摘要
以生石灰作为改性材料对未经煅烧处理的磷石膏进行改性除杂,陈化后,经成球、水泥包裹处理,再与胶凝材料、碎石等在添加适量水的情况下混合,采用振动加压成型工艺、自然养护的方式生产出软化系数达到0.84、抗压强度达到21.5MPa以上的耐水高强磷石膏实心砖,其它性能指标符合GB/T 21144—2007《混凝土实心砖》标准中MU20等级要求,使得磷石膏实心砖的应用范围更加广泛,从而为解决磷石膏的综合利用问题提供了一条新的途径。
The uncaicined phosphogypsum is modified and purified by quicklime, via the aging, bailing and cement coating process. And then the material is mixed with an appropriate amount of water, the cementitious material, gravel, andso on. After using the vibration pressure molding process and the nature curing, the prepared high-strength phosphogypsum water-resistant solid bricks can reach the softening coefficient of 0.84 and compressive strength of 21.5 MPa. The otherproperties can meet the requirement of MU20 grade requirements product of the GB/T 21144-2007 〈Concrete solid brick〉, which make the phosphogypsum solid bricks have broader range of applications, and it may provide a new way to solve thecomprehensive utilization of phosphogypsum.
出处
《混凝土与水泥制品》
北大核心
2013年第3期58-61,共4页
China Concrete and Cement Products
基金
广东省高新技术产业化项目-工业攻关(2010B010900049)
关键词
磷石膏
软化系数
成球
水泥包裹
Phosphogypsum
Softening coefficient
Balling
Cement coating
