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- 保温材料与建筑节能
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磷石膏-水泥-聚苯颗粒保温板的制备与性能
作者：郑育春
（金华职业技术学院 建筑工程学院，浙江 金华 321007）
摘要：在140 ℃、0.5 MPa下蒸养4 h，将磷石膏脱水得到半水石膏，并利用脱水后的磷石膏、水泥和聚苯颗粒，制备了磷石膏-水泥-聚苯颗粒保温板。试验结果表明，磷石膏-水泥复合胶凝材料中水泥和柠檬酸缓凝剂的最佳掺量分别为9%和0.8%。磷石膏-水泥-聚苯颗粒保温板制备的最佳发泡剂掺量为5%，最佳胶聚比为27.56，制备的磷石膏-水泥-聚苯颗粒保温板的抗压强度为0.36 MPa，导热系数为0.078 W/（m·K），放射性符合GB 6566—2010《建筑材料放射性核素限量》的要求。
关键词：磷石膏；水泥；聚苯颗粒；保温板
中图分类号：TU55+1.2 文献标识码：A 文章编号：1001-702X（2019）04-0095-04
Preparation and properties of phosphogypsum-cement-polybenzene particles insulation board
ZHENG Yuchun
（School of Pharmaceutics and Material Engineering，Jinhua Polytechnic College，Jinhua 321007，China）
Abstract：When curing temperature is 140 ℃ and pressure is 0.5 MPa，after 4 h curing, phosphogypsum is transformed into hemihydrate gypsum. This paper utilized the hemihydrate gypsum, cement and polystyrene particles prepared phosphogypsum-cement-polystyrene particles insulation board. The results show that the optimal content of cement and citric acid retarder for phosphogypsum-cement composite cementing material is 9% and 0.8%，respectively. The optimal foaming agent content of phosphogypsum cement polybenzene particle insulation board is 5%. The optimal cementing material/polybenzene particles was 27.56. The compressive strength of the prepared phosphogypsum cement polybenzene particle insulation board was 0.36 MPa，and the thermal conductivity was 0.078 W/（m·K）. The radioactivity of phosphogypsum-cement-polybenzene particle insulation board meets the requirements of GB 6566—2010 "Limit of Radio nuclides for Building Materials".
Key words：phosphogypsum，cement，polybenzene particles，insulation board