CN101545320B - Method for compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool - Google Patents
Method for compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool Download PDFInfo
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- CN101545320B CN101545320B CN2008100350809A CN200810035080A CN101545320B CN 101545320 B CN101545320 B CN 101545320B CN 2008100350809 A CN2008100350809 A CN 2008100350809A CN 200810035080 A CN200810035080 A CN 200810035080A CN 101545320 B CN101545320 B CN 101545320B
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- mortar
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Abstract
The invention discloses a method for compensation and anti-permeation of temperature difference cracks of a ground concrete high-temperature pool. The method comprises the following steps of: reliably sealing the place having the crack permeation firstly, and then (1) preparing self-healing mortar and using the self-healing mortar to plaster the surface of the pool; and (2) preparing temperature difference compensation mortar and using the temperature difference compensation mortar to plaster the surface of the pool. The self-healing mortar comprises the following compositions by weight portion: 100 portions of ordinary Portland cement, 200 to 400 portions of medium coarse sand, 6 to 10 portions of D-type adjusting agent, 0.1 to 1 portion of water reducing agent, 1 to 3 portions of silicon ash and 30 to 40 portions of water. The temperature difference compensation mortar comprises the following compositions by weight portion: 100 portions of ordinary Portland cement, 200 to 400 portions of medium coarse sand, 2 to 4 portions of F type adjusting agent, 0.1 to 0.2 portion of air-entraining agent and 30 to 50 portions of water. The method reduces the pool wall temperature stress, effectively controls temperature difference cracks and reduces the maintenance cost.
Description
Technical field
The present invention relates to a kind of external governance method that do not stop production of ground concrete structure temperature difference crack seepage of stored hot water.
Background technology
Domestic and international existing industry water recycle is quite general, and it is in the concrete structure that the big volume recirculated water of the overwhelming majority stores the pond structure, and the position of the above certain altitude on ground is built in the pond usually.Under the common process condition, generally about 70 ℃, pond surfaces externally and internally temperature differed up to more than 50 ℃ the average water temperature of industrial cooling circulating water when temperature was low, and the pond external surface produces number of fine thermal stresses seam, and continuous infiltration state occurs.Water can cause the calcium ion in the concrete material to separate out through concrete structure layer seepage, reduces structural strength, and the durability and the safety of concrete basin worked the mischief.This pond is owing to receive production condition of continuity restriction and can not stop using usually and carry out inner impervious processing, and traditional measure of externally crack being repaired can not be controlled thermal stresses, and the crack can occur repeatedly and can not heal, and causes the treating seepage failure.
In present public technology; " Liaoning Project Technology University's journal " 2007; 26 (2) natural science edition 228-231 pages or leaves " analysis in reinforced concrete water pond crack and processing " have been analyzed the reason that certain round pool structure temperature difference crack produces, and propose externally to set up the steel loop hoop and structure are reinforced the scheme of repairing the crack with the constraint thermal stresses and with slip casting." structural engineer " 2002 (2) 59-64 pages or leaves " steel concrete circular pool FRAC and processing " this piece article and last piece of writing content are approximate, and the solution that both propose is structural strengthening and Deformation control and constraint.
In present disclosed other professional treatises and correlation engineering job specfication, to general leak stopping method, the grouting for water plugging method of wiping one's face that adopt of improvement of crack, concrete structure pond seepage, the selection of material is waterproofing mortar, polymer chemistry slip casting etc.Like iron chloride waterproofing mortar match ratio be: cement: sand: iron chloride waterproof agent=1: 2: 0.03, waterproofing mortar class be through the construction of wiping one's face, and its scope of application is " Stability Analysis of Structures, can Yin Wendu, humidity variation etc. produces the engineering in harmful crack ".The polymer chemistry injecting paste material has polyurethane kind, epoxy resin, acryloyl Ammonia etc., is host like polyurethane slurries match ratio: surfactant: emulsifier: catalyzer=100: 1: 1: (0.1～0.5); Epoxy chaff ketone slurries match ratio is main liquid: thinner: setting accelerator: curing compound=1000ml: (68～58) ml: (0～30) g: (288～308) ml; The acrylamide slurry material consists of (%): host 5～20, crosslinking agent 0.3～0.7, accelerator 0.5～2, powerful accelerator 0.02～0.1, retarding agent 0.02～0.1, initator 0.5～2.The construction of macromolecule grouting and water-proof is through the slip casting facility slurries to be injected the slit, and its applied characteristic is " have the property annotated preferably, be applicable to the mortar depositing construction in micro-pore and crack, be not suitable for the environment that alternation of wetting and drying changes ".These traditional handicraft methods are directed against is crack and the seepage under existing, the stable state.When concrete basin water temperature on the ground is high, thermal stresses shows under the tangible situation, temperature difference crack can occur repeatedly.The pool wall of pool temperature difference that has its source in of this problem does not obtain handling and improving, and thermal stresses can not be controlled effectively.See that from present engineering actual effect the back is repaired in the crack leakage problems can occur again in a week, and can't heal voluntarily in the crack.Therefore, traditional improvement method does not provide effectively, controls reliably and technical solution for the temperature difference crack that produces repeatedly because of problems such as technology, uses.
