Essays about: "Ballast"

Showing result 16 - 20 of 62 essays containing the word Ballast.

  1. 16. Evaluation of air entraining behaviour in concrete using computer aided methods on hardened samples

    University essay from KTH/Betongbyggnad

    Author : Jakub Pawlowicz; [2019]
    Keywords : concrete; air voids; air entraining; AEA; blast furnace slag; BFS; flat-bed scanner; BubbleCounter; traverse method;

    Abstract : Increasing awareness of sustainability in the concrete industry forces structural design and executionto focus on avoiding costly and unpredictable maintenance action, instead paying higher attention todamage prevention by direct actions on early stages of production. One of such approaches, whichdeals with the problem of freezing and thawing deterioration, is intentional air bubble introductionto the concrete mix. READ MORE

  3. 17. Alternative methods to prevent thermal cracking in concrete

    University essay from

    Author : Alexander Barchin; Navid Sedighi; [2019]
    Keywords : Massive concrete structures; heat development; cement hydration; temperature reduction; cracking; fly ash; ice; coarse aggregates; cooling methods; practical tests.; Massiva betongkonstruktioner; värmeutveckling; cementhydrataion; temperaturreducering; sprickbildning; flygaska; is; grov ballast; kylningsmetoder praktiska försök.;

    Abstract : In the construction industry, concrete is the most common material, because of its good properties such as compressive strength and endurance. Concrete is a composition of several different materials where one of the main components is cement. When the hydration process starts, large amount of heat is generated. READ MORE

  4. 18. Analysis of Hybrid Offshore Floating Wind and Marine Power

    University essay from Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Author : Sai Varun kollappillai Murugan; [2018]
    Keywords : ;

    Abstract : Wind energy is a major part of renewable energy production. With fossil fuel depletion and climate change at the cusp, it is an absolute need to implement or evolve the current source or utilization of renewable energy. The wind has been dominating the onshore for many decades and offshore wind turbines are available at shallow depths. READ MORE

  5. 19. Train Induced Vibration Analysis of an End-frame Bridge : Numerical Analysis on Sidensjövägen

    University essay from KTH/Bro- och stålbyggnad

    Author : Niklas Wiberg; Jasmin Halilovic; [2018]
    Keywords : Accelerations; Dynamics; End-frame bridge; FE-modeling; Frequency response function; High-speed railway; Soil structure interaction; Train induced vibrations; 2D 3D;

    Abstract : Higher speeds and higher capacity will cause the Swedish rail network to be exposed to disturbing dynamic effects. Higher speeds cause higher vertical acceleration levels of the bridge deck. In this thesis, a numerical analysis of a three span end-frame bridge subjected to train induced vibrations is performed. READ MORE

  6. 20. A Comprehensive PV Systems Installation Guide and Designing a Roof-Based PV System as a Demonstration System for Troubleshooting Errors in PV systems Installations

    University essay from Högskolan Dalarna/Energiteknik

    Author : Ahmed Hathout; [2018]
    Keywords : ;

    Abstract : The purpose of the thesis was to make a comprehensive guide for PV systems installers and engineers, using the best practices and following the applicable regulations and standards for the mechanical and electrical installations of PV systems. The guide includes all the different aspects of a PV system installation including different types of roofs and mounting structures, fire safety, height safety and fall protection, installation precautions, electrical and mechanical installations, safety gears and finally system commissioning. READ MORE