Armering för ökad produktivitet - Thomas Eriksson, Celsa Steel Service. Presenterat på Betongdagen den 17 oktober 2017 på Quality Hotel Globe i Stockholm.
FUTURECEM is a patented cement technology developed by Aalborg Portland that enables reduced clinker content in concrete compared to conventional concrete. It is based on the synergistic effect of mixing limestone and calcined clay with Portland clinker, which results in higher strength than expected. The technology was developed over multiple projects from 1990-2019 and has been introduced commercially. It can reduce the CO2 footprint of concrete by up to 27% and has been used in several construction projects in Denmark. The CALLISTE project aims to further develop FUTURECEM to meet more applications and achieve higher CO2 reduction.
This document discusses optimizing the design of road bridges to minimize environmental impact and cost. It proposes an automated design and optimization procedure that covers gaps between theoretical studies and practical application. The procedure is demonstrated for optimizing three bridge types: (1) reinforced concrete beam bridges, (2) reinforced concrete overhang bridge slabs, and (3) composite bridge decks. For each application, the procedure determines optimal structural configurations and cross-sectional dimensions to minimize investment cost and environmental impact from materials. Case studies show the optimized solutions reduce costs by 4-13% compared to traditional designs while remaining constructible. Recommendations include using more durable materials like GFRP reinforcement and minimizing reinforcement.
This document summarizes research on using 3D concrete printing to create mesostructures (structures between 10-2 to 100 m in scale) with varying density, porosity, and surface articulation. Three print patterns (A, B, C) were generated and tested. Pattern C had the lowest bulk density (1250 kg/m3) and filled the same volume with the least amount of material. While Pattern C withstood the lowest compressive load, it performed best in terms of compressive strength when accounting for its smaller cross-sectional area. Overall, the structural performance of the printed mesostructures was found to be less than half of conventionally cast concrete specimens.
D3 (A7) Oskar Linderoth - Two methods to measure sorption isotherms of cement...Svenska Betongföreningen
This document compares two methods for measuring sorption isotherms of cement-based materials: the sorption balance method and the desiccator method. The sorption balance method uses small samples (60-80 mg) and measures mass continuously during short exposure times to different relative humidity levels. The desiccator method uses larger samples (80-100 g) placed in sealed containers with saturated salt solutions and measures mass less frequently over longer exposure times (months) until equilibrium is reached. Results from the two methods on mortar samples showed differences, possibly because the sorption balance method relies on curve fitting and extrapolation that may underestimate equilibrium mass due to non-Fickian sorption behavior over long exposure times.
D2 (B4) Wolfgang Kunther - Short term chloride binding and biofouling.pdfSvenska Betongföreningen
This document summarizes research on the short-term chloride binding, biofouling, and microstructural changes of different cementitious binders exposed to the Øresund strait environment. Three binders were tested: 100% Portland cement (CEM I-100), a calcined clay and limestone blend similar to CEM II/B (CEM II/B-65), and a blend with higher clay replacement outside of CEM II/B standards (CEM II/C-56). After 28 days of exposure, the CEM I binder had more diatom growth and gastropod grazing compared to the CEM II blends. The CEM II blends showed lower chloride ingress
FUTURECEM is a patented cement technology developed by Aalborg Portland that enables reduced clinker content in concrete compared to conventional concrete. It is based on the synergistic effect of mixing limestone and calcined clay with Portland clinker, which results in higher strength than expected. The technology was developed over multiple projects from 1990-2019 and has been introduced commercially. It can reduce the CO2 footprint of concrete by up to 27% and has been used in several construction projects in Denmark. The CALLISTE project aims to further develop FUTURECEM to meet more applications and achieve higher CO2 reduction.
This document discusses optimizing the design of road bridges to minimize environmental impact and cost. It proposes an automated design and optimization procedure that covers gaps between theoretical studies and practical application. The procedure is demonstrated for optimizing three bridge types: (1) reinforced concrete beam bridges, (2) reinforced concrete overhang bridge slabs, and (3) composite bridge decks. For each application, the procedure determines optimal structural configurations and cross-sectional dimensions to minimize investment cost and environmental impact from materials. Case studies show the optimized solutions reduce costs by 4-13% compared to traditional designs while remaining constructible. Recommendations include using more durable materials like GFRP reinforcement and minimizing reinforcement.
This document summarizes research on using 3D concrete printing to create mesostructures (structures between 10-2 to 100 m in scale) with varying density, porosity, and surface articulation. Three print patterns (A, B, C) were generated and tested. Pattern C had the lowest bulk density (1250 kg/m3) and filled the same volume with the least amount of material. While Pattern C withstood the lowest compressive load, it performed best in terms of compressive strength when accounting for its smaller cross-sectional area. Overall, the structural performance of the printed mesostructures was found to be less than half of conventionally cast concrete specimens.
