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Found 3 essays matching the above criteria.

  1. 1. Dispersion of cement-based grout with ultrasound and conventional laboratory dissolvers

    University essay from KTH/Byggvetenskap

    Author : Antranik Karamanoukian; [2020]
    Keywords : ultrafine cement grout; microfine cement grout; dispersion; additives; ultrasound dissolver; laboratory dissolver; ultrafint cementbruk; mikrofin cementbruk; dispergering; tillsatser; ultraljud apparat; laboratorieblandaren;

    Abstract : In any underground facilities especially tunnels, it is essential to seal the area against water ingress and leakage of reserved materials. Grouting is a common method used to seal rocks around tunnels, successful grouting reduces the duration and cost of the construction, guarantees better working environment and higher safety, minimizes the maintenance and most important decreases the corresponding environmental hazards significantly. READ MORE

  3. 2. Air under the Surface – Particulate Concentrations in a Submarine Work Environment

    University essay from Lunds universitet/Ergonomi och aerosolteknologi

    Author : Elin Önnestam; [2020]
    Keywords : Indoor air quality; Submarine; Field measurement; Ultrafine particles; Black carbon; Underwater work environments; Technology and Engineering;

    Abstract : .... READ MORE

  4. 3. Environmental Effects of Vehicle Exhausts, Global and Local Effects : A Comparison between Gasoline and Diesel

    University essay from Sektionen för ekonomi och teknik (SET)

    Author : JIE LU; [2011]
    Keywords : Vehicle exhaust; emissions; gasoline; diesel; human health;

    Abstract : Since 1970, vehicle’s exhaust pollutions have received increasing attention as a source of air pollution at both local (human health concerns) and global (global warming) scales. This study mainly discusses diesel and gasoline vehicles because, today, over 90% of vehicles on the road use gasoline and diesel fuels. READ MORE