Rodrigo Salgado

TL;DR: In this paper, the effects of vibration frequency and amplitude on the compaction density of different backfill materials (No. 4 natural sand, No. 24 stone sand and No. 43 aggregates) were studied.

TL;DR: In this article, the effects of changing the mixture composition on the maximum dry unit weight and optimum moisture content of bottom ash and Class F fly ash relevant to their utilization in highway embankment construction were investigated.

Abstract: Cone penetration in mixed or intermediate soils (soils containing mixtures of sand, silt and clay) is neither fully drained nor fully undrained at the standard cone penetration rate of 20 mm/s. Considerable research, mainly relying on centrifuge tests, has been undertaken to quantify the effects of penetration rate (and thus partial drainage) on cone resistance. In this paper, the effects of penetration rate on cone resistance in saturated clayey soils were investigated by performing field tests and miniature cone penetration tests in a calibration chamber. The field tests were performed at sites especially selected to span the range of drainage conditions from fully drained to fully undrained. The calibration chamber tests, using both conical and flat-tip penetrometers, were performed at different penetration rates in two specimens prepared by mixing kaolin clay and sand with different mixing ratios and one-dimensionally consolidateding the mixtures. A correlation between cone resistance and drainage conditions is established based on the cone penetration test results. The transitions from no drainage to partial drainage and from partial drainage to full drainage are defined as a function of penetration rate normalized with respect to the penetrometer diameter and the coefficient of consolidation.

TL;DR: In this article, a fully integrated pile driving control system (PDCS) prototype was developed that collects, processes, and analyzes dynamic data, which can estimate the capacity of a single pile using existing dynamic methods, e.g., the Case method or through the pile driving formulae developed at Purdue University.

TL;DR: In this article, the mechanical properties of fly and bottom ash mixtures were evaluated for evaluation of strength, stiffness, and compressibility in a utility power plant in Indiana, U.S. and the results showed that overall, the results compared favorably with conventional granular materials.