CN211602783U - Grit aggregate saturated surface dry water absorption rate survey device - Google Patents
Grit aggregate saturated surface dry water absorption rate survey device Download PDFInfo
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- CN211602783U CN211602783U CN201922032519.9U CN201922032519U CN211602783U CN 211602783 U CN211602783 U CN 211602783U CN 201922032519 U CN201922032519 U CN 201922032519U CN 211602783 U CN211602783 U CN 211602783U
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Abstract
The utility model discloses a sandstone aggregate saturated surface dry water absorption rate measuring device, which comprises a temperature and humidity control box, an automatic acquisition and recording device, an upper computer, an electronic balance and a sample tray; the temperature and humidity control box top is provided with the inside and external through-hole of intercommunication, the sample dish through the stay cord with electronic balance links to each other, the stay cord passes the through-hole will the sample dish is hung inside the temperature and humidity control box, electronic balance with automatic acquisition recorder, automatic acquisition recorder with the host computer links to each other. The advantages are that: the sand saturation face dry state can be accurately determined, the automation degree is high, the influence of operators is avoided, and the accuracy of the test result is high.
Description
Technical Field
The utility model relates to a civil engineering technical field especially relates to a grit aggregate saturation surface dry water absorption rate survey device.
Background
The dry water absorption of the saturated surface of the sandstone material is an important reference parameter for evaluating the quality characteristics of concrete aggregate and the mix proportion design of concrete, and means that the water content of the sandstone material in the dry state of the saturated surface accounts for the mass of the sandstone material in the dry state or the dry state of the saturated surface. The saturation surface dry state is a state in which the pores of the sandstone material particles, which can be penetrated by water, are filled with water, but the surfaces of the particles have no free water.
At present, no corresponding device is used for measuring the sand and stone saturation surface dry water absorption rate, the sand and stone saturation surface dry state is a critical state, judgment is not easy, and the sand and stone saturation surface dry water absorption rate is easy to miss.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a grit aggregate saturated surface dry water absorption rate survey device to solve the aforementioned problem that exists among the prior art.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
a device for measuring the dry water absorption of a saturated surface of a sandstone aggregate comprises a temperature and humidity control box, an automatic acquisition and recording device, an upper computer, an electronic balance and a sample disc; the temperature and humidity control box top is provided with the inside and external through-hole of intercommunication, the sample dish through the stay cord with electronic balance links to each other, the stay cord passes the through-hole will the sample dish is hung inside the temperature and humidity control box, electronic balance with automatic acquisition recorder, automatic acquisition recorder with the host computer links to each other.
Preferably, the bottom of the electronic balance is provided with a hook, and one end of the pull rope, which is far away from the sample disc, is connected with the hook.
Preferably, the measuring range of the electronic balance is not less than 5.0kg, and the precision of the electronic balance is not less than 0.01 g.
Preferably, the pull rope is spaced from the circumferential wall of the through hole by a certain distance.
The utility model has the advantages that: the utility model provides a survey device can accurately confirm the grit saturation face dry state, and degree of automation is high, does not receive operating personnel to influence, and the test result accuracy is high.
Drawings
FIG. 1 is a schematic view of a measuring apparatus according to an embodiment of the present invention.
In the figure: 1. a temperature and humidity control box; 2. an electronic balance; 3. an automatic acquisition and recording device; 4. an upper computer; 5. a sample tray; 6. pulling a rope; 7. a through hole; 8. and a data line.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.
Example one
As shown in fig. 1, the present embodiment provides a device for measuring a sand aggregate saturated surface dry water absorption rate, where the device includes a temperature and humidity control box 1, an automatic acquisition and recording device 3, an upper computer 4, an electronic balance 2, and a sample tray 5; the top of the temperature and humidity control box 1 is provided with a through hole 7 for communicating the inside of the temperature and humidity control box with the outside, the sample disc 5 is connected with the electronic balance 2 through a pull rope 6, the pull rope 6 penetrates through the through hole 7 to hang the sample disc 5 inside the temperature and humidity control box 1, the electronic balance 2 is connected with the automatic collection recording device 3, and the automatic collection recording device 3 is connected with the upper computer 4.
In this embodiment, the bottom of the electronic balance 2 is provided with a hook, and one end of the pull rope 6 far away from the sample disc 5 is connected with the hook.
In this embodiment, the measuring range of the electronic balance 2 is not less than 5.0kg, and the precision of the electronic balance 2 is not less than 0.01 g.
In this embodiment, the pull cord 6 is spaced from the circumferential wall of the through hole 7 by a predetermined distance.
In this embodiment, temperature and humidity control box 1 can be according to actual demand temperature regulation and humidity, and the experimenter can adjust by oneself.
In this embodiment, will electronic balance 2 sets up the top upper surface of atmospheric control case 1 makes electronic balance 2 can very steady measurement, can not take place the slope and influence the measuring result, also can be convenient for simultaneously stay cord 6 passes through-hole 7 smoothly and connects on electronic balance 2.
In this embodiment, the electronic balance 2 is connected to the automatic acquisition and recording device 3 through a data line 8, and the automatic acquisition and recording device 3 can record the mass of the sample in the sample tray 5 obtained by the electronic balance 2 through measurement and the time corresponding to the mass, and transmit these data to the upper computer 4.
