CN111791349A - Non-mechanical roughening process for treating continuous end of prestressed concrete beam slab by using super retarder - Google Patents
Non-mechanical roughening process for treating continuous end of prestressed concrete beam slab by using super retarder Download PDFInfo
- Publication number
- CN111791349A CN111791349A CN202010687728.1A CN202010687728A CN111791349A CN 111791349 A CN111791349 A CN 111791349A CN 202010687728 A CN202010687728 A CN 202010687728A CN 111791349 A CN111791349 A CN 111791349A
- Authority
- CN
- China
- Prior art keywords
- retarder
- prestressed concrete
- continuous end
- concrete beam
- roughening process
- 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.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B11/00—Apparatus or processes for treating or working the shaped or preshaped articles
- B28B11/08—Apparatus or processes for treating or working the shaped or preshaped articles for reshaping the surface, e.g. smoothing, roughening, corrugating, making screw-threads
- B28B11/0872—Non-mechanical reshaping of the surface, e.g. by burning, acids, radiation energy, air flow, etc.
-
- 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
-
- 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
- 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
- C04B40/02—Selection of the hardening environment
Abstract
The invention discloses a non-mechanical chiseling process for treating a continuous end of a prestressed concrete beam slab by using an ultra retarder, and relates to the field of concrete construction methods. Specifically, the method comprises the following steps: s1: cleaning a beam plate continuous end mold; s2, coating a retarder; s3: after the pouring of the beam concrete is finished, removing the die to finish the chiseling; the problem that quality control is difficult due to worker difference in the scabbling quality of the continuous concrete end in the common manual scabbling process is solved; the common manual scabbling process wastes time and labor, and has large noise and dust pollution, and the scabbling quality of the concrete continuous end has great difference due to different proficiency and responsibility of workers, and the quality control is difficult.
Description
Technical Field
The invention relates to the field of concrete construction methods, in particular to a preparation method of a super retarder and a non-mechanical roughening process of prestressed concrete based on the retarder.
Background
Traditional roughening is achieved by using a "chopper-axe" type tool or electric hammer to form rough exposed-bone indentations in the continuous end surface of the concrete structure that has been cast. The function is to firmly bond the two construction sections. In general, in an assembly structure and a prestressed structure, secondary structure forming and assembling are required, and members are required to be cast and connected for the second time to form a whole and bear force together.
The continuous ends of the prestressed concrete beam slabs are subjected to manual scabbling for many years, so that the time and labor are wasted, the noise and dust pollution are large, the potential safety hazard of construction is large, the scabbling quality of the continuous ends of the concrete is greatly different due to the proficiency and responsibility of workers, and the quality control is difficult.
Disclosure of Invention
The invention aims to provide a non-mechanical chiseling process for treating a continuous end of a prestressed concrete beam slab by using an ultra-retarder, and aims to solve the problems that in the common manual chiseling process, time and labor are wasted, noise and dust pollution are large, construction potential safety hazards are large, chiseling quality of the continuous end of the prestressed concrete is greatly different due to different proficiency and responsibility of workers, and quality control is difficult.
In order to solve the problems, the invention adopts the following technical means:
a non-mechanical roughening process for treating the continuous end of a prestressed concrete beam slab by using an ultra retarder comprises the following steps:
s1, after the template of the continuous end head of the prestressed concrete beam plate is checked and corrected, the inner side of the template is polished cleanly;
s2, uniformly brushing the special super retarder for artificial scabbling of the continuous end of the prestressed concrete on the surface of the formwork for 1-2 times by using a clean and tidy brush 1-2 hours before the formwork at the connecting end is installed, and brushing the next layer after the interval of the previous layer is 10-20 minutes;
s3, after the special super retarder is uniformly adsorbed on the surface of the template to form a film, assembling the template according to the design requirement;
s4, after the concrete pouring of the prestressed concrete beam slab is completed, the final setting strength of the concrete reaches more than 2.5MPa, the position strength of the cantilever reaches 75% of the designed strength, the formwork is removed, the side formwork is firstly removed, the end formwork is then removed, after the formwork is removed, the special super retarder concrete surface is brushed and non-sticky by pressing with fingers (namely after the concrete is initially set), and the concrete surface is cleaned by a row brush while flushing with clear water until the exposed stone depth reaches the designed requirement (namely the effect of removing skin and exposed bones is achieved).
