Research On The Cement Concrete Rubblization Of Construction Technology And Applicable Structural Layer

Rubblization is an old broken cement concrete pavement treatment technology，which isan important way of reconstruction. Because of its effect in anti-reflective cracking, rapidconstruction speed, little impact to environmental and traffic, it has been used widely. Atpresent, the application ofrubblization technology in China is still in early stages，qualitycontrol standards lack of theoretical basis and pertinence, in addition, except few scholars hasstudied the resilient modulus of the gravel concrete, researches on physical and mechanicalproperties of the structural layer after old cement concrete pavement rubblization, especiallythe laboratory test，isstill vacancied. The applicable structural layer after cement concretepavement rubblization—weatherapplysthe rubblization to the primary layeror thesub-baselayer; how to analysis its fatigue life and the reflective cracking when use the gravellayer as thegrass-roots, there is no research about these problems home and abroad. So, thispaper focus on the questions above.Relying on G324Luo Mei road, the rubblization of experiment sections has studied.According to the survey, the old broken cement concrete pavement had a series of damageassessment, combined with foreign engineering experiences and results of research to studythe construction technology and quality control methods of rubblization, and its physical andmechanical performance in laboratory and field test, then the MHB rubblization design andconstruction key parameters was summed up.In order to analyz the stress under vehicle load and temperature gradient, the paper buildfinite element model of rubblization concrete layer, and it was used for Structure layer’s lifeestimate and reflection crack estimate, the lower modulus recommendation in differentcondition of rubblization structure which is used as basic layer or subbase layer was given,and the applicable condition for different structure layer was given too. This study provide thebasis for the application of rubblization technology reconstruction the field of pavement layer.