IMPACT OF WATER HYACINTH ON PROPERTIES OF CONCRETE MADE WITH VARIOUS GRAVEL TO DOLOMITE RATIOS
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND MECHANICAL ENGINEERING
Author(s): AHMED SHABAN ABDEL HAY , YASSER ABDEL GHANY FAWZY
Abstract: Water hyacinth(W-H) has an adverse effect on Nile river in Egypt , it absorb a high quantities of water, it is need to serve the quantities arrived ( 55500 million m3) especially in this time, so by burning W-H it can used in concrete mix to reduce the permeability of concrete. In this study, the effect of W-H on concrete properties ( fresh- hardened) were studied, slump of concrete as a fresh properties, compressive strength, splitting tensile strength as mechanical properties, mass transport by Isat , microstructure by XRD and thermal gravimetric analysis (TGA). This paper presents a study on the properties of concrete prepared with two aggregate types, namely gravel and dolomite. Various concrete mixes made with gravel and dolomite which blended with proportions 1:0,0:1,1:1,1:2 and 2:1, respectively with different W-H ratios of 0,0.5,1.0 ,2.0 and 5.0% by mass of cement at w∕c 0.50 for different mixes. The results showed that mechanical properties of concrete developed at 2% W-H for
- Publication Date: 27-May-2015
- DOI: 10.15224/978-1-63248-062-0-59
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ACOUSTIC DETECTION UTILITY FOR PUMP DESIGN AND MANAGEMENT
Published In: 3RD INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND MECHANICAL ENGINEERING
Author(s): C. CIARAVINO , G. CIARAVINO
Abstract: The cavitation phenomenon determines a decrease in performance levels of hydraulic machinery together with a distinctive noise in the fluid flow. The analysis conducted on the basis of acoustic and visual measurements show that the classical method for identification of cavitation inception, based on a fall in the pump head, is not very reliable. In particular the acoustic measurement makes it possible to detect cavitation at its onset under the most potentially damaging conditions namely high values of flow rate and NPSH. Moreover the acoustic method (characterized by non intrusive technology) also makes it possible to detect different nuclei of cavitation in the pump under the same operating conditions. These characteristics of the acoustic method are of particular interest to the manufacturers of hydraulic machinery as well as to the managers of pumping systems.
- Publication Date: 27-May-2015
- DOI: 10.15224/978-1-63248-062-0-60
- Views: 0
- Downloads: 0