Life cycle assessment (LCA) of ultra high performance concrete (UHPC) structures

Stengel, Thorsten; Schießl, P

doi:10.1533/9780857097729.3.528

Cited by 51 publications

(34 citation statements)

References 3 publications

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“…However, there is still potential to improve this method even further and make it more sustainable, focusing on the environmental cost of clinker and fibrous mixes used to achieve a robust strain hardening response. Considering the fact that more than 95% of the environmental impact (GWP and embodied energy) of current UHPFRC is from the steel fibers and clinker contributions (48% and 47%, respectively for GWP) [14,15], replacing the steel fibers with synthetic ones while also replacing clinker with Supplementary Cementitious Materials (SCM), can significantly reduce the environmental costs of this material.…”

Section: Introductionmentioning

confidence: 99%

Life Cycle Analysis of Strengthening Existing RC Structures with R-PE-UHPFRC

Hajiesmaeili,

Pittau,

Denarié

et al. 2019

Sustainability

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(PE)-UHPFRC, a novel strain hardening ultra high-performance fiber reinforced concrete (UHPFRC) with low clinker content, using Ultra-High Molecular Weight Polyethylene (UHMW-PE) fibers, was developed for structural applications of rehabilitation. A comprehensive life cycle assessment (LCA) was carried out to study the environmental impact of interventions on an existing bridge using PE-UHPFRC compared with conventional UHPFRC and post-tensioned reinforced concrete methods in three categories of global warming potential (GWP), cumulative energy demand (CED), and ecological scarcity (UBP). The results showed 55% and 29% decreases in the environmental impact of the PE-UHPFRC compared with reinforced concrete and conventional UHPFRC methods, respectively, which highlighted the effectiveness of this material for the rehabilitation/strengthening of structures from the viewpoint of environmental impact.

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Section: Introductionmentioning

confidence: 99%

Life Cycle Analysis of Strengthening Existing RC Structures with R-PE-UHPFRC

Hajiesmaeili,

Pittau,

Denarié

et al. 2019

Sustainability

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“…Noting that advanced cement-based materials with high durability typically have higher environmental impacts to produce [56], the desired service-period and longevity in-use could be a driving factor in understanding if these improved durability properties outweigh benefits from using low environmental impact strategies to produce mixtures. Figure 5 shows a schematic representing this concept with GHG emissions of one cubic meter of concrete analyzed as a function of time, where the materials were assumed to have no impacts from maintenance and are replaced when they have reached a service-limit state.…”

Section: Discussionmentioning

confidence: 99%

The role of cement service-life on the efficient use of resources

Miller

2020

Environ. Res. Lett.

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The high demand for cement-based materials to support building and infrastructure systems is of growing concern as the production of cement leads to significant greenhouse gas (GHG) emissions and notable resource demand. While improved efficiency of cement use has been proposed as a means to mitigate these burdens, the effects of increasing longevity of cement in-use remains a poorly studied area. This work quantitatively explores the implications of using cement for a longer in-use residence times. Specifically, this work uses dynamic material flow analysis models to quantify the in-use stock of cement in the United States from 1900 to 2015. With these models, the implications of increasing or decreasing mean longevity of in-use cement on required cement production, demand for batching water, aggregates, and energy for cement-based materials, and GHG emissions are quantified. This work shows that a 50% increase in cement longevity could have led to a 14% reduction in material resource demand and GHG emissions from concrete production in the United States, equivalent to 0.28 to 0.83 Gt of batching water, 2.9 to 7.6 Gt of aggregates, 1E+06 to 2.3E+06 TJ of energy, and 0.4 to 0.7 Gt of CO 2 -eq emissions. This percent reduction exceeds goals for reducing GHG emissions through alternative energy resources, suggesting improving durability and longevity of in-use cement stock could be a critical means to mitigating environmental impacts.

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“…Researchers previously studied the topic (Stengel and Schießl, 2014), (Qasrawi et al, 2009) proposed a simultaneous utilization of a certain industrial wastes, however, these were of an isolated character. The most common methodological approaches close to those developed by us, are presented in the studies (Shekarchi et al, 2003(Shekarchi et al, , 2004, (Chen, 2010) and reflect an achievement of the same goals with those designated in the presented study.…”

Section: Discussionmentioning

confidence: 99%

Development of the Technology of a Simultaneous Untilization of Heterogenous Industrial Wastes for a Construction Materials Production

Пугин¹,

Vaysman²,

Potapov³

et al. 2014

MAS

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Nowadays a development of industry and technology reached levels, that allow to consider industrial wastes as valuable raw material for construction materials' production. The factor, which prevents from using many kinds of wastes, is a negative impact that they have on environment and people. However, technologies allowing a usage of a simultaneous utilization of wastes with a mutual neutralization effect are known from a practice. The aim of the presented research is the analysis of previous studies on the topic of a utilization of industrial wastes in construction materials and a development of methodological approaches to their simultaneous utilization with an obtainment of construction materials which can be competitive in comparison with analogues produced from natural raw materials. In the paper, methodological approaches to a utilization of heterogeneous industrial waste products and a production of construction materials with a low negative impact on environment are presented. The basis of methodological approaches comprises principles used in the best obtainable technologies. Developed theoretical basis passed approbation during the creation of the technology of a simultaneous utilization of blast furnace slags and waste products of soda production in construction materials manufacture. In case of a utilization of blast furnace slags in construction materials production there is an increased migration of heavy metals and water-soluble compounds. With an introduction of soda m wastes, which have an increased alkaline reserve, to construction materials' composition, water soluble compounds convert in marginally soluble and insoluble. The achieved result is a 2.5-3 times decreased migration of heavy metals in environment in case of contact with water both in acid and alkaline media.

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Life cycle assessment (LCA) of ultra high performance concrete (UHPC) structures

Cited by 51 publications

References 3 publications

Life Cycle Analysis of Strengthening Existing RC Structures with R-PE-UHPFRC

Life Cycle Analysis of Strengthening Existing RC Structures with R-PE-UHPFRC

The role of cement service-life on the efficient use of resources

Development of the Technology of a Simultaneous Untilization of Heterogenous Industrial Wastes for a Construction Materials Production

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