新型生物质硅掺合料的活性及影响因素研究  

Activity and Influence Factors of New Biomass Silicon Admixture

作　　者：曹锋[1,2] 乔宏霞 张颖 李双营[1] 赵紫岩[1] CAO Feng;QIAO Hongxia;ZHANG Ying;LI Shuangying;ZHAO Ziyan(School of Civil and Transportation Engineering,Qinghai Minzu University,Xining 810000,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]青海民族大学土木与交通工程学院,西宁810000 [2]兰州理工大学土木工程学院,兰州730050

出　　处：《硅酸盐通报》2023年第6期2140-2149,共10页Bulletin of the Chinese Ceramic Society

基　　金：青海省基础研究计划(2022-ZJ-921);国家自然科学基金(51868044);天津大学-青海民族大学自主创新研究基金(2022TQ02)。

摘　　要：为了解决废弃农作物青稞秸秆的资源处置问题,将废弃青稞秸秆在室外自然焚烧后再经过煅烧及研磨处理,从而制备成新型生物质硅掺合料。通过正交试验设计对青稞秸秆灰(HBSA)的制备条件及设计参数进行初步分析与二次验证;采用响应面优化分析方法建立响应面预测模型,对HBSA的制备条件进一步优化分析,从而验证正交试验结果的合理性;基于灰熵关联分析,确定了HBSA的活性影响因素的主次关系;采用多种微观测试技术对最优条件下制备的HBSA的微观结构进行测试分析,进而揭示HBSA能够作为活性掺合料的原因。结果表明,当二次煅烧温度为600℃、煅烧时间为2 h、研磨时间为2 h时,HBSA的活性最高,相对活性指数高达1.06。响应面优化方法能够有效用于HBSA的活性制备参数设计,响应面预测模型具有较高的预测精度,较好地验证了正交试验结果的准确性。煅烧温度的灰熵关联度最大,应作为HBSA制备过程中的首要控制因素。HBSA具有较细的粒度、较大的比表面积和较高的活性SiO_(2)含量,有效促进了HBSA的活性效应。In order to solve the problem of resource disposal of abandoned crop highland barley straw,the abandoned highland barley straw is naturally burned outdoors and then calcined and ground again to prepare new biomass silicon admixture.The preparation conditions and design parameters of highland barley straw ash(HBSA) were preliminarily analyzed and verified by orthogonal test design.The response surface optimization analysis method was used to establish the response surface prediction model,and the preparation conditions of HBSA were further optimized and analyzed,so as to verify the rationality of orthogonal test results.In addition,based on grey entropy correlation analysis,the primary and secondary relationship of the influence factors of HBSA activity was determined.The microstructure of HBSA prepared under the optimum conditions was tested and analyzed by using a variety of microscopic testing techniques,and the reason why HBSA can be used as active admixture was revealed.The results show that the activity of HBSA is the highest when the second calcination temperature is 600 ℃,the calcination time is 2 h,and the grinding time is 2 h.The relative activity index of HBSA is 1.06.The response surface optimization method can be effectively used for the design of HBSA activity preparation parameters.The response surface prediction model has a high prediction accuracy,which better verifies the accuracy of orthogonal test results.The gray entropy correlation of calcination temperature is the largest,which should be the primary control factor in the preparation of HBSA.Because HBSA has finer particle size,larger specific surface area and higher active SiO_(2) content,it effectively promotes the active effect of HBSA.

关 键 词：生物质硅 掺合料 活性效应 正交试验 响应面优化 灰熵关联分析 微观结构 

分 类 号：TU526[建筑科学—建筑技术科学]