The present work is directed towards developing a better understanding on strengths characteristics of concrete using as a partial replacement of cement by marble dust powder and sand by stone dust. The Dissertation work is carried out... more
The present work is directed towards developing a better understanding on strengths characteristics of concrete using as a partial replacement of cement by marble dust powder and sand by stone dust. The Dissertation work is carried out with M30 grade concrete for which the marble powder is replaced by 0%, 5%, 10%, 15%, 20% by weight of cement. For all the mixes compressive, flexural and split tensile strengths are determined at different days of curing apart from this the beams were casted and tested under flexural, the load and deflection are noted simultaneously and also the crack pattern were observed. In addition to this, sand is replaced with stone dust (SD) by 10%, 20% and 30% along with cement is replaced with MP by 0%, 10% and 20% by weight for M30 grades of concrete. Only 3 cubes were casted for various percentage replacements of sand with SD and cement with MP for 7days and 28 days compressive strength. The results of the present investigation indicate that marble dusts incorporation results insignificant improvements in the compressive, flexural and split tensile strengths of concrete and The load carrying capacity of RMP RCC beams {mix2 and mix3} is more compared to RCC conventional beams up to 10% of replacement and also for stone dusts and marble dust incorporation results insignificant improvements in the compressive strengths of concrete up to 20% of SD and 10% of MP of replacement.
The port of Salerno, one of the largest on the Tyrrhenian coast, was implanted in the Middle Ages west of the city. Deteriorated over time due to neglect and serious problems of cover-up afflicting the area, it was replanted after the... more
The port of Salerno, one of the largest on the Tyrrhenian coast, was implanted in the Middle Ages west of the city. Deteriorated over time due to neglect and serious problems of cover-up afflicting the area, it was replanted after the unification of Italy, creating a closed basin with the mouth turned to the east. The wrong orientation and the massive landfill phenomena supervening, led to the severe erosion of the eastern beach, on which it stood the city. In order to cope with the phenomena, in the last decades of the nineteenth and early twentieth centuries, multiple defense interventions were carried out by sheltered cliffs that filled the coast with the total metamorphosis of the coastal strip.
