Foam concrete

Abstract

The invention discloses a foam concrete, which comprises admixture, cementing material and chemical auxiliary agent, wherein the weight percentage of the admixture in the foam concrete is 25-40%, the weight percentage of the cementing material in the foam concrete is 45-75%, the weight percentage of the chemical auxiliary agent in the foam concrete is 5-25%, the cementing material comprises cement clinker, calcium oxide and bone gelatin powder, and the mass ratio of the three ingredients in the cementing material is 2: 2: 1. The invention further discloses a preparation method of the foam concrete. The preparation method comprises the following steps: foam technology, slurry processing, chemical auxiliary agent processing, mixing, shaping and curing. The foam concrete has the advantages that the cementing material is made of cement clinker, calcium oxide and bone gelatin powder and the use of a great amount of cement is avoided, so that the coal resources required for producing cement is reduced, which not only relieves the tension of energy utilization, but also can improve the compressive strength, leakage resistance, sound insulation effect of the foam concrete.

Description

technical field [0001] The invention belongs to the technical field of engineering materials, and in particular relates to a foam concrete. Background technique [0002] Foamed concrete is to introduce air or nitrogen, carbon dioxide, oxygen and other gases into the concrete slurry according to the application needs through chemical or physical means, and after reasonable maintenance and molding, it forms a concrete with a large number of small closed pores and has considerable strength. Products, the production method is usually to prepare the foam agent aqueous solution into foam by mechanical method, and then add the foam to the slurry composed of siliceous material, calcium material, water and various additives, etc., after mixing and stirring, pouring A porous material formed and cured. [0003] At present, in my country's construction industry, cement, sand, and stones are generally used in the form of concrete compounded with admixtures and water. The building body i...

AI Technical Summary

Problems solved by technology

Most of the existing foam concrete materials are mainly cement, and the cement is directly used as the cementing material, and the mass percentage in the concrete can account for 70-85%. Add foaming agent to mix and maintain to form concrete, but the demand for cement in this formula is large, and a large amount of coal resources will be consumed in cement production, and a large amount of carbon dioxide greenhouse gas will be released. Over time, it will cause a shortage of resources and aggravate the greenhouse effect, causing pollution to the environment, and the formed concrete still needs to be strengthened in terms of compression, and the compressive strength of each cubic concrete is generally lower than 2.0MPa

[0004] The current self-compacting foam concrete materials are also made of slag and cement as raw materials, but they all need some alkaline activators and surfactants to improve the chemical activity, improve the cohesion, and improve the sound insulation and sound insulation of the formed concrete. Compressive performance, but this kind of concrete is easy to crack and absorb water. Even if fiber and water repellent are added to the material, the cost will increase but it still cannot achieve good impermeability. A large amount of alkaline excitation is added to the formula Agents and surfactants make the formed concrete chemical reagents smell heavy, pollute the environment, and have a very adverse impact on environmental protection