-velocity jet to being subjected to a kind of concrete that setting and harden forms on the spray plane.The less water cement ratio of its general employing, and have higher intensity and favorable durability, the building structure infringement that has very high cohesive strength, sprayed concrete to be used for repairing to cause with brick, stone, concrete and steel etc. because of reasons such as earthquake, burn into overload, vibrations more.Self-compacting high performance concrete is under than the low water binder ratio condition, by the composite highly effective admixture, rationally use flyash isoreactivity adulterant, the flowability of the general flowing concrete of ratio of optimizing the grating of concrete aggregate and making is better, possesses better flowability, passes through the reinforcing bar ability, resists the type material of separating power.Self-compacting concrete only depends on deadweight just can be filled into each corner of complex model in construction, has even self-compacting processability, has excellent mechanical property and endurance quality after the sclerosis simultaneously.These performances can solve the problem in the reinforcing engineering.Special fast dry concrete adopts some exotic materialss, as quick hardening sulphoaluminate cement, steel fiber, accelerator for hardening etc., the cohesive force that satisfies new-old concrete is strong, strength development is fast, and shrinkage is little, and splitting resistance is strong, performances such as good endurance are used for the repairing reinforcing of railway, highway bridge and road surface, repair fast cleverly.
Main line is economized by current state, and in the increase of labour bridge owing to volume of transport and carload lot tonnage, bridge defect is on the rise, and engineering maintenance department needs timely maintenance and reinforcing.But because the volume of traffic is bigger, close traffic can increase the Vehicle By-pass distance, and social influence is bigger, does not sometimes allow close traffic.The transportation condition in west area makes us more can not suspend traffic to bridge strengthening, and the bridge that needs research application disturbance rejection concrete that need are repaired is reinforced.
Research disturbance rejection concrete has economic benefits clearly, because the time that suspends traffic is long more, the financial loss of bringing is big more, and data statistics is arranged, it is millions of that the financial loss that suspended traffic a hour just reaches, and therefore then can avoid this loss if can improve the performance of concrete disturbance rejection.
Summary of the invention
The invention provides the method for a kind of concrete batching with anti-interference anticracking agent.Concrete operation method is as described below:
This anti-interference anticracking agent of A mainly is made up of two portions, is respectively liquid composition and solids fraction.Liquid composition comprises the adjustable solidification agent that can regulate concrete coagulating time, as the liquid adjustable solidification agent (main component is Tai-Ace S 150 and Sodium Fluoride) of NEW TYPE OF COMPOSITE, with have early powerful alcamines admixture such as trolamine, other feasible admixtures have tri-isopropanolamine, diethanolamine, solids fraction comprises the expansion function admixture sulfoaluminate clinker-alunite expansion function admixture that contains self-healing function, other are feasible lime expansion function admixture, compound expansion function admixture, with fiber function admixture such as polypropylene fibre that anti-cracking function is arranged, other are feasible organic fibre class function admixture intimate with it, with early strong admixture of powder such as NaCl, other are feasible admixture calcium chloride, Repone K, chloride salt hardening accelerator such as aluminum chloride.
The liquid composition of B preparation anti-interference anticracking agent, press mass ratio (250-350): 1 mixed adjustable solidification agent and alcamines admixture, similar accent coagulates effect (mainly judging according to concrete initial set to final setting time section) to dissimilar adjustable solidification agents and potent fruit morning (mainly judging according to early age strength of concrete) is debugged according to having to the reagent that provides with alcamines admixture ratio, mainly shortens the concrete disturbed phase and improves early age strength of concrete.
The solids fraction of C preparation anti-interference anticracking agent, with expansion function admixture, fiber function admixture and powder hardening accelerator are pressed mass ratio (40-60): 1: mixed (4-6) is even, dissimilar expansion function admixtures, fiber function admixture has similar expansion effect (mainly judging according to the concrete strength development) with powder hardening accelerator ratio basis to the reagent that provides, effect of prestressed (mainly judging according to the concrete surface crack area) and potent fruit morning (mainly judging according to early age strength of concrete) are debugged, and are mainly used to improve concrete self-healing ability, splitting resistance and early strength.
When D uses liquid composition and solids fraction are pressed mass ratio 1: (1-2) mixed is even, for can improving the liquid composition proportion in right amount, expansion effect and effect of prestressed had higher requirements to improve solids fraction in right amount having time of coagulation than high requirement.
Further, in step B, adjustable solidification agent and alcamines admixture are pressed mass ratio (250-350): 1 mixed, mix by homogenizer (1100-1600 rev/min), and be placed in the closed container.
