1. Usage and characteristics
The foaming agent is Baise powder, which is a new multifunctional foaming agent made of organic polymer materials and polymerized through scientific technology. Mainly used in foam concrete, foam concrete partition boards, gypsum boards, foam composite silicate thermal insulation materials, foam fly ash ceramsite and other inorganic and organic products that need to reduce bulk density and foam and create pores. In foam Using this foaming agent in concrete products can reduce the density (weight) of the product without changing the water-cement ratio of the original concrete.
This foaming agent foams quickly and has a long foam stabilization time. Good stability. It has high strength for foamed concrete and insulation material products. The solution density of the foaming agent is 200-10000g/l, and the bubble size is um-mm.
II. Performance indicators
2% aqueous solution, surface tension 0.02n/m, surface viscosity 1.55Pa.s, foam life 15h.
3. Dosage and usage
1. The foaming agent content is 0.8-1.0% of the slurry mass or 0.2-0.4% of the cementing material. Mix 50 times with water to make foam, that is, weigh 1kg of foaming agent, add 50kg of tap water, and use a high-speed beater to beat the aqueous solution containing the foaming agent into fine foam (the water stop cannot be seen). Add the fine foam (without water) to the slurry for making the product to reduce the bulk density of the product by 1/2. The added amount is determined based on the bulk density of the product.
2. As a foaming agent, it is required to reduce the dry bulk weight of the product without reducing the strength of the product. After the product is hardened, there will be no shrinkage and no impact on the early strength and later strength. It will also affect the adhesion and shear strength of the product. The shear strength does not decrease. In the experiment, cement perlite concrete was selected. Without changing the original formula ratio and water-cement ratio, 0.8% foaming agent was added to the slurry, and foaming began under mechanical stirring. Under the condition that the fluidity of foam concrete is 85%, it is cured with mold for 3 days, and after demoulding, it is cured naturally for 4 weeks. The results are listed as follows:
Performance of adding 0.4% foaming agent to cement perlite concrete slurry
Name
Dry density (kg/cubic meter)
Compressive failure strength (Mpa)
Water absorption (%)
Surface plastering test
0.4% hydrophobic foaming agent
Concrete
880
2.4
5
Direct plastering
Cement perlite concrete
1160
2.6
38
Rough plastering
Note: 1. The compressive failure load value is the average of 3 tests.
2. Drench the sample with water for 4 hours, take it out and dry the surface, weigh it and calculate the water absorption rate.
From the table, it can be seen that the capacity of concrete has been reduced, but the compressive strength has not been reduced, and the hydrophobicity has been improved. And it can be plastered directly, which simplifies the construction process.
4. This product should be protected from moisture and sun, and stored in a dry and ventilated place. Each bag is packed in 10kg and has a shelf life of two years.
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