Device and method for improving performance of cement concrete admixture

Abstract

The invention provides a device and a method for improving the performance of cement concrete admixtures, and the device and the method for improving the performance of the cement concrete admixtures comprise a box body, stirring blades, ultrasonic vibration rods and ultrasonic vibrators. A stirring cavity is formed in the box body, the ultrasonic vibrator is arranged on the side wall of the stirring cavity, the stirring blade is installed in the stirring cavity, and the ultrasonic vibration rod is located at the bottom end of a center shaft of the stirring blade. A liquid inlet is formed in the upper part of the box body and is connected with an additive storage tank; a liquid outlet is formed in the lower part and is connected with a concrete mixer. The invention also provides a method which is used for carrying out ultrasonic treatment on the additive through the device and comprises the steps of uniformly stirring, carrying out ultrasonic vibration treatment for 20-120 seconds and the like. The water reducing rate of the treated water reducing agent is increased, the performance of the early strength agent in a low-temperature environment is improved, and the dispersity of an additive containing a nano material is remarkably enhanced. The performance of the concrete admixture can be effectively improved without changing the components of the admixture, and the concrete admixture is compact in structure, easy to operate and suitable for various admixture and concrete production conditions and has wide industrial application value.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials and relates to a device and method for improving the performance of cement concrete admixtures. Background Art

[0002] Admixtures are an essential key component in modern cement concrete. Their dosage is small, but they are crucial to improving the performance, mechanical properties and durability of concrete mixtures. There are many types of admixtures, among which the most widely used is water reducer, followed by early strength agent, etc.

[0003] The main function of water reducers is to reduce water consumption by dispersing cement particles, thereby improving the strength and durability of concrete. However, with the continuous development of technology, water reducers have undergone iterations from ordinary water reducers, high-efficiency water reducers to high-performance water reducers. Its key performance indicators such as water reduction rate have reached a bottleneck and are difficult to further improve within the existing technical framework. In addition, under certain conditions, water reducers may have problems such as uneven dispersion or insufficient compatibility with cement, resulting in their performance not being fully utilized.

[0004] As another important admixture, early strength agent is mainly used to improve the early strength of concrete and speed up the construction progress. However, the early strength agent on the market currently has the problem of single composition and limited effect. Especially in low temperature environment or special construction conditions, its early strength effect is significantly reduced, affecting the efficiency and quality of the project.

[0005] In recent years, with the development of nanotechnology, admixtures containing nanomaterials have gradually attracted attention. This type of admixture improves the microstructure of concrete by introducing nanoparticles, thereby improving its mechanical properties and durability. However, nanomaterials have poor dispersibility in liquid admixtures and are prone to agglomeration, resulting in the inability to fully demonstrate their performance.

[0006] In summary, the current admixture technology has bottlenecks in performance improvement. Water reducers, early strength agents and admixtures containing nanomaterials all face problems such as insufficient dispersibility, poor adaptability and limited performance improvement. A new device and method are urgently needed to effectively solve these technical problems. Summary of the invention

[0007] In view of this, the object of the present invention is to solve the above-mentioned problems and provide a device and method for improving the performance of cement concrete admixtures.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] A device for improving the performance of cement concrete admixtures comprises a box body, a mixing blade, an ultrasonic vibrator and an ultrasonic vibrator; the box body contains a mixing chamber, the ultrasonic vibrator is arranged on the side wall of the mixing chamber, the mixing blade is arranged in the mixing chamber, and the ultrasonic vibrator is arranged at the bottom end of a rotating shaft at the center of the mixing blade; the upper part of the box body is provided with a liquid inlet, and the lower part is provided with a liquid outlet; the liquid inlet is connected to an admixture storage tank, and the liquid outlet is connected to a cement concrete mixer.

[0010] Furthermore, the ultrasonic vibrating rod comprises an ultrasonic generator, a transducer, a horn and a transmitting head; the ultrasonic frequency of the ultrasonic vibrating rod is 20kHz to 2MHz, and the ultrasonic power is 200W to 5000W.

[0011] Furthermore, the ultrasonic vibrator comprises an ultrasonic generator, a transducer, a metal substrate and a vibration plate body; the ultrasonic frequency of the ultrasonic vibrator is 20kHz to 2MHz, and the ultrasonic power is 200W to 5000W.

[0012] Furthermore, there are multiple ultrasonic vibrators, which are spirally distributed on both sides of the stirring chamber and are evenly spaced vertically along the stirring chamber.

