During the process of compaction in Hot-Mix Asphalt (HMA) mixtures, the distance between aggregate particles decreases as they come together and eliminate air-voids. By measuring the inter-particle distances in a cut-section of a HMA sample the degree of compaction can be estimated. For this, a calibration curve is generated by computer simulation technique when the gradation and asphalt conten...

Soot aggregates form as open, fractal-like structures, but aged atmospheric particles are often observed to be restructured into more-compact shapes due internal mixing (“coating”). This compaction has a major effect on the radiative properties of aggregates, and may also influence their aerosol-cloud interactions, toxicity, deposition in human lungs. Recent laboratory studies have presented co...

Factors that must be considered in compaction of the soil works were the type of soil material, field control, maintenance and availability of funds. Those problems then raised the idea of how to estimate the density of the soil with a proper implementation system, fast, and economical. This study aims to estimate the compaction parameter i.e. the maximum dry unit weight (γdmax) and optimum wat...

Three-dimensional internal pore structures of various asphalt specimens with varying mix-designs and compaction levels were generated using X-ray Computed Tomography (CT) technique. Pore structure parameters were computed using image processing algorithms and estimated permeabilities using two semi-analytical equations were compared to laboratory-based vertical permeability. Furthermore, an ana...

Mechanistic pavement design procedures based on elastic layer theory require characterization of all pavement layer materials including subgrade soil. This paper discusses the subgrade stiffness obtained from a new compaction device called the Intelligent Compaction (IC) roller on highway embankment projects in Kansas. Three test sections on two routes were compacted using a single, smooth stee...

In this study, the compaction characteristics of recycled hot-mix asphalt (RHMA) were evaluated using void content (VV), energy index (CEI), slope accumulated (K), and lock point (LP). Then, effects parameters, including gradation RHMA, reclaimed pavement (RAP) content, temperature gyrations, number on RHMA investigated. An orthogonal experiment was designed data collected analyzed via range an...