- 呂 偉，吳赤球，龔文輝，胡 彪
引用本文利用電石渣對磷石膏進行改性，得到了改性磷石膏，將改性磷石膏、水泥、礦渣粉按一定比例混合，采用造粒成球工藝制成改性磷石膏輕骨料，研究了改性磷石膏摻量和養護齡期對改性磷石膏輕骨料性能的影響，分析了改性磷石膏輕骨料替代部分碎石在磷石膏基路基材料中應用的可行性。結果表明：隨著改性磷石膏摻量的增加，改性磷石膏輕骨料的筒壓強度和軟化系數降低，吸水率增大；當改性磷石膏摻量為88%、養護齡期為60 d時，改性磷石膏輕骨料的筒壓強度為5.8 MPa、吸水率為9.8%、軟化系數為0.75，符合GB/T 17431.1—2010《輕集料及其試驗方法 第1部分：輕集料》的要求。研制的改性磷石膏輕骨料已成功應用于道路工程中。 The modified phosphogypsum was obtained by modifying phosphogypsum with carbide slag. The modified phosphogypsum, cement, and slag powder were mixed in a certain proportion, and the modified phosphogypsum lightweight aggregate was made by the granulation process. The effects of modified phosphogypsum content and curing age on the properties of modified phosphogypsum lightweight aggregate were studied, and the feasibility of using modified phosphogypsum lightweight aggregate to replace part of crushed stone in phosphogypsum-based subgrade materials was analyzed. The results show that with the increase of modified phosphogypsum content, the cylinder compressive strength and softening coefficient of modified phosphogypsum lightweight aggregate decrease, and the water absorption rate increases. When the content of modified phosphogypsum is 88% and the curing age is 60 d, the cylinder compressive strength of modified phosphogypsum lightweight aggregate is 5.8 MPa, the water absorption rate is 9.8%, and the softening coefficient is 0.75, which meets the requirements of GB/T 17431.1—2010 Lightweight Aggregates and Its Test Methods—Part 1: Lightweight Aggregates. The developed modified phosphogypsum light aggregate has been successfully used in road engineering.
呂偉,吳赤球,龔文輝,等.改性磷石膏輕骨料在路基材料中的應用研究[J].混凝土與水泥制品,2022(6):82-86. LYU W,WU C Q,GONG W H,et al.Research on the Application of Modified Phosphogypsum Lightweight Aggregate in Subgrade Materials[J].China Concrete and Cement Products,2022(6):82-86.