[0013] Furthermore, the box body is directly made of stainless steel as the vibration plate body of the ultrasonic vibrator.

[0014] Furthermore, it also includes a controller, and the ultrasonic vibration rod and the ultrasonic vibrator are both connected to the controller and are controlled by the controller to be started individually or simultaneously.

[0015] Furthermore, the volume of the mixing chamber in the box body satisfies the amount of admixture used in a single mixing of the concrete mixer.

[0016] Furthermore, the admixture is a water reducing agent or an early strength agent or an admixture containing nano materials.

[0017] A method for improving the performance of cement concrete admixtures, using the device for improving the performance of cement concrete admixtures as described above to process the admixtures, comprising the following steps:

[0018] Step 1: Pump the liquid admixture from the storage tank into the box;

[0019] Step 2: Start the stirring blade regularly to ensure that the admixture is evenly distributed and does not settle;

[0020] Step 3: Before adding admixtures to concrete production, start the ultrasonic vibrator and ultrasonic vibrator for 20 to 120 seconds to ultrasonically treat the admixtures;

[0021] Step 4: The ultrasonically treated admixture is metered and added to the concrete mixer.

[0022] Furthermore, when the treated admixture is a water reducing agent, the water reducing rate of the liquid water reducing agent is improved; when the treated admixture is an early strength agent, the early effect of the concrete after the liquid early strength agent is added is improved; when the treated admixture contains nanomaterials, the dispersion uniformity of the nanomaterials in the admixture containing nanomaterials is improved.

[0023] The beneficial effects of the present invention are:

[0024] 1. The present invention significantly improves the dispersibility and stability of the admixture without changing the chemical composition of the admixture through the cavitation effect, mechanical effect and thermal effect of ultrasound. For example, for water reducers, the water reduction rate can be further improved; for early strength agents, the early strength effect in low temperature environments can be significantly enhanced; for admixtures containing nanomaterials, the problem of nanoparticle agglomeration can be effectively solved, and its dispersibility and microscopic effect can be significantly improved.

[0025] 2. The device of the present invention is compact in design and easy to operate. It can be seamlessly connected with existing concrete production equipment and can be quickly deployed on existing production lines without complicated modifications or additional equipment investment. The controller of the device can realize multiple modes of ultrasonic treatment to meet the personalized needs of different types of admixtures.

[0026] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0028] Figure 1 It is a schematic diagram of a device for improving the performance of cement concrete admixtures in the present invention.

[0029] Figure numerals: 1-liquid inlet; 2-box; 3-stirring blades; 4-ultrasonic vibration rod; 5-ultrasonic vibrator; 6-liquid outlet. DETAILED DESCRIPTION

[0030] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0031] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0032] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0033] See also Figure 1 , is a device for improving the performance of cement concrete admixture, comprising a box 2, a mixing blade 3, an ultrasonic vibrator 4, an ultrasonic vibrator 5 and a controller; the box 2 contains a mixing chamber, the ultrasonic vibrator 5 is installed on the side wall of the mixing chamber, the mixing blade 3 is installed in the center of the mixing chamber, and the ultrasonic vibrator 4 is installed at the bottom end of the rotating shaft in the center of the mixing blade 3; the upper part of the box 2 is provided with a liquid inlet 1, and the lower part is provided with a liquid outlet 6; the liquid inlet 1 is connected to the admixture storage tank, and the liquid outlet 6 is connected to the cement concrete mixer. The ultrasonic vibrator 4 and the ultrasonic vibrator 5 are both connected to the controller and are controlled by the controller to be started separately or simultaneously.

[0034] The ultrasonic vibrating rod 4 includes a transducer, a horn and a transmitter; the ultrasonic frequency of the ultrasonic vibrating rod is 20kHz to 2MHz, and the ultrasonic power is 200W to 5000W.

[0035] There are multiple ultrasonic vibrators 5, which are spirally distributed on both sides of the stirring chamber and are evenly spaced vertically along the stirring chamber. The ultrasonic vibrator 5 includes an ultrasonic generator, a transducer, a metal substrate and a vibration plate body; the ultrasonic frequency of the ultrasonic vibrator 5 is 20kHz to 2MHz, and the ultrasonic power is 200W to 5000W.

