CN202421179U - Device for testing anti-cracking performance of early-age concrete under different temperature and humidity environment conditions - Google Patents
Device for testing anti-cracking performance of early-age concrete under different temperature and humidity environment conditions Download PDFInfo
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- CN202421179U CN202421179U CN2011205457208U CN201120545720U CN202421179U CN 202421179 U CN202421179 U CN 202421179U CN 2011205457208 U CN2011205457208 U CN 2011205457208U CN 201120545720 U CN201120545720 U CN 201120545720U CN 202421179 U CN202421179 U CN 202421179U
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Abstract
The utility model discloses a device for testing the anti-cracking performance of early-age concrete under different temperature and humidity environment conditions, which comprises a heat insulating and moisture preserving box body, a humidifier, a dehumidifier, a heating device, a cooling device, a temperature and humidity sensor, a temperature and humidity controller, a strain testing system, a computer and an anti-cracking device; the humidifier, the dehumidifier, the heating device, the cooling device, the temperature and humidity sensor and the anti-cracking device are arranged in the heat insulating and moisture preserving box body; the humidifier, the dehumidifier, the heating device, the cooling device and the temperature and humidity sensor are connected to the temperature and humidity controller; the temperature and humidity controller is connected with the strain testing system through the computer; the anti-cracking device comprises a bottom plate, an inner steel ring which is arranged on the bottom plate and a strain foil which is arranged on the inner steel ring; and the strain foil is also connected with the strain testing system. According to the utility model, the device has a simple structure, is convenient to detach, and is mainly used for determining the anti-cracking performance of the early-age concrete under different temperature and humidity environment conditions.
Description
Technical field
The utility model relates to the proving installation of early-age concrete cracking resistance under a kind of different temperatures and the humidity environment condition, belongs to the concrete construction field.
Background technology
In the field of civil engineering, the early-age concrete cracking resistance is very important.At xoncrete structure early during the length of time, concrete shrinkage, creeping all can cause concrete cracking, reduces the permanance of xoncrete structure.The rule of crack-resistant performance of concrete is by on top of, accurately measure under different temperatures and the humidity environment condition early-age concrete cracking resistance to estimate concrete early the length of time cracking performance and avoid the early-age concrete structure crack to occur having very important significance.
The method of measuring the early stage cracking resistance of concrete is at present all carried out under standard temperature humidity environment condition, can't measure the early stage cracking resistance of concrete under different temperatures, the humidity environment condition.
Summary of the invention
The utility model technical matters to be solved is the deficiency to above-mentioned prior art, and the early stage anticracking testing device of concrete under a kind of different temperatures, the humidity environment condition is provided.
In order to solve the problems of the technologies described above, the utility model adopts following technical scheme:
Early-age concrete anticracking testing device under a kind of different temperatures and the humidity environment condition; It is characterized in that: comprise heat and moisture preserving casing, humidifier, dehumidifier, heating apparatus, heat sink, Temperature Humidity Sensor, temperature and humidity controller, strain testing system, computing machine and cracking resistance device; Described humidifier, dehumidifier, heating apparatus, heat sink, Temperature Humidity Sensor and cracking resistance device are arranged in the heat and moisture preserving casing; Described humidifier, dehumidifier, heating apparatus, heat sink and Temperature Humidity Sensor are connected to described temperature and humidity controller, and this temperature and humidity controller is connected with the strain testing system through described computing machine; Described cracking resistance device comprises base plate, be arranged on the interior steel loop on the base plate and be arranged in foil gauge on the steel loop, described foil gauge also is connected with described strain testing system.
Described foil gauge descends on the quarterline in being arranged on the interior steel loop.
On described each mean line, all establish 4 foil gauges.
In described, also be provided with the temperature compensation sheet on the steel loop, this temperature compensation sheet and the corresponding one by one setting of described foil gauge, and the temperature compensation sheet adopts half-bridge to be connected with foil gauge.
