The Research Of Energy-saving Green Sintered Insulating Hollow Block Performance And Hole Optimization Design

With the rapid development of our economy,energy consumption has increased dramatically and the energy crisis has become more and more serious.National total energy consumption includes building energy consumption,traffic energy consumption and industrial energy consumption,and of the national total energy consumption,building energy consumption accounts for 33%,therefore saving building energy consumption is extremely imminent.The buildings mainly exchange for energy with the outside world through the building envelope structure,and of the energy consumption of building envelope structure,external wall accounts for about 50%.Therefore,building energy consumption can be saved from the perspective of the research of exterior wall structure — sintered insulating hollow block,reducing the heat-conducting performance of sintered insulating hollow block,so as to improve the ability of heat preservation and heat insulation wall,which has important practical guiding significance.In this paper,the performance of sintered shale insulation hollow blocks is systematically studied,the added sludge combusts and release gas in the sample high temperature roasting stage,forming a good deal of pores,which improve the heat preservation and heat insulation performance of the block.At the same time,the ANSYS finite software is used to optimally design hole structure of shale insulation hollow block,which can meet the requirements of building energy conservation hole structure,providing effective theoretical guidance for the production practice.In the paper,firstly the basic properties of the shale and sludge are tested,and the results show that the shale belongs to the liquid phase sintering,and the best sinteringtemperature of the shale is 950?;The silica and aluminum content of the sludge is low,therefore it is prepared for sintered wall materia with the shale of high silica and aluminum content.Secondly,different dosage and different moisture content sludge is added into the shale,the results show that the combination properties of the samples with 2# sludge are optimum.Then the shrinkage rate,volume density,apparent porosity and compressive strength of the sintered samples are studied in the condition of different sintering temperature and different 2# sludge content,the results show that when sintering temperature remains constant,with the increase of sludge content,apparent porosity of sintered samples shows the increasing trend,volume density and compressive strength are on the decline;when the content of sludge remains constant,with the increase of sintering temperature,apparent porosity of sintered samples decreases gradually,the volume density and the compressive strength gradually increase.When 2 # sludge content is 20% and sintering temperature is1040?,the compressive strength of the sample is 10.45 MPa,the heat conductivity coefficient is 0.3263W/(m·k),reducing by 27.68% compared with the pure shale sample.Finally,the radioactivity of sludge and sintered samples are researched,the results show that both internal irradiation index and external irradiation index are less than 1.0,meeting the standard requirements.The research results of ANSYS thermodynamic finite element simulation analysis show that: on the premise of guaranteeing block mechanical performance,increasing hole aspect ratio,hole row number,hole rib extension coefficient,rate of holes and decreasing hole column number,hole space along the direction of heat transfer can improve the heat preservation and heat insulation performance of the block.Of the six kinds of groove optimization structure,model D totally accords with the standard requirements of groove pore structure and the hole rate in the national standard GB13544-2011 ‘the sintered porous brick and block,the minimum hole rib is8 mm,bringing convenience to the production practice,in the meantime the compressive strength is relatively better;heat conductivity coefficient of the model D is 0.1508W/m·K,decreasing by 53.78% compared with heat conductivity coefficient0.3263W/m·K of the sample sintered at the optimum amount and the best temperature.