In this embodiment, the automatic acquisition and recording device 3 is connected with the upper computer 4 through a data line 8, and the upper computer 4 is provided with related software which can automatically calculate and draw a change curve of the water evaporation rate of the sample along with time according to the data transmitted by the automatic acquisition and recording device.
Example two
The specific process of measuring the sand by using the measuring device in the embodiment is as follows:
1. taking a proper amount of sand, filling the sand into a pretreatment container, and injecting clear water into the pretreatment container to enable the water surface to be 2cm higher than the sand; soaking the sand in clear water for 24 hours, and keeping the indoor temperature at 20 ℃;
2. starting the temperature and humidity control box 1, and controlling the temperature in the temperature and humidity control box 1 to be 10-80 ℃ and the relative humidity to be 10-80%; opening the electronic balance 2, hanging the sample disc 5 on a hook of the electronic balance 2 by using the pull rope 6, and resetting the electronic balance 2;
3. after sand is soaked for 24 hours, pouring out water in the pretreatment container, weighing a certain amount of sand as a sand sample, and flatly spreading the sand sample in the sample tray 5;
4. starting the automatic acquisition and recording device 3 and the upper computer 4 to start measurement; after the quality of the sand sample does not change any more, adjusting the temperature of the temperature and humidity control box 1 to 105 ℃, drying the sand sample to constant weight, and recording the quality of the sand sample as G0；
5. According to the change of the sand sample quality along with time, calculating and drawing a change curve of the water evaporation rate of the sand sample along with time, finding out the inflection point time when the water evaporation rate starts to obviously decrease, and recording the sand sample quality G corresponding to the inflection point time1(ii) a The inflection time at which the rate of water evaporation begins to drop significantly is the time at which the sand reaches saturation face dryness;
6. calculating the dry water absorption T of the saturated surface of the sand based on the dry sand of the saturated surface0And the dry water absorption T of the saturated surface of the sand based on the dry sand1。
In this example, the dry water absorption T of the saturated surface of the sand based on the dry sand of the saturated surface0As calculated by the following formula,
in this example, the dry water absorption T of the saturated surface of the sand based on the dry sand1As calculated by the following formula,
in this embodiment, the pretreatment vessel may be an enamel plate or the like.
In this embodiment, the following principle is adopted for determining the saturated surface dryness state of the sand: under the conditions of constant temperature and humidity, the water evaporation rate of the sand in the water-saturated state is mainly influenced by the specific surface area of particles, the surface water content, the pore structure of the particles and the surface structure, the water loss process is divided into a surface water loss stage and a pore water loss stage, for a certain amount of water-saturated sand, the specific surface area is unchanged, the water evaporation rate is basically constant in the surface water loss stage, when the sand reaches the saturated surface dry state, the water evaporation of the sand is influenced by capillary action, the evaporation speed can be obviously reduced, and namely the saturated surface dry state of the sand is determined by utilizing the change point of the water evaporation rate of the sand.
Through adopting the utility model discloses an above-mentioned technical scheme has obtained following profitable effect:
the utility model provides a grit aggregate saturated surface dry water absorption rate survey device, survey device can accurately confirm the grit saturated surface dry state, and degree of automation is high, does not receive operating personnel to influence, and the test result accuracy is high.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (4)
1. A grit aggregate saturated surface dry water absorption rate survey device which characterized in that: the measuring device comprises a temperature and humidity control box, an automatic acquisition and recording device, an upper computer, an electronic balance and a sample tray; the temperature and humidity control box top is provided with the inside and external through-hole of intercommunication, the sample dish through the stay cord with electronic balance links to each other, the stay cord passes the through-hole will the sample dish is hung inside the temperature and humidity control box, electronic balance with automatic acquisition recorder, automatic acquisition recorder with the host computer links to each other.
2. The sandstone aggregate saturated surface dry water absorption measurement device of claim 1, wherein: the bottom of the electronic balance is provided with a hook, and one end of the pull rope, which is far away from the sample disc, is connected with the hook.
3. The sandstone aggregate saturated surface dry water absorption measurement device of claim 2, wherein: the measuring range of the electronic balance is not less than 5.0kg, and the precision of the electronic balance is not less than 0.01 g.
4. The sandstone aggregate saturated surface dry water absorption measurement device of claim 3, wherein: the distance between the pull rope and the circumferential wall of the through hole is a certain distance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922032519.9U CN211602783U (en) | 2019-11-21 | 2019-11-21 | Grit aggregate saturated surface dry water absorption rate survey device |
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| CN201922032519.9U CN211602783U (en) | 2019-11-21 | 2019-11-21 | Grit aggregate saturated surface dry water absorption rate survey device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697635A (en) * | 2021-03-25 | 2021-04-23 | 北京新桥技术发展有限公司 | Method and system for testing water absorption of regenerated coarse aggregate |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112697635A (en) * | 2021-03-25 | 2021-04-23 | 北京新桥技术发展有限公司 | Method and system for testing water absorption of regenerated coarse aggregate |
| CN112697635B (en) * | 2021-03-25 | 2021-09-10 | 北京新桥技术发展有限公司 | Method and system for testing water absorption of regenerated coarse aggregate |
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