煅烧红土替代红土制备红灰的可行性研究  

Feasibility Study on Preparation of Red Lime from Calcined Red Clay Instead of Red Clay

作　　者：陈寅炜 王菊琳[1,2,3] CHEN Yinwei;WANG Julin(School of Material Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China;Beijing Key Laboratory of Electrochemical Process and Technology for Materials,Beijing University of Chemical Technology,Beijing 100029,China;Key Research Base of State Administration of Cultural Heritage for Evaluation of Science and Technology Research in Cultural Relics Protection Field,Beijing 100029,China)

机构地区：[1]北京化工大学材料科学与工程学院,北京100029 [2]北京化工大学材料电化学过程与技术北京市重点实验室,北京100029 [3]文物保护领域科技评价研究国家文物局重点科研基地,北京100029

出　　处：《建筑材料学报》2023年第3期332-338,共7页Journal of Building Materials

摘　　要：古建筑红灰存在强度低、耐冻融性较差等现象,为提高红灰的性能,将红土分别于600、800℃下进行煅烧,并用煅烧红土替代红土与石灰混合制备红灰,并研究了红灰试样的物理力学性能及耐冻融性.结果表明以煅烧红土为原料的试样性能皆优于以红土为原料的试样,其中耐冻融性显著提升.分析各试样的物相组成与微观形貌可知,煅烧红土与氢氧化钙发生了火山灰反应,且添加了煅烧红土的试样中骨料与基体结合更为紧密,这是其性能提升的重要原因.Red lime using in ancient buildings had low strength and poor freeze-thaw resistance.In order to improve the performance of red lime,red clay was calcined at 600℃and 800℃,respectively.The calcined red clay instead of red clay was mixed with lime to produce red lime.The physical and mechanical properties and freeze-thaw resistance of red lime samples were studied.The results show that the properties of samples using calcined red clay as raw material are better than those using red clay as raw material,and the freeze-thaw resistance is significantly improved.The phase composition and microstructure of each sample are analyzed and it can be seen that pozzolanic reaction occurs between calcined red clay and calcium hydroxide.The aggregates in the samples with calcined red clay are bound more strongly to the matrix,which is an important reason for its performance improvement.

关 键 词：古建筑 红灰 煅烧红土 火山灰反应 

分 类 号：TU526[建筑科学—建筑技术科学]