Sökning: "air voids content"

Visar resultat 1 - 5 av 6 uppsatser innehållade orden air voids content.

  1. 1. Vibrationspåverkan på färsk betongs hållfasthet : En studie av vibrationens inverkan på färsk betong och dess effekt på hållfastheten i det härdade stadiet.

    Uppsats för yrkesexamina på grundnivå, Karlstads universitet

    Författare :Abdulahi Ukash Sugow; [2023]
    Nyckelord :Betong; vibrering; vibrationspåverkan;

    Sammanfattning : Concrete is a durable and long-lasting material that plays an important role in many areas of application such as infrastructure and housing. In order for the fresh concrete to have good stability and meet the desired strength and durability requirements, it needs to be well processed so that it fills the form and encloses the reinforcement well. LÄS MER

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

    Master-uppsats, KTH/Väg- och banteknik

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

    Sammanfattning : 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. LÄS MER

  4. 3. Fallvänlig asfalt för gång- och cykelbana - En studie kring inverkan av tid, gummiinblandning och lagringsförhållande på hållfastheten

    Uppsats för yrkesexamina på grundnivå, Lunds universitet/Trafik och väg

    Författare :Ashraf Al Saidi; Ghulam Murtaza Begzad; [2021]
    Nyckelord :Gång- och cykelbanor; gummiasfalt; modifiering; gummigranulat; bitumen; Marshallstabilitet; hållrumshalt.; Technology and Engineering;

    Sammanfattning : Det svenska cykelvägnätet utgörs av cirka 22 800 km väg. Dessa är fördelade på statliga cykelvägar (cirka 2800 km eller 12,29 procent), kommunala cykelvägar (cirka 18 900 km eller 82,89 procent) och enskilda cykelvägar (cirka 1100 km eller 4,82 procent). LÄS MER

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

    Master-uppsats, KTH/Byggvetenskap

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

    Sammanfattning : 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. LÄS MER

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

    Master-uppsats, KTH/Betongbyggnad

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

    Sammanfattning : 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. LÄS MER