And S5, maintaining the prestressed concrete beam plate according to the design specification.
Further, in step S4, the dew stone depth is 2-5 mm.
Furthermore, in step S2, the special super retarder includes the following materials in parts by weight: 10-30 parts of phosphate, 10-20 parts of hydroxyl surfactant, 1-3 parts of air entraining agent, 2-5 parts of stabilizer, other auxiliary agents and 60-70 parts of water.
Furthermore, the preparation process of the special super retarder comprises the following steps:
s1: adding water with the total water consumption of 70% into a stirring kettle;
s2: sequentially adding phosphate, hydroxyl surfactant, air entraining agent and stabilizer into the stirring kettle;
s3: after the mixture is stirred evenly, water with the residual total water consumption of 30 percent is added into the stirring kettle and stirred fully.
Further, the stirring speed of the stirring kettle is not less than 36 revolutions per minute.
Furthermore, in the step S2, in the process of adding the raw materials into the reaction kettle, the temperature in the reaction kettle is not less than 15 ℃, and the gap time of feeding is not less than 15 min.
The invention has the following beneficial effects:
in the in-process that uses, the retarder that this non-mechanical chisel hair technology relates to can not lead to the fact the influence to the mechanical properties of concrete material itself after using, and secondly, its slow setting effect is moderate, and the adjustability is strong, and in same concrete material curing time, the concrete can satisfy the design strength requirement to in subsequent operation, can not cause the poor problem that causes the post processing difficulty of concrete mixture shaping effect because of excessive slow setting.
Compared with the common manual chiseling method, after the retarder is used, the concrete mixture at the continuous end can delay hardening for 1-3 hours after being demoulded compared with the concrete mixture at the beam body, so that the overall physical and mechanical properties of the beam body cannot be influenced even if the non-mechanical chiseling construction time is not influenced. Therefore, the construction of the main beam body template is not influenced, the quality completion can be easily ensured in the non-mechanical hairbrush roughening process, and the controllability and operability of the roughening process are further improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The special super retarder for roughening the continuous end of the prestressed concrete beam slab comprises the following materials in percentage by mass: 10 parts of phosphate, 10 parts of hydroxyl surfactant, 1 part of air entraining agent, 2 parts of stabilizing agent and 60 parts of water;
the stabilizer is one of xanthan gum, guar gum and polyacrylamide.
Wherein the phosphate comprises one of sodium hexametaphosphate, sodium tripolyphosphate and sodium pyrophosphate.
The hydroxyl surfactant comprises one of triethylene glycol, Tween-80, span and polyethylene glycol octyl phenyl ether.
And, in the preparation process, the following method is adopted for preparation:
a preparation method of the super retarder comprises the following steps:
s1: adding water with the total water consumption of 70% into a stirring kettle;
s2: sequentially adding phosphate, hydroxyl surfactant, air entraining agent and stabilizer into the stirring kettle;
s3: after the mixture is stirred evenly, water with the residual total water consumption of 30 percent is added into the stirring kettle and stirred fully.
Wherein the stirring speed of the stirring kettle is not less than 36 revolutions per minute.
In step S2, the temperature in the reaction kettle is not less than 15 ℃, and the time of the gap between the raw materials is not less than 15 min.
