CN102432250B - High-compactness cement paste for vacuum grouting and manufacturing method thereof - Google Patents
High-compactness cement paste for vacuum grouting and manufacturing method thereof Download PDFInfo
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- CN102432250B CN102432250B CN 201110298308 CN201110298308A CN102432250B CN 102432250 B CN102432250 B CN 102432250B CN 201110298308 CN201110298308 CN 201110298308 CN 201110298308 A CN201110298308 A CN 201110298308A CN 102432250 B CN102432250 B CN 102432250B
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Abstract
The invention provides high-compactness cement paste for vacuum grouting and a manufacturing method thereof, and belongs to the technical field of pre-stress engineering. The manufacturing method comprises the following steps of 1, preparing 300 parts by weight of portland cement, 2.7 to 3.9 parts by weight of a polycarboxylic acid water reducer, 1.5 to 2.4 parts by weight of a polycarboxylic acid retarder, 93 to 99 parts by weight of water and 3 to 6 parts by weight of a paste thixotropic agent, 2, pouring water into a paste agitator tank, and simultaneously, adding the polycarboxylic acid water reducer and the polycarboxylic acid retarder into the paste agitator tank, and uniformly mixing, 3, adding cement with stirring and continuously stirring to obtain retarded paste, wherein the total time of feeding and stirring is in a range of 4 to 6 minutes, 4, putting the retarded paste into a paste storage tank with a stirrer and standing for 1 hour, and 5, starting the stirrer for stirring, adding the paste thixotropic agent into the retarded paste with stirring, and after addition of the paste thixotropic agent, sequentially stirring for 15 to 30 seconds to obtain thixotropic paste. The thixotropic paste can realize single-step grouting formation of a pipe having a high bending degree and thus work efficiency and construction quality are greatly improved.
Description
Technical field
The present invention relates to a kind of vacuum grouting cement slurry of highly dense solidity, this cement slurry is Nuclear power plants prestressed pipe grouting materials, is particularly suitable for the discrepancy in elevation and surpasses 1.2 meters bend pipe grouting, also is applicable to civil building engineering pre-stress system grouting materials.The invention still further relates to a kind of manufacture method of vacuum grouting cement slurry of highly dense solidity, belong to the prestress engineering technical field.
Background technology
Nuclear power plants pre-stress system steel bundle generally is divided into horizontal steel bundle, vertical steel bundle, and gamma steel bundle, these steel bundles all adopt the posttension daraf(reciprocal of farad) to carry out pre-stress construction.For preventing that extraneous hazardous medium from corroding prestress wire, guarantee the life of prestress engineering, need prestressed pore passage is irritated real with grout.
At first, require its stable performance for the Grouting Cement slurry, bleeding rate is low as far as possible.Because the bleeding of cement slurry can form the hole in the prestressed pore passage, may become the passage of extraneous hazardous medium invasion.And the performance of cement slurry is subjected to each side such as starting material are selected, production technique, influences such as construction environment.
Secondly, require the performance of slurry more can press close to construction condition and the density that guarantees prestress pipe.According to present construction technology and slurry performance, can guarantee the grouting quality of vertical pipe fully, but for crooked amplitude bigger level pipe and gamma steel bundle, all need take measures to guarantee the density in duct after the once grouting.At present, generally adopt the back-grouting method, namely once grouting is all poured into the slow setting slurry earlier, pours into the constructional method of the slurry that expands after a few hours again.This constructional method process is loaded down with trivial details, and the back-grouting link that increases is unfavorable for the prestress engineering control of construction quality.
Summary of the invention
Primary and foremost purpose of the present invention is, overcomes problems of the prior art, proposes a kind of vacuum grouting cement slurry of highly dense solidity, can realize that prestress pipe particularly finish by dome and bend pipe once grouting.
For solving above technical problem, the invention provides a kind of vacuum grouting cement slurry of highly dense solidity, material component and the weight content of this cement slurry are as follows, silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7～3.9 parts; Polycarboxylic acid series retardant: 1.5～2.4 parts; Water: 93～99 parts; Slurry thixotropic agent: 3～6 parts.
