CN104446642B - Concrete smear type surface time delay retarder and its application process - Google Patents
Concrete smear type surface time delay retarder and its application process Download PDFInfo
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- CN104446642B CN104446642B CN201410718947.6A CN201410718947A CN104446642B CN 104446642 B CN104446642 B CN 104446642B CN 201410718947 A CN201410718947 A CN 201410718947A CN 104446642 B CN104446642 B CN 104446642B
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Abstract
The present invention relates to concrete retarder, specifically a kind of concrete smear type surface time delay retarder and its application process for the treatment of concrete mat surface.The time delay retarder is made up of the raw material of following portions by weight：4~6 parts of white sugar, 2~3 parts of citric acid, 13~15 parts of sodium gluconate, 10~12 parts of tartaric acid, 1~2 part of borax, 12~16 parts of maltodextrin, 0.5~1 part of methylcellulose, 0.5~1 part of preservative, 57.5~43.5 parts of water；Using：Time delay retarder is smeared in template surface before concrete blinding formwork, makes to form one layer of coarse but water-soluble time delay slow setting agent film in template；After maintenance, the demoulding, smooth cement surface is fallen by washing away concrete surface with press water, expose the mat surface of aggregate.It is simple to operate invention replaces original cumbersome mat surface processing method, construction cost is reduced, there is no any injury to other positions of concrete, and dust pollution can be eliminated.
Description
Technical field
The present invention relates to concrete retarder, specifically a kind of concrete smear type table for the treatment of concrete mat surface
Face time delay retarder and its application process.
Background technology
In modern architecture engineering construction, concrete is essential engineering material.The stirring of concrete, transport,
The quality of links construction quality, the security for directly influencing the quality of engineering and using such as pour, conserve.In concrete
Work progress in, because the diversity of structure and the inconsistency of structure section area generally require repeatedly to pour and could be formed
The concrete structure form of design requirement, thereby produces the problem that new-old concrete connects stubble.In order that new-old concrete is fine
Bonding be integrally formed, it is necessary to dabbing treatment is carried out to the surface that original concrete is contacted with novel concrete.Namely remove
Concrete smooth surface through solidifying exposes mat surface.The quality of concrete mat surface treatment directly affects linking new and old concrete
Effect.
Traditional mat surface processing method is constructed using instruments such as electric hammer, pneumatic pick, drill rods, and these constructions are all present
Labour intensity is big, inefficiency, aggregate expose the defects such as uneven, dust elegant everywhere, pollution environment, construction cost be high,
And vibration easily makes concrete surface crackle occur to cause quality problems.
CN200480030929 discloses a kind of using vegetable oil and its derivative or animal oil and its derivative+sugar or salt
Or the smear type time delay surface retarders of acid, but retarder effect is not notable.
The content of the invention
Defect of the present invention for traditional construction technique, there is provided one kind can improve production efficiency, reduce construction cost
Concrete smear type surface time delay retarder and its application process.
The technical solution adopted by the present invention is：
A kind of concrete smear type surface time delay retarder, is made up of the raw material of following portions by weight：4~6 parts of white sugar, lemon
2~3 parts of lemon acid, 13~15 parts of sodium gluconate, 10~12 parts of tartaric acid, 1~2 part of borax, 12~16 parts of maltodextrin, methyl
0.5~1 part of cellulose, 0.5~1 part of preservative, 57.5~43.5 parts of water；Above-mentioned each raw material weighs mixture in container in proportion
In, stir.
Preferably, concrete smear type surface time delay retarder, is made up of the raw material of following portions by weight：5 parts of white sugar,
2.5 parts of citric acid, 14 parts of sodium gluconate, 11 parts of tartaric acid, 1.5 parts of borax, 14 parts of maltodextrin, methylcellulose 0.75
Part, 0.75 part of preservative, 50.5 parts of water.
The application process of above-mentioned concrete smear type surface time delay retarder, is carried out in the steps below：
（1）Before the concrete blinding formwork for needing to do mat surface, last layer is smeared in template surface with brush or roller
Time delay retarder, is allowed to air-dry, and makes to form one layer of coarse but water-soluble time delay slow setting agent film in template；
（2）Casting concrete, the water in concrete makes time delay retarder Film Fractionation, and release delay retarder is penetrated into and connect
In the concrete of contacting surface, summer concrete curing 3 days, steam-cured 10 hours of cold weather concrete component；
（3）Concrete surface is washed away with press water, is allowed to expose aggregate and is reached the undisguised depth of design requirement.
