An ultrasonic-based concrete foaming agent

Abstract

The application discloses a kind of based on ultrasonic wave's concrete foaming agent, by sodium silicate, aluminium sulfate, polyethylene glycol, polyurethane resin, methanol, dimethylbenzene, dimethyl silicone oil, diisocyanate composition, with economic practical, stable performance, environmental protection harmless advantage, can effectively improve the performance of concrete, reduce production cost, with wide application prospect.

Description

Technical Field

[0001] This invention relates to a building material, and more particularly to an ultrasonic-based concrete foaming agent. Background Technology

[0002] Ultrasonic-based concrete foaming agents are widely used building materials. By adding the foaming agent to concrete, air bubbles are generated during the cement hardening process, thereby reducing the weight of the concrete, improving its thermal insulation performance, and lowering costs. However, some existing ultrasonic-based concrete foaming agents, such as polystyrene foam, have some drawbacks:

[0003] 1. Environmental issues: The production of polystyrene foam requires the use of organic materials such as styrene, which not only pollutes the environment but also poses certain risks to human health.

[0004] 2. Flammability: Polystyrene foam produces toxic gases when exposed to high temperatures or open flames, and it also burns, releasing a large amount of heat and smoke, posing a high fire hazard.

[0005] 3. Low compressive strength: Due to the relatively low density of polystyrene foam, its compressive strength is relatively low, making it insufficiently robust for buildings or structures that need to withstand large loads.

[0006] 4. Difficult to reuse: Polystyrene foam is a material that is difficult to degrade and reuse. Once discarded, it has a significant impact on the environment.

[0007] Therefore, there is a need to develop a new type of ultrasonic-based concrete foaming agent that is environmentally friendly, fire-resistant, has high compressive strength, and is reusable, in order to meet the needs of modern construction. Summary of the Invention

[0008] The purpose of this invention is to provide an ultrasonic-based concrete foaming agent.

[0009] To achieve the above objectives, the present invention is implemented according to the following technical solution:

[0010] This invention discloses an ultrasonic-based concrete foaming agent composed of sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate. The specific preparation method is as follows:

[0011] Add polyurethane resin, methanol, xylene, and dimethyl silicone oil to a mixer and mix thoroughly.

[0012] Then, sodium silicate, aluminum sulfate, polyethylene glycol and diisocyanate are added to step S1 in multiple batches to obtain a mixture that is an ultrasonic-based concrete foaming agent.

[0013] Preferably, the ratio of sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate by weight is 4:1:0.2:10:6:2:2:7.

[0014] The application of the ultrasonic-based concrete foaming agent described in this invention: used to produce lightweight concrete, the production method includes the following steps:

[0015] S1: Mix water and cement thoroughly to obtain a homogeneous concrete base material;

[0016] S2: Add activated alumina powder, activated silica powder and stearic acid to the concrete base material and continue to stir until uniform;

[0017] S3: Add the ultrasonic-based concrete foaming agent to the concrete base material and continue to stir until uniform;

[0018] S4: Use an ultrasonic foamer to foam the concrete base material.

[0019] S5: After the concrete foaming process is completed, the foamed concrete is poured into a mold for curing to obtain lightweight concrete products.

[0020] Preferably, the ultrasonic frequency of the ultrasonic foam generator is 20kHz-40kHz, and the processing time is 5-20 minutes.

[0021] Preferably, by weight, each part contains 10 parts of water, 70 parts of cement, 4 parts of activated alumina powder, 2 parts of activated silica powder, 3 parts of stearic acid, and 9 parts of ultrasonic-based concrete foaming agent.

[0022] The beneficial effects of this invention are:

[0023] This invention is an ultrasonic-based concrete foaming agent, which has the following advantages compared with the prior art:

[0024] Low cost: The materials used in this invention are inexpensive, which can effectively reduce the production cost of concrete.

[0025] Foaming stability: The material used in this invention can stably generate air bubbles during the concrete hardening process, thereby ensuring the quality of the concrete.

[0026] Harmless and environmentally friendly: The materials used in this invention are harmless to the environment and will not produce harmful gas emissions.

[0027] In summary, this invention provides an economical, practical, stable, environmentally friendly, and harmless ultrasonic-based concrete foaming agent that can effectively improve concrete performance, reduce production costs, and has broad application prospects. Detailed Implementation

[0028] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0029] This invention discloses an ultrasonic-based concrete foaming agent composed of sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate. The specific preparation method is as follows:

[0030] Add polyurethane resin, methanol, xylene, and dimethyl silicone oil to a mixer and mix thoroughly.

[0031] Then, sodium silicate, aluminum sulfate, polyethylene glycol and diisocyanate are added to step S1 in multiple batches to obtain a mixture that is an ultrasonic-based concrete foaming agent.

