fib Bulletin 67. Guidelines for green concrete structures

Glavind, Mette; Asprone, Domenico; Bleiziffer, Jelena; Buhr-Jensen, Birit; Choi, Dong-Uk; Spot, Michel de; Desmyter, Jan; Kawai, Kenji; Müller, Christophe; Nielsen, Claus V.; Noguchi, Takafumi; Öberg, Mats; Piscaer, Boudewijn; Sakai, Koji; Small, Alex

doi:10.35789/fib.bull.0067

Cited by 11 publications

(6 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…According to that, "the purpose of design for sustainability is to reduce impacts on the environment, society and economy by evaluating and verifying the performance" of either a concrete mix, a structural component, or the structure as a whole. In addition, the b published a bulletin on green structures in 2012 (Glavind et al 2012). This guideline was developed to provide valuable tools for owners, users, designers, and producers of concrete to reduce the environmental impact of concrete structures throughout their entire service life (Glavind 2011;Glavind et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Carbon footprint of reinforced concrete columns with and without supplementary cementitious materials

Cordoba

Irassar

2023

Int J Life Cycle Assess

View full text Add to dashboard Cite

The construction sector consumes a large quantity of natural resources and generates a great deal of carbon dioxide emissions and wastes, affecting its sustainability. Replacing Portland cement with supplementary cementitious materials (SCM) could reduce the environmental impact. This paper examines the carbon footprint of reinforced concrete columns. It focuses on the in uence of increasing the steel cross-section and reducing the clinker factor by replacing Portland cement with SCM. MethodsEighteen concrete mixtures were selected and classi ed according to the speci ed compressive strength at 28 days of curing using binary and ternary blended cements. Columns were designed consisting of such concretes and employing different reinforcing steel cross-sections. The Life Cycle Assessment was conducted on ISO 14040 standard. The embodied carbon dioxide (ECO 2 ) of the reinforced concrete columns was determined. ResultsThe results show that the higher the compressive strength of concrete, the lower the carbon footprint of the columns. Concretes with a high volume of SCM replacement and low compressive strength at 28 days do not show the lowest carbon footprint since it requires a greater volume of material to withstand the bearing capacity. The carbon footprint of the columns increases as the steel section increases.Furthermore, increasing the compressive strength of concrete is less bene cial for reducing the carbon footprint of the column when the steel cross-section is increased. ConclusionsPortland cement is the component material of concrete that contributes the most to the concrete carbon footprint, and steel has the highest ECO 2 /ton. Replacing Portland cement with SCM reduces ECO 2 at one point of the life cycle and may increase the material volume and ECO 2 at another. The lowest carbon footprint of compressed reinforced concrete elements is achieved for the higher-strength concretes and the minimum steel cross-section.

show abstract

Section: Introductionmentioning

confidence: 99%

Carbon footprint of reinforced concrete columns with and without supplementary cementitious materials

Cordoba

Irassar

2023

Int J Life Cycle Assess

View full text Add to dashboard Cite

show abstract

“…This is due to the fact that clinker—which is the main constituent not just in ordinary Portland cement (OPC), but also in Portland composite cements, for example, according to EN 197-1 [ 2 ]—is primarily responsible for the global warming potential (GWP or CO 2 -eq.) and total primary energy demand (PEt) of normal concrete [ 3 , 4 ]. In contradiction to future technologies like CO 2 -capture and storage or clinker free, alternative cements, the development of binders and concrete with low clinker content is a practicable solution for decarbonization in building practice already today.…”

