Search for dissertations about: "johan silfwerbrand"

Showing result 1 - 5 of 24 swedish dissertations containing the words johan silfwerbrand.

2. 1. Design of concrete pavements : design criteria for plain and lean concrete

   Author : Johan Söderqvist; Johan Silfwerbrand; Anders Lenngren; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Building engineering; Byggnadsteknik;

   Abstract : New road infrastructure projects are important and constitute of large investments that have to serve the society for a long time. The investments have to be durable at the lowest life cycle cost and the pavements have to sustain loads from increasing traffic intensity and heavy traffic loads. READ MORE

4. 2. Durability of fire exposed concrete : Experimental Studies Focusing on Sti„ffness & Transport Properties

   Author : Joakim Albrektsson; Johan Silfwerbrand; Lars Boström; Manouchehr Hassanzadeh; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Concrete; Fire; Polypropylene fibres; Durability; Tunnel; Damage assessment; Ultrasonic pulse velocity; Water absorption; Chloride migration; DIC; Byggvetenskap; Civil and Architectural Engineering;

   Abstract : Road and rail tunnels are important parts of the modern infrastructure. High strength concrete (HSC) is commonly used for tunnels and other civil engineering structures, since it allows high load carrying capacity and long service life. In general, Swedish road and rail tunnels should be designed for a service life of 120 years. READ MORE

5. 3. Continuous Preventive Bridge Maintenance : Effect of High Pressure Washing on Concrete Bridges

   Author : Louise Andersson; Johan Silfwerbrand; Anders Selander; Ylva Edwards; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Bridge maintenance; preventive maintenance; chloride ingress; high-pressure washing; Concrete Structures; Betongbyggnad;

   Abstract : In Sweden, as in many other countries, preventive maintenance of structures andbridges is considered important. It provides several benefits such as prolonged lifespan or service life, less need for repair, and hopefully reduced costs and lowerenvironmental impact.A large part of Sweden’s bridge stock is getting quite old. READ MORE

6. 4. Form pressure generated by self-compacting concrete : influence of thixotropy and structural behaviour at rest

   Author : Peter Billberg; Johan Silfwerbrand; Kamal Khayat; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; self-compacting concrete; thixotropy; structural build-up; form pressure; rheometer; viscometer; instrumented pressure tube; Building engineering; Byggnadsteknik;

   Abstract : Self-compacting concrete (SCC) offers rational and fast casting process since it merely has to be poured, or pumped, into the formwork without any compaction work needed. But this can be at the cost of high form pressure. However, reported results show that SCC can act thixotropically, i.e. READ MORE

7. 5. DEM Modelling of Unbound Granular Materials for Transport Infrastructures : On soil fabric and rockfill embankments

   Author : Ricardo de Frias Lopez; Johan Silfwerbrand; Leena Korkiala-Tanttu; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Discrete element method; granular materials; particle-scale behaviour; particle degradation; permanent deformation; resilient modulus; rockfill embankment; soil fabric; Diskreta elementmetoden; grusmaterial; verkningssätt på partikelnivå; nedbrytning; permanent deformation; styvhet; stenfylld bank; skelettstruktur; Transport Infrastructure; Transportinfrastruktur;

   Abstract : Unbound granular materials (UGM) are widely used as load-bearing layers and for embankment construction within transport infrastructures. These play a significant role on operation and maintenance of transportation systems. However, pavement and railway engineering still today rely heavily on empirical models based on macroscopic observations. READ MORE