CN102373666A - Method for quickly roughening concrete by retarder flushing - Google Patents
Method for quickly roughening concrete by retarder flushing Download PDFInfo
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- CN102373666A CN102373666A CN2011102773091A CN201110277309A CN102373666A CN 102373666 A CN102373666 A CN 102373666A CN 2011102773091 A CN2011102773091 A CN 2011102773091A CN 201110277309 A CN201110277309 A CN 201110277309A CN 102373666 A CN102373666 A CN 102373666A
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Abstract
The invention provides a method for quickly roughening concrete by retarder flushing. The method is characterized by comprising the following steps of: diluting retarder with water to form a retarder solution; uniformly spraying on the concrete surface of a bridge floor with an agricultural sprayer, so that the retarder and the concrete surface are sufficiently bonded; after the concrete is subject to initial setting, the concrete on the bridge floor is flushed at a certain dip angle by using a high pressure water gun, cement mortar on the surface is flushed by using the high pressure water gun; a broom is cooperated when the concrete surface is flushed, and floating slurry flushed by the water gun is swept by the broom, and uniform aggregate is exposed on the concrete surface; geotextile is used for covering after flushing, and watering is carried out for curing; and the bridge floor is cleaned with a powerful cleaning tanker before an asphalt waterproof layer is constructed, and the bridge floor is cleaned by blowing and sweeping.
Description
Technical field
The invention belongs to field of civil engineering, be specifically related to the quick roughening processing method of top dressing behind a kind of concrete.
Technical background
The form of construction work of having watered after many members have all been taked in the concrete-bridge is like hinge seam, sealing off and covering anchorage, prefabricated case beam middle part connector or the like.The construction of these members all requires to cut a hole hair at existing concrete surface, i.e. roughening is handled.The density and the degree of depth of not cutting a hole hair or cutter hair as if casting area are not enough, greatly reduce the cast effect of New-old concrete, have destroyed the globality of cement concrete layer, cause the reduction of the inhomogeneous or adhesive property of stressed transmission, thereby cause fall sharply application life.From the result of all kinds of bridge defect statistics, also clearly illustrated that this point.How effectively to guarantee bonding surface concrete roughening effect, promote the bond quality of New-old concrete, become the serious quality problems of puzzlement bridge engineering, receive people's common concern.
Existing common artificial roughening technology and mechanical roughening technology exist more weak point in personnel's input, financial cost, environment pollution etc.; How to promote bonding surface concrete roughening quality, become the fast-developing major issue of puzzlement new generation of bridge construction project.
. summary of the invention
The objective of the invention is to overcome the defective of prior art; A kind of concrete retarding quick roughening method of washing by water is provided; This method can solve existing artificial roughening technology and problem such as mechanical roughening technician input amount is big, financial cost is high, environment pollution is big; And can guarantee that bonding surface concrete roughening quality is greatly improved at aspects such as uniformity and stability, satisfies requirements for quality control.
The technical scheme that realizes the object of the invention is: a kind of concrete retarding quick roughening method of washing by water, and this method comprises the following steps: step 1 pair retarding agent dilute with water, forms retarding agent solution;
Step 2 is sprayed at the surface of bridge deck concrete uniformly with agricultural atomizer, makes retarding agent fully combine with concrete surface;
After step 3 concrete initial set, become the flushing of certain inclination angle facing to bridge deck concrete, wash away the wash cement mortar with giant with giant; Concrete surface water towards the time cooperate besom, swept with besom by the laitance that hydraulic giant washes away, at this moment concrete surface will expose uniform aggregate;
Step 4 water covers with geotextiles after dashing and accomplishing, the watering health;
Step 5 was cleaned bridge floor with powerful cleaning Vehicle before the construction asphalt tanking, and purged clean.
As further improvement of the present invention, the retarding agent that adopts in the said step 1 meets following condition: turnover rate rises to 8, and the initial setting time difference is for+60 ~+120, and compressive strength rate 7 days was 120, and compressive strength rate 28 days was 120; Coefficient of softening is 0.55;
The mass ratio of retarding agent and water is 1:1 in the said retarding agent solution.