[0036] The admixture is a water reducing agent or an early strength agent or an admixture containing nano materials, and the volume of the stirring chamber in the box body 2 satisfies the amount of admixture used for a single stirring of the concrete mixer.

[0037] A method for improving the performance of a cement concrete admixture, using the device for improving the performance of a cement concrete admixture in this embodiment to process the admixture, comprises the following steps:

[0038] Step 1: extracting liquid admixture from the storage tank into the box 2;

[0039] Step 2: Start the stirring blade 3 at a fixed time to ensure that the admixture is evenly distributed and does not settle;

[0040] Step 3: before adding admixtures to concrete production, start the ultrasonic vibrator 5 and the ultrasonic vibrating rod for 420 to 120 seconds to perform ultrasonic treatment on the admixtures;

[0041] Step 4: The ultrasonically treated admixture is metered and added to the concrete mixer.

[0042] In this embodiment, when the treated admixture is a water reducing agent, the water reducing rate of the liquid water reducing agent is improved; when the treated admixture is an early strength agent, the early effect of the concrete after the liquid early strength agent is added is improved; when the treated admixture contains nanomaterials, the dispersion uniformity of the nanomaterials in the admixture containing nanomaterials is improved.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A device for improving the performance of cement concrete admixtures, characterized in that: It includes a box body, a stirring blade, an ultrasonic vibrator and an ultrasonic vibrator; the box body contains a stirring chamber, the ultrasonic vibrator is arranged on the side wall of the stirring chamber, the stirring blade is arranged in the stirring chamber, and the ultrasonic vibrator is arranged at the bottom end of the rotating shaft in the center of the stirring blade; the upper part of the box body is provided with a liquid inlet, and the lower part is provided with a liquid outlet; the liquid inlet is connected to an admixture storage tank, and the liquid outlet is connected to a cement concrete mixer.

2. The device for improving the performance of cement concrete admixture according to claim 1, characterized in that: The ultrasonic vibrating rod comprises an ultrasonic generator, a transducer, a horn and a transmitting head; the ultrasonic frequency of the ultrasonic vibrating rod is 20kHz-2MHz, and the ultrasonic power is 200W-5000W.

3. The device for improving the performance of cement concrete admixture according to claim 1, characterized in that: The ultrasonic vibrator comprises an ultrasonic generator, a transducer, a metal substrate and a vibration plate body; the ultrasonic frequency of the ultrasonic vibrator is 20kHz-2MHz, and the ultrasonic power is 200W-5000W.

4. The device for improving the performance of cement concrete admixture according to claim 1, characterized in that: There are a plurality of ultrasonic vibrators, which are spirally distributed on both sides of the stirring chamber and are evenly spaced vertically along the stirring chamber.

5. The device for improving the performance of cement concrete admixture according to claim 3, characterized in that: The box body is directly made of stainless steel as the vibration plate body of the ultrasonic vibrator.

6. The device for improving the performance of cement concrete admixture according to claim 1, characterized in that: It also includes a controller, and the ultrasonic vibration rod and the ultrasonic vibrator are both connected to the controller and are controlled by the controller to be started individually or simultaneously.

7. The device for improving the performance of cement concrete admixture according to claim 1, characterized in that: The volume of the mixing chamber in the box body meets the amount of admixture used for a single mixing of the concrete mixer.

8. The device for improving the performance of cement concrete admixture according to claim 1, characterized in that: The admixture is a water reducing agent or an early strength agent or an admixture containing nano materials.

9. A method for improving the performance of cement concrete admixtures, characterized in that: The device for improving the performance of cement concrete admixtures according to any one of claims 1 to 8 is used to treat the admixtures, comprising the following steps: Step 1: Pump the liquid admixture from the storage tank into the box; Step 2: Start the stirring blade regularly to ensure that the admixture is evenly distributed and does not settle; Step 3: Before adding admixtures to concrete production, start the ultrasonic vibrator or ultrasonic vibrating rod for 20 to 120 seconds to ultrasonically treat the admixtures; Step 4: The ultrasonically treated admixture is added to the concrete mixer after measurement.

10. The method for improving the performance of cement concrete admixture according to claim 9, characterized in that: When the treated admixture is a water reducing agent, the water reducing rate of the liquid water reducing agent is improved; when the treated admixture is an early strength agent, the early effect of the concrete after the liquid early strength agent is added is improved; when the treated admixture contains nanomaterials, the dispersion uniformity of the nanomaterials in the admixture containing nanomaterials is improved.

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