CN210071585U - Emulsified asphalt demulsification speed and demulsification rate testing device - Google Patents

Emulsified asphalt demulsification speed and demulsification rate testing device Download PDF

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Publication number
CN210071585U
CN210071585U CN201920760224.0U CN201920760224U CN210071585U CN 210071585 U CN210071585 U CN 210071585U CN 201920760224 U CN201920760224 U CN 201920760224U CN 210071585 U CN210071585 U CN 210071585U
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base
demulsification
mixing
controller
emulsified asphalt
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Inventor
张鹏
汪宏杰
陈海鹏
栗振永
唐强
刘德涛
胡占荣
黄浩斌
魏子椋
赵凤宇
张燕
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China Railway Tunnel Group Co Ltd CRTG
CRTG Road and Bridge Engineering Co Ltd
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China Railway Tunnel Group Co Ltd CRTG
CRTG Road and Bridge Engineering Co Ltd
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Abstract

The utility model provides an emulsified asphalt breakdown of emulsion speed and breakdown of emulsion rate testing arrangement for solve and judge at present that emulsified asphalt breakdown of emulsion speed receives the big problem of subjectivity influence. The utility model comprises an environment box, wherein a first base and a second base are fixed at the bottom of the environment box, a liquid container is arranged on the second base, a mixing pot is arranged on the first base, a heating device is fixed at the lower part of the mixing pot, and the heating device is arranged at the upper part of the first base; the upper part of the environment box is provided with a wedge-shaped plate, and the lowest position of the wedge-shaped plate is arranged right above the liquid container; all be equipped with pressure sensor on first base and the second base, heating device and two pressure sensor are connected with the controller, and the controller is connected with the display screen. The utility model discloses can realize the breakdown of emulsion effect of quantitative analysis emulsion, make the test result no longer influenced by test operator's subjectivity, the test result is more accurate credible, has more persuasion.

Description

Emulsified asphalt demulsification speed and demulsification rate testing device
Technical Field
The utility model relates to a road engineering's technical field especially relates to an emulsified asphalt breakdown of emulsion speed and breakdown of emulsion rate testing arrangement for the detection of emulsified asphalt breakdown of emulsion process in the road construction process.
Background
The emulsified asphalt mixture has been widely used in road engineering because of its advantages of low carbon, energy saving, environmental protection, huge usage space, excellent cost performance, etc.
Asphalt is originally a sticky cohesive substance, and the demulsification is that the asphalt is separated from emulsion to make particles aggregate with each other, so as to form a thin layer covering on aggregates and road surfaces. The problem of demulsification control is an important problem in the use process of the emulsified asphalt cold-mix mixture.
The demulsification of the emulsified asphalt is influenced by both internal and external factors. The internal factor is the chemical structure of the emulsifier, and the external environmental temperature, pH value and humidity can obviously influence the demulsification of the emulsified asphalt. The external aggregate mixture also has obvious influence on the demulsification process of the emulsified asphalt.
At present, the demulsification speed of the emulsion is judged mainly according to the test specification of road engineering asphalt and asphalt mixture (JTGE 20-2011) T0685-1993, wherein after the emulsion is mixed with graded mineral aggregate, the uniform condition that the surface of the mineral aggregate is wrapped by an emulsion film is adopted in the specification. The method has the defects that the demulsification test result of the emulsified asphalt is highly subjective by test operators, and different test operators may generate different test conclusions. The test can only be qualitatively analyzed, cannot give quantitative test results, and has no uniform index for evaluating the demulsification speed and the demulsification rate of the emulsified asphalt.
SUMMERY OF THE UTILITY MODEL
To judging emulsified asphalt breakdown of emulsion speed at present and receiving the big technical problem of subjectivity influence, the utility model provides an emulsified asphalt breakdown of emulsion speed and breakdown of emulsion rate testing arrangement utilizes the wedge to collect the moisture of mixing pot evaporation, and the quality of moisture and mixing pot when collecting all can not take place again and change the standard of accomplishing as the breakdown of emulsion, can be used for evaluating emulsified asphalt breakdown of emulsion process, can carry out quantitative analysis to the breakdown of emulsion effect of emulsion.