Mechanism of the present invention is summarized as follows：
（1）White sugar, citric acid, sodium gluconate, tartaric acid, maltodextrin, methylcellulose are all organic matters, white sugar,
Maltodextrin, methylcellulose have surface-active, and they produce absorption on solid-liquid interface, change solid particle surfaces
Matter, forms one layer of retarder film layer that can suppress hydrated reaction of cement, so as to cause the extension of concrete coagulating time.
（2）Sodium gluconate, tartaric acid, citric acid are organic monoacids, show acidity, due to cement clinker mineral aquation and
Hardening process is carried out in the basic conditions, it is suppressed that the aquation and setting rate of clinker；Sodium gluconate, winestone
Acid, citric acid are easily combined with calcium, generate corresponding calcium salt, reduce the concentration of calcium in hydrolysis product of cement, it is suppressed that silicic acid three
The aquation of calcium, reduces hardened product, hydrated cementitious induction period is extended and slow setting.
（3）Borax is acted on:Double salt (such as entringite) is generated with cement, cement minerals particle surface is deposited in, water is prevented
Contact of the mud particle with water, thus delayed the aquation of cement, play deferred action.
（4）The effect of preservative is：Prevent the retarder for preparing from going bad after placing after a while.
Using the present invention of above-mentioned technical proposal, compared with prior art, its advantage is：
After concrete final set or after prefabricated part steam curing terminates the demoulding, being washed away with press water needs to do mat surface
Concrete surface, you can reach the concrete mat surface of design requirement.The caking property of later stage casting concrete also meets design will
Ask.It is simple to operate invention replaces original cumbersome construction method, there is no any injury to other positions of concrete, save
The substantial amounts of working time, labor strength is reduced, eliminate dust pollution, saved financial resources, material resources, reduced and be constructed into
This.The production operation of time delay retarder simply, not by place is limited, and raw materials are essentially organic matter, realize green
Color environmental protection concept.
According to cement type, strength grade of concrete, additive species, the environment temperature of early curing, flexibly control punching
Brush time and the consumption of time delay retarder, can control the depth of mat surface aggregate exposure, to reach optimal mat surface treatment effect
Really.
Specific embodiment
The present invention is described in detail with reference to embodiments in detail, purpose is only that and is better understood from present invention, and the cited case is not right
The present invention constitutes any limitation.
The present embodiment explanation as a example by preparing 100g smear type time delay retarder.
Dispensing：White sugar 5g, citric acid 2.5g, sodium gluconate 14g, tartaric acid 11g, borax 1.5g, maltodextrin 14g,
Methylcellulose 0.75g, preservative 0.75g, water 50.5g.
Prepare:By white sugar, citric acid, sodium gluconate, tartaric acid, borax, maltodextrin, methylcellulose, preservative
It is put into a container after weighing well, load weighted water is added after mixing and stirring, continues to stir.
Using：Concrete prefabricated element, before the concrete blinding formwork for needing to do mat surface, with brush in template surface
The thicker time delay retarder of last layer is smeared, is allowed to air-dry, made to be formed in template one layer of coarse but water-soluble time delay and delay
Solidifying agent film；Casting concrete prefabricated components, have poured rear steam curing 10 hours, and now the water in concrete makes time delay slow setting
Agent film is dissolved, and release delay retarder is penetrated into the concrete of contact surface；The concrete prefabricated element demoulding, is rushed with press water
Brush concrete surface is allowed to remove smooth cement surface, exposes the mat surface of aggregate.
