0000000001045777
AUTHOR
Ingrid Lande
Standardisering av brokonstruksjoner for nasjonale hovedveier
Masteroppgave bygg BYG500 - Universitetet i Agder 2017 Standardization is currently not being utilized much in the Norwegian road building industry compared to the rest of the construction industry and road construction abroad. To harvest the potential benefits, it is interesting to determine how to increase the use of standardization in road building. The aim of this master’s thesis is to determine how to make use of standardized concrete bridges for the construction of new national highways. To investigate this, the thesis has established knowledge on today’s situation and found dominant obstacles towards a more widespread use of standardized bridge solutions. The Norwegian Public Roads A…
Locally Produced UHPC: The Influence of Type and Content of Steel Fibres
Abstract Ultra-high performance concrete might be a competitive alternative to normal concrete for some purposes. But despite research efforts during decades, utilisation is still not widespread. Reasons include limited competence and material availability. This paper presents one step of a research initiative aimed at facilitating the use of UHPC in Norway. The step presented here comprises the accumulated results from investigations on the influence steel fibres (content, type, and hybrid combination) have on material strength and deformation behaviour of locally produced UHPC, made with constituents found in southern Norway. 231 specimens were tested, spanning nine UHPC mixes. Digital Im…
Approaches and strategy development towards more sustainable ultra-high-performance concrete
The main research objective of this thesis is to investigate how the use of UHPC can contribute to improving the sustainability of the concrete industry by investigating alternative approaches and develop a comprehensive strategy. Some cost aspects have been discussed to indicate whether the strategy is commercially viable. The research involved six studies: Paper I describes a background study to identify directions for a more sustainable concrete industry. Papers II–V report on how approaches to improve sustainability influence the mechanical properties of UHPC. These studies include both literature reviews and experimental activities. Paper VI concludes the research by developing a compr…
Towards Efficient Use of Cement in Ultra High Performance Concrete
Abstract This paper presents an investigation on substituting the cement content with an inert material, in a typical locally produced UHPC mix. A structured literature review was performed to enrichen the discussion and to benchmark the results towards already reported investigations in the research society. Investigations on cement substitution in UHPC are frequently reported. However, usually the cement is substituted with other binding materials – often pozzolanic by-products from other industries. Reports from investigations on the use of inert materials for cement substitution in UHPC seem scarce. An experimental program that included a total of 210 test specimens was executed. This p…
Lowering environmental impact from UHPC, utilizing industrial by-products
Ultra High Performance Concrete (UHPC) is a material having some properties superior to ordinary concrete, such as strength and durability. Production ofUHPC often includes large amount of cement, leading to high cost and environmental footprint. This study aimed at demonstrating the potential of reducing both cost and environmental impact from production of UHPC, by reducing cement content through substitution with inert materials. Locally available industrial by-products were utilized as ag-gregates, as another mean to reduce cost and environmental impact. It has been proven possible to substitute 40% of the cement with inert materials, without significantly reducing the compressive stren…