Study On The Factors Affecting The Performance Of Full Iightweight Aggregate Concrete For The Ground Floor Insulation Engineering

The building energy consumption accounts for about1/3of the total energyconsumption of society, the energy consumption of building energy consumption is notonly the construction process, but also the energy consumption as a whole life period,air conditioning, heating and lighting. Therefore, building energy-saving technology hasbecome an important means to reduce the overall energy consumption.Energy saving standards in Chongqing province has been the implementation ofnational65%, and Chongqing is a region of hot summer and cold winter, in addition toa number of office buildings, there is no uniform cooling, heating system, but the use ofhousehold heating, refrigeration in residential buildings. Residents have different indoortemperature requirements,so the energy transfer, not only in the indoor and outdoor, butalso pass through floor. In order to reach65%of the energy-saving standards, it shouldnot only do the wall heat preservation system, but also to do the floor insulation system.The Chongqing area has been large-scale application full lightweight aggregateconcrete on the floor holding. Because of ceramsite is porous structure, small densitythan water, the full lightweight concrete workability is poor,aggregate easy to float upand the concrete bleeding. Aiming at these problems, we optimize the mixproportion,and add additives to improve. This experiment mainly studied the influenceof performance of ceramisite, sand ratio, X beads, fly ash cenosphere, cellulose ether,effect of water reducing agent on the strength, dry density, and the workability of thefull lightweight aggregate concrete.Research results show that the influence of the properties of aggregate on thestrength of full lightweight aggregate concrete is obvious, ceramisite strength increased0.8MPa,3-4times the strength of concrete increased. In the same sand ratio, sameslump circumstances, the strength of spherical ceramsite concrete is higher than that ofgravel ceramisite. The strength and dry density of full lightweight aggregate concretechange similarity as sand percentage changing, were first increased and then deceased.Lighter and higher strength fine aggregate sucn as X beads, fly ash cenosphere, canreduce the density of full lightweight aggregate concrete significantly,and which canimprove the strength in a certain content.Ceramic immersion is unfavorable to strength of full lightweight aggregateconcrete, and wrapped slurry process has no effect. Naphthalene superplasticizer has noapparent effect to full lightweight aggregate concrete, while poly carboxylic acid waterreducing agent can improve the strength significantly, but due to the decrease of waterbinder ratio, the dry density increased, the suitable dosage is0.7%-1.2%of cement content. To improve the grade of cement, which improve the strength of cement grout,the strength of full lightweight aggregate concrete increases little.HPMC can significantly improve the workability of full lightweight aggregate,the best mixing amount is about0.2%for spherical ceramsite concrete, and0.4%forgravel ceramisite concrete.The research findings have been applied in practical engineering, the overallresults were satisfactory, no hollowing and cracking.