CN103224345A - Self-healing concrete structural body - Google Patents
Self-healing concrete structural body Download PDFInfo
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- CN103224345A CN103224345A CN2013101334113A CN201310133411A CN103224345A CN 103224345 A CN103224345 A CN 103224345A CN 2013101334113 A CN2013101334113 A CN 2013101334113A CN 201310133411 A CN201310133411 A CN 201310133411A CN 103224345 A CN103224345 A CN 103224345A
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- wire rod
- memory polyurethane
- shape memory
- bonding
- polyurethane wire
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Abstract
The invention relates to a self-healing concrete structural body, which includes a reinforced concrete structural body made by grouting and pouring. A plurality of shape memory polyurethane wires and a plurality of bonding capsules are laid in the reinforced concrete structural body. During laying, the tension length of the shape memory polyurethane wires accounts for 25%-40% of a shape memory polyurethane wire limit length. The bonding capsules are glass tubes with a sealed adhesive. With the invention, the concrete structural body can have certain inhibition ability and self-healing ability, the cost is low, and the laying is convenient.
Description
Technical field
The present invention relates to a kind of reinforced-concrete construction technology, relate in particular to the concrete body of a kind of energy self-healing.
Background technology
As time goes on, cracking can appear in Steel Concrete under the composite factor effect of multiple complexity, and its cracking process is irreversible; In the existing theory, the rimose problem in use appears at Steel Concrete, from the fissured stage of the passive processing in artificial outside, develop into and make concrete self possess the stage of crack repair ability, wherein more typically have: adopt the Ni-Ti alloy that distress in concrete is carried out selfreparing, but the Ni-Ti alloy costs an arm and a leg, be not suitable for a large amount of employings, especially in some medium and small engineerings, will cause construction costs significantly to improve.
Summary of the invention
At the problem in the background technology, the present invention proposes the concrete body of a kind of energy self-healing, comprise the skeleton construction body that adopts the grouting mode of building to make, its improvement is: be equipped with many strips memory polyurethane wire rod and a plurality of bonding capsule in the skeleton construction body; The stretch-draw length of described shape memory polyurethane wire rod when laying is 25% ~ 40% of shape memory polyurethane wire rod critical length; Described bonding capsule is the Glass tubing that is packaged with sizing agent.
The making method of aforementioned structure is: before the skeleton construction body is in the milk, the stretch-draw of shape memory polyurethane wire rod is good, carry out grouting operation then, wait to irritate to certain altitude, in slurry, lay the bonding capsule, continue grouting then, after pouring into certain altitude again, continue to lay the bonding capsule, repeat repeatedly to finish until grouting operation.
Aforementioned structure plays a role like this: the cracking of skeleton construction body is the process of a progressive creep, after the crack appears in the skeleton construction body, the concrete body of both sides, crack drives shape memory polyurethane wire rod generation deformation, because shape memory polyurethane wire rod itself just is in tensile state, along with fissured appearance, it is big that the stretch-draw amount of shape memory polyurethane wire rod further becomes, the shape memory polyurethane wire rod also increases the reactive force of the concrete body of both sides, crack thereupon, this is inhibited to fissured further expansion, simultaneously, after negative stress relieved, be after fissured width stops to enlarge, the pulling force that the shape memory polyurethane wire rod applies to the concrete body of both sides, crack can make the crack contraction to a certain degree occur and then reach the purpose that makes the crack healing; On the other hand, after the crack occurs, the concrete body of both sides, crack drives Glass tubing two end motions, in case fissured width creep causes Glass tubing to break, the sizing agent in the Glass tubing will flow out, and the crack is filled, after sizing agent solidifies, the crack is made up by sizing agent, the concrete body of both sides, crack is played reinforcement effect, thereby realize fissured self-healing.
In order to improve the shape memory polyurethane wire rod to fissured restraining effect, the present invention has also done following improvement: wall scroll shape memory polyurethane wire rod is made through torsade technology by many shape memory polyurethane lines.
Described sizing agent can adopt following preferred material: described sizing agent is chloroprene rubber or polyurethane adhesive.
Based on aforementioned schemes, the invention allows for the following preferred plan of establishment: described shape memory polyurethane wire rod and the bonding capsule paving mode be: the shape memory polyurethane wire rod axially along the skeleton construction axon to extension, many strips memory polyurethane wire rod is parallel to each other; The bonding columella to shape memory polyurethane wire rod axially parallel; The shape memory polyurethane wire rod is axially gone up the same position place and evenly is equipped with a plurality of bonding capsules, and a plurality of bonding capsules at same position place and many strips memory polyurethane wire rod are crisscross arranged; The shape memory polyurethane wire rod is axially gone up the different positions place and is equipped with a plurality of bonding capsules, and a plurality of bonding capsules at different positions place are along the axial spaced set of shape memory polyurethane wire rod.
