High-doping-amount furnace slag aerated concrete building block and preparation method thereof

Abstract

The invention relates to a wall concrete material, particularly a high-doping-amount furnace slag aerated concrete building block and a preparation method thereof. The high-doping-amount furnace slag aerated concrete building block is composed of the following components in parts by weight: 125-140 parts of furnace slag, 30-46 parts of quicklime, 10-15 parts of cement, 4-7 parts of slaked lime, 1-3 parts of desulfurized gypsum, 0.2-0.3 part of aluminum powder paste, 0.005-0.01 part of thickener, 0.03-0.08 part of foam stabilizer and 175-225 parts of water. The furnace slag comprises 20-35% of SiO2, 40-50% of Al2O3, 12-17% of Fe2O3, 3-5% of CaO and at most 2.0% of MgO. The PAI index of the furnace slag is greater than 55%. The high-doping-amount furnace slag aerated concrete building block prepared by the method has the advantages of low cost and favorable properties.

Description

technical field [0001] The invention relates to a wall concrete material, in particular to a high-volume slag aerated concrete block and a preparation method thereof. Background technique [0002] Autoclaved aerated concrete blocks are made of siliceous materials and calcareous materials as the main raw materials, mixed with an air-generating agent, stirred with water, formed pores by chemical reaction, and processed by pouring molding, pre-cured cutting, autoclaved curing, etc. A lightweight and porous new building wall material. Autoclaved aerated concrete has the following advantages as a wall material: 1. Light bulk density, its weight is only 1 / 3 of clay bricks and 1 / 5 of ordinary concrete. It is ideal for high-rise, super high-rise buildings and large space structures. 2. Good thermal insulation performance and low thermal conductivity, meeting the requirements of modern buildings for wall insulation; 3. Strong machinability, aerated concrete blocks have a good modulu...

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Problems solved by technology

The molten material produced by coal in the combustion chamber of the boiler contains a certain amount of coal ash. Since it cannot be used in large quantities at present, its stacking will cause continuous damage to the environment. The production of bricks, ordinary concrete, and concrete hollow blocks is only added in a small amount to replace part of the fly ash. In order to ensure the strength and heat preservation effect of the product, the application of high-volume slag has not been realized, and The above-mentioned utilization methods of slag have not fundamentally solved the negative effects of low normal temperature activity of slag, high carbon content, large water demand ratio, and the addition of efflorescent alkali at room temperature, and have not fully stimulated the high temperature activity of slag

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