With respect to prior art, the present invention has obtained following beneficial effect: this cement slurry adds the slurry thixotropic agent on the basis of slow setting slurry, makes it become the thixotroping slurry; The thixotroping slurry is compared with the slow setting slurry, have following advantage: performances such as the time of coagulation of (1) slurry, intensity do not change, but the state of slurry becomes body of paste from flow state, when using at the scene, pipeline such as dome and horizontal pipe etc. that bending is bigger can once grouting be finished, need not to carry out back-grouting, improved working efficiency greatly, reduce the input of artificial and mechanical one-shift; (2) bleeding rate of thixotroping slurry is low, 3 hours bleeding rate＜0.5%, and this a small amount of bleeding can be absorbed by slurry self in 24 hours fully, volumetric shrinkage＜1.0%, improved the degree of compactness of duct grouting greatly, efficiently solve in the prestress engineering behind the duct grouting, form the mass defect problem in cavity because of grouting slurry bleeding in pipeline; (3) As time goes on the paste attitude denseness of slurry can increase gradually, when constructing at the scene, should finish grouting during for optimum regime in the slurry denseness, after this enters freezing period.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7 parts; Polycarboxylic acid series retardant: 1.5 parts; Water: 93 parts; Slurry thixotropic agent: 3 parts.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.3 parts; Polycarboxylic acid series retardant: 1.9 parts; Water: 96 parts; Slurry thixotropic agent: 4.5 parts.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.9 parts; Polycarboxylic acid series retardant: 2.4 parts; Water: 99 parts; Slurry thixotropic agent: 6 parts.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7 parts; Polycarboxylic acid series retardant: 2.4 parts; Water: 99 parts; Slurry thixotropic agent: 5 parts.
Another object of the present invention is, a kind of manufacture method of vacuum grouting cement slurry of highly dense solidity is provided, and makes the cement slurry form and can realize that prestress pipe particularly finish by dome and bend pipe once grouting.
For solving above technical problem, the invention provides a kind of manufacture method of vacuum grouting cement slurry of highly dense solidity, may further comprise the steps successively: (1) prepares raw material by following component and weight content: silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7～3.9 parts; Polycarboxylic acid series retardant: 1.5～2.4 parts; Water: 93～99 parts; Slurry thixotropic agent: 3～6 parts; (2) earlier water is injected the slurry stirred pot, add poly carboxylic acid series water reducer and polycarboxylic acid series retardant simultaneously and mix; (3) add silicate cement while stirring, cement blanking in 2 minutes finishes, and continue to stir the cement blanking back that finishes, and contains the cement blanking time to obtain the slow setting slurry in 4～6 minutes interior the stirring altogether; (4) place the slurry hold tank of belt stirrer to leave standstill 1 hour described slow setting slurry; (5) start agitator and stir, add the slurry thixotropic agent while stirring, continue to stir 15～30 seconds behind the adding slurry thixotropic agent, obtain the thixotroping slurry.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, prepare raw material by following component and weight content in the step (1): silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7 parts; Polycarboxylic acid series retardant: 1.5 parts; Water: 93 parts; Slurry thixotropic agent: 3 parts.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, prepare raw material by following component and weight content in the step (1): silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.3 parts; Polycarboxylic acid series retardant: 1.9 parts; Water: 96 parts; Slurry thixotropic agent: 4.5 parts.
As preferred version of the present invention, material component and the weight content of described cement slurry are as follows, prepare raw material by following component and weight content in the step (1): silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.9 parts; Polycarboxylic acid series retardant: 2.4 parts; Water: 99 parts; Slurry thixotropic agent: 6 parts.
As preferred version of the present invention, the degree of mobilization of slow setting slurry is 9～13 seconds described in the step (3), and the denseness of thixotroping slurry is 200～600cN.cm described in the step (5).