D3 (A7) Oskar Linderoth - Two methods to measure sorption isotherms of cement...Svenska Betongföreningen
This document compares two methods for measuring sorption isotherms of cement-based materials: the sorption balance method and the desiccator method. The sorption balance method uses small samples (60-80 mg) and measures mass continuously during short exposure times to different relative humidity levels. The desiccator method uses larger samples (80-100 g) placed in sealed containers with saturated salt solutions and measures mass less frequently over longer exposure times (months) until equilibrium is reached. Results from the two methods on mortar samples showed differences, possibly because the sorption balance method relies on curve fitting and extrapolation that may underestimate equilibrium mass due to non-Fickian sorption behavior over long exposure times.
D2 (B4) Wolfgang Kunther - Short term chloride binding and biofouling.pdfSvenska Betongföreningen
This document summarizes research on the short-term chloride binding, biofouling, and microstructural changes of different cementitious binders exposed to the Øresund strait environment. Three binders were tested: 100% Portland cement (CEM I-100), a calcined clay and limestone blend similar to CEM II/B (CEM II/B-65), and a blend with higher clay replacement outside of CEM II/B standards (CEM II/C-56). After 28 days of exposure, the CEM I binder had more diatom growth and gastropod grazing compared to the CEM II blends. The CEM II blends showed lower chloride ingress
2. Rationellt anläggningsbyggande med
platsgjuten betong
Peter Simonsson & Mats Emborg (2005)
Form
16%
Armering
15%
Betong
18%
Övrigt
51%
Kostnadsfördelning för broar byggda på
traditionellt vis.
Uppföljning av tio mindre betongbroar byggda åren 2003-2005
Form
Armering
Betong
Övrigt
Form, 37%
Form, 25%
Armering, 40%
Armering, 38%
Betong, 23%
Betong, 37%
0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50%
TID
KOSTNAD
Fördelning av tid och kostnader för
platsgjutna broar enligt intervjusvar.
Betong Armering Form
ARMERING
SPELAR ROLL!
3. Globally, labor-productivity growth in construction has averaged only 1 percent a year over the past two decades,
compared with growth of 2.8 percent for the total world economy and 3.6 percent in the case of manufacturing
4. ”Improve procurement and supply chain”
”Rethink design”
”Improve onsite execution”
REINVENTING CONCTRUCTION:
A ROUTE TO HIGHER PRODUCTIVITY
FEBRUARY 2017
MCKINSEY GLOBAL INSTITUTE
5. PÅSTÅENDE 1 Byggmaterialindustrier
Byggmaterialindustrier utvecklar produkter &
tjänster kring sina produkter!
PÅSTÅENDE 2 Produktionsmetoder
Produkt- & tjänsteval styr produktionsmetoder!
PÅSTÅENDE 3 Produktivitet & Effektivitet
Produktionsmetoder styr produktivitet &
effektivitet!
FÖRENKLING 1 P1 & P2
Byggmaterialindustrier styr möjliga
produktionsmetoder
FÖRENKLING 2 F1 & P3
Byggmaterialindustrier styr gränserna för
produktivitet och effektivitet.
Byggmaterialindustrier
styr gränserna för
produktivitet & effektivitet!
6. ”Fortfarande sker en stor del av produktionen med samma manuella
metoder som på 1970-talet med likartad produktionseffektivitet.”
28. Industrial bridge construction with cast in place concrete: new production methods and lean construction philosophies
Simonsson, Peter Luleå University of Technoclogy
KLIPPT & BOCKAT Score 21
PREFABRICERAT Score 7,4
30. Drivkrafter för produkt- och
tjänsteutveckling?
LÅNGSIKTIGA SAMARBETEN
Logistikutveckling med långsiktig
samarbetspartner..
Byggmaterialindustrier
utvecklar gränserna för
produktivitet & effektivitet!
31. i jakt på...
LÅNGSIKTIGA SAMARBETEN
• Identifiera strategiska produkter
• Långsiktiga samarbeten med
producenter av strategiska produkter
• Gemensam utvecklingsplan med
produktivitetsmål
• Involvera affärsutvecklare i
materialleverantörsrelationer
Materialproducenter,
entreprenörer & konstruktörer
sätter gränser för produktivitet,
tillsammans flyttar vi dom.
Editor's Notes
Entreprenörer och konstruktörer är människor med Know-how om hur man nytjjar tillgängligt material, system, tekniker, regelverk..