As further improvement of the present invention, in the said step 2, the consumption of retarding agent solution is 0.25～0.35 kg/m
2Because the horizontal wall inscription of compound bridge floor and longitudinal gradient influence should be hanged down back high (identical with the concreting order) earlier when spraying retarding agent solution.
As further improvement of the present invention, in the said step 3, said concrete initial set is preferably later after the concreting 5 ~ 10 hours.
As further improvement of the present invention, in the said step 3, wash away wash cement mortar 3 mm-5 mm with giant.
As a further improvement on the present invention, in the said step 3, selecting the pressure of giant is 24.5MPa.
Beneficial effect of the present invention is, is the quick roughening technology of core with slow setting bath method, not only can increase substantially the construction quality of bond between fresh and hardened concretes, can than other roughening treatment technologies remarkable advantages be arranged at aspects such as economy and environmental protection simultaneously.The lifting that both can be aspects such as concrete quality and environmental requirement contributes; Can for Other Engineering provides good reference, have great technical economic benefit and social benefit through a complete set of key technology of the quick roughening processing of top dressing behind the summary concrete again.
The specific embodiment
Embodiment 1
A kind of concrete retarding quick roughening method of washing by water, this method comprises the following steps:
Step 1 pair retarding agent dilute with water forms retarding agent solution; The retarding agent that adopts meets following condition: turnover rate rises to 8, and the initial setting time difference is for+60 ~+120, and compressive strength rate 7 days was 120, and compressive strength rate 28 days was 120; Coefficient of softening is 0.55; The mass ratio of retarding agent and water is 1:1 in the retarding agent solution.
Step 2 is sprayed at the surface of bridge deck concrete uniformly with agricultural atomizer, makes retarding agent fully combine with concrete surface; Because the horizontal wall inscription of compound bridge floor and longitudinal gradient influence should be hanged down back high (identical with the concreting order) earlier when spraying retarding agent solution.
Step 3 is after the concreting 5 ~ 10 hours, uses pressure to become certain inclination angle to wash as the giant of 24.5MPa facing to bridge deck concrete, washes away wash cement mortar 3 mm-5 mm with giant; Concrete surface water towards the time cooperate besom, swept with besom by the laitance that hydraulic giant washes away, at this moment concrete surface will expose uniform aggregate.
Step 4 water covers with geotextiles after dashing and accomplishing, the watering health.
Step 5 was cleaned bridge floor with powerful cleaning Vehicle before the construction asphalt tanking, and purged clean.
Claims (7)
1. a concrete retarding quick roughening method of washing by water, it is characterized in that: this method comprises the following steps:
Step 1 pair retarding agent dilute with water forms retarding agent solution;
Step 2 is sprayed at the surface of bridge deck concrete uniformly with agricultural atomizer, makes retarding agent fully combine with concrete surface;
After step 3 concrete initial set, become the flushing of certain inclination angle facing to bridge deck concrete, wash away the wash cement mortar with giant with giant; Concrete surface water towards the time cooperate besom, swept with besom by the laitance that hydraulic giant washes away, at this moment concrete surface will expose uniform aggregate;
Step 4 water covers with geotextiles after dashing and accomplishing, the watering health;
Step 5 was cleaned bridge floor with powerful cleaning Vehicle before the construction asphalt tanking, and purged clean.
2. the concrete retarding according to claim 1 quick roughening method of washing by water; It is characterized in that: the retarding agent that adopts in the said step 1 meets following condition: turnover rate rises to 8; The initial setting time difference is for+60 ~+120, and compressive strength rate 7 days was 120, and compressive strength rate 28 days was 120; Coefficient of softening is 0.55; The mass ratio of retarding agent and water is 1:1 in the said retarding agent solution.