Embodiment
Embodiment one
(1) prepares raw material by following component and weight content: silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7 parts; Polycarboxylic acid series retardant: 1.5 parts; Water: 93 parts; Slurry thixotropic agent: 3 parts;
(2) earlier water is injected the slurry stirred pot, add poly carboxylic acid series water reducer and polycarboxylic acid series retardant simultaneously and mix;
(3) add silicate cement while stirring, cement blanking in 2 minutes finishes, and continue to stir the cement blanking back that finishes, and contains the cement blanking time to obtain the slow setting slurry in 4 minutes interior the stirring altogether, and under 25 ℃, the degree of mobilization of testing this slow setting slurry is 11 seconds;
(4) described slow setting slurry is placed the slurry hold tank with four agitators left standstill 1 hour;
(5) start agitator and stir, add the slurry thixotropic agent while stirring, continue to stir 15 seconds behind the adding slurry thixotropic agent, obtain the thixotroping slurry of paste.
Test data to this thixotroping slurry sees the following form.
| Unit | Numerical value | |
| Denseness (25 ℃) | cN·㎝ | 360 |
| Bleeding rate (3 hours) | % | 0.32 |
| Volumetric shrinkage (24 hours) | % | 0.8 |
| Time of coagulation (25 ℃) | h | 19.5 |
| Intensity (28 days) | Mpa | 90.1 |
| Capillary water absorption observed value (28 days) | g/cm3 | 0.83 |
Embodiment two
(1) prepares raw material by following component and weight content: silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.3 parts; Polycarboxylic acid series retardant: 1.9 parts; Water: 96 parts; Slurry thixotropic agent: 4.5 parts;
(2) earlier water is injected the slurry stirred pot, add poly carboxylic acid series water reducer and polycarboxylic acid series retardant simultaneously and mix;
(3) add silicate cement while stirring, cement blanking in 2 minutes finishes, and continue to stir the cement blanking back that finishes, and contains the cement blanking time to obtain the slow setting slurry in 5 minutes interior the stirring altogether, and under 25 ℃, the degree of mobilization of testing this slow setting slurry is 11.2 seconds;
(4) described slow setting slurry is placed the slurry hold tank with four agitators left standstill 1 hour;
(5) start agitator and stir, add the slurry thixotropic agent while stirring, continue to stir 20 seconds behind the adding slurry thixotropic agent, obtain the thixotroping slurry of paste.
Test data to this thixotroping slurry sees the following form.
| Unit | Numerical value | |
| Denseness (25 ℃) | cN·㎝ | 290 |
| Bleeding rate (3 hours) | % | 0.5 |
| Volumetric shrinkage (24 hours) | % | 0 |
| Time of coagulation (25 ℃) | h | 25 |
| Intensity (28 days) | Mpa | 92.0 |
| Capillary water absorption observed value (28 days) | g/cm3 | 0.38 |
Embodiment three
(1) prepares raw material by following component and weight content: silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.9 parts; Polycarboxylic acid series retardant: 2.4 parts; Water: 99 parts; Slurry thixotropic agent: 6 parts;
(2) earlier water is injected the slurry stirred pot, add poly carboxylic acid series water reducer and polycarboxylic acid series retardant simultaneously and mix;
(3) add silicate cement while stirring, cement blanking in 2 minutes finishes, and continue to stir the cement blanking back that finishes, and contains the cement blanking time to obtain the slow setting slurry in 6 minutes interior the stirring altogether, and under 25 ℃, the degree of mobilization of testing this slow setting slurry is 12 seconds;
(4) described slow setting slurry is placed the slurry hold tank with four agitators left standstill 1 hour;
(5) start agitator and stir, add the slurry thixotropic agent while stirring, continue to stir 30 seconds behind the adding slurry thixotropic agent, obtain the thixotroping slurry of paste.