Summary of the invention
The objective of the invention is provides a kind of external governance method that need not stop production for the concrete basin of storage hot water because of the temperature difference produces the crack leakage problems.
The present invention is achieved in that a kind of compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool method; At first reliable shutoff is carried out in existing crack, its method to clearing up in the crack, is opened technology groove for earlier afterwards along the crack; Seepage discharge hour directly employing sealing agent shutoff; At shutoff external coating polymer cement, flow also will carry out polyurethane or epoxy resin slip casting shutoff when big outside aforementioned operation again, and operation is after accomplishing the reliable shutoff in crack:
(1) preparation self-healing property mortar and use the self-healing property mortar to the pond processing of wiping one's face;
(2) preparation temperature difference compensation mortar and use the temperature difference compensation mortar to the pond processing of wiping one's face.
Said self-healing property mortar is made up of Portland cement, medium coarse sand, D type adjustment agent, lignosulfonates water reducing agent, silicon ash and water, and the weight ratio of each component is:
Portland cement 100
Medium coarse sand 200～400
D type adjustment agent 6～10
Lignosulfonates water reducing agent 0.1～1
Silicon ash 1～3
Water 30～40.
Wherein D type adjustment agent is the commercially available prod, and main component is: ultra-fine wollastonite powder, CAS micro-expanding agent, EVA rubber powder, sodium sulphate early strength admixture.
Said temperature difference compensation mortar is made up of Portland cement, medium coarse sand, F type adjustment agent, aliphatic alcohol polyethenoxy sodium sulfonate air entraining agent and water, and the weight ratio of each component is:
Portland cement 100
Medium coarse sand 200～400
F type adjustment agent 2～4
Aliphatic alcohol polyethenoxy sodium sulfonate air entraining agent 0.1～0.2
Water 30～50.
Wherein F type adjustment agent is the commercially available prod, and main component is: ultra-fine wollastonite powder, organosilicon emulsion, alunite, glue join couplant.
Said use self-healing property mortar is to the pond processing of wiping one's face; To clear up the surface, pond before handling wiping one's face, carry out interface junction slurry or concrete interface agent bottoming, when wiping one's face processing between mortar thickness 8mm～20mm; Wiping one's face, temperature is not less than 5 ℃ when handling, and curing time is no less than 72 hours.
Said self-healing property mortar will be joined existing usefulness at present, after preparing, uses within an hour.
Said use temperature difference compensation mortar is to the pond processing of wiping one's face; To clear up the surface, pond before handling wiping one's face, carry out interface junction slurry or concrete interface agent bottoming, when wiping one's face processing between mortar thickness 8mm～20mm; Wiping one's face, temperature is not less than 5 ℃ when handling, and curing time is no less than 48 hours.
Said temperature difference compensation mortar will be joined existing usefulness at present, after preparing, uses within an hour.
