| 摘要 |
FIELD: construction.SUBSTANCE: this process comprises proportioning and mixing of 0.96 kg of aluminium powder with 20 kg of quartz sand and 3.4 kg of flue ash. Made mix is ground till free passage through screen No. 0.63 and proportioned. Then, some 15.6 kg of Portland cement, 15.6 kg of ground quicklime and 18.6 kg of water heated to 70-100°C are successively added to said mix. The latter is placed in forms heated to 35-45°C and hardened. The, it is withdrawn from said forms and subjected to thermomoist processing at 175°C and 0.8 MPa for 10-12 hours. Proposed method comprises proportioning and mixing of 0.96 kg of aluminium powder with 23.4 kg of quartz sand and their mixing till passage through screen No. 0.14.Proportioning and sequential addition of 31.2 kg of Portland cement and 18.6 kg of water heated to 70-100°C. The latter is placed in forms heated to 35-45°C and hardened. It is withdrawn from said forms and subjected to thermomoist processing at 95°C for 16-18 hours.EFFECT: simplified process.2 cl, 2 ex |