Section: Introductionmentioning

confidence: 99%

The Realization of Clinker-Reduced, Performance-Based Sustainable Concrete by the Micro-Filler, Eco-Filler Concept

et al. 2021

View full text Add to dashboard Cite

In times of climate change, the reduction in embodied greenhouse gas emissions is a premise for sustainable concrete infrastructure. As Portland cement clinker is mainly responsible for the high CO2 emissions of concrete, its reduction is necessary. In order to be sustainable, the concrete must meet processing, mechanical and durability properties while taking cost aspects into account. The paper presents (i) the “micro-filler/eco-filler concept” for achieving a clinker reduced, optimised binder and (ii) a performance-based approach to put sustainable “Eco-concrete” into practice. Clinker is substituted by locally available inert fillers by at least two different particle size fractions and supplementary cementitious materials. The method is based on particle packing optimisation, reduction in water demand and optimisation of the mix ratio of the binder blend, which allows the performance requirements to be met. The new Eco-concretes deliver the desired performance in terms of processability, strength and durability (water penetration, frost, carbonation and chloride resistance) while lowering the environmental impact in comparison to standard concrete. One of the new mixes was used for a small animal passage tunnel. The direct comparison of the developed Eco-concrete and standard concrete showed a 24% reduction in CO2, while achieving satisfactory workability, stripping strength and durability performance.

show abstract

“…In times of climate change increasing attention must be directed to greenhouse gas emissions (kg CO 2 -equ., global warming potential, GWP) and embodied energy (or total primary energy, PEt) of the most used construction material worldwide -normal concrete [1], [2]. In respect to durability of innovative, eco-efficient materials, the specification of test methods and parameters to prove their performance over their service life is of prime importance, especially as these do not comply with existing standards, such as the "ecoconcrete" presented in the paper.…”

Section: Introductionmentioning

confidence: 99%

“…The principles of "green concrete" or "ecological concrete" were pointed out by [1,2,[4][5][6]. The general approach of this study is illustrated in Figure 1 according to [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, equivalent functional performance of an eco-mix compared to normal concrete has to be considered. Cement clinker -which represents 95 wt.% of ordinary Portland cement (PC) according to EN 197-1:2018 and is also the main constituent of Portland composite cement -is primarily responsible for GWP and PEt of the paste of normal concrete [1,2]. In an optimized paste PC with its high GWP and PEt is partly substituted by properly selected very fine micro-fillers (MF) and coarser eco-fillers (EF) that have low water demand and lower environmental impact (Table 2), [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Air permeability, water penetration and water absorption to specify durability of eco-efficient concrete

Juhart¹,

Bregar²,

David³

et al. 2019

RILEM Tech Lett

View full text Add to dashboard Cite

The durability of eco-efficient, clinker reduced concrete is a key factor of its performance. In the presented study, different durability indicators of a newly developed eco-concrete composition (ECO) are tested versus standard normal concrete as reference (REF). The tested durability indicators are open porosity, water penetration depth, rate of water absorption by capillarity and two different methods of measuring air permeability (PermeaTORR AC device versus Testing bubble counter). The ECO mix and in particular its cementitious matrix is designed by a combined filler concept substituting Portland cement partially by properly selected limestone fillers of different grain sizes. The approach is based on a combination of particle packing optimization techniques and the reduction of water demand for certain flowability of the paste. Cement content is below the limits of traditional standards while w/c-ratio exceed such limits. While the performance of the eco-concrete in terms of workability and strength is at least equivalent to the standard mix, ecological impact indicators as global warming potential and embodied energy are substantially improved. Durability indicators overall show nearly equivalent performance of ECO and REF. In detail, the resulting air permeability coefficient tested with a bubble counter differs significantly from the coefficient tested by PermeaTORR.

show abstract

fib Bulletin 67. Guidelines for green concrete structures

Cited by 11 publications

References 0 publications

Carbon footprint of reinforced concrete columns with and without supplementary cementitious materials

Carbon footprint of reinforced concrete columns with and without supplementary cementitious materials

The Realization of Clinker-Reduced, Performance-Based Sustainable Concrete by the Micro-Filler, Eco-Filler Concept

Air permeability, water penetration and water absorption to specify durability of eco-efficient concrete

Contact Info

Product

Resources

About