Arranged side by side with aforementioned paving mode, the paving mode of described shape memory polyurethane wire rod and bonding capsule also can adopt following scheme: the part in many strips memory polyurethane wire rod to extension, forms axial wire rod along the skeleton construction axon; Another part in many strips memory polyurethane wire rod vertical direction of wire rod vertically extends, and forms horizontal wire rod; Axial and the axial wire rod of a part of bonding capsule is parallel, and another part bonds the axial of capsule with laterally wire rod is parallel; The shape memory polyurethane wire rod is axially gone up different positions place, a plurality of bonding capsules parallel to each other along its axial direction due spaced set; A plurality of bonding capsules and shape memory polyurethane wire rod that the shape memory polyurethane wire rod is axially gone up the same position place are crisscross arranged.
Useful technique effect of the present invention is: make concrete body possess certain inhibition ability and self-healing ability to the crack expansion, with low cost, laying convenience.
Description of drawings
Fig. 1, paving mode structural representation one of the present invention;
The cross sectional representation of Fig. 2, structure shown in Figure 1;
Fig. 3, paving mode structural representation two of the present invention
The cross sectional representation of Fig. 4, structure shown in Figure 3.
Embodiment
The concrete body of a kind of energy self-healing comprises the skeleton construction body that adopts the grouting mode of building to make, and is equipped with many strips memory polyurethane wire rod 1 and a plurality of bonding capsule 2 in the skeleton construction body; The stretch-draw length of described shape memory polyurethane wire rod 1 when laying is 25% ~ 40% of shape memory polyurethane wire rod 1 critical length; Described bonding capsule 2 is for being packaged with the Glass tubing of sizing agent.
Further, wall scroll shape memory polyurethane wire rod 1 is made through torsade technology by many shape memory polyurethane lines.
Further, described sizing agent is chloroprene rubber or polyurethane adhesive.
Further, the paving mode of described shape memory polyurethane wire rod 1 and bonding capsule 2 is: shape memory polyurethane wire rod 1 axially along the skeleton construction axon to extension, many strips memory polyurethane wire rod 1 is parallel to each other; Bonding capsule 2 axial and shape memory polyurethane wire rod 1 axially parallels; Shape memory polyurethane wire rod 1 is axially gone up the same position place and evenly is equipped with a plurality of bonding capsules 2, and a plurality of bonding capsules 2 at same position place are crisscross arranged with many strips memory polyurethane wire rod 1; Shape memory polyurethane wire rod 1 is axially gone up the different positions place and is equipped with a plurality of bonding capsules 2, and a plurality of bonding capsules 2 at different positions place are along shape memory polyurethane wire rod 1 axial spaced set.After adopting this scheme, the crack of single position can't make the bonding capsule 2 of axially going up the different positions place all be activated, have only near the bonding capsule 2 the crack can occur breaking and discharging sizing agent, thereby make structure can tackle the make progress crack at different positions place of skeleton construction axon.
Further, the paving mode of described shape memory polyurethane wire rod 1 and bonding capsule 2 is: the part in many strips memory polyurethane wire rod 1 to extension, forms axial wire rod along the skeleton construction axon; Another part in many strips memory polyurethane wire rod 1 vertical direction of wire rod vertically extends, and forms horizontal wire rod; Axial and the axial wire rod of a part of bonding capsule 2 is parallel, and another part bonds the axial of capsule 2 with laterally wire rod is parallel; Shape memory polyurethane wire rod 1 is axially gone up different positions place, a plurality of bonding capsules 2 parallel to each other along its axial direction due spaced set; A plurality of bonding capsules 2 that shape memory polyurethane wire rod 1 is axially gone up the same position place are crisscross arranged with shape memory polyurethane wire rod 1.Than preceding a kind of paving mode, the fracture orientation that preceding a kind of paving mode can be tackled is less relatively, can only tackle fracture strike angle and skeleton construction axon to angle in 60 cracks of degree in ~ 90 degree scopes, horizontal wire rod of this kind and axial wire rod bonded paving mode, the fracture strike that structure can be tackled almost reaches omnidirectional.
In order to guarantee to make full use of the repairing solidification effect of sizing agent, spill and leakage and curing appear in the sizing agent that should avoid pouring into Glass tubing, and when making bonding capsule 2, the Glass tubing port needs careful sealing; During sealing, available seal gum after glue to be sealed is fixed, passes the Glass tubing port closed seal gum and sizing agent is injected Glass tubing with syringe, with seal gum inlet is shut then.
