Autoclaved aerated concrete and preparation method thereof

• Main Authors: SHAO NINGNING, KONG FANLONG, LIU ZE, WANG CHUNXUE
• Format: Patent
• Language: Chinese; English
• Published: 03.09.2014
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATERTREATMENT OR WASTE MANAGEMENT; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LIME, MAGNESIA; METALLURGY; REFRACTORIES; SLAG; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF NATURAL STONE

The invention discloses an autoclaved aerated concrete and a preparation method thereof, and the autoclaved aerated concrete comprises mineral raw materials, an alkaline exciting agent, a foaming agent, a foam-stabilizing agent, a slow-release agent and the like. The mineral raw materials comprise 80-100wt.% of fly ash, and other mineral raw materials comprise mineral waste residue, metakaolin, silica fume, steel slag, circulating fluidized bed bottom ash and the like; the alkaline exciting agent mass is 40-55wt.% of the mineral raw material mass, the foaming agent mass is 0.13-5wt.% of the mineral raw material mass, the foam-stabilizing agent mass is 0.03-0.09wt.% the mineral raw material mass, and the slow-release agent mass is 2-3.5wt.% of the mineral raw material mass. The alkaline exciting agent including sodium silicate and NaOH / KOH, the mineral raw materials, the foaming agent and the foam-stabilizing agent are mixed for stirring, then are filled in a mould for prefabrication forming or casting formi