The conventional phosphate corrosion inhibitor is acted, and the development of a cement paste coagulation process depends on the composition of cement minerals and the interaction between colloidal particles, and also depends on the existence state of electrolyte in the cement paste. If there is a relatively strong repulsion between the colloidal particles, the cement gel system will be stable, otherwise agglomeration will occur. The electrolyte can form an electric double layer on the surface of the cement mineral particles and prevent the particles from being combined with each other, when the electrolyte is excessive, the electric double layer is compressed, the attractive force between the particles is strong, and the cement gel starts to agglomerate. The phosphate inorganic retarder is electrolyte salt, can ionize out charged ions in aqueous solution to generate replacement and condensation, generates an insoluble film layer in the setting and hardening process of cement, influences the precipitation and nucleation of Ca (OH)2 and C-S-H and the formation process of C-A-S-H, further delays the setting and hardening of the cement and generates a retarding effect.
However, the common phosphate has an obvious retardation effect, and is generally used for avoiding the solidification and hardening of concrete in the process of transferring concrete slurry, so that the aim of only partially hardening the concrete and facilitating chiseling cannot be achieved.
Example 2
The roughening super-retarder for the continuous end of the prestressed concrete beam comprises the following materials in percentage by mass: 30 parts of phosphate, 20 parts of hydroxyl surfactant, 3 parts of air entraining agent, 5 parts of stabilizing agent and 70 parts of water;
the stabilizer is one of xanthan gum, guar gum and polyacrylamide.
Wherein the phosphate comprises one of sodium hexametaphosphate, sodium tripolyphosphate and sodium pyrophosphate.
The hydroxyl surfactant comprises one of triethylene glycol, Tween-80, span and polyethylene glycol octyl phenyl ether.
And, in the preparation process, the following method is adopted for preparation:
a preparation method of the super retarder comprises the following steps:
s1: adding water with the total water consumption of 70% into a stirring kettle;
s2: sequentially adding phosphate, hydroxyl surfactant, air entraining agent and stabilizer into the stirring kettle;
s3: after the mixture is stirred evenly, water with the residual total water consumption of 30 percent is added into the stirring kettle and stirred fully.
Wherein the stirring speed of the stirring kettle is not less than 36 revolutions per minute.
In step S2, the temperature in the reaction kettle is not less than 15 ℃, and the time of the gap between the raw materials is not less than 15 min.
The conventional phosphate corrosion inhibitor is acted, and the development of a cement paste coagulation process depends on the composition of cement minerals and the interaction between colloidal particles, and also depends on the existence state of electrolyte in the cement paste. If there is a relatively strong repulsion between the colloidal particles, the cement gel system will be stable, otherwise agglomeration will occur. The electrolyte can form an electric double layer on the surface of the cement mineral particles and prevent the particles from being combined with each other, when the electrolyte is excessive, the electric double layer is compressed, the attractive force between the particles is strong, and the cement gel starts to agglomerate. The phosphate inorganic retarder is electrolyte salt, can ionize out charged ions in aqueous solution to generate replacement and condensation, generates an insoluble film layer in the setting and hardening process of cement, influences the precipitation and nucleation of Ca (OH)2 and C-S-H and the formation process of C-A-S-H, further delays the setting and hardening of the cement and generates a retarding effect.
However, the common phosphate has an obvious retardation effect, and is generally used for avoiding the solidification and hardening of concrete in the process of transferring concrete slurry, so that the aim of only partially hardening the concrete and facilitating chiseling cannot be achieved.
Example 3
The roughening super-retarder for the continuous end of the prestressed concrete beam comprises the following materials in percentage by mass: 20 parts of phosphate, 12 parts of hydroxyl surfactant, 2 parts of air entraining agent, 4 parts of stabilizing agent and 65 parts of water;
the stabilizer is one of xanthan gum, guar gum and polyacrylamide.
Wherein the phosphate comprises one of sodium hexametaphosphate, sodium tripolyphosphate and sodium pyrophosphate.
The hydroxyl surfactant comprises one of triethylene glycol, Tween-80, span and polyethylene glycol octyl phenyl ether.
