Potential Use of Foamed Mortar (FM) for Thermal Upgrading of Chinese Traditional Hui-Style Residences

The Hui-style residence is an important architectural heritage of China. The hollow wall structures are widely used to build its exterior wall system. However, the thermal performance of the hollow wall is no longer able to meet the new energy-saving and environmental requirement. This article describes a laboratory study of the development of foamed mortar (FM), with the potential for use in thermal upgrading of the Hui-style hollow wall system without dramatically changing its traditional structure. The key early age, physical, mechanical and thermal properties were systematically measured. Two extended models were respectively developed to calculate compressive strength and thermal conductivity, as a function of porosity. Environment chamber test was also employed to investigate the effectiveness of this novel thermal upgrading approach and the results show that filling the voids with FM can effectively improve the overall thermal resistance of the hollow wall system by 44%, which is almost equal to the overall thermal resistance when using the more expensive commercial inorganic stucco system. In addition, the combination of these two methods yielded an overall thermal resistance of 0.701 m²·K/W, which is even higher than 0.67 m²·K/W for the code required in the hot summer/cold winter climate zone.     

浅谈“村村通”地面站小片网络的建立与日常维护

建立地面接收站,建成小型电视传输网,是完成“村村通”工程的有效方法之一。有线传输网一旦建立,故障在所难觅,因为网络上使用了大量的有源器件,故障率相对较高。因此日常排查与维护至关重要,这样可大大降低故障率。     

清代南部县衙档案及其价值

南部县位于四川省东北重镇南充市的中部,解放时县军管会曾从旧政权手中接收过一批旧材料,1960年南充地委档案科派员检查时从中发现了清代南部县衙档案.1984年10月南充市档案局受命对此进行整理,6位工作人员历时6年,整理出南部县衙档案18070卷,约10馀万件.为便于管理利用,分装为1873盒,并编出23本目录.2004年开始,南充市档案馆按清史编撰委员会的要求重新著录,到2007年5月,统计档案约18000卷,7万9千馀件.兹对其基本状况及价值予以介绍.     

相交半生该有文——我所认识的轩锡明

1971年秋至1972年春,我在海南藏族自治州师资培训班跟轩锡明同桌,从此认识他. 我对轩锡明最初的印象是:清瘦笔挺的高个子,不多言语,走路昂首挺胸,目不斜视.这种印象凸显一个人的性格,正好暗合了以后我对他的认识:认定自己走的路,照直朝前,坚韧,顽强,不受世人左右.     

初议历史地理环境中晋商的兴衰

在特殊的历史地理环境中,根植于中国封建社会传统农业经济和文化的山西商业,封建社会的前期,在历代"重农抑商"的政策下,商业发展缓慢,封建社会的中后期,全国战乱不断,山西首当其冲,传统农业经济和文化的不断衰落,促使与传统观念相悖的"重商"思想开始抬头,山西的商业经济不断兴盛,晋商文化逐渐形成,近代以后,由于山西商业自身的封建落后,难于对抗外来经济和文化的冲击,迅速步入衰落。     

《汝帖》评价及相关诸问题

《汝帖》十二卷,目录一卷,北宋王案辑并刻于大观三年(1109)。该帖收录历代各家法书,自苍颉《戊己帖》至五代郭忠恕《尧舜帖》止,计77家又作者不明法书23种。