Hydrophobic recycled aggregate ecological drainage brick and preparation method thereof
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A recycled aggregate and water-repellent technology, which is applied in the field of construction waste resource treatment, can solve problems such as poor drainage effect, difficult water drainage, water accumulation in drainage bricks, etc., to improve drainage speed, water repellency, and stability Effect
Active Publication Date: 2021-06-01
深圳市宝安湾建筑废弃物循环利用有限公司
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[0004] The common drainage methods of drainage bricks on the market are to drain through splicing gaps, so that the drainage bricks have good structural strength, but because the water has to flow through the surface of the drainage bricks, it is often difficult to drain water due to the tension of the water. , the surface of the drainage brick is serious, and the drainage effect is poor.
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preparation example
[0049] The preparation method of hydrophobic nano silicon dioxide:
[0050] Add 1kg of nano-silica, 0.09kg of γ-aminopropyltriethoxysilane and 6kg of ethanol into the reaction kettle, mix and stir at 60°C for 2h, filter to obtain a solid after stirring, and dry the obtained solid in an oven at 50°C for 1h , to obtain hydrophobic nano-silica.
Embodiment 1
[0053] Preparation method of hydrophobic recycled aggregate ecological drainage brick:
[0054]S1. Add 36kg of fine sand with a particle size of 1~5mm, 74kg of recycled coarse aggregate with a particle size of 5~10mm, and 0.1kg of polycarboxylate superplasticizer into the first mixer, stir for 1min, then add 44kg of cement, continue stirring for 1min, and then add 15kg of water, continue stirring for 2 minutes to obtain the bottom slurry; add 8kg of cement, 6.2kg of fine sand and 3.5kg of water into the second mixer, and stir for 2 minutes to obtain the top slurry; first add the bottom slurry to the brick machine, vibrate, and Under the action of the brick machine mold, the base material layer is formed, and then the fabric slurry is added to the brick machine, and the vibration is continued to form a plane surface fabric layer, and a green body is formed, and finally the green body is transferred to the curing room for curing.
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Abstract
The invention relates to the field of resourceful treatment of building wastes, and particularly discloses a hydrophobic recycled aggregate ecological drainage brick and a preparation method thereof. The hydrophobic recycled aggregate ecological drainage brick comprises a bottom material layer, a surface material layer and a hydrophobic coating which are sequentially arranged, the hydrophobic coating comprises primer and finishing paint, and the primer is prepared from raw materials including epoxy resin, a curing agent and ethyl alcohol; and the finishing paint is prepared from the following raw materials in parts by weight: silicon carbide, hydrophobic nano silicon dioxide, tackifying resin, a stabilizer and ethanol. The preparation method comprises the following steps: S1, compacting the bottom material layer and the surface material layer, and maintaining; S2, stirring the raw materials of the primer and raw materials of the finishing paint respectively; and S3, spraying primer on the surface material layer, curing at room temperature, spraying finish paint on the basis of the primer after curing, and standing to form a hydrophobic coating, thereby obtaining the hydrophobic ecological drainage brick. The hydrophobic recycled aggregate ecological drainage brick has the advantage that the drainage effect of the drainage brick is improved.
Description
technical field [0001] The application relates to the field of construction waste resource treatment, more specifically, it relates to a hydrophobic recycled aggregate ecological drainage brick and a preparation method thereof. Background technique [0002] Road drainage is the key to urban construction. It is related to the city's ability to resist the impact of rainwater and whether the city can function normally in heavy rain. Therefore, people have carried out various researches on road drainage. Among them, the drainage brick is a common road drainage structure. The drainage brick is laid on the ground, and the water permeates through the drainage brick and then infiltrates underground or flows into the pipe to realize drainage. [0003] When manufacturing drainage bricks, recycled aggregates are often added. Recycled aggregates are aggregates that are reused by crushing, cleaning and screening construction waste, which can realize the resource utilization of constructi...
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