STUDY OF ADHESION CHARACTERISTICS AND SURFACE INTERACTION OF BITUMEN AND FLYASH FROM POWER PLANTS
Published In: 6TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): KOZHUKHOVA NATALIA IVANOVNA , LEBEDEV MIKHAIL SERGEEVICH , LIMARENKO MIKHAIL VITALIEVICH
Abstract: Study of processes and mechanisms of realization of them in contact zone for construction composite materials is a very big problem. For fly ash (FA) based bitumen-mineral compositions studied in this paper adhesive strength between bitumen and FA particles is the base factor effected on properties of road-building material. Earlier was reported that low-calcium FA (type F) from Omsk power station (Russia) can adsorb much more content of bitumen vs. high-calcium one from Nazarovsk power station (Russia). It can be connected not only with structure as well as physical and mechanical characteristics of bitumen-mineral compositions but surface energy effect when bitumen and fly ash interaction. It is studied in this research. Adhesion between bitumen and FA particles was determined by adsorption/desorption effect of bitumen as well as energy between two contacted surfaces. It was found, that F-type FA has a quite high adsorption capacity. At the same time adsorption capacity for C-type FA
- Publication Date: 10-Dec-2017
- DOI: 10.15224/978-1-63248-139-9-22
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DYNAMIC FAILURE ANALYSIS OF CONCRETE DAMS UNDER AIR BLAST
Published In: 6TH INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): FARHOUD KALATEH
Abstract: In present study, the air blast response of the concrete dams including dam-reservoir interaction and acoustic cavitation in the reservoir is investigated. The finite element (FE) developed code are used to build three dimensional (3D) finite element models of concrete dams. A fully coupled Euler-Lagrange formulation has been adopted herein. Zhou et al, [1] model including the strain rate effect is employed to model the concrete material behavior subjected to blast loading. In addition, a onefluid cavitating model is employed for the simulation of acoustic cavitation in the fluid domain. A parametric study is conducted to evaluate the effects of the air blast loading on the response of concrete dam systems. Hence, the analyses are performed for different heights of dam and different values of the charge distance from the charge center. Numerical results revealed that (1) concrete arch dams are more vulnerable to air blast loading than concrete gravity dams; (2) reservoir has mitigation
- Publication Date: 10-Dec-2017
- DOI: 10.15224/978-1-63248-139-9-20
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- Downloads: 0