元上都穆清阁夯土墙体材料特性研究

Research on Rammed Earth's Material Performance of Muqingge,Yuan Shang Du

元上都穆清阁夯土墙体采用灰黑色含腐殖质的砂土与黄褐色砂土分层夯筑而成,为了分析两层夯土风化差异的形成原因,对夯土的物理特性、成分及热力学性能通过室内试验和现场测试进行研究,结果表明:两层夯土的性能略有差异,灰黑色夯土粉粒含量稍多,密度稍低,孔隙率稍大,粗颗粒含量稍低,矿物成分以石英为主,黄褐色夯土含有较多钾长石和钠长石;黄褐色夯土导热系数稍低,呈现升温和降温速率小的特征,与现场调查抗风化能力强相适应。此研究结果为病害成因分析和后期保护加固提供了科学依据。

Two different materials were used as rammed earth to construct Muqingge,Yuan Shang Du,black sandy soil with humus contained and tawny sandy soil.In-door experiments and in-situ tests were conducted to reveal the performance of these two materials.Result indicated that there exist some slight differences between these materials.Black sandy soil contains more silts than larger particles and owns lower density and higher porosity,compared with tawny sandy soil.Besides,the mineral composition of black sandy soil is dominated by quartz.While,the main mineral composition of tawny sandy soil are mainly albite and potassium feldspar.Tawny sandy soil has relatively lower thermal conductivity,which leads to its better resist-weathering ability.The results provide scientific basis for deterioration investigation and conservation and preservation.