The present invention is directed to the seepage cracking of temperature difference cracks of ground concrete high-temperature pool, prepare and whitewash two kinds of dedicated mortars structural outer surface is handled, do not solving the temperature difference crack problem under the end-of-life state.The present invention at first adopts a kind of mortar that possesses self-healing function that the crack is repaired, in case micro-cracks occurs, under the aqueous medium mobilization, the self-healing property mortar can generate new hydrate with gap closing at crack periphery, reaches the purpose of healing voluntarily; Adopt a kind of mortar to whitewash then in structural outer surface with temperature difference compensation function; Improve the pool construction surface resistance of heat transfer, the diffusion velocity of slowing down the pond hull-skin temperature reduces pool wall internal and external temperature gradient; Thereby reduce the thermal stresses in concrete high temperature pond, to reduce the generation of temperature difference crack.Through being used in combination of these two kinds of methods, realize concrete high temperature pond end-of-life state stable, reliable waterproofing and anti-leakage down not.The present invention has adopted temperature difference crack compensation and anti-permeation method, when the part, pond causes under the infiltration situation because of thermal stresses produces the crack, when the diel seepage discharge less than 10 cubic decimeters of situation under, can heal voluntarily through week age.
Because the present invention prepares the fundamental characteristics that two kinds of special function mortars that use all have mortar, can not directly construction and maintenance under open fire or circulating water state.Therefore, before these two kinds of material constructions, must carry out reliable shutoff to existing crack seepage place earlier.Method commonly used at present is generally: directly adopt the sealing agent shutoff during low discharge, can adopt polyurethane or epoxy resin slip casting shutoff at flow than large part, but under the still unsettled situation of thermal stresses, leak stopping is held time shorter.Therefore, do not receive the influence of percolating water for guaranteeing above-mentioned two kinds of materials in construction period, shutoff requires reliable, need clear up the crack, opens technology groove along the crack, and groove width is at 5mm～40mm.The shutoff surface should be not less than 1mm by the brushing polymer cement, guarantees when follow-up construction, not occur infiltration.
After accomplishing shutoff, re-use self-healing property mortar and temperature difference compensation mortar to the pond processing of wiping one's face.In order to improve the globality of repairing the position, whole rendering layer must once be accomplished when using self-healing property mortar and temperature difference compensation mortar that processing is wiped one's face in the pond, and in the time of must connecing raft, raft mouth lap length is no less than 100mm.The key technical indexes of self-healing property mortar: compressive strength>=50Mpa, rupture strength>=3.5Mpa, 48h water demand ratio≤50%, 28d shrinkage ratio≤135%, pressure permeation self-healing property (＜10g/h.cm
2)≤7d.The key technical indexes of temperature difference compensation mortar: compressive strength>=50Mpa, rupture strength>=3.5Mpa, 48h water demand ratio≤35%, 28d shrinkage ratio≤135%, condensation water quantity is than＜20%.
Use self-healing property mortar and temperature difference compensation mortar to be wiped one's face to handle in the pond among the present invention and also can be used for before the pond seepage does not take place preventative processing being carried out in the pond, can effectively prevent pond occurrence temperature stress seepage.
The present invention has following beneficial effect: adopted temperature difference crack compensation and anti-permeation method; Improved concrete high temperature pond anti-permeation cracking-resistant performance; Reduce the pool wall thermal stresses, effectively controlled the appearance of temperature difference crack, reduced maintenance cost; Improve the surface physical properties of concrete structure in natural environment, improved reliability, economy, the treating seepage convenience of treating seepage.
Description of drawings
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is described further.
Fig. 1 is a pond of the present invention temperature difference crack compensation and anti-permeation method sketch map;
Among the figure: 1 high temperature water, 2 concrete structure layers, 3 drainings (slag) mouth, 4 crack plugging materials, 5 polymer cement encapsulants, 6 self-healing property screeds, 7 temperature difference compensation screeds.
The specific embodiment
Referring to Fig. 1.In embodiment 1,2,3, the proportioning of self-healing property mortar and temperature difference compensation mortar is shown in table 1, table 2, and technical data is shown in table 3, table 4.
