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枣庄矿务局科技处等单位承担的煤矸石、粉煤灰双免砖的研究,经二年多的研究试验,各项技术指标(抗压、抗折、抗冻、放射性等)均达到国家100～150号以上砖的质量标准,已于1990年4月20日通过技术鉴定。 这种砖采用自燃后的煤矸石或粉煤灰为主要原料,加入少量的无机胶结剂(化工厂废料)和微量的有机添加剂,喷入少量水,经搅拌、压制成型,自然养护一周后,即可出厂使用。鉴定认为:双免法(不烧结、不蒸养)工艺生产墙体砖、铺路砖,具有综合利废、节约能源、保护土地、工艺简单、投
The research of coal gangue and fly ash double-free bricks undertaken by the Science and Technology Department of the Zaozhuang Mining Bureau and other units, after more than two years of research and testing, the technical indicators (pressure resistance, flexural resistance, freeze resistance, radioactivity, etc.) have reached the national level. The quality standards for bricks no less than 100 to 150 have passed technical appraisal on April 20, 1990. This kind of brick uses self-ignited coal gangue or fly ash as the main raw material, adding a small amount of inorganic binder (chemical plant waste) and trace amount of organic additives, spraying a small amount of water, stirring, pressing and forming, after a week of natural conservation, Can be used at the factory. According to the appraisal, the double exemption (non-sintering and non-steaming) process is used to produce wall bricks and paving blocks, which has comprehensive benefits, energy conservation, land protection, simple process, and investment.