In order to achieve the above purpose, the technical solution of the present invention is realized as follows: the utility model provides an emulsified asphalt demulsification speed and demulsification rate testing arrangement, includes the environment case, and the bottom of environment case is fixed with first base and second base, be equipped with flourishing liquid household utensils on the second base, be equipped with the blending pot on the first base, the lower part of blending pot is fixed with heating device, and heating device sets up the upper portion at first base. The upper part of the environment box is provided with a wedge-shaped plate, and the lowest position of the wedge-shaped plate is arranged right above the liquid container; all be equipped with pressure sensor on first base and the second base, heating device and two pressure sensor are connected with the controller, and the controller is connected with the display screen.
The mixing pot is internally provided with mixing blades which are connected with a rotating motor, and the rotating motor is connected with a controller.
The rotating motor is fixed on the electric telescopic rod, the electric telescopic rod is connected with the controller, and the upper portion of the electric telescopic rod is fixed on the environment box.
The environment box is characterized in that a stand column is fixed to the outer portion of the environment box, a vertical rod is fixed to the stand column, the lower portion of the vertical rod is fixed to the upper portion of the environment box, and the bottom of the vertical rod is fixedly connected with an electric telescopic rod.
And a rotating speed sensor is arranged on the mixing blade and is connected with a controller.
The side part of the mixing pot is provided with a rotating shaft which is movably arranged at one side of the environment box, and the end part of the rotating shaft is fixedly provided with a mixing handle which is connected with the controller.
The environment box is also internally provided with a humidity control device, a refrigerating device and a heating device which are all connected with the controller.
The utility model has the advantages that: the method overcomes the defects of the existing test method or device, so that the test result is not influenced by the subjectivity of a test operator any more, the emulsion breaking effect of the emulsion can be quantitatively analyzed, and the test result is more accurate, credible and persuasive. The utility model discloses can be through changing emulsifier self characteristic (emulsifier kind, quantity and PH etc.), the temperature in characteristic (gradation, the type of gathering materials) and the environment box of gathering materials, humidity, the stirring intensity of stirring the pot, the churning time, probe emulsion self characteristic (emulsifier kind, quantity and PH etc.), the characteristic of gathering materials (gradation, the type of gathering materials), and external environmental factor (temperature, humidity, stirring intensity and churning time etc.) to the influence of emulsion breakdown effect, set up different operating modes, the influence of the different factors of quantitative analysis to emulsion breakdown of emulsion process, provide data support for practical engineering application.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic block diagram of the present invention.
In the figure, 1 is an environment box, 2 is a first base, 3 is a heating device, 4 is a second base, 5 is a mixing pot, 6 is a mixing blade, 7 is a liquid container, 8 is a humidity control device, 9 is a refrigerating device, 10 is a heating device, 11 is a column, 12 is a supporting rod, 13 is an electric telescopic rod, 14 is a wedge-shaped plate, 15 is a controller, 16 is a mixing handle, and 17 is a fixing block.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.