Table 1 self-healing property mortar proportioning (by weight)
| Component | Portland cement | Medium coarse sand | D type adjustment agent | Water reducing agent | The silicon ash | Water |
| Embodiment 1 | 100 | 300 | 8 | 1 | 1.5 | 35 |
| |
100 | 200 | 6.2 | 0.6 | 1 | 30 |
| |
100 | 400 | 9.8 | 0.2 | 2.8 | 38 |
Table 2 temperature difference compensation mortar proportioning (by weight)
| Component | Portland cement | Medium coarse sand | F type adjustment agent | Air entraining agent | Water |
| Embodiment 1 | 100 | 300 | ?3 | 0.15 | 40 |
| |
100 | 200 | ?2.1 | 0.1 | 30 |
| |
100 | 400 | ?4 | 0.2 | 50 |
Self-healing property mortar technical data among table 3 embodiment
| Index | Compressive strength (Mpa) | Rupture strength (Mpa) | 48h water demand ratio (%) | 28d shrinkage ratio (%) | Pressure permeation self-healing property (d) |
| Embodiment 1 | 60.83 | 4.34 | 31.44 | 89.3 | ＜7 |
| |
69.83 | 5.17 | 31.4 | 102 | ＜7 |
| |
51 | 3.5 | 30.03 | 100.34 | ＜7 |
Temperature difference compensation mortar technical data among table 4 embodiment
| Index | Compressive strength (Mpa) | Rupture strength (Mpa) | 48h water demand ratio (%) | 28d shrinkage ratio (%) | Condensation water quantity is than (%) |
| Embodiment 1 | 64.5 | 5.5 | 33.01 | 66.9 | 17 |
| |
63.8 | 5.3 | 32.05 | 75.5 | 16.8 |
| |
55 | 4.97 | 32.47 | 73.56 | 19.3 |
Embodiment 1: the calcium compound of cleaning concrete structure seepage crack periphery; Crack for the low discharge infiltration; Adopting the stone material cutter to cut out the degree of depth along the crack is that 8mm, width are the technology groove of 5mm, with agent to rapidly block up leakage shutoff crack, disposes gel content then and be about 15% polymer cement; The glue kind is selected the acrylate emulsion for use, the fracture faces of brushing after repairing; For the crack of big flow seepage, behind the calcium compound of cleaning concrete structure seepage crack periphery, adopting the stone material cutter to cut out width along the crack is that 10mm, the degree of depth are the technology groove of 10mm; Pre-buried Grouting Pipe drainage with agent to rapidly block up leakage shutoff crack, is disposed gel content and is 15% polymer cement then; The glue kind is selected the acrylate emulsion for use; The fracture faces of brushing after repairing adopts the polyurethane injection slurry to carry out the slip casting reparation then, pulls out Grouting Pipe after reaching intensity.
Accomplish leak stopping, and behind the cleaning concrete structure external surface, adopting the concrete interface agent bottoming to handle thickness 0.5mm.Prepare the self-healing property mortar then, process mortar, evenly stir, prolong 3 minutes than ordinary mortar mixing time according to the proportioning of table 1 embodiment 1.Whitewash by thickness 10mm then, once accomplish.In three days, carry out wet curing, keep hydration reaction time and humidity.
After accomplishing the impervious processing of self-healing property mortar, remove the floating ash of body structure surface, adopt the concrete interface agent bottoming to handle thickness 0.5mm.Preparation temperature difference compensation mortar: the proportioning by table 2 embodiment 1 is processed mortar, evenly stirs, and should prolong 5 minutes than ordinary mortar mixing time.Whitewash by thickness 10mm then, once accomplish.In two days, carry out wet curing, keep hydration reaction time and humidity.
Embodiment 2: the leak stopping process after accomplishing leak stopping, behind the cleaning concrete structure external surface, adopts the concrete interface agent bottoming to handle thickness 0.5mm with embodiment 1.Prepare the self-healing property mortar then, process mortar, evenly stir, prolong 3 minutes than ordinary mortar mixing time according to the proportioning of table 1 embodiment 2.Whitewash by thickness 15mm then, once accomplish.In three days, carry out wet curing, keep hydration reaction time and humidity.
After accomplishing the impervious processing of self-healing property mortar, remove the floating ash of body structure surface, adopt the concrete interface agent bottoming to handle thickness 0.5mm.Preparation temperature difference compensation mortar: the proportioning by table 2 embodiment 2 is processed mortar, evenly stirs, and should prolong 5 minutes than ordinary mortar mixing time.Whitewash by thickness 15mm then, once accomplish.In two days, carry out wet curing, keep hydration reaction time and humidity.
Embodiment 3: the leak stopping process after accomplishing leak stopping, behind the cleaning concrete structure external surface, adopts the concrete interface agent bottoming to handle thickness 0.5mm with embodiment 1.Prepare the self-healing property mortar then, process mortar, evenly stir, prolong 3 minutes than ordinary mortar mixing time by the proportioning of table 2 embodiment 3.Whitewash by thickness 20mm then, once accomplish.In three days, carry out wet curing, keep hydration reaction time and humidity.
