Resilient modulus and California Bearing Ratio (CBR) in unbound granular materials are the key technical characteristics of layers in a flexible pavement design. Among the factors affecting these two parameters, the aggregate gradation is the most important. Using particle size distribution curve developed by AASHTO, together with other considerations mentioned in the related regulations have y...

The coefficient of thermal expansion (CTE) of a typical concrete-paving mixtures made with six different types of coarse aggregates, obtained from fifteen different sources in Wisconsin, was determined. These aggregates belonged to the basic class of glacial gravel, quartzite, granite, diabase, basalt, and dolomite. A total of fifteen different concrete mixtures were used in this study. Triplic...

This paper deals with the effect of Enset ash on mechanical property expansive soil used as a subgrade material in road construction works. To investigate influence behavior soils, laboratory tests were conducted according to AASHTO, ASTM, IS, and BS standards. The results show that belongs A-7-5 class AASHTO CH USCS. liquid limit, plasticity index, free swell ratio have decreased increasing co...

El presente artículo sintetiza el análisis de la variabilidad asociada a ensayos fatiga, realizado en tres tipos mezclas asfálticas caliente y producidas plantas Costa Rica. Los estudiados fueron: overlay (Tex-248-F), prueba curva semi-circular (SCB, ASTM D8044-16) viga sometida flexión 4 puntos (AASHTO T321-17). problema radica que existe mucha los resultados mencionados, generando dichos sea ...

Aggregate base plays an important role in a pavement structure. It supports the asphalt concrete (AC) layer and reduces the wheel load-induced stresses on the underlying layers so that the stresses transmitted to the subgrade do not result in excessive deformation. The base layer also functions as a drainage layer. Consequently, it is important to understand the drainage and strength characteri...

The seismic response of base-isolated structures is notably influenced by mechanical properties isolation devices due to their essential role in structural behavior. Consequently, the variability such should be accounted for design process. current codes prescribe a simplified approach based on analyses two extreme situations resulting from upper and lower bound bearings (upper analyses). In ca...