Making test specimen: before the concrete depositing, perform the height mark of laying bonding capsule 2 at the template medial surface, and shape memory polyurethane wire rod 1(shape memory polyurethane wire rod 1 lower end can be fixed on the reinforcing bar) stretch-draw is good; Carry out grouting operation then, stop slip casting when slip casting highly reaches the position of mark, the capsule 2 that will bond inserts in the concrete, continue slip casting then to next mark height place, lay the bonding capsule 2 that this is highly located then, repeatable operation, finish until 2 layings of bonding capsule, finally obtain test specimen;
To test specimen apply evenly, the successive external loads, loading velocity is controlled in MPa p.s. 0.05, to test specimen cracking, and the load intensity during the record cracking.Behind test specimen cracking, remove load at once and flaw size measured and record, remove load after, fracture width maximum position place, shrinking appears in the width of the obvious visible crack of naked eyes; By heating sizing agent quicken to be solidified, treat the crack shrink stop fully after, test specimen is carried out load test to test specimen again destroys, the load intensity when record destroys; Statistic data after the test of many times shows, more than 90% of load intensity the when load intensity of the test specimen after the self-healing when destroying can reach first the cracking.
Claims (5)
1. the concrete body of an energy self-healing comprises the skeleton construction body that adopts the grouting mode of building to make, and it is characterized in that: be equipped with many strips memory polyurethane wire rod (1) and a plurality of bonding capsule (2) in the skeleton construction body; The stretch-draw length of described shape memory polyurethane wire rod (1) when laying is 25% ~ 40% of shape memory polyurethane wire rod (1) critical length; Described bonding capsule (2) is for being packaged with the Glass tubing of sizing agent.
2. the concrete body of energy according to claim 1 self-healing, it is characterized in that: wall scroll shape memory polyurethane wire rod (1) is made through torsade technology by many shape memory polyurethane lines.
3. the concrete body of energy according to claim 1 self-healing, it is characterized in that: described sizing agent is chloroprene rubber or polyurethane adhesive.
4. the concrete body of energy according to claim 1 self-healing is characterized in that: the paving mode of described shape memory polyurethane wire rod (1) and bonding capsule (2) is:
Shape memory polyurethane wire rod (1) axially along the skeleton construction axon to extension, many strips memory polyurethane wire rod (1) is parallel to each other;
Axial and shape memory polyurethane wire rod (1) axially parallel of bonding capsule (2); Shape memory polyurethane wire rod (1) is axially gone up the same position place and evenly is equipped with a plurality of bonding capsules (2), and a plurality of bonding capsules (2) at same position place are crisscross arranged with many strips memory polyurethane wire rod (1); Shape memory polyurethane wire rod (1) is axially gone up the different positions place and is equipped with a plurality of bonding capsules (2), and a plurality of bonding capsules (2) at different positions place are along the axial spaced set of shape memory polyurethane wire rod (1).
5. the concrete body of energy according to claim 1 self-healing is characterized in that: the paving mode of described shape memory polyurethane wire rod (1) and bonding capsule (2) is:
Part in many strips memory polyurethane wire rod (1) to extension, forms axial wire rod along the skeleton construction axon; Another part in many strips memory polyurethane wire rod (1) vertical direction of wire rod vertically extends, and forms horizontal wire rod;
Axial and the axial wire rod of a part of bonding capsule (2) is parallel, and another part bonds the axial of capsule (2) with laterally wire rod is parallel; Shape memory polyurethane wire rod (1) is axially gone up different positions place, a plurality of bonding capsules (2) parallel to each other along its axial direction due spaced set; A plurality of bonding capsules (2) that shape memory polyurethane wire rod (1) is axially gone up the same position place are crisscross arranged with shape memory polyurethane wire rod (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101334113A CN103224345A (en) | 2013-04-17 | 2013-04-17 | Self-healing concrete structural body |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013101334113A CN103224345A (en) | 2013-04-17 | 2013-04-17 | Self-healing concrete structural body |
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| CN103224345A true CN103224345A (en) | 2013-07-31 |
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| CN2013101334113A Pending CN103224345A (en) | 2013-04-17 | 2013-04-17 | Self-healing concrete structural body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839832A (en) * | 2016-03-23 | 2016-08-10 | 武汉大学 | Self-sensing self-healing concrete member |
| CN106640171A (en) * | 2017-03-14 | 2017-05-10 | 山东科技大学 | Air door with self-repairing function and construction method thereof |
| CN107989399A (en) * | 2017-12-20 | 2018-05-04 | 佛山科学技术学院 | A kind of intelligent concrete prosthetic device |
-
2013
- 2013-04-17 CN CN2013101334113A patent/CN103224345A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 陈高: "梁桥混凝土裂缝智能修复骨架系统研究", 《中国优秀硕士学位全文数据库工程科技Ⅱ辑》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839832A (en) * | 2016-03-23 | 2016-08-10 | 武汉大学 | Self-sensing self-healing concrete member |
| CN106640171A (en) * | 2017-03-14 | 2017-05-10 | 山东科技大学 | Air door with self-repairing function and construction method thereof |
| CN106640171B (en) * | 2017-03-14 | 2019-07-19 | 山东科技大学 | A kind of air door and its construction method with self-repair function |
| CN107989399A (en) * | 2017-12-20 | 2018-05-04 | 佛山科学技术学院 | A kind of intelligent concrete prosthetic device |
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Application publication date: 20130731 |