Volume stability testing device for steel slag powder cement mortar

Abstract

The utility model provides a device for testing the volume stability of steel slag powder cement mortar, which belongs to the technical field of testing the volume stability of steel slag powder cement mortar and comprises a boiling box, and a resistance ring is arranged in the boiling box and used for uniformly heating; the boiling box is internally divided into two parts by a steel plate for placing a test block and boiling water respectively, so that the test block is prevented from directly contacting the bottom and exfoliated substances are convenient to precipitate. The outer wall of the boiling box is connected with a water inlet pipeline and a water outlet pipeline, so that water quantity and water quality are convenient to control. And a temperature controller and a display screen are arranged outside the boiling box, so that the boiling temperature and time can be accurately controlled and displayed. The water inlet pipeline and the water outlet pipeline are provided with the water inlet valve and the water outlet valve respectively, so that water flow is convenient to control. Through the design, the operation convenience, efficiency and accuracy of the test are improved, and reliable evaluation on the volume stability of the cement mortar containing the steel slag powder is ensured.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of steel slag powder cement mortar volume stability test, specifically relates to a kind of steel slag powder cement mortar volume stability test device. BACKGROUND

[0002] With the construction of a large number of roads in China, the demand for cement mortar is increasing. In order to maximize the utilization of industrial solid waste resources, industrial waste slag is usually mixed into cement mortar, which can reduce construction cost and reduce environmental pollution. Steel slag powder may contain free calcium oxide and magnesium oxide, which can cause volume expansion during hydration. If this process is not controlled, it may cause the cement mortar to expand and deform, affecting the flatness and service life of the road structure. Especially in high humidity environments, these unstable components will react with water, making it difficult to control the volume of cement mortar. Therefore, quickly determining the volume stability can effectively evaluate the expansion risk and ensure the quality of the project. Since the cement mortar has a certain strength at this time, the stress cannot be released, which will gradually increase the tensile stress of the test block. When the tensile stress exceeds the tensile strength, it will be damaged. The twisted deformation of the cement block layer in the actual road engineering affects the overall service life of the road structure. Cement mortar is an important part of road materials and is affected by temperature and humidity changes in the natural environment. Steel slag powder may cause delayed expansion and other problems during long-term use.

[0003] The method for testing the volume stability of steel slag powder-containing cement mortar can be used to measure the degree of expansion and cracking damage of each steel slag powder-containing cement mortar block after cracking, so as to analyze the volume stability index. The currently used testing device has poor operability and low testing efficiency after weighing the steel slag powder-containing cement mortar. UTILITY MODEL CONTENTS

[0004] The utility model provides a kind of steel slag powder cement mortar volume stability test device to overcome the technical problems of the existing testing device in the prior art, which is complex in operation, low in testing efficiency and cannot quickly and accurately evaluate the expansion risk when detecting the volume stability of steel slag powder-containing cement mortar.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme,

[0006] A kind of steel slag powder cement mortar volume stability test device, including a boiling box, resistance coil is arranged in the boiling box, the boiling box is divided into two parts by steel plate, water inlet pipeline and water outlet pipeline are also connected on the outer wall of the boiling box.

[0007] A temperature controller is arranged outside the boiling box, and the temperature controller is connected with the resistance coil.

[0008] The temperature controller is connected with a display screen.

[0009] The water inlet pipeline is provided with a water inlet valve.

[0010] The water outlet pipeline is provided with a water outlet valve.

[0011] The steel plate is provided with a large pore.

[0012] The upper surface of the steel plate is fixed with a hanging basket.

[0013] The upper end of the hanging basket is connected with a weighing scale through a hook.

[0014] The weighing scale is placed on the cover.

[0015] The cover is arranged at the upper opening of the boiling box, and the shape and size of the cover are consistent with those of the upper opening of the boiling box.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The utility model discloses a kind of volume stability testing devices of steel slag powder cement mortar, through temperature controller and display screen, operating personnel can directly set and monitor boiling temperature and time, simplify the operation step, reduce the complexity of artificial operation.The combination of resistance coil and temperature controller ensures the rapid and uniform heating, improves the test efficiency.Meanwhile, the design of water inlet pipeline and water outlet pipeline makes the control of water quantity and water quality more convenient, further improves the test efficiency.The design of the large pore of steel plate and the hanging basket ensures the stability of test block and the effective separation of spall, improves the accuracy of test result.Uniform heating and stable test environment reduce test error, ensure the reliability of test result.The setting of water inlet valve and water outlet valve makes water level and water quality easy to control, further enhances the consistency of test condition, improves the repeatability and reliability of test.

