CN105133853A - Concrete crack repairing construction technology suitable for high and cold regions - Google Patents
Concrete crack repairing construction technology suitable for high and cold regions Download PDFInfo
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- CN105133853A CN105133853A CN201510573053.7A CN201510573053A CN105133853A CN 105133853 A CN105133853 A CN 105133853A CN 201510573053 A CN201510573053 A CN 201510573053A CN 105133853 A CN105133853 A CN 105133853A
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Abstract
The invention provides a concrete crack repairing construction technology suitable for high and cold regions. Concrete crack repairing adhesive is heated through a water bath, and then an existing common region concrete crack repairing method is used for repairing the crack on a concrete component; then, thermal-insulation materials are used for wrapping the repaired concrete component in a full-closed mode; next, the thermal-insulation materials are dismantled, and then concrete crack repairing of the high and cold regions is completed. According to the construction technology, the repairing adhesive is heated through the water bath, mixing and stirring of the repairing materials are facilitated, the flowability of the materials is improved, construction is convenient, construction efficiency is improved, the materials are prevented from being rapidly solidified at low temperature, normal solidification is achieved, and the materials can complete solidification and strength improvement well in a highland low-temperature environment. The thermal-insulation measure is adopted, and needed temperature conditions are provided for the repairing materials to guarantee the repairing effect; needed equipment and tools are simple and easy to purchase, the price is low, and implementation is easy.
Description
Technical field
The invention belongs to repairing technology of concrete crack field, relate to a kind of construction technology for extremely frigid zones repairing concrete crack, the repairing of the concrete structure member crevices in Qinghai-xizang Plateau Region reinforced concrete structure building can be widely used in, also can be applicable to that other are high and cold, the repairing concrete crack engineering of severe cold area.
Background technology
Qinghai-Tibet Platean belongs to High aititude, puna district, its basic characteristics are: temperature is low, rarefaction of air, dry and rainless, severe cold region, atmosphere transparency are high, solar radiation is abnormal strong, Qinghai-Tibet Surface Average Air Temperature is low 10 DEG C compared with same latitude area ~ and 14 DEG C.In Qinghai-Tibet most area, average temperature of the whole year is below 0 DEG C, and the average temperature of the whole year of Permafrost Area is then below-2 DEG C.Air on plateau is very dry, average of the whole year absolute humidity only has 1/3rd of same latitude Plain, annual mean relative humidity is 50% ~ 60%, these factors exacerbate concrete plastic shrinkage, self-constriction, dry contraction, cold events etc. greatly, and concrete contraction can cause component inside to produce stress, the continuous increase of stress easily makes concrete component produce crack.For Infiltration provides passage after crack produces, the moisture infiltrated is meeting glaciation under subzero temperature condition, volume expansion 9%, and makes concrete component produce swelling stress, there is crack, easily have adverse effect to the normal use, supporting capacity etc. of concrete structure.The problem that concrete causes intensity and structural safety to decline because of impaired, aging etc. is much more serious than general area, needs to carry out crack repairing in time.
The repairing technology of concrete crack be applied at present under altitude environment is the repair technology in general area substantially, there is no the special repairing technology of concrete crack for highlands, by the restriction of plateau rugged environment condition, its repair efficiency is subject to certain impact.According to a large amount of field investigation, carry out the concrete component of crack repairing, there is the phenomenons such as the coming off of patching material, scaling, cracking, its engineering effort reduces even entirely ineffective.
Summary of the invention
The object of this invention is to provide a kind of concrete crack repair process being applicable to extremely frigid zones, the repair efficiency of distress in concrete under the ambient conditions that extremely frigid zones is special can be ensured.
For achieving the above object, the technical solution adopted in the present invention is: a kind of repairing concrete crack construction technology being applicable to extremely frigid zones, be specially: heating water bath repairing concrete crack glue, then, by the crack on existing general regional repairing concrete crack method mending concrete component, then, concrete component after repairing with the totally-enclosed parcel of heat insulating material, afterwards, remove heat insulating material, namely complete the repairing of highlands distress in concrete.
Repairing concrete crack construction technology tool of the present invention has the following advantages:
1) adopt heating water bath to facilitate mixing and the stirring of patching material, material flowability is increased, constructability, improve efficiency of construction.
2) construct after heating materials, make patching material self contain certain heat, prevent material rapid solidification at low temperatures, but not normal consolidation, energy normal consolidation, makes material can complete consolidation preferably under low temperature in plateau environment and intensity improves.
3) heat preservation solidification method is after construction completes, and adopts Insulation, for patching material provides the temperature condition of needs, to ensure repair efficiency in the material cured stage.