And, in the preparation process, the following method is adopted for preparation:
a preparation method of the super retarder comprises the following steps:
s1: adding water with the total water consumption of 70% into a stirring kettle;
s2: sequentially adding phosphate, hydroxyl surfactant, air entraining agent and stabilizer into the stirring kettle;
s3: after the mixture is stirred evenly, water with the residual total water consumption of 30 percent is added into the stirring kettle and stirred fully.
Wherein the stirring speed of the stirring kettle is not less than 36 revolutions per minute.
In step S2, the temperature in the reaction kettle is not less than 15 ℃, and the time of the gap between the raw materials is not less than 15 min.
The conventional phosphate corrosion inhibitor is acted, and the development of a cement paste coagulation process depends on the composition of cement minerals and the interaction between colloidal particles, and also depends on the existence state of electrolyte in the cement paste. If there is a relatively strong repulsion between the colloidal particles, the cement gel system will be stable, otherwise agglomeration will occur. The electrolyte can form an electric double layer on the surface of the cement mineral particles and prevent the particles from being combined with each other, when the electrolyte is excessive, the electric double layer is compressed, the attractive force between the particles is strong, and the cement gel starts to agglomerate. The phosphate inorganic retarder is electrolyte salt, can ionize out charged ions in aqueous solution to generate replacement and condensation, generates an insoluble film layer in the setting and hardening process of cement, influences the precipitation and nucleation of Ca (OH)2 and C-S-H and the formation process of C-A-S-H, further delays the setting and hardening of the cement and generates a retarding effect.
However, the common phosphate has an obvious retardation effect, and is generally used for avoiding the solidification and hardening of concrete in the process of transferring concrete slurry, so that the aim of only partially hardening the concrete and facilitating chiseling cannot be achieved.
Example 4
Meanwhile, the invention also relates to a non-mechanical roughening method for treating the continuous end of the prestressed concrete beam slab by using the ultra retarder, wherein the method specifically comprises the following steps:
s1, after the template of the continuous end head of the prestressed concrete beam plate is checked and corrected, the inner side of the template is polished cleanly;
s2, uniformly brushing the special ultra-retarder for the manual roughening of the concrete continuous end on the surface of the formwork for 1-2 times by using a clean and tidy brush 1-2 hours before the formwork at the connecting end is installed, and brushing the next layer after the interval of the previous layer is 10-20 minutes;
s3, after the special super retarder is uniformly adsorbed on the surface of the template to form a film, assembling the template according to the design requirement;
s4, after the concrete pouring of the prestressed concrete beam slab is completed, the final setting strength of the concrete reaches more than 2.5MPa, the position strength of the cantilever reaches 75% of the designed strength, the formwork is removed, the side formwork is firstly removed, the end formwork is then removed, after the formwork is removed, the special super retarder concrete surface is brushed and non-sticky by pressing with fingers (namely after the concrete is initially set), and the concrete surface is cleaned by a row brush while flushing with clear water until the exposed stone depth reaches the designed requirement (namely the effect of removing skin and exposed bones is achieved).
And S5, maintaining the prestressed concrete beam plate according to the design specification.
Further, in step S4, the dew stone depth is 2-5 mm.
Compared with a common manual chiseling method, after the retarder is used, the concrete material cannot be hardened after being demoulded, the strength of the material only reaches 75% of the design strength, so that the hardening degree of the material does not reach the full hardening degree, and workers can conveniently use the hairbrush to chisel the chiseling operation. Like this, because the hardness of material does not harden completely, at the in-process that utilizes the brush to chisel hair, the material can chisel hair easily, and then lets the workman need not use too big strength can accomplish the chisel hair, and further the controllability that has also improved the chisel hair process avoids the workman to widely chisel the in-process of hair, has reduced the controllability of workman to the chisel hair operation.
Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (6)
1. A non-mechanical chiseling process for treating the continuous end of a prestressed concrete beam slab by using an ultra retarder is characterized in that: the method comprises the following steps:
s1, after the template of the continuous end head of the prestressed concrete beam plate is checked and corrected, the inner side of the template is polished cleanly;
s2, uniformly brushing the special ultra-retarder for the manual roughening of the concrete continuous end on the surface of the formwork for 1-2 times by using a clean and tidy brush 1-2 hours before the formwork at the connecting end is installed, and brushing the next layer after the interval of the previous layer is 10-20 minutes;
s3, after the special super retarder is uniformly adsorbed on the surface of the template to form a film, assembling the template according to the design requirement;
s4, after the concrete pouring of the prestressed concrete beam plate is completed, the final setting strength of the concrete reaches more than 2.5MPa, the strength of the cantilever position reaches 75% of the designed strength, the formwork is removed, the side formwork is firstly removed, the end formwork is removed, after the formwork is removed, the surface of the concrete is not sticky by pressing and brushing the special ultra-retarder concrete surface by fingers, and then the surface of the concrete is cleaned by a row brush while being washed by clear water until the exposed stone depth reaches the design requirement;
and S5, maintaining the prestressed concrete beam plate according to the design specification.
2. The non-mechanical roughening process for treating the continuous end of the prestressed concrete beam slab with the ultra-retarder according to claim 1, wherein the non-mechanical roughening process comprises the following steps: in step S4, the depth of the exposed stone is 2-5 mm.
3. The non-mechanical roughening process for treating the continuous end of the prestressed concrete beam slab with the ultra-retarder according to claim 1, wherein the non-mechanical roughening process comprises the following steps: in step S2, the special super retarder comprises the following materials in parts by weight: 10-30 parts of phosphate, 10-20 parts of hydroxyl surfactant, 1-3 parts of air entraining agent, 2-5 parts of stabilizer, other auxiliary agents and 60-70 parts of water.
4. The non-mechanical roughening process for treating the continuous end of the prestressed concrete beam slab with the ultra-retarder according to claim 3, wherein the non-mechanical roughening process comprises the following steps: the preparation process of the special super retarder comprises the following steps:
s1: adding water with the total water consumption of 70% into a stirring kettle;
s2: sequentially adding phosphate, hydroxyl surfactant, air entraining agent and stabilizer into the stirring kettle;
s3: after the mixture is stirred evenly, water with the residual total water consumption of 30 percent is added into the stirring kettle and stirred fully.
5. The non-mechanical roughening process for treating the continuous end of the prestressed concrete beam slab with the ultra-retarder according to claim 4, wherein the non-mechanical roughening process comprises the following steps: the stirring speed of the stirring kettle is not less than 36 revolutions per minute.