3. the concrete retarding according to claim 1 quick roughening method of washing by water, it is characterized in that: in the said step 2, the consumption of retarding agent solution is 0.25～0.35 kg/m
2
4. the concrete retarding according to claim 1 quick roughening method of washing by water is characterized in that: in the said step 2, should hang down the back height when spraying retarding agent solution earlier.
5. the concrete retarding according to claim 1 quick roughening method of washing by water is characterized in that: in the said step 3, said concrete initial set is preferably after the concreting 5 ~ 10 hours later.
6. the concrete retarding according to claim 1 quick roughening method of washing by water is characterized in that: in the said step 3, wash away wash cement mortar 3 mm-5 mm with giant.
7. the concrete retarding according to claim 1 quick roughening method of washing by water is characterized in that: in the said step 3, selecting the pressure of giant is 24.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102773091A CN102373666A (en) | 2011-09-19 | 2011-09-19 | Method for quickly roughening concrete by retarder flushing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102773091A CN102373666A (en) | 2011-09-19 | 2011-09-19 | Method for quickly roughening concrete by retarder flushing |
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| Publication Number | Publication Date |
|---|---|
| CN102373666A true CN102373666A (en) | 2012-03-14 |
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| CN2011102773091A Pending CN102373666A (en) | 2011-09-19 | 2011-09-19 | Method for quickly roughening concrete by retarder flushing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452320A (en) * | 2013-09-05 | 2013-12-18 | 中铁上海工程局有限公司 | Concrete dabbing construction method |
| CN104372952A (en) * | 2014-11-19 | 2015-02-25 | 中交二公局第五工程有限公司 | Unstressed permeating washing scabbling technology |
| CN104894975A (en) * | 2015-04-29 | 2015-09-09 | 肖礼经 | Roughening method of concrete |
| 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 |
| CN107761579A (en) * | 2017-09-16 | 2018-03-06 | 中铁十九局集团第二工程有限公司 | A kind of method for handling concrete secondary faying face |
| CN111411647A (en) * | 2020-04-25 | 2020-07-14 | 五冶集团上海有限公司 | Method for processing construction joint of wide and large section of building |
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| JP2007002634A (en) * | 2005-06-22 | 2007-01-11 | Ken Shinjo | Exfoliation/falling preventive method for underlaying mortar layer or mortar layer with attached tile in concrete skeleton |
| 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 |
| CN101487295A (en) * | 2009-02-05 | 2009-07-22 | 中建三局第二建设工程有限责任公司 | Method for improving concrete horizontal construction joint bonding layer quality |
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2011
- 2011-09-19 CN CN2011102773091A patent/CN102373666A/en active Pending
Patent Citations (4)
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| JPH06136950A (en) * | 1992-10-26 | 1994-05-17 | Daicel Chem Ind Ltd | Releasing agent for concrete form |
| JP2007002634A (en) * | 2005-06-22 | 2007-01-11 | Ken Shinjo | Exfoliation/falling preventive method for underlaying mortar layer or mortar layer with attached tile in concrete skeleton |
| 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 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103452320A (en) * | 2013-09-05 | 2013-12-18 | 中铁上海工程局有限公司 | Concrete dabbing construction method |
| CN104372952A (en) * | 2014-11-19 | 2015-02-25 | 中交二公局第五工程有限公司 | Unstressed permeating washing scabbling technology |
| CN104894975A (en) * | 2015-04-29 | 2015-09-09 | 肖礼经 | Roughening method of concrete |
| CN105803942A (en) * | 2015-04-29 | 2016-07-27 | 肖礼经 | Concrete roughening method |
| CN105803942B (en) * | 2015-04-29 | 2017-05-24 | 肖礼经 | Concrete roughening method |
| 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 |
| CN107761579A (en) * | 2017-09-16 | 2018-03-06 | 中铁十九局集团第二工程有限公司 | A kind of method for handling concrete secondary faying face |
| CN111411647A (en) * | 2020-04-25 | 2020-07-14 | 五冶集团上海有限公司 | Method for processing construction joint of wide and large section of building |
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Application publication date: 20120314 |