4) equipment required for and instrument are simple and easy to purchase, cheap, and implementation process is easy to operation.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the invention will be further described.
By the restriction of plateau severe environmental conditions, when the concrete crack repair process in the general area of application is repaired the distress in concrete under altitude environment, repair efficiency is affected, carry out the concrete component of crack repairing, there is the phenomenons such as patching material comes off, scaling, cracking, its engineering effort reduces even entirely ineffective.In order to overcome above-mentioned problems of the prior art, the invention provides a kind of repairing concrete crack construction technology being applicable to extremely frigid zones, be specially: first in the water-bath of temperature 50 C ± 5 DEG C, heat repairing concrete crack glue, the BR-BFC glue (single-component de-alcoholized room temperature vulcanized silica gel) that the colloidal materials that field trial uses is produced for road and bridge new material Co., Ltd of this nation of Chengdu and this nation of BR-XB bridge concrete special repair sheets.These two kinds of repair sheets apply 2 years in highlands, respond well, then, by the crack on the repairing concrete crack glue mending concrete component after existing general regional repairing concrete crack method heating, then, with heat insulating material, the concrete component after repairing is carried out totally-enclosed parcel 5 ~ 7 days, remove heat insulating material, namely complete the repairing of highlands distress in concrete.
Because the repairing of distress in concrete is generally carried out in the wild, therefore, need to be equipped with generating equipment as power supply, be connected with firing equipment (as electrothermal furnace etc.) by the generator carried, water bath is placed on firing equipment; First in water bath, injecting a certain amount of water, control the water yield apart from tank top edge certain distance, having stayed surplus capacity for joining glue operation.Then start generating equipment, generating equipment provides electric energy to firing equipment, and firing equipment starts heating water bath, is injected by repair sheets simultaneously and joins glue container, joining glue container and put into water bath, and heat while stirring, and can construct to stirring.In heating process, water temperature controls at 50 DEG C ± 5 DEG C; Because reduce at the boiling point of highlands water, the too high boiling easily causing water of temperature of water, is not easy to join glue operation, and easily scalds staff, moreover the water of boiling also has the possibility be splashed in repair sheets, affects the performance of repair sheets.Repairing concrete crack glue after heating itself has heat, and mobility is better, can increase work efficiency, and can resist heat that low temperature in plateau environment causes and easily to run off adverse effect, ensures engineering effort.
After crack repairing on concrete component, with heat insulating material (as nano thermal insulation is cotton), this concrete component is closed parcel completely, and the heat insulating material that fixing (as fixing in bundled) is all.
According to Tibetan Plateau Meteorology data, in annual 7 ~ August, the time interval of temperature more than 10 DEG C is generally at the 9:00 ~ 20:00 of every day; Annual May, June and September, the time interval of temperature more than 10 DEG C is generally at the 10:00 ~ 19:00 of every day, and when there is anomalous weather, this time interval also will shorten.Therefore after the same day, concrete structure member crevices reparation construction completed, front heat insulating material the concrete component after repairing should be carried out totally-enclosed parcel when 19:00, the lap length of heat insulating material lap-joint is not less than 20cm, seam crossing heat insulating material environmental sealing of the same race between overlap, during environmental sealing centered by seam, both sides to this seam respectively extend 10 ~ 15cm, the position being about 10cm afterwards in seam both sides uses iron wire colligation firm respectively, after heat insulating material wraps up the concrete component repaired, in the colligation of heat insulating material external application iron wire spiral wrap, pitch is not more than 15cm.Utilize the feature that heat insulating material coefficient of thermal conductivity is low; the heat of protection patching material does not scatter and disappear, and can completely cut off the mend of outer low temperature air contact concrete component simultaneously, ensures the temperature that patching material solidification needs; thus the intensity of patching material is improved fast, ensure crack repairing effect.
Monitor by the temperature of patching material in concrete component after the totally-enclosed parcel of heat insulating material and ambient temperature, the contrast of two kinds of temperature, as shown in table 1.
The lower temperature of patching material of table 1 heat insulating material parcel and the contrast of ambient temperature
Monitored data in table 1 is the monitored data in Golmud, and before and after monitored data visible morning, the temperature of patching material exceeds nearly 5 DEG C than ambient temperature, and as can be seen here, the heat insulation effect of heat insulating material is obvious.After sunrise, external environment condition is directly shined upon, and first temperature raises, and therefore, in the morning when 08:00, environment temperature is higher than internal temperature, but internal temperature is still more than 10 DEG C.When there is overcast sky, the environment temperature on daytime has the situation lower than 10 DEG C, and internal temperature still can ensure more than 10 DEG C, as the temperature of 13:00 point monitoring on June 3.From the temperature data monitored, adopt heat preservation solidification method can ensure the temperature condition that patching material normal cure needs, ensure repairing concrete crack effect.