In step C, expansion function admixture, fiber function admixture and powder hardening accelerator are pressed mass ratio (40-60): 1: mixed (4-6) mixes by homogenizer (1100-1600 rev/min), and carries out drying treatment.
In step D, liquid composition and solids fraction are pressed mass ratio 1: mixed (1-2) promptly can be used on the concrete then.Among the present invention, adjustable solidification agent utilizes chemical reaction, and concrete mortar is condensed rapidly, shorten the concrete disturbed phase (in this period, concrete be disturbed the back loss of strength bigger, show that according to a large amount of test-results mainly be to the final setting time section this period at concrete initial set).Alcamines admixture and powder hardening accelerator are compound mainly to be in order to improve early age strength of concrete; The utilization of expansion function admixture generates material such as the ettringite with certain expansion characteristics in the concrete coagulation process of setting, is used to improve the self-healing rate (self-repairing capability) of concrete after disturbed; The anti-contracility polypropylene fibre helps to reduce concrete infiltration, and reduces its shrinking percentage under plastic state, therefore is used to improve concrete splitting resistance.
Embodiment
Be described in further detail below in conjunction with example:
Example one
A kind of concrete that meets the anti-interference anticracking standard, design strength grade are C40.
Preparation anti-interference anticracking agent liquid parts, adjustable solidification agent (mainly influences concrete and transfers the time of coagulating, can change volume according to concrete construction requirement, it is poor to final setting time that the raising volume can reduce concrete initial set, the volume scope is 4%～8%, the optimum mix amount is 6%) effective content (6%) and trolamine (mainly influence early age strength of concrete, can change volume according to concrete construction requirement, improve volume and can improve early age strength of concrete in volume scope 0.01%～0.06%, the optimum mix amount is 0.02%) effective content (0.02%) presses the mixed of mass ratio (300: 1).By high-speed stirring it is mixed, prepare the anti-interference anticracking agent liquid composition.
Preparation anti-interference anticracking agent solids fraction, expansion function admixture (mainly influences the concrete self-repairing capability, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 4%～12% can improve the concrete self-repairing capability, the optimum mix amount is 9%) effective content (9%), fiber function admixture (mainly influences concrete capacity against cracking, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 0%～0.5% can improve concrete capacity against cracking, the optimum mix amount is 0.2%) effective content (0.2%) and NaCl (mainly influence early age strength of concrete, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 0%～1.5% can improve early age strength of concrete, and the optimum mix amount is 0.9%) effective content (0.9%) presses the mixed of mass ratio (50: 1: 5).
Select for use 42.5 ordinary Portland cements as gelling material, gelling material, aggregate, sand, anti-interference anticracking agent solids fraction mix according to mass ratio shown in the table 1, and the anti-interference anticracking agent liquid composition is mixed with water, add stirrer and stir.
Table 1 is mixed the C40 concrete of anti-interference anticracking and is recommended proportioning (every cubic metre)
| Component | Quality kg |
| Cement | ??433 |
| Sand | ??670 |
| Aggregate | ??1015 |
| Water | ??181 |
| Water reducer | ??2.17 |
| The anti-interference anticracking agent liquid composition | ??26 |
| The anti-interference anticracking agent solids fraction | ??39 |
Concrete initial set according to the moulding of table 1 cooperation table institute has shortened 3 hours to the final setting time difference, and promptly the disturbed phase has shortened 3 hours, has reduced the disturbed probability of concrete, has improved the disturbed property of concrete; Be not subjected to 95% of turbulent concrete strength, improved concrete self-healing rate to a great extent, improved the disturbed property of concrete can reach by late strength of concrete; The surface crack area has reduced 50%, has strengthened concrete splitting resistance, has improved the disturbed property of concrete.
Example two
Preparation anti-interference anticracking agent liquid parts, adjustable solidification agent (mainly influences concrete and transfers the time of coagulating, can change volume according to concrete construction requirement, it is poor to final setting time that the raising volume can reduce concrete initial set, the volume scope is 4%～8%, the optimum mix amount is 6%) effective content (3%)) and trolamine (mainly influence early age strength of concrete, can change volume according to concrete construction requirement, improve volume and can improve early age strength of concrete in volume scope 0.01%～0.06%, the optimum mix amount is 0.02%) effective content (0.02%) presses the mixed of mass ratio (150: 1).By high-speed stirring it is mixed, prepare the anti-interference anticracking agent liquid composition.
