Shenzhen Branch-Building Material Co., Ltd. is a franchise of the new energy-saving light wall materials - aerated concrete slab large enterprises. The company's total registered capital of 5 million yuan, accurate filling brick, fixed assets of 30 million yuan, accurate filling brick, the annual output of up to 300,000 cubic meters. 1. Gypsum: dihydrate gypsum or phosphogypsum, accurate filling brick clip, sulfur trioxide content greater than 35%. 2. Aluminum paste: solids content of greater than 65%, greater than 90% active aluminum content. 3. Cement: 32.5R bulk cement. Fly technical requirements SiO2≥40%; Al2O3 15 ~ 35%; Fe2O3 <15%; MgO≤3.5%; SO3≤2%; loss on ignition <10%; fineness (0.08㎜ square hole sieve) <15%. The technical requirements for gypsum CaSO4 nH2O> 70%;? Fineness (0.08㎜ square hole sieve) <15% (V) to paste the technical requirements of aluminum aluminum paste, quality should meet "aerated concrete with aluminum cream "JC / T407-91 standards.