6. The non-mechanical roughening process for treating the continuous end of the prestressed concrete beam slab with the ultra-retarder according to claim 4, wherein the non-mechanical roughening process comprises the following steps: and in the S2, in the process of adding the raw materials into the reaction kettle, the temperature in the reaction kettle is not less than 15 ℃, and the feeding gap time is not less than 15 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010687728.1A CN111791349A (en) | 2020-07-16 | 2020-07-16 | Non-mechanical roughening process for treating continuous end of prestressed concrete beam slab by using super retarder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010687728.1A CN111791349A (en) | 2020-07-16 | 2020-07-16 | Non-mechanical roughening process for treating continuous end of prestressed concrete beam slab by using super retarder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111791349A true CN111791349A (en) | 2020-10-20 |
Family
ID=72807429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010687728.1A Pending CN111791349A (en) | 2020-07-16 | 2020-07-16 | Non-mechanical roughening process for treating continuous end of prestressed concrete beam slab by using super retarder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111791349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863674A (en) * | 2021-10-18 | 2021-12-31 | 中铁十二局集团有限公司 | Concrete beam burr automatic generation structure and method thereof |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08188487A (en) * | 1995-01-09 | 1996-07-23 | Kohjin Co Ltd | Setting retardant paper for washing finish of concrete surface |
| JPH11320535A (en) * | 1998-05-21 | 1999-11-24 | Matsushita Sangyo Kk | Method for molding highly reflective concrete product |
| CN1871320A (en) * | 2003-10-20 | 2006-11-29 | 格雷斯公司 | Concrete surface retarders |
| CN101054854A (en) * | 2007-04-30 | 2007-10-17 | 中铁大桥局集团第二工程有限公司 | Construction method of quick roughening of concrete |
| CN102131750A (en) * | 2008-08-21 | 2011-07-20 | 格雷斯公司 | Ester-based concrete surface retarders |
| CN102584083A (en) * | 2012-02-13 | 2012-07-18 | 刘立文 | Method for preparing high belite cement retarder |
| CN202644821U (en) * | 2012-06-20 | 2013-01-02 | 中国十七冶集团有限公司 | Washing exposed aggregate color concrete externally-hung wallboard |
| CN103420687A (en) * | 2013-08-07 | 2013-12-04 | 中建商品混凝土成都有限公司 | Surface cleaning agent dedicated to exposed pervious concrete and preparation and application methods thereof |
| CN105421783A (en) * | 2015-12-18 | 2016-03-23 | 中交第二航务工程局有限公司 | wet joint face forming method |
| CN106277909A (en) * | 2016-08-19 | 2017-01-04 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN108049521A (en) * | 2017-12-20 | 2018-05-18 | 扬州大学 | A kind of assembled wall structure of the assembled light raw-soil and bionical soil RPC materials |
| CN108483966A (en) * | 2018-06-20 | 2018-09-04 | 湖州五石科技有限公司 | A kind of concrete retarder |
| CN109336452A (en) * | 2018-11-20 | 2019-02-15 | 福建建工建材科技开发有限公司 | A kind of surface retarders for concrete prefabricated element |
| CN110510913A (en) * | 2019-08-21 | 2019-11-29 | 安徽省高迪环保股份有限公司 | A kind of preparation method of the undisguised agent of prefabricated components concrete surface |
| CN110843082A (en) * | 2019-11-08 | 2020-02-28 | 北京科技大学 | Stress-free water washing roughening method |
-
2020
- 2020-07-16 CN CN202010687728.1A patent/CN111791349A/en active Pending
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08188487A (en) * | 1995-01-09 | 1996-07-23 | Kohjin Co Ltd | Setting retardant paper for washing finish of concrete surface |
| JPH11320535A (en) * | 1998-05-21 | 1999-11-24 | Matsushita Sangyo Kk | Method for molding highly reflective concrete product |
| CN1871320A (en) * | 2003-10-20 | 2006-11-29 | 格雷斯公司 | Concrete surface retarders |
| CN101054854A (en) * | 2007-04-30 | 2007-10-17 | 中铁大桥局集团第二工程有限公司 | Construction method of quick roughening of concrete |
| CN102131750A (en) * | 2008-08-21 | 2011-07-20 | 格雷斯公司 | Ester-based concrete surface retarders |
| CN102584083A (en) * | 2012-02-13 | 2012-07-18 | 刘立文 | Method for preparing high belite cement retarder |