Preparation anti-interference anticracking agent solids fraction, expansion function admixture (mainly influences the concrete self-repairing capability, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 4%～12% can improve the concrete self-repairing capability, the optimum mix amount is 9%) effective content (6%), fiber function admixture (mainly influences concrete capacity against cracking, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 0%～0.5% can improve concrete capacity against cracking, the optimum mix amount is 0.2%) effective content (0.1%) and NaCl (mainly influence early age strength of concrete, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 0%～1.5% can improve early age strength of concrete, and the optimum mix amount is 0.9%) effective content (0.9%) presses the mixed of mass ratio (60: 1: 10).
Select for use 42.5 ordinary Portland cements as gelling material, gelling material, aggregate, sand, anti-interference anticracking agent solids fraction mix according to mass ratio shown in the table 2, and the anti-interference anticracking agent liquid composition is mixed with water, add stirrer and stir.
Table 2 is mixed the C40 concrete of anti-interference anticracking and is recommended proportioning (every cubic metre)
| Component | Quality kg |
| Cement | ??433 |
| Sand | ??670 |
| Aggregate | ??1015 |
| Water | ??181 |
| Water reducer | ??2.17 |
| The anti-interference anticracking agent liquid composition | ??18 |
| The anti-interference anticracking agent solids fraction | ??30 |
Concrete initial set according to the moulding of table 2 cooperation table institute has shortened 2 hours to the final setting time difference, and promptly the disturbed phase has shortened 2 hours, has reduced the disturbed probability of concrete, has improved the disturbed property of concrete; Be not subjected to 80% of turbulent concrete strength, improved concrete self-healing rate on the bigger degree, improved the disturbed property of concrete can reach by late strength of concrete; The surface crack area has reduced 25%, has strengthened concrete splitting resistance, has improved the disturbed property of concrete.
Example three
Preparation anti-interference anticracking agent liquid parts, adjustable solidification agent (mainly influences concrete and transfers the time of coagulating, can change volume according to concrete construction requirement, it is poor to final setting time that the raising volume can reduce concrete initial set, the volume scope is 4%～8%, the optimum mix amount is 6%) effective content (8%) and trolamine (mainly influence early age strength of concrete, can change volume according to concrete construction requirement, improve volume and can improve early age strength of concrete in volume scope 0.01%～0.06%, the optimum mix amount is 0.02%) effective content (0.02%) presses the mixed of mass ratio (400: 1).By high-speed stirring it is mixed, prepare the anti-interference anticracking agent liquid composition.
Preparation anti-interference anticracking agent solids fraction, expansion function admixture (mainly influences the concrete self-repairing capability, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 4%～12% can improve the concrete self-repairing capability, the optimum mix amount is 9%) effective content (12%), fiber function admixture (mainly influences concrete capacity against cracking, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 0%～0.5% can improve concrete capacity against cracking, the optimum mix amount is 0.2%) effective content (0.4%) and NaCl (mainly influence early age strength of concrete, can change volume according to concrete construction requirement, in the volume scope is to improve volume in 0%～1.5% can improve early age strength of concrete, and the optimum mix amount is 0.9%) effective content (0.9%) presses the mixed of mass ratio (30: 1: 2).
Select for use 42.5 ordinary Portland cements as gelling material, gelling material, aggregate, sand, anti-interference anticracking agent solids fraction mix according to mass ratio shown in the table 3, and the anti-interference anticracking agent liquid composition is mixed with water, add stirrer and stir.
Table 3 is mixed the C40 concrete of anti-interference anticracking and is recommended proportioning (every cubic metre)
| Component | Quality kg |
| Cement | ??433 |
| Sand | ??670 |
| Aggregate | ??1015 |
| Water | ??181 |
| Water reducer | ??2.17 |
| The anti-interference anticracking agent liquid composition | ??30 |
| The anti-interference anticracking agent solids fraction | ??50 |
Concrete initial set according to the moulding of table 3 cooperation table institute has shortened 3.2 hours to the final setting time difference, and promptly the disturbed phase has shortened 3.2 hours, has reduced the disturbed probability of concrete, has improved the disturbed property of concrete; Be not subjected to 94% of turbulent concrete strength, improved concrete self-healing rate to a great extent, improved the disturbed property of concrete can reach by late strength of concrete; The surface crack area has reduced 60%, has strengthened concrete splitting resistance, has improved the disturbed property of concrete.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.The person skilled in the art obviously can easily make various modifications to these embodiment, and needn't pass through performing creative labour being applied in the General Principle of this explanation among other embodiment.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not breaking away from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (9)
1. anti-interference anticracking agent for concrete is characterized in that comprising in the anti-interference anticracking agent:
Adjustable solidification agent utilizes chemical reaction, and concrete mortar is condensed rapidly, shortens the concrete disturbed phase;
The alcamines admixture is in order to improve early age strength of concrete;
Expansion function admixture makes concrete produce controllable expansion reduce to shrink in the concrete coagulation process of setting, is used to improve the self-healing rate of concrete after disturbed;
Powder hardening accelerator is in order to improve early age strength of concrete;
Fiber function admixture helps to reduce concrete infiltration, and reduces its shrinking percentage under plastic state, is used to improve concrete splitting resistance.
