新型建筑材料2023．02磷石膏/生土复合调湿材料研究蔡国俊，陈刚，黄峰，梅江涛，许斌（中建八局第三建设有限公司，江苏南京210046）摘要：以磷石膏、生土为原材料，经无机掺合料改性，制备磷石膏/生土复合调湿材料。通过试验研究了材料的力学性能、耐水性及调湿性能。结果显示，将磷石膏掺量控制在5%～9%，复合调湿材料的60d抗压强度为4.48～5.83MPa；软化系数为0.71～0.82；最大吸湿速率达到0.0472～0.0516kg/（kg·d）；最大放湿速率达到0.0380～0.0434kg/（kg·d）。微观分析显示，磷石膏本身具有胶凝作用，无机改性掺合料与原材料中的SiO2反应，生成二水石膏、C-S-H凝胶、伊利石和钙沸石等物质，提高材料的强度和耐水性；复合调湿材料孔隙结构丰富，可通过毛细孔道效应、表面物理及化学吸附对水分子产生作用力，调湿性能优异。关键词：磷石膏/生土复合调湿材料；抗压强度；软化系数；吸放湿速率中图分类号：TU526文献标识码：A文章编号：1001-702X（2023）02-0096-05Studyonphosphogypsum/rawsoilcompositehumidity-controllingmaterialCAIGuojun，CHENGang，HUANGFeng，MEIJiangtao，XUBin（TheThirdConstructionCo.Ltd.，ofChinaConstructionEighthEngineeringBureau，Nanjing210046，China）Abstract：Withtheeffectofinorganicmodifiedadmixtures，phosphogypsum/rawsoilcompositehumidity-controllingmaterialwaspreparedbyusingphosphogypsumandrawsoilasrawmaterials.Themechanical，waterresistanceandhumidity-controllingpropertiesofthehumidity-controllingwereexploredthroughexperiments.Theresultsshowthatthecompositecontentofphospho－gypsumiscontrolledat5%~9%，the60dcompressivestrengthofthematerialis4.48~5.83MPa.Thesofteningcoefficientismain－tainedat0.71~0.82.Themaximummoistureabsorptionanddesorptionratesreach0.0472～0.0516kg/（kg·d）and0.0380～0.0434kg/（kg·d）respectively.ThemicroscopicanalysisshowsthatthehydrationreactionofphosphogypsumandthereactionofinorganicmodifiedadmixturewithSiO2inrawmaterialsproducedihydrategypsum，C-S-Hgel，IlliteandCalciumZeolite，whichimprovesthestrengthandwaterresistance.Thecompositehumidity-controllingmaterialhasrichporestructure，whichcanexertforceonwatermoleculesthroughcapillaryporeeffect，surfacephysicalandchemicaladsorption...