[0018] Further, the boiling box is divided into two parts by steel plate, one is used for placing test block (hanging basket), and the other is used for boiling water.This design can prevent test block from directly contacting bottom, reduce the influence of uneven heat conduction, and facilitate spall to deposit to the bottom of boiling box.

[0019] Further, the boiling box is divided into two parts by steel plate, one is used for placing test block (hanging basket), and the other is used for boiling water.This design can prevent test block from directly contacting bottom, reduce the influence of uneven heat conduction, and facilitate spall to deposit to the bottom of boiling box.

[0020] Further, the boiling box is provided with temperature controller, temperature controller is connected with resistance coil, temperature controller can accurately control the heating temperature of resistance coil, ensure the temperature stability during boiling process, thereby improve the reliability and accuracy of test result.

[0021] Further, the display screen can display and set the boiling temperature and time in real time, so that the operator can intuitively monitor the test process and improve the convenience and visualization of operation.

[0022] Further, the water inlet pipeline is provided with a water inlet valve, which can control the water inlet amount, ensure that the water level in the boiling box is appropriate, and avoid that too much or too little water affects the test result.

[0023] Further, the water outlet pipeline is provided with a water outlet valve, which can control the water outlet amount, facilitate the discharge of boiled water, and also facilitate the replacement of new test water, so that the test environment is kept clean.

[0024] Further, the steel plate is provided with a large pore, which allows the peeled fragments to settle at the bottom of the boiling box through the steel plate, prevents the fragments from accumulating in the basket and affecting the accuracy of the test result.

[0025] Further, the steel plate is provided with a large pore, which allows the peeled fragments to settle at the bottom of the boiling box through the steel plate, prevents the fragments from accumulating in the basket and affecting the accuracy of the test result.

[0026] Further, the weighing meter can monitor the mass change of the test block in real time, and the hook is connected to the basket, so that the mass change before and after the test can be measured, and the test precision and efficiency are improved.

[0027] Further, the weighing meter is placed on the cover, which not only facilitates reading data, but also ensures the safety and stability of the weighing meter, and prevents it from being disturbed during the boiling process.

[0028] Further, the design of the cover ensures that the boiling box is well sealed, prevents heat and water vapor from being lost, and ensures the stability and safety of the boiling process. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 : the overall structure of the utility model is shown in the figure;

[0030] Figure 2 : the overall structure of the utility model is shown in the figure;

[0031] Figure 3 : the temperature control system of the utility model is shown in the figure;

[0032] Figure 4 : the steel plate in the device is shown in the figure;

[0033] Figure 5 : the basket structure of the device is shown in the figure.

[0034] Label description: 1, cover; 2, weighing meter; 3, basket; 4, steel plate; 5, boiling box; 6, support; 7, resistance ring; 8, temperature controller; 9, water inlet valve; 10, water inlet pipeline; 11, water outlet valve; 12, water outlet pipeline. DETAILED DESCRIPTION

[0035] In order to further understand the content of the present application, the present application will be described in detail below in combination with the drawings and specific embodiments. It should be understood that the embodiments are only used to explain the present application and not to limit it.

[0036] Referring to Figures 1 to 5 As shown in the figure, a kind of steel slag powder cement mortar volume stability testing device, comprising: boiling box 5, boiling box 5 lower end is provided with support 6, support 6 is made of a rectangular steel plate and four small steel columns, four small steel columns are vertically fixed on the four corners of rectangular steel plate respectively, boiling box 5 is cylindrical barrel structure, boiling box 5 is provided with steel plate 4 inside the diameter less than the bottom of boiling box 5 circular diameter, the surface of steel plate 4 is provided with large aperture, steel plate 4 is provided with basket 3 above, steel plate 4 divides boiling box 5 into two parts of boiling water chamber, steel plate 4 is used to support the test block of steel slag powder cement mortar in basket 3;Basket 3 is stainless steel material, the bottom of basket 3 is fixed on the upper surface of steel plate 4, to precipitate to the bottom of boiling box 5 through the aperture of steel plate 4 at the bottom of basket 3 when mortar block peels off during boiling process, weighing meter 2 is connected on the top of basket 3, the upper opening of boiling box 5 is provided with the cover 1 corresponding to the opening shape of boiling box 5, the cover 1 is provided on the weighing meter 2, the lower end of weighing meter 2 is connected with basket 3. The bottom of boiling box 5 is provided with resistance ring 7, resistance ring 7 is connected with temperature controller 8 outside boiling box 5, when working, open temperature controller 8, temperature controller 8 is connected with display screen, heating temperature and heating time are input through display screen, execute instruction is sent to temperature controller 8 from display screen, heating is carried out through temperature controller 8 control resistance ring 7, temperature controller 8, weighing meter 2 and display screen are all connected with external power supply. The outer wall of boiling box 5 is provided with slot suitable for water inlet and water outlet pipeline embedding, water inlet pipeline 10 is bonded in one slot, water outlet pipeline 12 is bonded in another slot, water inlet valve 9 is provided on water inlet pipeline 10, water outlet valve 11 is provided on water outlet pipeline 12, water inlet and outlet of boiling box 5 are controlled through water inlet valve 9 and water outlet valve 11.