As shown in figures 1 and 2, the device for testing the demulsification speed and the demulsification rate of the emulsified asphalt comprises an environment box 1, wherein a first base 2 and a second base 4 are fixed at the bottom of the environment box 1, and the first base 2 and the second base 4 are independent of each other. Be equipped with flourishing liquid household utensils 7 on the second base 4, flourishing liquid household utensils 7 are used for flourishing the moisture that the emulsification in-process produced, are equipped with on the first base 2 and mix pot 5, and mix pot 5 is used for heating and stirring mineral aggregate and emulsion, and the lower part of mixing pot 5 is fixed with heating device 3, and heating device 3 is confined, and its quality is also definite unchangeable, carries out stable heating to mix pot bottom, guarantees the stability of emulsification in-process temperature to carry out stable emulsification to the mineral aggregate. The heating device 3 is disposed on the upper portion of the first susceptor 2, and the heating device 3 is fixed to the first susceptor 2. The upper portion of environment case 1 is equipped with wedge plate 14, and wedge plate 14 is the upper cover of environment case 1, and the lowest position of wedge plate 14 sets up directly over flourishing liquid household utensils 7. The first base 2 is positioned at the side part of the environment box 1, the second base 4 is positioned at the middle part of the other side of the environment box 1, and the highest part of the wedge-shaped plate 14 is positioned right above the mixing pot 5. The wedge-shaped plate 14 is not horizontal, namely has a certain inclination angle with the horizontal direction, liquid such as water falls into the liquid containing vessel 7 of the second base 4 through the wedge-shaped plate 14 on the environment box 1, and the liquid containing vessel 7 collects the liquid such as water evaporated in the emulsification process. The lowest position of the wedge-shaped plate 14 is positioned right above the central position of the second base 4, so that the wedge-shaped plate 14 can conveniently drop water and other liquid into the liquid containing vessel for collection. The device is characterized in that pressure sensors are arranged on the first base 2 and the second base 4, the pressure sensors are NS-P22 pressure sensors in the sky shower sensor and are used for measuring the mass changes of the first base 2 and the second base 4 respectively, namely the mass changes of liquid in the liquid container 7 and total aggregate in the mixing pot 5, the heating device 3 and the two pressure sensors are connected with the controller 15, the controller 15 is connected with the display screen, and the display screen is used for displaying the pressure measured by the two pressure sensors in real time.
The mixing pot 5 is internally provided with a mixing blade 6, the mixing blade 6 is connected with a rotating motor, and the rotating motor is connected with a controller 15. The rotating electrical machine is fixed on top of the environmental chamber 1.
The rotating motor is fixed on the electric telescopic rod 13, the electric telescopic rod 13 is connected with the controller 15, and the upper portion of the electric telescopic rod 13 is fixed at the top of the environment box 1. Can adjust the height of mixing leaf 6 through electric telescopic handle 13, electric telescopic handle 13 extension mixes leaf 6 and can extend and mix to gathering materials wherein in deepening mixing pot 5, does not stir accessible controller and shortens electric telescopic handle 13, makes to mix leaf 6 and leaves mixing pot 5 and unsettled on mixing pot 5's upper portion, and does not influence pouring of gathering materials in mixing pot 5.
The tail of the environment box 1 is fixed with a vertical column 11, the vertical column 11 is fixed with a vertical rod 12, the lower part of the vertical rod 12 is fixed on the upper part of the environment box 1, and the bottom of the vertical rod 12 is fixedly connected with an electric telescopic rod 13. The upright stanchion 12 is an L-shaped pole, the horizontal part of the L-shaped pole is fixedly connected with the upper part of the upright post 11 through a fixing block 17, and the lower part of the vertical part of the L-shaped pole passes through the top of the environment box 1 and is fixed on the environment box 1 through a rubber sleeve.
And a rotating speed sensor is arranged on the mixing blade 6 and is connected with a controller 15. The revolution speed sensor is a Hydrotechnik RS110-DS03 revolution speed sensor. Can real-time detection through speed sensor and mix the rotational speed of leaf 6, then the rotational speed of control rotating electrical machines can real-time adjustment mix the rotational speed of leaf 6, control stirring rate to can carry out the stirring of suitable rotational speed to mineral aggregate and emulsion.
The side part of the mixing pot 5 is provided with a rotating shaft which is movably arranged at one side of the environment box 1, the end part of the rotating shaft is fixedly provided with a mixing handle 16, and the mixing handle 16 is connected with a controller 15. The mixing handle rotates 90 degrees to convert the opening of the mixing pot 5 from the upper part to the side part, so that the aggregate can be conveniently taken out from the environment box.