2. anti-interference anticracking agent for concrete according to claim 1 is characterized in that:
This anti-interference anticracking agent comprises liquid composition and solids fraction, and liquid composition comprises adjustable solidification agent and alcamines admixture, and solids fraction comprises expansion function admixture, fiber function admixture and powder hardening accelerator.
3. anti-interference anticracking agent for concrete according to claim 2 is characterized in that: the mass ratio of described anti-interference anticracking agent liquid composition and solids fraction is 2: 3.
4. anti-interference anticracking agent for concrete according to claim 1 is characterized in that: the alcamines admixture is trolamine or tri-isopropanolamine or diethanolamine.
5. anti-interference anticracking agent for concrete according to claim 1 is characterized in that: described fiber function admixture is the special-purpose anti-contracility polypropylene fibre of concrete.
6. anti-interference anticracking agent for concrete according to claim 2 is characterized in that: described liquid composition comprises that mass ratio is 300: 1 adjustable solidification agent and an alcamines admixture.
7. anti-interference anticracking agent for concrete according to claim 2 is characterized in that: described solids fraction comprises that mass ratio is 50: 1: 5 expansion function admixture, fiber function admixture and a powder hardening accelerator.
8. the preparation method of the described anti-interference anticracking agent for concrete of claim 1 is characterized in that:
(1) liquid composition of preparation anti-interference anticracking agent is pressed mass ratio (250-350): 1 mixed adjustable solidification agent and alcamines admixture;
(2) solids fraction of preparation anti-interference anticracking agent, expansion function admixture, fiber function admixture and powder hardening accelerator are pressed mass ratio (40-60): 1: mixed (4-6) is even
When (3) using liquid composition and solids fraction are pressed mass ratio 1: (1-2) mixed is even, for can improving the liquid composition proportion in right amount, expansion effect and effect of prestressed had higher requirements to improve solids fraction in right amount having time of coagulation than high requirement.
9. the preparation method of anti-interference anticracking agent for concrete according to claim 8, it is characterized in that: in step (1), adjustable solidification agent and alcamines admixture are pressed mass ratio (250-350): 1 mixed, mix by the speed of homogenizer, be placed in the closed container with 1100-1600 rev/min;
In step (2), expansion function admixture, fiber function admixture and powder hardening accelerator mix by the speed of homogenizer with 1100-1600 rev/min, and carry out drying treatment by described mixed.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030492A (en) * | 2010-11-03 | 2011-04-27 | 金树青 | Anti-cracking agent for plastic shrinkage cracks of pumping concrete |
| CN102060488A (en) * | 2010-11-26 | 2011-05-18 | 同济大学 | Anti-disturbance concrete and preparation method thereof |
| CN103342503A (en) * | 2013-06-26 | 2013-10-09 | 俞锡贤 | Masonry plastering anticracking agent |
| CN106830729A (en) * | 2017-01-22 | 2017-06-13 | 西安汉河环保科技有限公司 | A kind of oblique additional agent materials of prestressed concrete HK and preparation method thereof |
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| CN101172808A (en) * | 2007-10-25 | 2008-05-07 | 南京派尼尔科技实业有限公司 | High crack-proof, impervious composite material for concrete and producing method thereof |
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| US5348583A (en) * | 1992-01-28 | 1994-09-20 | W. R. Grace & Co.-Conn. | Hydraulic cement set-accelerating admixtures incorporating glycols |
| CN1213656A (en) * | 1998-10-10 | 1999-04-14 | 王宗廷 | Solid hydramine concrete early strength agent |
| CN101172808A (en) * | 2007-10-25 | 2008-05-07 | 南京派尼尔科技实业有限公司 | High crack-proof, impervious composite material for concrete and producing method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102030492A (en) * | 2010-11-03 | 2011-04-27 | 金树青 | Anti-cracking agent for plastic shrinkage cracks of pumping concrete |
| CN102060488A (en) * | 2010-11-26 | 2011-05-18 | 同济大学 | Anti-disturbance concrete and preparation method thereof |
| CN103342503A (en) * | 2013-06-26 | 2013-10-09 | 俞锡贤 | Masonry plastering anticracking agent |
| CN106830729A (en) * | 2017-01-22 | 2017-06-13 | 西安汉河环保科技有限公司 | A kind of oblique additional agent materials of prestressed concrete HK and preparation method thereof |
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Application publication date: 20100818 |