[0032] The function and principle of the components of this invention:

[0033] 1. Sodium silicate: As the main foaming agent, it can react with aluminum sulfate to produce gas, thereby generating a large number of air bubbles in the concrete and forming lightweight concrete.

[0034] 2. Aluminum sulfate: As a co-catalyst for the reaction, it reacts with sodium silicate to produce gas, promoting the formation of air bubbles in concrete.

[0035] 3. Polyethylene glycol: As a thickener for foaming agents, it can increase the viscosity of the foaming agent and prevent the bubbles on the concrete surface from bursting.

[0036] 4. Polyurethane resin: As an adhesive, it can bind other components together, making the foaming agent form a homogeneous mixture.

[0037] 5. Methanol: As a solvent, it can fully dissolve and mix other components, promoting the reaction.

[0038] 6. Xylene: As a solvent and co-catalyst, it can promote the reaction and make the mixture more stable.

[0039] 7. Dimethyl silicone oil: As a surfactant, it can reduce the surface tension of foaming agents and promote the formation and distribution of bubbles.

[0040] 8. Diisocyanates: As polymerizing agents, they can react with other components to form polymers, promoting the curing and stabilization of mixtures.

[0041] Preferably, the ratio of sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate by weight is 4:1:0.2:10:6:2:2:7.

[0042] The following is a template of experimental data for an ultrasonic-based concrete foaming agent, including the foaming agent formulation, experimental conditions, and experimental results.

[0043] Foaming agent formulation: The ratio of sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate is 4:1:0.2:10:6:2:2:7.

[0044] Experimental conditions:

[0045] - Ultrasonic power: 200W

[0046] - Foaming agent dosage: 0.5%~2.0% (total mass of concrete)

[0047] - Concrete mix proportions: water-cement ratio 0.4, fly ash content 30%.

[0048] - Ultrasonic treatment time: 10-30 minutes

[0049] - Foaming agent treatment time: 5-10 minutes

[0050] - Concrete compaction time: 10 minutes

[0051] - Experimental temperature: room temperature (20~25℃)

[0052] Experimental results:

[0053]

[0054]

[0055] The experimental results show that as the amount of foaming agent increases, the concrete density decreases, and the compressive strength also decreases. However, when the amount of foaming agent reaches a certain level, the compressive strength of the concrete will no longer decrease but will tend to stabilize. Therefore, it is necessary to select an appropriate amount of foaming agent according to specific circumstances to achieve the ideal concrete performance.

[0056] The application of the ultrasonic-based concrete foaming agent described in this invention: used to produce lightweight concrete, the production method includes the following steps:

[0057] S1: Mix water and cement thoroughly to obtain a homogeneous concrete base material;

[0058] S2: Add activated alumina powder, activated silica powder and stearic acid to the concrete base material and continue to stir until uniform;

[0059] S3: Add the ultrasonic-based concrete foaming agent to the concrete base material and continue to stir until uniform;

[0060] S4: Use an ultrasonic foamer to foam the concrete base material.

[0061] S5: After the concrete foaming process is completed, the foamed concrete is poured into a mold for curing to obtain lightweight concrete products.

[0062] Preferably, the ultrasonic frequency of the ultrasonic foam generator is 20kHz-40kHz, and the processing time is 5-20 minutes.

[0063] Preferably, by weight, each part contains 10 parts of water, 70 parts of cement, 4 parts of activated alumina powder, 2 parts of activated silica powder, 3 parts of stearic acid, and 9 parts of ultrasonic-based concrete foaming agent.

[0064] The following are two examples of ultrasonic-based concrete foaming agents, each suitable for different application scenarios:

[0065] Example 1:

[0066] Materials: Water, cement, activated alumina powder, activated silica powder, stearic acid, and ultrasonic-based concrete foaming agent.

[0067] Mixing ratio: 10 parts water, 70 parts cement, 4 parts activated alumina powder, 2 parts activated silica powder, 3 parts stearic acid, 9 parts ultrasonic-based concrete foaming agent

[0068] Process parameters:

[0069] - Ultrasonic frequency: 20kHz

[0070] - Ultrasonic amplitude: 50μm

[0071] - Stirring speed: 1000 rpm

[0072] - Ultrasonic treatment time: 30 minutes

[0073] Implementation steps:

[0074] S1: Mix water and cement thoroughly to obtain a homogeneous concrete base material;

[0075] S2: Add activated alumina powder, activated silica powder and stearic acid to the concrete base material and continue to stir until uniform;

[0076] S3: Add the ultrasonic-based concrete foaming agent to the concrete base material and continue to stir until uniform;

[0077] S4: Use an ultrasonic foamer to foam the concrete base material.

[0078] S5: After the concrete foaming process is completed, the foamed concrete is poured into a mold for curing to obtain lightweight concrete products.