Test data to this thixotroping slurry sees the following form.
| Unit | Numerical value | |
| Denseness (25 ℃) | cN·㎝ | 300 |
| Bleeding rate (3 hours) | % | 0.3 |
| Volumetric shrinkage (24 hours) | % | 1 |
| Time of coagulation (25 ℃) | h | 21.5 |
| Intensity (28 days) | Mpa | 91.2 |
| Capillary water absorption observed value (28 days) | g/cm3 | 0.87 |
Embodiment four
(1) prepares raw material by following component and weight content: silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7 parts; Polycarboxylic acid series retardant: 2.4 parts; Water: 99 parts; Slurry thixotropic agent: 5 parts;
(2) earlier water is injected the slurry stirred pot, add poly carboxylic acid series water reducer and polycarboxylic acid series retardant simultaneously and mix;
(3) add silicate cement while stirring, cement blanking in 2 minutes finishes, and continue to stir the cement blanking back that finishes, and contains the cement blanking time to obtain the slow setting slurry in 5 minutes interior the stirring altogether, and under 25 ℃, the degree of mobilization of testing this slow setting slurry is 11 seconds;
(4) described slow setting slurry is placed the slurry hold tank with four agitators left standstill 1 hour;
(5) start agitator and stir, add the slurry thixotropic agent while stirring, continue to stir 25 seconds behind the adding slurry thixotropic agent, obtain the thixotroping slurry of paste.
Test data to this thixotroping slurry sees the following form.
| Unit | Numerical value | |
| Denseness (25 ℃) | cN·㎝ | 290 |
| Bleeding rate (3 hours) | % | 0.4 |
| Volumetric shrinkage (24 hours) | % | 0.3 |
| Time of coagulation (25 ℃) | h | 24 |
| Intensity (28 days) | Mpa | 91.4 |
| Capillary water absorption observed value (28 days) | g/cm3 | 0.43 |
Among the above embodiment, the P II 42.5 that silicate cement adopts the cement mill, Guangzhou to produce, the ADVA161C that poly carboxylic acid series water reducer adopts Grace China Ltd. to produce, " FREYSSIFLOW-CEMETHIX F " type thixotropic agent that the ADVA165C that the polycarboxylic acid series retardant adopts Grace China Ltd. to produce, slurry thixotropic agent adopt French resipoly under freyssinet company to produce.
French Freyssinet International ﹠amp is adopted in the degree of mobilization test of slow setting slurry; The Ma Shi awl (Marsh cone) that Cie company produces; French Freyssinet International ﹠amp is adopted in the denseness test of thixotroping slurry; The CM10 type torque meter that Cie company produces.
In addition to the implementation, the present invention can also have other embodiments, and for example poly carboxylic acid series water reducer can also adopt the JM-PCA (I) that Jiangsu Subotexin Material Co., Ltd produces.ADVA165M4, ADVA165M5 or ADVA165M6 that the polycarboxylic acid series retardant can also adopt Grace China Ltd. to produce, the JM-PCA (II) that perhaps adopts Jiangsu Subotexin Material Co., Ltd to produce, JM-PCA (I) or JM-PCA (V) etc.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all fall into the protection domain of requirement of the present invention.
Claims (4)
1. the manufacture method of the vacuum grouting cement slurry of a highly dense solidity is characterized in that: may further comprise the steps successively: (1) prepares raw material by following component and weight content: silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7～3.9 parts; Polycarboxylic acid series retardant: 1.5～2.4 parts; Water: 93～99 parts; Slurry thixotropic agent: 3～6 parts; (2) earlier water is injected the slurry stirred pot, add poly carboxylic acid series water reducer and polycarboxylic acid series retardant simultaneously and mix; (3) add silicate cement while stirring, cement blanking in 2 minutes finishes, and continue to stir the cement blanking back that finishes, and contains the cement blanking time to obtain the slow setting slurry in 4～6 minutes interior the stirring altogether; (4) place the slurry hold tank of belt stirrer to leave standstill 1 hour described slow setting slurry; (5) start agitator and stir, add the slurry thixotropic agent while stirring, continue to stir 15～30 seconds behind the adding slurry thixotropic agent, obtain the thixotroping slurry; The degree of mobilization of slow setting slurry is 9～13 seconds described in the step (3), and the denseness of thixotroping slurry is 200～600cN.cm described in the step (5).