Claims (1)
1. a kind of application process of concrete smear type surface time delay retarder, described concrete smear type surface time delay slow setting
Agent is made up of the raw material of following portions by weight：4~6 parts of white sugar, 2~3 parts of citric acid, 13~15 parts of sodium gluconate, tartaric acid
10~12 parts, 1~2 part of borax, 12~16 parts of maltodextrin, 0.5~1 part of methylcellulose, 0.5~1 part of preservative, water 57.5
~43.5 parts；Above-mentioned each raw material weighs mixture in container in proportion, stirs；Characterized in that, carrying out in the steps below：
（1）Before the concrete blinding formwork for needing to do mat surface, last layer time delay is smeared in template surface with brush or roller
Retarder, is allowed to air-dry, and makes to form one layer of coarse but water-soluble time delay slow setting agent film in template；
（2）Casting concrete, the water in concrete makes time delay retarder Film Fractionation, and release delay retarder penetrates into contact surface
Concrete in, summer concrete curing 3 days, steam-cured 10 hours of cold weather concrete component；
（3）Concrete surface is washed away with press water, is allowed to expose aggregate and is reached the undisguised depth of design requirement.
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| CN201410718947.6A CN104446642B (en) | 2014-12-03 | 2014-12-03 | Concrete smear type surface time delay retarder and its application process |
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| CN201410718947.6A CN104446642B (en) | 2014-12-03 | 2014-12-03 | Concrete smear type surface time delay retarder and its application process |
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| CN104446642A CN104446642A (en) | 2015-03-25 |
| CN104446642B true CN104446642B (en) | 2017-06-16 |
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| CN110342850A (en) * | 2019-07-17 | 2019-10-18 | 南京永能新材料有限公司 | A kind of efficient retarder for cement and preparation method thereof |
| CN112299741A (en) * | 2019-07-26 | 2021-02-02 | 天津富乐佳科技有限公司 | Concrete surface retarder and application method thereof |
| CN112299743A (en) * | 2019-08-02 | 2021-02-02 | 天津富乐佳科技有限公司 | Concrete surface retarder and production process and use method thereof |
| CN110452018B (en) * | 2019-09-23 | 2022-03-11 | 交通运输部公路科学研究所 | High-temperature-resistant cement concrete pavement exposed stone agent and preparation method and application thereof |
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| CN110846970A (en) * | 2019-11-20 | 2020-02-28 | 中国水利水电第四工程局有限公司 | Roller compacted concrete and turn-around road structure prepared from same |
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| CN112079653A (en) * | 2020-08-13 | 2020-12-15 | 福建西建新材料有限公司 | Concrete surface retarder and preparation method and application thereof |
| CN112745140B (en) * | 2021-01-13 | 2022-05-10 | 天津丰桥筑工住宅工业有限公司 | Paste coating type retarder and preparation method and application thereof |
| CN115448751A (en) * | 2022-09-14 | 2022-12-09 | 中国二十二冶集团有限公司 | Green environment-friendly concrete exposed aggregate water lotion and preparation method thereof |
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| FR2935140B1 (en) * | 2008-08-21 | 2012-06-01 | W R Grace Co Conin | ESTER-BASED SURFACE TAMPER RETARDANTS |
| CN103058571A (en) * | 2011-10-21 | 2013-04-24 | 林光德 | Preparation method of dextrin retarding superplasticizer |
| US9676668B2 (en) * | 2012-06-28 | 2017-06-13 | Redi-Mix, Llc | Dry mix for composite cement |
| CN102863177B (en) * | 2012-10-19 | 2014-04-09 | 南京瑞迪高新技术有限公司 | Special coagulation-delaying high-efficiency slushing agent for dam roller compacted concrete |
| CN103265249B (en) * | 2013-05-23 | 2016-08-10 | 中国铁道科学研究院金属及化学研究所 | A kind of Fast rush-repair mortar for ballastless track filling layer and its preparation method and application |
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Inventor after: Ma Xiaomin Inventor after: Suo Yinan Inventor after: Zhao Tianqi Inventor after: Zhao Hongjun Inventor after: Tian Ruoyu Inventor after: Ding Feng Inventor after: Li Baoshan Inventor after: Zhang Xiaofeng Inventor after: Sun Zhicuan Inventor after: Zhang Haichao Inventor after: Li Jinglai Inventor after: Ren Haode Inventor after: Huang Baoyin Inventor after: Liu Shumao Inventor before: Ma Xiaomin Inventor before: Li Zhelong Inventor before: An Jinyou Inventor before: Liu Shumao Inventor before: Suo Yinan Inventor before: Zhao Tianqi |
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