After accomplishing the impervious processing of self-healing property mortar, remove the floating ash of body structure surface, adopt the concrete interface agent bottoming to handle thickness 0.5mm.Preparation temperature difference compensation mortar: the proportioning by table 2 embodiment 3 is processed mortar, evenly stirs, and should prolong 5 minutes than ordinary mortar mixing time.Whitewash by thickness 20mm then, once accomplish.In two days, carry out wet curing, keep hydration reaction time and humidity.
Prove that through above-mentioned three kinds of proportioning results of implementation after the infiltration point that thermal stresses causes occurred, healing time seepage no longer occurred less than 7 days voluntarily, the crack of chapping does not appear in the ground concrete high temperature pond after the reparation.
Claims (5)
1. a compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool method is at first carried out reliable shutoff to existing crack, and its method is earlier to clearing up in the crack; Open technology groove along the crack afterwards; Seepage discharge hour directly employing sealing agent shutoff, again at shutoff external coating polymer cement, flow also will carry out polyurethane or epoxy resin slip casting shutoff outside aforementioned operation when big; It is characterized in that operation is after accomplishing the reliable shutoff in crack:
(1) preparation self-healing property mortar and use the self-healing property mortar to the pond processing of wiping one's face;
(2) preparation temperature difference compensation mortar and use the temperature difference compensation mortar to the pond processing of wiping one's face.
2. compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool method as claimed in claim 1; It is characterized in that said use self-healing property mortar is to the pond processing of wiping one's face, will clear up the surface, pond before handling wiping one's face; Carry out interface junction slurry or concrete interface agent bottoming; Between mortar thickness 8mm～20mm, temperature is not less than 5 ℃ when wiping one's face processing when wiping one's face processing, and curing time is no less than 72 hours.
3. compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool method as claimed in claim 2 is characterized in that, said self-healing property mortar will be joined existing usefulness at present, after preparing, uses within an hour.
4. compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool method as claimed in claim 1; It is characterized in that said use temperature difference compensation mortar is to the pond processing of wiping one's face, will clear up the surface, pond before handling wiping one's face; Carry out interface junction slurry or concrete interface agent bottoming; Between mortar thickness 8mm～20mm, temperature is not less than 5 ℃ when wiping one's face processing when wiping one's face processing, and curing time is no less than 48 hours.
5. compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool method as claimed in claim 4 is characterized in that, said temperature difference compensation mortar will be joined existing usefulness at present, after preparing, uses within an hour.
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| CN2008100350809A CN101545320B (en) | 2008-03-25 | 2008-03-25 | Method for compensation and anti-permeation of temperature difference cracks of ground concrete high-temperature pool |
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| CN101545320B true CN101545320B (en) | 2012-01-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101864778B (en) * | 2010-06-30 | 2012-11-07 | 广东省基础工程公司 | Method for leaking stoppage of external wall of underground structure |
| CN102505663B (en) * | 2011-10-14 | 2014-10-22 | 中煤建筑安装工程公司第七十三工程处 | Method for repairing seepage of concentration tank and water tank |
| CN103964796B (en) * | 2013-01-24 | 2016-08-10 | 北京交通大学 | A kind of shield tunnel simultaneous grouting slurry being applicable to water-rich sand layer |
| CN106284693B (en) * | 2016-08-25 | 2019-07-19 | 刘国良 | A kind of construction method of powdery sealing permeability-reducing admixture |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1169404A (en) * | 1996-06-24 | 1998-01-07 | 张显军 | Plasticizing lead gas for building mortar and concrete, lead gas water-reducer and preparation technology thereof |
| JP2005282212A (en) * | 2004-03-30 | 2005-10-13 | Kumagai Gumi Co Ltd | Construction method of cast-in-place concrete pile |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1169404A (en) * | 1996-06-24 | 1998-01-07 | 张显军 | Plasticizing lead gas for building mortar and concrete, lead gas water-reducer and preparation technology thereof |
| JP2005282212A (en) * | 2004-03-30 | 2005-10-13 | Kumagai Gumi Co Ltd | Construction method of cast-in-place concrete pile |
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