Still be equipped with humidity control device 8, refrigerating plant 9 and the device 10 that heats in the environment case 1, humidity control device 8, refrigerating plant 9 and the device 10 that heats all are connected with controller 15, can adjust the temperature and humidity in the environment case 1 through humidity control device 8, refrigerating plant 9 and the device 10 that heats to reach suitable ambient temperature. The controller 15 controls the start and stop of each execution part through the driving circuit board. Different working conditions are simulated according to actual needs, and the influence of environmental factors on the emulsion breaking process is researched.
The humidity control device 8 is a steam humidifier system, adopts an external electric heating and humidifying method, and is provided with a stainless steel armored electric heater. The humidifier is controlled by PID, uses contactless equal-period pulse width-modulated SSR (solid state relay), is provided with a water level control device, and is provided with a heater for preventing dry burning. The refrigerating device 9 adopts a two-stage cascade refrigerating system, the cascade system comprises a high-pressure refrigerating cycle and a low-pressure refrigerating cycle, a connecting container of the cascade system is an evaporative condenser, and the evaporative condenser has the functions of an air-cooled coil condenser and a fin type multi-section evaporator for condensing an evaporator with the low-pressure circulation during the high-pressure circulation. The heating device 10 is a nichrome finned heater, and the embedded heating element is arranged in the interlayer of the stainless steel cavity body, so that the heating device is extremely safe, the temperature rise is fast, and the service life is long.
A test method of a device for testing the demulsification speed and the demulsification rate of emulsified asphalt comprises the following steps:
step S1: the controller 15 opens the humidity control device 8 and the heating device 10 through the driving circuit, adjusts the temperature in the environmental box 1 to 105 +/-5 ℃, and dries the interior of the environmental box for not less than 4-6 hours, so that the moisture in the environmental box 1 is dried.
Step S2: the temperature of the heating device 3 is adjusted by the controller 15 to preheat the mixing pot 5, and the mixing pot 5 is preheated to 115 +/-5 ℃; preheating to 10 deg.c higher than the mixing temperature, and raising the mixing temperature for modified asphalt.
Step S3: two groups of mineral aggregates of the group A and the group B with the same gradation and the same quality required by the test are prepared, and the mineral aggregates of the group A and the mineral aggregates of the group B are respectively placed in an oven to be heated to 120 +/-5 ℃ and heated to the temperature which is about 15 ℃ above the mixing temperature. And respectively measuring the specific surface area s of the group A mineral aggregate and the group B mineral aggregate by adopting a specific surface area testing instrumentam2G and sbm2(g) respectively measuring the mass m of the group A mineral aggregate and the group B mineral aggregate by using a balance1ag and m1bg. The group A mineral aggregate and the group B mineral aggregate are two identical mineral aggregates, the components of the mineral aggregate particles used by the group A mineral aggregate and the group B mineral aggregate are shown in Table 1, the mass is 200g,
TABLE 1 composition ratio (%)
Figure 273277DEST_PATH_IMAGE001
Step S4: adjusting the temperature in the mixing pot 5 and the environment temperature in the environment box 1 to be the mixing temperature of the group A mineral aggregates; adding the group A of mineral materials into a mixing pot 5, and controlling an electric telescopic rod 13 to extend by a controller 15 so that a mixing blade 6 extends into the mixing pot 5 to add the group A of mineral materials into the mixing pot for uniform mixing; simultaneously injecting emulsion into the mixing pot 5, and controlling the rotation of the rotating motor to enable the mixing blade 6 to stir the group A mineral aggregate and the emulsion; the rotation speed of the stirring blades is 70-80r/min, and the stirring temperature and the ambient temperature are both controlled to be 105 +/-5 ℃.