After crack repairing, general 5 days patching materials can complete solidification, and intensity can reach design load.For the purpose of conservative, insulation safeguard procedures 5 ~ 7 days are namely dismountable, and the heat insulating material pulled down can continue to use, and saves material, protection of the environment.
Concrete crack repair process of the present invention, joins glue method and in the special measure of heat preservation solidification method two kinds that cure stage adopts, can ensure repairing concrete crack effect joining the heating water bath that the glue stage adopts.
Claims (5)
1. one kind is applicable to the repairing concrete crack construction technology of extremely frigid zones, it is characterized in that, this construction technology is specially: heating water bath repairing concrete crack glue, then, by the crack on existing general regional repairing concrete crack method mending concrete component, then, concrete component after repairing with the totally-enclosed parcel of heat insulating material, afterwards, remove heat insulating material, namely complete the repairing of highlands distress in concrete.
2. be applicable to the repairing concrete crack construction technology of extremely frigid zones as claimed in claim 1, it is characterized in that, during parcel concrete component totally-enclosed with heat insulating material, the lap length of heat insulating material lap-joint is not less than 20cm, encapsulation process between overlap, after heat insulating material wraps up the concrete component repaired, with iron wire spiral wrap colligation heat insulating material, and pitch is not more than 15cm.
3. be applicable to the repairing concrete crack construction technology of extremely frigid zones as claimed in claim 1 or 2, it is characterized in that, the concrete component after repairing with the totally-enclosed parcel of heat insulating material 5 ~ 7 days.
4. be applicable to the repairing concrete crack construction technology of extremely frigid zones as claimed in claim 3, it is characterized in that, described heat insulating material adopts nano thermal insulation cotton.
5. be applicable to the repairing concrete crack construction technology of extremely frigid zones as claimed in claim 1, it is characterized in that, during heating water bath, the temperature of water-bath is 50 DEG C ± 5 DEG C, and heats while stirring.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510573053.7A CN105133853A (en) | 2015-09-10 | 2015-09-10 | Concrete crack repairing construction technology suitable for high and cold regions |
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| CN201510573053.7A CN105133853A (en) | 2015-09-10 | 2015-09-10 | Concrete crack repairing construction technology suitable for high and cold regions |
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| CN105133853A true CN105133853A (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545006A (en) * | 2016-02-22 | 2016-05-04 | 中国水利水电第十一工程局有限公司 | HF-3 double-component polysulfide building sealant crack repairing method |
| CN112727139A (en) * | 2020-12-30 | 2021-04-30 | 哈尔滨工业大学 | Filling type curing device and method for repairing concrete cracks in cold region in winter |
| CN113996512A (en) * | 2021-10-25 | 2022-02-01 | 国网江苏省电力有限公司检修分公司 | Construction process of acrylic acid adhesive for plugging power equipment under low-temperature condition |
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| JP2006306646A (en) * | 2005-04-27 | 2006-11-09 | Denki Kagaku Kogyo Kk | Alumina cement composition and repairing method using the same |
| CN102557729A (en) * | 2011-12-26 | 2012-07-11 | 中国矿业大学 | Reinforced concrete structure rapid repairing material and construction method thereof |
| CN103214227A (en) * | 2013-04-09 | 2013-07-24 | 彭兴礼 | Wetted-surface and underwater rapid repair adhesive |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006306646A (en) * | 2005-04-27 | 2006-11-09 | Denki Kagaku Kogyo Kk | Alumina cement composition and repairing method using the same |
| CN102557729A (en) * | 2011-12-26 | 2012-07-11 | 中国矿业大学 | Reinforced concrete structure rapid repairing material and construction method thereof |
| CN103214227A (en) * | 2013-04-09 | 2013-07-24 | 彭兴礼 | Wetted-surface and underwater rapid repair adhesive |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545006A (en) * | 2016-02-22 | 2016-05-04 | 中国水利水电第十一工程局有限公司 | HF-3 double-component polysulfide building sealant crack repairing method |
| CN112727139A (en) * | 2020-12-30 | 2021-04-30 | 哈尔滨工业大学 | Filling type curing device and method for repairing concrete cracks in cold region in winter |
| CN112727139B (en) * | 2020-12-30 | 2022-07-15 | 哈尔滨工业大学 | Curing method of concrete for repairing cracks in cold regions in winter |
| CN113996512A (en) * | 2021-10-25 | 2022-02-01 | 国网江苏省电力有限公司检修分公司 | Construction process of acrylic acid adhesive for plugging power equipment under low-temperature condition |
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Application publication date: 20151209 |