Sökning: "Fibre reinforced shotcrete"

Hittade 5 uppsatser innehållade orden Fibre reinforced shotcrete.

  1. 1. Environmental and technical evaluation of cement reduction and test methods for fibre reinforced shotcrete in tunnels

    Master-uppsats, KTH/Betongbyggnad

    Författare :Elin Brodd; Lina Östlund; [2022]
    Nyckelord :Shotcrete; Global Warming Potential; Environmental Product Declaration; Tunnel construction; Fibre reinforcement; Compressive strength; Residual strength; GGBS; Sprutbetong; Klimatpåverkan; Miljövarudeklaration; Tunnelbyggande; Fiberarmering; Tryckhållfasthet; Residualhållfasthet; Granulerad Masugnsslagg;

    Sammanfattning : The dominating support method for hard rock tunnels today is use of fibre reinforced shotcrete in combination with rock bolts. The fibre reinforced shotcrete secures smaller blocks, while rock bolts are used to support larger blocks in the rock. Application of shotcrete is done by spraying against the rock surface using compressed air. LÄS MER

  3. 2. EVALUATION OF ENVIRONMENTAL AND TECHNICAL PERFORMANCE OF ALTERNATE FIBRES FOR SHOTCRETE IN TUNNELS

    Master-uppsats, KTH/Betongbyggnad

    Författare :Shilpa Anand; [2022]
    Nyckelord :Shotcrete; Life cycle assessment; Environmental Product Declaration; Global warming potential; steel; basalt and synthetic fibres; flexural strength; energy absorption.;

    Sammanfattning : Tunnels in hard and jointed rock are normally excavated in an arch shape to enable the rock mass to support its weight. Since the beginning of the 1980's, fibre reinforced shotcrete (FRS) in combination with rock bolts have been the dominating support method for hard rock tunnels. LÄS MER

  4. 3. Environmental and technical evaluation of cement reduction and test methods for fibre reinforced shotcrete in tunnels

    Master-uppsats, KTH/Betongbyggnad

    Författare :Elin Brodd; Lina Östlund; [2022]
    Nyckelord :;

    Sammanfattning : The dominating support method for hard rock tunnels today is use of fibre reinforcedshotcrete in combination with rock bolts. The fibre reinforced shotcretesecures smaller blocks, while rock bolts are used to support larger blocks in therock. Application of shotcrete is done by spraying against the rock surface usingcompressed air. LÄS MER

  5. 4. Laboratory testing of shotcrete with fibres of steel, basalt or synthetic materials

    Master-uppsats, KTH/Betongbyggnad

    Författare :Muralidharan Rengarajan; [2020]
    Nyckelord :Fibre reinforced shotcrete; Energy absorption; Residual strength; Fibres; and Laboratory testing;

    Sammanfattning : Shotcrete or sprayed concrete has become an inevitable material for stabilising and supporting hard rock tunnels. To prevent rock block fallouts in the excavated tunnel, shotcrete is pneumatically projected under high pressure on the rock surface. LÄS MER

  7. 5. Punching Shear Capacity of Fibre Reinforced Concrete Slabs with Conventional Reinforcement : Computational analysis of punching models

    Master-uppsats, KTH/Bro- och stålbyggnad

    Författare :Zeinab Tazaly; [2012]
    Nyckelord :Steel fibre reinforced concrete slab; punching capacity; concrete test; residual tensile strength; DAfStB; Swedish Concrete Association; conventional reinforcement;

    Sammanfattning : Steel fibre reinforced concrete is not a novel concept, it has been around since the mid-1900s, but despite its great success in shotcrete-reinforced rock walls and industrial floors it has not made any impact on either beams or elevated slab. Apparently, the absence of standards is the main reason. LÄS MER