Step S5: the pressure sensors on the first base 2 and the second base 4 are used for monitoring the pressure on the pressure sensors and transmitting the pressure to the display screen; the first base 2 measures the mass of mineral material, emulsion and added water in the mixing kettle, and the second base 4 measures the mass of water collected by the wedge-shaped plate 14. When no liquid is gathered and dropped on the wedge-shaped plate 14 and the pressure detected by the pressure sensors on the first base 2 and the second base 4 is not changed any more, demulsification is finished; the mixing leaves 6 continue to mix for 5min, and the mixing is finished; and measuring the quality of the water on the mixing pot and the second base 4, and if the readings on the mixing pot and the second base are not changed any more, indicating that the demulsification process in the mixing pot is finished and mainly used for judging that the group A mineral aggregate is completely demulsified.
Step S6: the controller 15 controls the electric telescopic rod to retract to enable the mixing blade 6 to leave the mixing pot 5, the controller 15 opens the mixing handle 16 to enable the mixing pot to rotate 90 degrees, aggregate of the group A of mineral materials in the mixing pot is poured out, the aggregate of the group A of mineral materials is weighed by the balance, and the mass of the aggregate is recorded as m2ag; an external balance is adopted for weighing, a stirring pot and stirring leaves can have a small amount of aggregate, and the method belongs to the normal error of the test.
Step S7: adjusting the temperature in the mixing pot 5 and the environment temperature in the environment box 1 to be the mixing temperature of the group B mineral aggregates; and setting the ambient temperature and humidity of the mineral aggregate in the group B, and the mixing speed and the mixing temperature of the mixing pot according to actual requirements. Adding the group B of mineral materials into a mixing pot 5, and controlling the electric telescopic rod 13 to extend by the controller 15 so that the mixing blade 6 extends into the mixing pot 5 to add the group B of mineral materials into the mixing pot for uniform mixing; simultaneously injecting emulsion into the mixing pot 5, and controlling the rotation of the rotating motor to enable the mixing blade 6 to stir the group B mineral aggregate and the emulsion; the rotation speed of the stirring blades can be set according to the actual working condition requirements. When no liquid is gathered and dropped on the wedge-shaped plate 14, the controller controls the rotating motor to stop stirring the stirring blade 6, the timer is utilized to measure the stirring time t of the group B of mineral materials and the emulsion, at the moment, the group B of mineral materials and the emulsion are not completely emulsified, the controller 15 controls the electric telescopic rod to retract to enable the stirring blade 6 to leave the stirring pot 5, and the controller 15 opens the stirring handle 16 to enable the stirring pot to rotate 90 degreesPouring out the aggregate of the group B of mineral materials in the mixing pot, weighing the aggregate of the group B of mineral materials by using a balance, and recording the mass as m2bg. The B group is a measurement test, does not need to reach a complete emulsification state, and is mainly used for calculating the demulsification rate and the demulsification rate under different conditions.
Step S8: calculating the demulsification rate according to a formula as follows:
Figure DEST_PATH_IMAGE002
the demulsification rate is as follows:
Figure 193960DEST_PATH_IMAGE003
wherein m is1aThe mass of the group A mineral aggregates; m is1bThe mass of the mineral aggregate in group B; saThe specific surface area of the mineral aggregate in the group A; m is2aThe total mass of the group A mineral aggregate and the coated asphalt thereof; m is2bThe total mass of the group B mineral aggregate and the coated asphalt thereof; sbThe specific surface area of the mineral aggregate in the group B; t is the mixing time.
When the group A mineral aggregate and the group B mineral aggregate are modified asphalt, the heating temperature of the heating device 3 at the lower part of the mixing pot 5 is increased; when the group A mineral aggregate and the group B mineral aggregate are both cationic emulsified asphalt, before the emulsion is added into the mixing pot 5 in the step S4, distilled water with a certain volume V is measured by a beaker and is injected into the mixing pot, and the emulsion is injected into the group A mineral aggregate after the mixture is uniformly stirred by the mixing blade 6; before the emulsion is added to the mixing pot 5 in step S7, distilled water of the same volume V is measured by a beaker and added to the mixing pot, and the mixture is stirred uniformly by the mixing blade 6 and then the emulsion is injected to mix the group B mineral aggregates. If the mineral aggregate in group A and the mineral aggregate in group B are anionic emulsified asphalt, directly injecting the emulsion for mixing.
