Review of advanced road materials, structures, equipment, and detection technologies

As a vital and integral component of transportation infrastructure,pavement has a direct and tangible impact on socio-economic sustainability.In recent years,an influx of groundbreaking and state-of-the-art materials,structures,equipment,and detection technologies related to road engineering have continually and progressively emerged,reshaping the landscape of pavement systems.There is a pressing and growing need for a timely summarization of the current research status and a clear identification of future research directions in these advanced and evolving technologies.Therefore,Journal of Road Engineering has undertaken the significant initiative of introducing a comprehensive review paper with the overarching theme of“advanced road materials,structures,equipment,and detection technologies”.This extensive and insightful review meticulously gathers and synthesizes research findings from 39 distinguished scholars,all of whom are affiliated with 19 renowned universities or research institutions specializing in the diverse and multidimensional field of highway engineering.It covers the current state and anticipates future development directions in the four major and interconnected domains of road engineering:advanced road materials,advanced road structures and performance evaluation,advanced road construction equipment and technology,and advanced road detection and assessment technologies.

Evaluation of Multidisciplinary Collaborative Care in Patients with Acute Coronary Syndrome and Depression and/or Anxiety Disorders

Objective:To evaluate the effect of multidisciplinary collaborative care(MCC)in patients with both acute coronary syndrome(ACS)and depression and/or anxiety disorders compared with usual physician care(UPC).Methods:Depression and/or anxiety were screened by using SDS and SAS,ACS patients with depression and/or anxiety disorders were randomized into MCC and UPC groups.The cardiac outcomes and the life quality were evaluated at1year follow-up.Results:Overall,30.19%(96/318)patients had positive screen results.At1year,Cardiac outcome measures for patients in MCC group were significantly better for composite events of cardiac death and non-fatal MI(6.12% vs23.40%,p=0.016),cardiac function(NYHA functional classifi cation III or IV,0% vs 25%,p=0.05),and angina pectoris(21.28% vs 85%,p<0.0005),than patients in UPC group;the life quality were improved in patients in MCC group.Conclusion:After ACS,30.19% of patients had depression and/or anxiety disorders,MCC had better effects on cardiac outcomes and quality of life in ACS patients with Psychiatric disorders.

Investigation of internal phases of linear SBS modified bitumen at the nanoscale using AFM PF-QNM

Currently,few studies explore the internal phases of styrene-butadiene-styrene(SBS)modified bitumen at the nanoscale,though the surface phases of SBS modified bitumen have been deeply understood through a lot of research.The present study uses the atomic force microscopy(AFM)peak force quantitative nanomechanical mode(PF-QNM)to investigate the nanomechanical properties of the interior of linear SBS modified bitumen and corresponding mastics at the nanoscale.Firstly,the suitable experimental methods for the interior of bitumen and mastics are explored.Then,the phase relationship between surfaces and interiors of linear SBS modified bitumen is determined by analyzing nanomechanical properties.On this basis,in comparison with the internal phases of base bitumen,the effect of modifiers on phases is deeply investigated.Finally,the internal phases of linear SBS modified bituminous mastics are further investigated.The results reveal that the interior of linear SBS modified bitumen only has two phases,which form in a manner like periphase and paraphase on the surface.In contrast to base bitumen,linear SBS modified bitumen does not create new phases and change the properties of original phases in the interior,but affects the proportion of A-phase and B-phase and presents the homogenization.Furthermore,due to the influence of preparation methods,only the bitumen area away from the fillers can be imaged by AFM PF-QNM.It can be found that the addition of mineral fillers also slightly changes the internal phase distribution of linear SBS modified bitumen,while the effect is less than that of fillers on base bitumen.