CN1978367A - Waterproof heat-insulating flyash foamed concrete block - Google Patents

Abstract

The invention relates to a waterproof and heat-insulating fly ash foam concrete block, the preparation of which comprises the following steps: 1. preparing a waterproofing agent; 2. preparing a foaming agent; 3. reacting the foaming agent and water in a foam generator; 4. Add fly ash, lime, cement, raw gypsum, waterproofing agent and water into the mixer, and mix and stir for 5 minutes; 5. Pour the foam generated in the foam generator into the mixer and mix and stir for 3 minutes; Autoclaved curing. The product has low saturated water absorption, low thermal conductivity, and multiple functions such as waterproof, fireproof, heat insulation, and heat preservation. It can be widely used in multi-storey civil buildings, general industrial building load-bearing walls or internal and external walls of frame structure buildings.

Description

Waterproof and thermal insulation fly ash foam concrete block

Technical field

The invention relates to a new type of building energy-saving material, in particular to a wall material with the functions of waterproof, fire prevention, heat insulation and heat preservation.

Background technique

At present, aerated concrete blocks and fly ash aerated blocks, which are widely used in wall materials, have the function of thermal insulation to a certain extent, but generally have the defects of poor impermeability and high water absorption. Both practice and test results show that the maximum water absorption rate of the above materials can reach more than 50%. As the moisture content increases, the thermal conductivity also increases, resulting in a greatly reduced thermal insulation performance, which can easily cause engineering quality problems such as wall cracks.

In recent years, many new wall materials have emerged on the market, but in terms of waterproof and heat insulation. Either it is impossible to take both into account at the same time, or the cost is too high to be popularized and promoted.

Contents of the invention

In order to overcome the various defects of the above-mentioned wall materials in practical application, the present invention aims to provide a fly ash foam concrete block with dual functions of waterproof and heat insulation.

The present invention is realized through the following technical solutions, comprising the following steps:

(1) Preparation of waterproofing agent: Dissolve sodium carbonate, potassium hydroxide, and calcium chloride in water, add heated and melted stearic acid into the mixture, and finally add the other half of water, mix well to form soap, and then add quantitative Ammonia, stir well.

(2) Preparation of foaming agent:

Prepare glue and rosin lye, and mix them together to form a foaming agent.

(3) Dilute the foam agent and water at a ratio of 1:8 and pour it into the foam generator, and connect it with an air compressor, and pass the compressed air into the foam generator.

(4) Add fly ash, lime, cement, quick gypsum, waterproofing agent and water into the mixer, mix and stir for 5mins.

(5) Pour the foam generated in the foam generator into the mixer and mix and stir for 3mins, pour into the mold, and perform natural curing or autoclaving curing.

The present invention can be applied to multi-storey civil buildings, general industrial building load-bearing walls or frame structure building interior and exterior walls, and its beneficial effect is that the saturated water absorption rate of the waterproof and heat-insulating fly ash foam concrete block is less than 5%, which solves the problems of wall cracking, A series of engineering problems such as freezing damage, and its small thermal conductivity can significantly improve the thermal insulation and thermal insulation performance of the wall. At the same time, due to the use of waste fly ash as raw materials, the cost is low, it is beneficial to environmental protection, easy to popularize, and fully meets the requirements of building energy conservation.

Detailed ways

(1) Prepare waterproofing agent: heat a certain amount of water to 50-60°C, dissolve sodium carbonate, potassium hydroxide, and calcium chloride in water, add heated and melted stearic acid into the mixture, stir evenly, and finally Add the other half of the water and mix well to form a soap liquid. After cooling to 25-30°C, add a certain amount of ammonia water and stir evenly. Wherein the mass percent of each component in the synthetic waterproofing agent is: sodium carbonate: potassium hydroxide: calcium chloride: stearic acid: ammonia water: water = 0.20: 1.10: 0.15: 5.00: 2.0: 91.55.

(2) Preparation of foaming agent:

a) Preparation of glue solution Weigh the bone glue and put it into the inner pot, then add it into the outer pot and heat it with water until it is completely dissolved.

b) Preparation of rosin lye Make the lye into lye, put it into the inner pot, then add it into the outer pot and heat it with water. 4 hours.

c) Preparation of foaming agent After the boiled rosin lye and glue are cooled to about 50°C, pour the glue into the lye and stir evenly to become a foaming agent.

Wherein the mass percent of each component in the synthetic foam is: rosin: sodium hydroxide: bone glue: water=1: 0.125: 1.5: 2.19.

(3) Dilute the foam agent and water at a ratio of 1:8 and pour it into the foam generator, and connect it with an air compressor, and pass the compressed air into the foam generator.

(4) Add fly ash, lime, cement, quick gypsum, waterproofing agent and water into the mixer. The ratio of raw materials used in the first three items is 7:3:1 in turn, and the amount of raw gypsum is 3% to 5%. The dosage is 0.5% to 1% of the cement, and the mixture is stirred for 5 minutes.

(5) Pour the foam generated in the foam generator into the mixer and mix and stir for 3mins, pour into the mold, and perform natural curing or autoclaving curing.

Claims (2)

1. A waterproof and heat-insulating fly ash foam concrete block, characterized in that it comprises the following steps: (1) Preparation of waterproofing agent: Dissolve sodium carbonate, potassium hydroxide, and calcium chloride in water, add heated and melted stearic acid into the mixture, and finally add the other half of water, mix well to form soap, and then add quantitative Ammonia, stir well; (2) Preparation of foaming agent: Prepare glue and rosin lye, and mix the two together to form a foaming agent; (3) Dilute the foam agent and water in a ratio of 1:8 and pour it into the foam generator, and connect it with the air compressor, and pass the compressed air into the foam generator; (4) Add fly ash, lime, cement, quick gypsum, waterproofing agent and water into the mixer, mix and stir for 5mins; (5) Pour the foam generated in the foam generator into the mixer and mix and stir for 3mins, pour into the mold, and perform natural curing or autoclaving curing. 2. The waterproof and heat-insulating fly ash foam concrete block prepared according to claim 1 is applied to multi-storey civil buildings, general industrial building load-bearing walls or internal and external walls of frame structure buildings.