Utilize the utility model discloses the testing arrangement of emulsified asphalt breakdown of emulsion speed and breakdown of emulsion rate proposes and adopts breakdown of emulsion speed and breakdown of emulsion rate evaluation index. The self characteristics of the emulsifier are changed by changing the type of the emulsifier, the dosage in the preparation process and the pH value; aggregate characteristics are varied by varying the grading curve of the aggregate as well as the type of aggregate.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. The device for testing the demulsification speed and the demulsification rate of the emulsified asphalt comprises an environment box (1), wherein a first base (2) and a second base (4) are fixed at the bottom of the environment box (1), and is characterized in that a liquid container (7) is arranged on the second base (4), a mixing pot (5) is arranged on the first base (2), a heating device (3) is fixed at the lower part of the mixing pot (5), and the heating device (3) is arranged at the upper part of the first base (2); the upper part of the environment box (1) is provided with a wedge-shaped plate (14), and the lowest position of the wedge-shaped plate (14) is arranged right above the liquid container (7); all be equipped with pressure sensor on first base (2) and second base (4), heating device (3) and two pressure sensor are connected with controller (15), and controller (15) are connected with the display screen.
2. The emulsified asphalt demulsification speed and demulsification rate testing device as claimed in claim 1, wherein a mixing blade (6) is arranged in the mixing pot (5), the mixing blade (6) is connected with a rotating motor, and the rotating motor is connected with a controller (15).
3. The emulsified asphalt demulsification speed and demulsification rate testing device as claimed in claim 2, wherein the rotating motor is fixed on an electric telescopic rod (13), the electric telescopic rod (13) is connected with the controller (15), and the upper part of the electric telescopic rod (13) is fixed on the environment box (1).
4. The emulsified asphalt demulsification speed and demulsification rate testing device as claimed in claim 1 or 3, wherein a vertical column (11) is fixed outside the environment tank (1), a vertical rod (12) is fixed on the vertical column (11), the lower part of the vertical rod (12) is fixed on the upper part of the environment tank (1), and the bottom of the vertical rod (12) is fixedly connected with an electric telescopic rod (13).
5. The emulsified asphalt demulsification speed and demulsification rate testing device as claimed in claim 2, wherein a rotating speed sensor is arranged on the mixing blade (6), and the rotating speed sensor is connected with the controller (15).
6. The emulsified asphalt demulsification speed and demulsification rate testing device as claimed in claim 1 or 5, wherein a rotating shaft is arranged on the side part of the mixing pot (5), the rotating shaft is movably arranged on one side of the environment box (1), a mixing handle (16) is fixed at the end part of the rotating shaft, and the mixing handle (16) is connected with the controller (15).
7. The emulsified asphalt demulsification speed and demulsification rate testing device as claimed in claim 1, wherein a humidity control device (8), a refrigerating device (9) and a heating device (10) are further arranged in the environment box (1), and the humidity control device (8), the refrigerating device (9) and the heating device (10) are all connected with the controller (15).
CN201920760224.0U 2019-05-24 2019-05-24 Emulsified asphalt demulsification speed and demulsification rate testing device Withdrawn - After Issue CN210071585U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108598A (en) * 2019-05-24 2019-08-09 中铁隧道局集团路桥工程有限公司 A kind of emulsified asphalt de-emulsification speed and demulsification efficiency test device and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108598A (en) * 2019-05-24 2019-08-09 中铁隧道局集团路桥工程有限公司 A kind of emulsified asphalt de-emulsification speed and demulsification efficiency test device and method
CN110108598B (en) * 2019-05-24 2024-02-02 中铁隧道局集团有限公司 Device and method for testing demulsification speed and demulsification rate of emulsified asphalt

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