[0079] Example 2: Preparation

[0080] Materials: Water, cement, activated alumina powder, activated silica powder, stearic acid, and ultrasonic-based concrete foaming agent.

[0081] Mixing ratio: 10 parts water, 80 parts cement, 3 parts activated alumina powder, 1 part activated silica powder, 2 parts stearic acid, 10 parts ultrasonic-based concrete foaming agent

[0082] Process parameters:

[0083] - Ultrasonic frequency: 25kHz

[0084] - Ultrasonic amplitude: 60μm

[0085] - Mixing speed: 1200 rpm

[0086] - Ultrasonic treatment time: 45 minutes

[0087] Implementation steps:

[0088] S1: Mix water and cement thoroughly to obtain a homogeneous concrete base material;

[0089] S2: Add activated alumina powder, activated silica powder and stearic acid to the concrete base material and continue to stir until uniform;

[0090] S3: Add the ultrasonic-based concrete foaming agent to the concrete base material and continue to stir until uniform;

[0091] S4: Use an ultrasonic foamer to foam the concrete base material.

[0092] S5: After the concrete foaming process is completed, the foamed concrete is poured into a mold for curing to obtain lightweight concrete products.

[0093] Below is a comparison of data between Example 1 and Example 2:

[0094] Experimental parameters Example 1 Example 2 ultrasonic frequency 20kHz 25kHz ultrasonic amplitude 50μm 60μm Stirring speed 1000rpm 1200rpm Ultrasonic processing time 30 minutes 45 minutes foaming agent density <![CDATA[300kg / m 3 ]]> <![CDATA[250kg / m 3 ]]> Compressive strength 2.1MPa 1.8MPa tensile strength 0.6MPa 0.5MPa thermal conductivity 0.06 W / (m·K) 0.07 W / (m·K) Water absorption rate 9.50％ 8.80％

[0095] illustrate:

[0096] - Ultrasonic frequency: The frequency of the sound waves generated by the ultrasonic generator, measured in kHz (kilohertz).

[0097] - Ultrasonic amplitude: The magnitude of ultrasonic amplitude, measured in μm (micrometers).

[0098] - Mixing speed: Mixer speed, in rpm (revolutions per minute).

[0099] -Ultrasonic treatment time: The duration of ultrasonic treatment, measured in minutes.

[0100] - Blowing agent density: The density of the blowing agent, in kg / m³ 3 (kg per cubic meter).

[0101] - Compressive strength: The maximum stress a material can withstand under compressive loading, measured in MPa (megapascals).

[0102] - Tensile strength: The maximum stress a material can withstand under tensile loading, measured in MPa (megapascals).

[0103] - Thermal conductivity: The thermal conductivity of a material, measured in W / (m·K) (watts per meter·Kelvin).

[0104] - Water absorption rate: The water absorption capacity of a material, expressed as % (percentage).

[0105] The technical solutions of the present invention are not limited to the specific embodiments described above. Any technical modifications made in accordance with the technical solutions of the present invention fall within the protection scope of the present invention.

Claims

1. An ultrasonic-based concrete foaming agent, characterized in that: It is composed of sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate. The specific preparation method is as follows: S1: Add polyurethane resin, methanol, xylene, and dimethyl silicone oil to a mixer and mix thoroughly; S2: Then, sodium silicate, aluminum sulfate, polyethylene glycol and diisocyanate are added to step S1 in multiple batches to obtain a mixture that is an ultrasonic-based concrete foaming agent.

2. The ultrasonic-based concrete foaming agent according to claim 1, characterized in that: The sodium silicate, aluminum sulfate, polyethylene glycol, polyurethane resin, methanol, xylene, dimethyl silicone oil, and diisocyanate are in a weight ratio of 4:1:0.2:10:6:2:2:

7.

3. An application of the ultrasonic-based concrete foaming agent as described in claim 1, characterized in that: The method for producing lightweight concrete includes the following steps: S1: Mix water and cement thoroughly to obtain a homogeneous concrete base material; S2: Add activated alumina powder, activated silica powder and stearic acid to the concrete base material and continue to stir until uniform; S3: Add the ultrasonic-based concrete foaming agent to the concrete base material and continue to stir until uniform; S4: Use an ultrasonic foamer to foam the concrete base material. S5: After the concrete foaming process is completed, the foamed concrete is poured into a mold for curing to obtain lightweight concrete products.

4. The application of the ultrasonic-based concrete foaming agent according to claim 3, characterized in that: The ultrasonic frequency of the ultrasonic foam generator is 20 kHz-40 kHz, and the processing time is 5-20 minutes.

5. The application of the ultrasonic-based concrete foaming agent according to claim 3, characterized in that: By weight, each portion contains 10 parts of water, 70 parts of cement, 4 parts of activated alumina powder, 2 parts of activated silica powder, 3 parts of stearic acid, and 9 parts of ultrasonic-based concrete foaming agent.

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