1,721,285 research outputs found
Outline, setting the scene & degradation due to inappropriate design and errors during casting
Full text linkProceedings of the DuRSAAM 2023 Symposium on Advancing Alkali-Activated Materials
No full textThe DuRSAAM 2023 Symposium celebrates the end of an exciting and successful EU-project, titled ‘PhD Training Network on Durable, Reliable and Sustainable Structures with Alkali-Activated Materials (DuRSAAM)’ and coordinated by Ghent University. In line with the scope of this European project, that has run from 2018 till 2023, the DuRSAAM2023 Symposium focusses on new developments in all aspects of alkali-activated concrete, sometimes also referred to as geopolymer concrete. These open access proceedings collect the short papers, as presented by the participants during the symposium, and provides researchers, building professionals and stakeholders recent insights on advancing alkali-activated materials
Introduction to durability, sustainability and life cycle assessment of concrete structures - Lecture notes of the DuRSAAM training course held September 2020
No full textThis e-book has been made in the framework of the European Training Network on Durable, Reliable and Sustainable Structures with Alkali-Activated Materials (DuRSAAM), which organized an online training course on 14 till 17 September 2020 about durability, sustainability and life cycle assessment of concrete structures. This open source book collects the lecture notes by the teachers of this training course and provides researchers, building professionals and stakeholders basic insights on the sustainability aspects of concrete structures, having eco-friendly concretes in mind as emerging building technology
Influence of curing conditions on alkali-activated mortars intended for concrete repair
No full textRepair mortars are costly materials with high level of Portland cement and various additives which questions their eco-efficiency. In this respect, cement free material solutions such as alkali-activated mortars based on ground granulated blast furnace slag (BFS) are gaining interest for structural repair. The aim of this research is to study blast furnace slag as a precursor for producing ambient cured alkali-activated repair mortars. To achieve this purpose, a total of four mixtures were prepared using four different molar ratios of the silicate solution. The fresh and hardened properties of the produced mortars including flow retention, dry density, compressive and flexural strength are studied comparing ambient-cured and sealedcured specimens. Furthermore, the tensile bond strength between the repair mortars and a grit blasted concrete substrate was verified (after 7 days sealed + 21 days ambient curing). The results demonstrate, for the tested configurations, the feasibility of the alkali-activated repair mortar, including a good adherence. Given the limited scope of the tests, more work is needed to confirm the observations further
CFRP to concrete bond at elevated service temperatures and modelling of CFRP strengthened reinforced concrete beams subjected to fire
No full textBond behaviour and tension stiffening of flat stainless steel rebars with continuous or alternate rib pattern embedded in concrete
Full text linkEvaluation and optimization of the fire safety of concrete elements strengthened with NSM reinforcement
Full text linkDesign models for the shear strength of prestressed precast steel fibre reinforced concrete girders
Full text linkOm het productieproces van geprefabriceerde voorgespannen betonnen liggers verder te kunnen optimaliseren, is in samenwerking met Megaton (onderdeel van de Willy Naessens groep) de mogelijkheid onderzocht om traditionele dwarskrachtwapening onder de vorm van beugels gedeeltelijk of volledig te vervangen door het gebruik van staalvezelbeton.
In het kader van dit onderzoek is op verschillende niveaus het materiaal staalvezelbeton onderzocht. Deze niveaus kunnen als volgt gedefinieerd worden:
a) de individuele vezel, waarbij onderzocht is hoe een vezel verankerd zit in het beton,
b) het vezelbeton composiet, waarbij onderzocht is hoe alle staalvezels die een scheur in beton overbruggen bijdragen tot de nascheurtreksterkte van staalvezelbeton en
c) het structureel element, waarbij is nagegaan in welke mate staalvezelbeton kan gebruikt worden als alternatief voor traditionele dwarskrachtwapening.
Op al deze onderzoeksniveaus zijn zowel experimenten uitgevoerd in het labo als analytische en numerieke modellen ontwikkeld. Finaal heeft het onderzoek geleid tot de ontwikkeling van een rekenmodel dat ingenieurs in staat stelt om de dwarskrachtcapaciteit van liggers uit staalvezelbeton te ontwerpen
The Urban Concrete Innovation
No full textThis book is the joint and highly acknowledged effort of members of EU-projects URBCON and DuRSAAM. Basic insights and more detailed information are provided on eco-friendly concrete targeting to be free of traditional Portland cement and targeting to be free of primary resourced construction minerals, so to avoid using Earths primary minerals, lower CO2 impact and keep excellent technical performance. Examples of concrete compositions are provided, application and tendering aspects are discussed, practical applications are described by means of some historical and recent cases, … and many more. This e-handbook can help you to become actively involved into a more sustainable built environment.This open access e-handbook is the joint effort of the EU-projects URBCON and DuRSAAM
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