Temperature and humidity controller changes the instruction of computing machine to temperature, relative humidity steering order into, and the duty that is used for controlling and regulating humidifier, dehumidifier, heating apparatus, heat sink is regulated the temperature and humidity in the warm casing of preserving moisture.Interior steel loop adopts indium steel to process, and the thermal expansivity of indium steel is 1/10 of a common iron, and during temperature variation, the volume change of interior steel loop can be ignored.The working strain gauge stickup scheme that adopts has improved the susceptibility of catching initial cracking time.Employing temperature self-compensation technology, the temperature compensation sheet has been eliminated the influence of temperature effect.
The utility model assay method step is following:
The first step: assembling cracking resistance device, with concreting in the cracking resistance device, on the interior steel loop in three layers of stickup of quarterline punishment totally 12 working strain gauges down.
Second step: concrete sample is put into the temperature casing of preserving moisture together with the cracking resistance device.Humidifier, dehumidifier, heating apparatus, heat sink, Temperature Humidity Sensor are placed in the heat and moisture preserving case, be connected to the outer temperature and humidity controller of heat and moisture preserving case through quad.Temperature and humidity controller, working strain gauge, temperature compensation sheet are connected to computing machine through quad.
The 3rd step: through Temperature Humidity Sensor real-time the temperature in the heat and moisture preserving casing, relative humidity are transferred to temperature and humidity controller, import humiture into value and setting value compares through computing machine, the adjusting temperature and humidity controller.Temperature and humidity controller changes the instruction of computing machine to temperature, relative humidity steering order into, and the duty that is used for controlling and regulating humidifier, dehumidifier, heating apparatus, heat sink is regulated the temperature and humidity in the warm casing of preserving moisture.
The 4th step: observation strain testing system, in case strain changes suddenly, promptly represent the test specimen cracking.
Compared with prior art, the beneficial effect of the utility model is:
Can measure early-age concrete cracking resistance under different temperatures and the humidity environment condition, quantitative test temperature, humidity are to the influence of early-age concrete cracking resistance.The steel loop volume change can be ignored in the indium steel, and the early-age concrete cracking resistance is exerted an influence hardly.The working strain gauge stickup scheme that adopts has improved the susceptibility of catching initial cracking time.
Description of drawings
Fig. 1 is the single unit system figure of the utility model proving installation.
Fig. 2 is the vertical view of cracking resistance device.
Fig. 3 is the half-bridge connection layout of foil gauge and temperature compensation sheet.
Wherein: 1, heat and moisture preserving casing, 2, humidifier, 3, dehumidifier, 4, heating apparatus, 5, heat sink; 6, Temperature Humidity Sensor, 7, temperature and humidity controller, 8, the strain testing system, 9, computing machine; 10, cracking resistance device, 11, exterior sheathing, 12, interior steel loop, 13, base plate; 14, high-strength bolt, 15, foil gauge, 16, the temperature compensation sheet, 17, quad.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
As shown in Figure 1; The utility model is measured early-age concrete cracking resistance under different temperatures and the humidity environment condition, and its proving installation comprises heat and moisture preserving casing 1, humidifier 2, dehumidifier 3, heating apparatus 4, heat sink 5, Temperature Humidity Sensor 6, temperature and humidity controller 7, strain testing system 8, computing machine 9, cracking resistance device 10.Cracking resistance device 10 comprises exterior sheathing 11, interior steel loop 12, base plate 13, high-strength bolt 14, foil gauge 15 and temperature compensation sheet 16; See shown in Figure 2; Foil gauge 15 is 12, in the going up of steel loop 12 down on the quarterline, a temperature compensation sheet 16 is set near each foil gauge 15 in being distributed on; Both adopt the half-bridge connection to carry out temperature compensation, and are as shown in Figure 3.Before the test, concrete sample is put into heat and moisture preserving casing 1 together with cracking resistance device 10, humidifier 2, dehumidifier 3, heating apparatus 4, heat sink 5, Temperature Humidity Sensor 6.Humidifier 2, dehumidifier 3, heating apparatus 4, heat sink 5, Temperature Humidity Sensor 6 are connected to the temperature and humidity controller 7 outside the heat and moisture preserving case 1 through quad.Temperature and humidity controller 7, foil gauge 15, temperature compensation sheet 16 are connected to computing machine 9 through quad 17.During test, temperature, the relative humidity with heat and moisture preserving casing 1 in real-time through Temperature Humidity Sensor 6 transfer to temperature and humidity controller 7, import humiture into value and setting value compares through computing machine 9, regulate temperature and humidity controller 7 then.Temperature and humidity controller changes the instruction of computing machine 9 to temperature, relative humidity steering order into, is used for controlling and regulating the duty of humidifier 2, dehumidifier 3, heating apparatus 4, heat sink 5.Observation strain testing system 8 in case strain changes suddenly, promptly representes the test specimen cracking.
