The energy efficiency design of the exterior wall in the buildings of the hot summer and cold winter zone of China should consider the heat prevention in summer and the heat insulation in winter. The self-insulation o...The energy efficiency design of the exterior wall in the buildings of the hot summer and cold winter zone of China should consider the heat prevention in summer and the heat insulation in winter. The self-insulation of the exterior?wall is a more feasible design to satisfy the energy efficiency of buildings in the?zone. However, the systematic research is urgently needed for the self-insulation of the exterior wall in the hot summer and cold winter zone of China. The paper tested the thermal performance of the common non-clay materials such as shale sintered hollow brick, sand autoclaved aerated concrete block, etc. by means of indoor experiments. The energy efficiency effect of the common materials was verified using dynamic calculation soft PKPM and several constitutions of exterior wall with different main bricks and insulation materials on the heat bridge were simulated, too. Besides, the tests of the thermal performance of exterior wall in real constructions were carried out to testify the practical effect of the recommended constitutions of exterior wall with different main bricks and insulation materials on the heat bridge. The conclusions are: the physical and thermal properties of the six non-clay wall material are better than the clay porous brick;the thermal performance of the non-clay brick can be improved obviously through the rational arrangement of the holes;shale sintered hollow brick after increasing the holes and rationalizing the hole arrangement and sand autoclaved aerated concrete block are recommended for buildings in the hot summer and cold winter area of China. The dynamic calculation results show that the thermal performances?of the non-clay materials are all satisfied with the energy efficiency;The heat transfer coefficient of the exterior wall with composition?③,?in which?the main wall was sand autoclaved aerated concrete block and the material on the heat bridge was sand autoclaved aerated concrete plate, is the smallest among the three recommended compositions.展开更多
目的研究温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂微渗漏的影响,为临床选择较理想的流体树脂提供参考。方法选取因正畸拔除的成人离体前磨牙60颗,随机分为10组(n=12),根...目的研究温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂微渗漏的影响,为临床选择较理想的流体树脂提供参考。方法选取因正畸拔除的成人离体前磨牙60颗,随机分为10组(n=12),根据是否经过冷热循环老化实验,分为F00A组、Z350A组、SDRA组、TetricA组、ConsticA组,F00B组、Z350B组、SDRB组、TetricB组、ConsticB组,共10组。每颗离体牙咬合面预备成宽2 mm、长4 mm、深2 mm的Ⅰ类洞,分别用所属组别流体树脂充填,A组试件亚甲基蓝染色实验,B组试件先进行5000次冷热循环老化实验后再进行亚甲基蓝染色实验,之后将所有试件牙冠部沿颊舌(腭)方向平行于牙体长轴纵向剖开,体视显微镜下观察各组微渗漏情况,记录数据并分析。结果①F00A组、Z350A组、SDRA组、TetricA组、ConsticA组5组微渗漏的差异并没有统计学意义(P>0.05)。②SDRB组、TetricB组的微渗漏程度大于F00B组、Z350B组,差异具有统计学意义(P<0.05)。③温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂之间的微渗漏程度影响有显著差异(P<0.05)。结论①未经过冷热循环老化实验时,Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂的即刻微渗漏程度无明显差异。②经过冷热循环老化实验后,SDR流体树脂、Tetric^(®)N⁃Flow流体树脂微渗漏程度较高,边缘密合性不佳;Beautifil Flow Plus F00流体树脂、Filtek^(TM)Z350 XT流体树脂微渗漏程度较低,边缘密合性较优。③冷热循环老化实验加重了Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂的微渗漏程度。展开更多
文摘The energy efficiency design of the exterior wall in the buildings of the hot summer and cold winter zone of China should consider the heat prevention in summer and the heat insulation in winter. The self-insulation of the exterior?wall is a more feasible design to satisfy the energy efficiency of buildings in the?zone. However, the systematic research is urgently needed for the self-insulation of the exterior wall in the hot summer and cold winter zone of China. The paper tested the thermal performance of the common non-clay materials such as shale sintered hollow brick, sand autoclaved aerated concrete block, etc. by means of indoor experiments. The energy efficiency effect of the common materials was verified using dynamic calculation soft PKPM and several constitutions of exterior wall with different main bricks and insulation materials on the heat bridge were simulated, too. Besides, the tests of the thermal performance of exterior wall in real constructions were carried out to testify the practical effect of the recommended constitutions of exterior wall with different main bricks and insulation materials on the heat bridge. The conclusions are: the physical and thermal properties of the six non-clay wall material are better than the clay porous brick;the thermal performance of the non-clay brick can be improved obviously through the rational arrangement of the holes;shale sintered hollow brick after increasing the holes and rationalizing the hole arrangement and sand autoclaved aerated concrete block are recommended for buildings in the hot summer and cold winter area of China. The dynamic calculation results show that the thermal performances?of the non-clay materials are all satisfied with the energy efficiency;The heat transfer coefficient of the exterior wall with composition?③,?in which?the main wall was sand autoclaved aerated concrete block and the material on the heat bridge was sand autoclaved aerated concrete plate, is the smallest among the three recommended compositions.
文摘目的研究温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂微渗漏的影响,为临床选择较理想的流体树脂提供参考。方法选取因正畸拔除的成人离体前磨牙60颗,随机分为10组(n=12),根据是否经过冷热循环老化实验,分为F00A组、Z350A组、SDRA组、TetricA组、ConsticA组,F00B组、Z350B组、SDRB组、TetricB组、ConsticB组,共10组。每颗离体牙咬合面预备成宽2 mm、长4 mm、深2 mm的Ⅰ类洞,分别用所属组别流体树脂充填,A组试件亚甲基蓝染色实验,B组试件先进行5000次冷热循环老化实验后再进行亚甲基蓝染色实验,之后将所有试件牙冠部沿颊舌(腭)方向平行于牙体长轴纵向剖开,体视显微镜下观察各组微渗漏情况,记录数据并分析。结果①F00A组、Z350A组、SDRA组、TetricA组、ConsticA组5组微渗漏的差异并没有统计学意义(P>0.05)。②SDRB组、TetricB组的微渗漏程度大于F00B组、Z350B组,差异具有统计学意义(P<0.05)。③温度对Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂之间的微渗漏程度影响有显著差异(P<0.05)。结论①未经过冷热循环老化实验时,Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂的即刻微渗漏程度无明显差异。②经过冷热循环老化实验后,SDR流体树脂、Tetric^(®)N⁃Flow流体树脂微渗漏程度较高,边缘密合性不佳;Beautifil Flow Plus F00流体树脂、Filtek^(TM)Z350 XT流体树脂微渗漏程度较低,边缘密合性较优。③冷热循环老化实验加重了Beautifil Flow Plus F00、Filtek^(TM)Z350 XT、SDR、Tetric^(®)N⁃Flow、Constic这5种流体树脂的微渗漏程度。
