红土含量对古建红灰性能的影响及作用机制  

Influence of Red Clay Content on the Performance of Red Lime Using in Ancient Buildings and Its Mechanism

作　　者：王辉 张典[1] 陈寅炜 王菊琳[2,3] WANG Hui;ZHANG Dian;CHEN Yinwei;WANG Julin(The Palace Museum,Beijing 10029,China;College of Material Science and Engineering,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]故宫博物院,北京100029 [2]北京化工大学材料科学与工程学院,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》2022年第10期1055-1060,共6页Journal of Building Materials

基　　金：故宫博物院2019年度科研课题经费资助项目(KT2019-11)。

摘　　要：制备了一定梯度红土含量的红灰样品,通过物理力学性能测试、冻融循环试验分析了红土含量对红灰性能的影响,并采用X射线衍射(XRD)、红外光谱(FTIR)、扫描电子显微镜(SEM)等技术探究了红土的作用机制.结果表明:添加红土后,红灰的防水性、力学性能与耐冻融性均得到改善;红灰中红土与Ca(OH)_(2)发生了火山灰反应,生成的水化硅酸钙填充在红灰孔隙中,提高了其结构的致密性;随着红土掺量的增加,红灰的碳化速率加快,有利于其早期强度的提升.Red lime samples with a certain gradient of red clay contents were prepared.The influence of red clay contents on the performance of the red limes was analyzed through physical and mechanical performance tests and freeze‑thaw cycle tests.The mechanism of action of red clay was explored by X‑ray diffraction(XRD),infrared spectroscopy(FTIR),scanning electron microscope(SEM)and other techniques.The results show that after adding red clay,the water resistance,mechanical properties and freeze‑thaw resistance of the redtime are improved.In the red lime,the pozzolanic reaction occurs in the red clay and Ca(OH)_(2),and the hydrated calcium silicate produced is filled in the pores of the red lime,with the result that the compactness of its structure is improved.With the increase of red clay content,the carbonation rate of red clay accelerates,resulting in the improvement of the early strength.

关 键 词：古建筑 红灰 火山灰反应 

分 类 号：TU526[建筑科学—建筑技术科学]