Claims (4)
1. early-age concrete anticracking testing device under different temperatures and the humidity environment condition; It is characterized in that: comprise heat and moisture preserving casing (1), humidifier (2), dehumidifier (3), heating apparatus (4), heat sink (5), Temperature Humidity Sensor (6), temperature and humidity controller (7), strain testing system (8), computing machine (9) and cracking resistance device (10); Described humidifier (2), dehumidifier (3), heating apparatus (4), heat sink (5), Temperature Humidity Sensor (6) and cracking resistance device (10) are arranged in the heat and moisture preserving casing (1); Described humidifier (2), dehumidifier (3), heating apparatus (4), heat sink (5) and Temperature Humidity Sensor (6) are connected to described temperature and humidity controller (7), and this temperature and humidity controller (7) is connected with strain testing system (8) through described computing machine (9); Described cracking resistance device (10) comprises base plate, is arranged on the interior steel loop on the base plate and is arranged on the foil gauge on the interior steel loop that described foil gauge also is connected with described strain testing system (8).
2. early-age concrete anticracking testing device under different temperatures according to claim 1 and the humidity environment condition is characterized in that: described foil gauge descends on the quarterline in being arranged on the interior steel loop.
3. early-age concrete anticracking testing device under different temperatures according to claim 2 and the humidity environment condition is characterized in that: on described each mean line, all establish 4 foil gauges.
4. according to early-age concrete anticracking testing device under claim 1,2 or 3 described different temperatures and the humidity environment condition; It is characterized in that: in described, also be provided with temperature compensation sheet (16) on the steel loop; This temperature compensation sheet (16) and the corresponding one by one setting of described foil gauge, and temperature compensation sheet (16) adopts half-bridge to be connected with foil gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205457208U CN202421179U (en) | 2011-12-23 | 2011-12-23 | Device for testing anti-cracking performance of early-age concrete under different temperature and humidity environment conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205457208U CN202421179U (en) | 2011-12-23 | 2011-12-23 | Device for testing anti-cracking performance of early-age concrete under different temperature and humidity environment conditions |
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| Publication Number | Publication Date |
|---|---|
| CN202421179U true CN202421179U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011205457208U Expired - Fee Related CN202421179U (en) | 2011-12-23 | 2011-12-23 | Device for testing anti-cracking performance of early-age concrete under different temperature and humidity environment conditions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565310A (en) * | 2011-12-23 | 2012-07-11 | 河海大学 | Test device and determination method of anti-cracking performance of early-age concrete under different temperature and humidity environmental conditions |
| CN105044315A (en) * | 2015-08-03 | 2015-11-11 | 南京建工集团有限公司 | Concrete crack resistance testing device with variable constraint degree and testing method |
| CN106197783A (en) * | 2016-06-20 | 2016-12-07 | 湖北大学 | A kind of test method of direct test mass concrete temperature stress |
-
2011
- 2011-12-23 CN CN2011205457208U patent/CN202421179U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102565310A (en) * | 2011-12-23 | 2012-07-11 | 河海大学 | Test device and determination method of anti-cracking performance of early-age concrete under different temperature and humidity environmental conditions |
| CN105044315A (en) * | 2015-08-03 | 2015-11-11 | 南京建工集团有限公司 | Concrete crack resistance testing device with variable constraint degree and testing method |
| CN105044315B (en) * | 2015-08-03 | 2016-08-24 | 南京建工集团有限公司 | The crack-resistant performance of concrete test device and method of testing that a kind of constraint degree is variable |
| CN106197783A (en) * | 2016-06-20 | 2016-12-07 | 湖北大学 | A kind of test method of direct test mass concrete temperature stress |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20131223 |