2. the manufacture method of the vacuum grouting cement slurry of highly dense solidity according to claim 1 is characterized in that: prepare raw material by following component and weight content in the step (1): silicate cement: 300 parts; Poly carboxylic acid series water reducer: 2.7 parts; Polycarboxylic acid series retardant: 1.5 parts; Water: 93 parts; Slurry thixotropic agent: 3 parts.
3. the manufacture method of the vacuum grouting cement slurry of highly dense solidity according to claim 1 is characterized in that: prepare raw material by following component and weight content in the step (1): silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.3 parts; Polycarboxylic acid series retardant: 1.9 parts; Water: 96 parts; Slurry thixotropic agent: 4.5 parts.
4. the manufacture method of the vacuum grouting cement slurry of highly dense solidity according to claim 1 is characterized in that: prepare raw material by following component and weight content in the step (1): silicate cement: 300 parts; Poly carboxylic acid series water reducer: 3.9 parts; Polycarboxylic acid series retardant: 2.4 parts; Water: 99 parts; Slurry thixotropic agent: 6 parts.
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| CN103321420B (en) * | 2013-06-26 | 2015-05-13 | 中国核工业华兴建设有限公司 | Vacuum-assisted grouting device and method for gamma-type prestressed pipes |
| CN103553473B (en) * | 2013-11-04 | 2015-09-09 | 中国建筑第二工程局有限公司 | Prestress pipe grouting retardation setting type grout and preparation method thereof |
| CN106495575A (en) * | 2016-09-12 | 2017-03-15 | 广西大学 | A kind of cement mortar and preparation method thereof |
| CN107759168B (en) * | 2017-10-19 | 2020-11-10 | 中国核工业华兴建设有限公司 | Novel prestressed cement stable slurry and manufacturing method thereof |
| CN112608095A (en) * | 2020-12-02 | 2021-04-06 | 中广核工程有限公司 | Expansion slurry for prestressed pipeline grouting and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602589A (en) * | 2009-06-30 | 2009-12-16 | 中国地质大学（武汉） | Post-tensioned prestressing pipeline vacuum grouting or mud jacking preformed material and preparation method thereof |
| CN102030493A (en) * | 2010-11-23 | 2011-04-27 | 北京住总集团有限责任公司 | Material for improving mortar coagulating time and operability and use method thereof |
| CN102190464A (en) * | 2010-03-12 | 2011-09-21 | 古金盛 | Inorganic lightweight grouting material, and manufacture method thereof |
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| CN1865185A (en) * | 2005-05-21 | 2006-11-22 | 新疆石油管理局钻井工艺研究院 | High density concrete slurry |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101602589A (en) * | 2009-06-30 | 2009-12-16 | 中国地质大学（武汉） | Post-tensioned prestressing pipeline vacuum grouting or mud jacking preformed material and preparation method thereof |
| CN102190464A (en) * | 2010-03-12 | 2011-09-21 | 古金盛 | Inorganic lightweight grouting material, and manufacture method thereof |
| CN102030493A (en) * | 2010-11-23 | 2011-04-27 | 北京住总集团有限责任公司 | Material for improving mortar coagulating time and operability and use method thereof |
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Effective date of registration: 20211122 Address after: 210019 Yunlong mountain road, Jianye District, Nanjing, Jiangsu 79 Patentee after: China Nuclear Industry Huaxing Construction Co.,Ltd. Patentee after: Jiangsu Zhonghe Huaxing Engineering Testing Co., Ltd Address before: 210019 Yunlong mountain road, Jianye District, Nanjing, Jiangsu 79 Patentee before: China Nuclear Industry Huaxing Construction Co.,Ltd. |