外加剂及泡沫对脱硫建筑石膏性能影响研究  

Study on effects of additives and foam on performance of desulphurisation building gypsum

作　　者：廖正毅 肖诗豪 姜浙江 王玲玲 孔德文 谢钦 张玥 LIAO Zheng-yi;XIAO Shi-hao;JIANG Zhe-jiang;WANG Ling-ling;KONG De-wen;XIE Qin;ZHANG Yue(School of Civil Engineering,Guizhou University,Guiyang 550025,China;Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety,Guiyang 550025,China;School of Civil Engineering,Guizhou Institute of Technology,Guiyang 550003,China)

机构地区：[1]贵州大学土木工程学院,贵州贵阳550025 [2]贵州省岩土力学与工程安全重点实验室,贵州贵阳550025 [3]贵州理工学院土木工程学院,贵州贵阳550003

出　　处：《应用化工》2023年第12期3279-3283,共5页Applied Chemical Industry

基　　金：国家自然科学基金(52168027,52108449)。

摘　　要：研究聚羧酸类减水剂、蛋白质类缓凝剂与物理发泡类泡沫对脱硫建筑石膏性能的影响,结合微观形态分析影响机理,并建立回归模型,预测脱硫建筑石膏性能。结果表明,在掺入0.5%减水剂以及0.1%缓凝剂的条件下,泡沫导致脱硫建筑石膏内部气孔增多,孔径增大,脱硫建筑石膏密度、强度、软化系数及导热系数随泡沫掺量的增加而下降。当泡沫掺量为12%时,脱硫建筑石膏28 d干密度达到537.13 kg/m^(3),7,28 d抗压强度分别为1.63 MPa与1.87 MPa。回归模型预测结果表明,非线性拟合模型能够更好地反映出抗压强度、导热系数与密度的关系。The effects of polycarboxylic acid type water reducing agent,protein type retarder and physical foaming type foam on the performance of desulfurization building gypsum were investigated.The microscopic morphology was utilized to analyze the influence mechanism and a regression model was established to predict the performance of desulfurization building gypsum.The results showed that based on the admixture of 0.5%water reducing agent and 0.1%retarder,the number and sizes of pores internal desulfurization building gypsum increased.The density,strength,softening coefficient and thermal conductivity of desulfurization building gypsum decreased with the increase of foam dosage.At the foam dosage of 12%,the 28 d dry density of desulfurization building gypsum reached 537.13 kg/m^(3),and the 7 d and 28 d compressive strengths were 1.63 MPa and 1.87 MPa,respectively.The prediction results of regression model show that the nonlinear fitting model well can reflect the relationships between density and compressive strength as well as thermal conductivity.

关 键 词：脱硫建筑石膏 泡沫 导热系数 强度 回归模型 

分 类 号：TQ177.3[化学工程—硅酸盐工业]