Composite reinforcing agent, preparation method and application thereof, and preparation method of recycled concrete pavement brick

A technology of recycled concrete and composite reinforcement, which is applied to pavement, roads, roads and other directions paved with prefabricated blocks, can solve the problems of poor strength and stability of pavement bricks, and achieve the effect of reducing water-binder ratio, maintaining stability and improving strength

CN114195422AActive Publication Date: 2022-03-18SHENZHEN HUAWEI ENVIRONMENTAL PROTECTION BUILDINGMATERIAL
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2022-03-18

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Abstract

The invention provides a composite reinforcing agent, a preparation method and application thereof, and a preparation method of a recycled concrete pavement brick, and relates to the technical field of building materials. The composite reinforcing agent provided by the invention is prepared from the following raw materials in parts by weight: 15-22 parts of an anionic surfactant, 7-14 parts of a nonionic surfactant, 3-5 parts of a stabilizer and 59-75 parts of water. The composite reinforcing agent provided by the invention adopts an anionic and nonionic surfactant compounded system, and is added into the recycled concrete pavement brick, so that the surface tension of a cement adhesive material and recycled aggregate can be reduced, the water-adhesive ratio of the pavement brick can be reduced, and when the pavement brick is subjected to vibration compression molding, the brick body can be denser due to the lubricating effect of the composite reinforcing agent; furthermore, the strength of the brick is improved, and forming and demolding of the pavement brick are facilitated. When the composite reinforcing agent is used for preparing the pavement brick, the strength and the quality stability of the pavement brick can be obviously improved under the condition of the same cement dosage.
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Description

technical field

[0001] The invention relates to the technical field of building materials, in particular to a composite reinforcing agent, a preparation method and application thereof, and a preparation method of recycled concrete pavement bricks. Background technique

[0002] Construction waste is a product that cannot be ignored in the process of national economic development and urbanization. The disposal methods of construction waste such as dumping or landfill will cause serious environmental problems and waste of resources, and will seriously affect the sustainable development of the country. How to better deal with and recycle the huge amount of construction waste is a more important task at this stage. Among them, crushing construction waste into recycled aggregates of different particle sizes, and using recycled aggregates with small and medium particle sizes to prepare recycled concrete pavement bricks is a more effective method for resource utilization of construc...

Examples

preparation example Construction

[0031] The present invention also provides a preparation method for the composite reinforcing agent described in the above technical solution, comprising the following steps:

[0032] Mix anionic surfactant, nonionic surfactant, stabilizer and water to obtain composite reinforcing agent.

[0033] In the present invention, the mixing temperature is preferably 50° C., the mixing is preferably carried out under stirring conditions, and the stirring speed is preferably 300 r / min. In the present invention, the order of addition during the mixing is preferably: add anionic surfactant, nonionic surfactant and stabilizer in water in sequence.

[0034] In a specific embodiment of the present invention, the preparation method of the composite reinforcing agent is: add water to the container, control the homogenizer speed to 300r / min, heat the water bath to 50°C, add sodium dodecylbenzenesulfonate , stirred until completely dissolved, and then sequentially added fatty alcohol polyoxyeth...

Embodiment 1

[0053] The composite reinforcing agent provided in this embodiment is composed of the following preparation raw materials in parts by weight: 12 parts of sodium dodecylbenzenesulfonate, 8 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 8 parts of fatty alcohol polyoxyethylene ether, coconut 4 parts of oleic acid diethanolamide, 5 parts of lauryl amidopropyl betaine, 63 parts of deionized water.

[0054] Add water into the container, control the speed of the homogenizer to 300r / min, heat in a water bath to 50°C, add sodium dodecylbenzenesulfonate, stir until completely dissolved, then add fatty alcohol polyoxyethylene ether sodium sulfate, Fatty alcohol polyoxyethylene ether, coconut oil fatty acid diethanolamide and lauryl amidopropyl betaine are homogenized and then cooled to obtain a composite reinforcing agent.

Embodiment 2

[0073] The composite reinforcing agent provided in this embodiment is composed of the following preparation raw materials in parts by weight: 10 parts of sodium dodecylbenzenesulfonate, 10 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 10 parts of fatty alcohol polyoxyethylene ether, coconut 2 parts of oleic acid diethanolamide, 3 parts of cocamidopropyl betaine, 65 parts of deionized water.

[0074] Add water into the container, control the speed of the homogenizer to 300r / min, heat in a water bath to 50°C, add sodium dodecylbenzenesulfonate, stir until completely dissolved, then add fatty alcohol polyoxyethylene ether sodium sulfate, Fatty alcohol polyoxyethylene ether, coconut oil fatty acid diethanolamide and cocamidopropyl betaine are homogenized and then cooled to obtain a composite reinforcing agent.