Essays about: "air voids"

Showing result 1 - 5 of 12 essays containing the words air voids.

  1. 1. Developing a Test Method to Evaluate the Blackout Effect of Uncoated Curtains at Varying Angles

    University essay from Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Author : Sara Muminovic; Christina Lindén; [2023]
    Keywords : Blackout effect; blackout curtain; uncoated woven curtains; angle interval; light transmission; light box; light diffuser; microscopic image analysis;

    Abstract : This study aimed to explore the integration of varying angles in small-scale measurements and assess the light transmission performance of uncoated curtains. A total of four curtains were evaluated: blackout curtain samples 1 and 2 had a weft satin structure, while daytime curtain samples 3 and 4 consisted of a twill structure. READ MORE

  3. 2. Assessment of aggregate structure in porous asphalt using X-ray computed tomography

    University essay from KTH/Väg- och banteknik

    Author : Mari Haagenrud Matsson; Malex Love Valdemar Åkerblom; [2023]
    Keywords : Tomography; non-destructive testing; destructive testing; air voids content; aggregate size distribution; porous asphalt;

    Abstract : X-ray computed tomography is a technique that has been successfully utilized to characterize internal microstructure of asphalt mixtures. The city of Linköping (Sweden) developed an action plan to reduce noise; accordingly KTH and VTI developed a method to determine air void content in porous asphalt using x-ray computed tomography and an image processing software called ImageJ. READ MORE

  4. 3. An Ion-Selective Electrode for Detection of Ammonium in Wastewater Treatment Plants

    University essay from KTH/Kemi

    Author : Josephine Berg; [2021]
    Keywords : jonselektiv elektrod; membran; ammonium; sensor; reningsverk; ion-selective electrode ISE ; membrane; ammonium; sensor; wastewater treatment plant WWTP ;

    Abstract : Att följa ammonium i reningsverk är avgörande för att förbättra reningsprocessen och kontrollera flödet av föroreningar ut till ekosystemet. Jonselektiva elektroder (ion-selective electrodes, ISEs) är en lovande teknik inom området, där polymermembran baserade på nonactin är de mest studerade membranen för ammoniumsensorer. READ MORE

  5. 4. Investigation of Air Void Structure in Double Layer Porous asphalt based on X-ray Computed Tomography

    University essay from KTH/Byggvetenskap

    Author : Shuchen Gong; [2020]
    Keywords : Tomography; non-destructive testing; destructive testing; air voids content; porous asphalt drilled cores;

    Abstract : The X-ray computed tomography is a technology to investigate air void structure of drilled asphalt cores, which provides a non-destructive alternative to traditional laboratory methods, usually destructive testing.In this work, six in-situ specimens from a double layer porous asphalt pavement in Linköping, Sweden, were taken and analysed using both qualitative and quantitative methods of tomography. READ MORE

  6. 5. Experimental Tests of Pre - placed Aggregate Concrete for Concrete Repairs

    University essay from KTH/Betongbyggnad

    Author : Husseen Hassan; Abdifatah Sahal; [2020]
    Keywords : Shrinkage; Compressive strength; Splitting tensile strength; Freeze-thaw; resistance; Pre-placed aggregate concrete; PREPAC; Slag; Krympning; Tryckhållfasthet; Spräckhållfasthet; Frostbeständighet; Injekteringsbetong; PREPAC; Slagg;

    Abstract : Since a large part of the hydropower structures in Sweden was built in the 1950s and 1960s, many of them are slowly but surely exhibiting deterioration. The hydropower companies are facing big challenges and are consequently investing in effective repairing methods since a hydropower structure failure could pose serious consequences and dangers to people, the environment, and the community. READ MORE