[0037] The steel slag powder cement mortar volume stability testing device of the present application, the specific testing method comprises the following steps:

[0038] Step one: pour the mixed steel slag powder cement mortar into the cylindrical steel mold, vibrate and compact the steel slag cement mortar test block, after molding, in the standard curing room (temperature 20±2 ℃, relative humidity above 95%), curing for 28 days.

[0039] Step two: take the cured test block out of the standard curing room and place it in an oven for drying, with the oven set at 40°C and the drying time being 3-8 hours, and observe the drying degree to ensure that the test block is completely dry.

[0040] Step three: use the scale 2 to weigh the test block and record the initial mass Mx.

[0041] Step four: place the test block in the steel slag powder cement mortar volume stability testing device for boiling test. The specific operation is as follows:

[0042] Prepare the boiling box 5 and place it on the support 6. Place the steel plate 4 with large pores inside the boiling box 5, place the stainless steel basket 3 above the steel plate 4, and place the test block in the basket 3. Connect the basket 3 to the weighing scale 2 through the hook, and ensure that the weighing scale 2 is fixed on the cover 1 of the boiling box 5. Close the cover 1 of the boiling box 5 to ensure good sealing.

[0043] Step five: turn on the temperature controller 8, input the heating temperature and heating time through the display screen, and the temperature controller 8 receives the control instructions sent by the display screen to control the resistance coil 7 to heat, and start the boiling test. During the test, control the water inlet and outlet of the boiling box 5 through the water inlet valve 9 and the water outlet valve 11 to ensure that the water level in the boiling box 5 is appropriate and the water temperature is constant. During the test, the test block may peel off, and the peeled part will precipitate to the bottom of the boiling box 5 through the large pores of the steel plate 4.

[0044] Step six: after the test is completed, turn off the external power supply, turn off the temperature controller 8, and stop heating the resistance coil 7. Check the mass value display of the weighing scale 2 on the cover 1 of the upper part of the boiling box 5, and record the mass My of the test block after the test.

[0045] Step seven: calculate the test specimen mass loss rate ε according to the initial mass Mx of the test block and the mass My of the test block after the test. The mass loss rate of the test block before and after the test can be used to quickly measure the mass change rate of the steel slag powder cement mortar and evaluate the volume stability of the steel slag powder cement mortar.

[0046] The above examples are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above examples, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced, without departing from the spirit and scope of the present application. Any modification or equivalent replacement that does not depart from the spirit and scope of the present application should be covered within the protection scope of the claims of the present application.

Claims

1. A device for testing the volume stability of steel slag powder cement mortar, characterized in that, It includes a boiling box (5), a resistance coil (7) is installed inside the boiling box (5), the boiling box (5) is divided into two parts by a steel plate (4), and an inlet pipe (10) and an outlet pipe (12) are connected to the outer wall of the boiling box (5).

2. The volume stability testing device for steel slag powder cement mortar according to claim 1, characterized in that, A thermostat (8) is provided outside the boiling box (5), and the thermostat (8) is connected to the resistance coil (7).

3. The volume stability testing device for steel slag powder cement mortar according to claim 2, characterized in that, The temperature controller (8) is connected to a display screen.

4. The volume stability testing device for steel slag powder cement mortar according to claim 1, characterized in that, The water inlet pipe (10) is equipped with a water inlet valve (9).

5. The volume stability testing device for steel slag powder cement mortar according to claim 1, characterized in that, The water outlet pipe (12) is equipped with a water outlet valve (11).

6. The volume stability testing device for steel slag powder cement mortar according to claim 1, characterized in that, The steel plate (4) has large pores.

7. The volume stability testing device for steel slag powder cement mortar according to claim 6, characterized in that, A hanging basket (3) is fixed on the upper surface of the steel plate (4).

8. The volume stability testing device for steel slag powder cement mortar according to claim 7, characterized in that, The upper end of the suspended basket (3) is connected to the weighing scale (2) via a hook.

9. The volume stability testing device for steel slag powder cement mortar according to claim 8, characterized in that, The weighing meter (2) is placed on the cover (1).

10. The volume stability testing device for steel slag powder cement mortar according to claim 9, characterized in that, The lid (1) is located at the upper opening of the boiling box (5), and the shape and size of the lid (1) match the shape and size of the upper opening of the boiling box (5).

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