Study On Temperature Effect And Temperature Stress Of No-fines Porous Cement Concrete Pavement

Porous cement concrete as a new type of environmentally friendly eco-concrete getmuch attention, given its unique skeleton gap structure it is permeable, ventilation, noisereduction and excellent way to use the service performance. In-depth study of porous cementconcrete pavement temperature stress and kerf spacing has a very important engineering andenvironmental significance.In this thesis, with the no-sand porous cement concrete mix design basis of theoreticalstudy, based on vibratory compaction with the design method, and porous concrete flexuraland compressive strength of test validation. By introducing common sense of thermal physics,describes the heat with the surrounding environment of the road surface for heat exchange inseveral ways. To find out the road surface temperature variation, this paper set four factorstest combination which is the thickness, watering, ventilation and coarse aggregate size, andused of the data collection instrument were collected the internal temperature data of thecoarse aggregate and concrete with the environmental changes then analyzed the mechanismof action and extent of each factor. In addition, according to the instantaneous value of solarradiation, temperature values and experimental data, established the road surface temperatureforecast numerical model.Concrete internal temperature change will seriously affect the size of the temperaturestress, the use of thermal stress calculation method of cement concrete pavement designspecification and analysis of porous cement concrete with plain cement concrete pavementtemperature gradient plate length the effects of temperature stress To compare, at last, throughthe porous cement concrete pavement temperature stress research to analysis and determineits length between joints.