| CN202644821U (en) * | 2012-06-20 | 2013-01-02 | 中国十七冶集团有限公司 | Washing exposed aggregate color concrete externally-hung wallboard |
| CN103420687A (en) * | 2013-08-07 | 2013-12-04 | 中建商品混凝土成都有限公司 | Surface cleaning agent dedicated to exposed pervious concrete and preparation and application methods thereof |
| CN105421783A (en) * | 2015-12-18 | 2016-03-23 | 中交第二航务工程局有限公司 | wet joint face forming method |
| CN106277909A (en) * | 2016-08-19 | 2017-01-04 | 桂林华越环保科技有限公司 | Concrete retarder |
| CN108049521A (en) * | 2017-12-20 | 2018-05-18 | 扬州大学 | A kind of assembled wall structure of the assembled light raw-soil and bionical soil RPC materials |
| CN108483966A (en) * | 2018-06-20 | 2018-09-04 | 湖州五石科技有限公司 | A kind of concrete retarder |
| CN109336452A (en) * | 2018-11-20 | 2019-02-15 | 福建建工建材科技开发有限公司 | A kind of surface retarders for concrete prefabricated element |
| CN110510913A (en) * | 2019-08-21 | 2019-11-29 | 安徽省高迪环保股份有限公司 | A kind of preparation method of the undisguised agent of prefabricated components concrete surface |
| CN110843082A (en) * | 2019-11-08 | 2020-02-28 | 北京科技大学 | Stress-free water washing roughening method |
Non-Patent Citations (3)
| Title |
|---|
| 李兵: "装配式混凝土构件用混凝土表面缓凝剂的研制", 《江西建材》 * |
| 段国荣 等: "《水泥基材料用表面活性剂》", 31 December 2015, 电子科技大学出版社 * |
| 马清浩: "《混凝土外加剂及建筑防水材料应用指南》", 30 June 1998, 中国建材工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113863674A (en) * | 2021-10-18 | 2021-12-31 | 中铁十二局集团有限公司 | Concrete beam burr automatic generation structure and method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9969102B2 (en) | Composition and method for obtaining exposed aggregates in surfaces of moulded concrete and other cementitious materials | |
| KR101455628B1 (en) | Fast hardening mortar composition for repairing and reinforcing concrete structures, and method of repairing and reinforcing concrete structures using the same | |
| CN102126840A (en) | Low-temperature concrete early strength agent | |
| CN111320450A (en) | Self-compacting material for repairing railway concrete sleeper and preparation method and application thereof | |
| CN111791349A (en) | Non-mechanical roughening process for treating continuous end of prestressed concrete beam slab by using super retarder | |
| CN104775530A (en) | Interface treatment method for horizontal construction seam of concrete | |
| CN102976787A (en) | Method for fabricating side rough surfaces of prefabricated part | |
| KR100639658B1 (en) | Aquatic hardening grout composites for repairing reinforced concrete structures submerged in the awter and repairing method thereof | |
| EP1352882B1 (en) | Concrete admixture, mortar admixture and blended cement | |
| CN101487295A (en) | Method for improving concrete horizontal construction joint bonding layer quality | |
| CN108863188A (en) | A kind of one-component interfacial agents and preparation method thereof | |
| CN109732771B (en) | Production process of prefabricated bridge plate | |
| CN207974469U (en) | A kind of European high-strength cement base artificial stone of assembled | |
| KR20220001217A (en) | High viscosity coating type concrete setting retarder composition | |
| CN111732359A (en) | Method for manufacturing set cement by using regenerated micro powder | |
| CN112195832A (en) | Method for controlling appearance quality of new Jersey guardrail constructed by slip form paver | |
| JP3797787B2 (en) | Slope spraying material and slope spraying method using the same | |
| JP3327209B2 (en) | Composition for surface finishing of concrete products | |
| JP2741334B2 (en) | Method of manufacturing decorative concrete building block | |
| JPH04369510A (en) | Concrete instantaneous mold-release block surface machining method and cement hydration reaction retarder for the same method | |
| CN220790580U (en) | Replaceable concrete retaining wall corner molding steel die | |
| JP2879258B2 (en) | Lightweight concrete compact and method for producing the same | |
| JPH11228251A (en) | Production of light-weight foamed concrete | |
| KR100517870B1 (en) | Mortar for composition of concrete wall | |
| JP2000016879A (en) | Production of alc(air-bubbled lightweight concrete) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201020 |
|
| RJ01 | Rejection of invention patent application after publication |