Conducting experimental studies of cement concrete pavement joints

Tashkent State Transport University, Tashkent, Uzbekistan

^* Corresponding author: khojakmalaripov22@gmail.com

Abstract

To increase the life of roads in our Republic, several reforms are being carried out to operate roads with high strength and efficiently use available materials. Experience in constructing cement concrete roads shows that, over time, elevations of several millimeters can form between the slabs. The formation of disturbances hurts the longitudinal plane of the carriageway. It increases the driving resistance, makes the movement of vehicles uncomfortable, and causes the vehicles to oscillate. This increases the load on the roadway. Therefore, the study and development of recommendations for forming a shift between cement concrete paving slabs are relevant today. A study of negative changes (formation of steps) of the cement concrete pavement from dry-hot climatic conditions and over time in longitudinal, transverse compression, transverse expansion, floating, false, and working seams is presented. The results were obtained on 315320 km of highway A 380 “Guzor-Bukhara-Nukus-Beyneu” by measuring the heights and subsidence of the plates of transverse expansion joints with an electronic caliper and protractor. Using a mobile laboratory machine, “Ford Terrassa”, the longitudinal smoothness of the coating of this object was determined, and the results were obtained. Then a correlation plot of the effect of variation between plates (steps) on the smoothness of the coating (IRI) was plotted.