TG7.3 - Concrete made with recycled materials – Life cycle perspective

The objective of TG7.3 is to collect statistical data on concrete production, waste generation and those related to resource recycling in the world. The objective also includes an investigation of:

• the properties of recycled materials for concrete made from waste and by-products,
• the properties of concrete with recycled materials and their applications
• concrete recycling technologies, and
• the environmental impact caused during recycling of concrete waste.

Finally, TG7.3 will publish a state-of-the-art report on concrete with recycled materials such as demolished concrete, ceramics, glass, ashes, organic waste, etc. and to propose the ideal future for recycling concrete resources considering aspects of durability and recyclability of concrete, and minimising the environmental impact in the life cycle.

Convener
Takafumi Noguchi

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TG7.5 - Environmental product declarations (EPD) and equivalent performance of concrete

The objective of Task Group 7.5 will be two-fold:

• to recommend preferred approaches (road maps) for establishing "equivalent performance" of low environmental impact concrete typically containing high amounts of supplementary cementitious materials and therefore in terms of composition falls outside the prescriptions found in existing standards/regulations. By equivalent performance is understood that the concrete has acceptable production, structural and durability properties for its intended use. Clear road maps for establishing equivalent performance are a prerequisite and will likely act as a catalyst for increased use of such lower environmental impact concrete compositions to the benefit of the global community.
• to establish best available technologies for Environmental Product Declarations (EPDs) on concrete compositions (mix designs). EPDs are an emerging means, which, if performed on a common basis, allow a comparison of the environmental impact of different concrete compositions/products. As such, EPDs may be used by the consumer (end-user) to make a qualified decision concerning the choice of concrete, e.g. as requirements to the environmental performance can be verified and therefore also specified.

Convener
Costantino Menna

Co-Convener
Ladin Camci

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TG7.6 - Resilient structures

The objective of this task group is to highlight criticalities in current structural design practice and to provide fundamentals to address the design, the maintenance and the retrofit principles towards resilient structures in sustainable urban systems, and more broadly, in view of smart cities.

TG7.6 aims to develop guidelines to help diverse stakeholders involved within such processes to face resilience issues through a multiscale approach.

These guidelines will approach resilience issues according to a multiscale approach, starting from the single building scale. Structural design principles are rethought from the point of view of the practicality, reparability, robustness and serviceability in the aftermath of a catastrophe. Particularly, performance goals are recognised to define new resilience-based limit states, in order to enhance disaster preparedness and response of urban structures. Innovative and novel standards and metrics are implemented within the guidelines, as a support to the development of post-event strategic intervention, protection and response technologies and recovery strategies.

Convener
Domenico Asprone

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TG7.7 - Sustainable concrete masonry components and structures

Current requirements on energy efficiency, building comfort and sustainability have stimulated a growing use of new concrete technologies for construction and retrofit of (i) load-bearing walls in unreinforced, reinforced and confined masonry buildings and (ii) cladding, infill and partition walls in reinforced concrete or steel framed building structures. In that respect, researchers, designers, construction companies and building owners have paid special attention to the use of autoclaved aerated concrete (AAC) and light-weight aggregate concrete (LWAC) with recycled waste aggregates for production of innovative concrete masonry units (CMUs). It is also emphasised that CMUs may be formulated with special aggregates to produce specific colours or textures for finish use.

The scope and objective of TG7.7 will move in that direction in order to develop a general methodology for construction, design, assessment and retrofit of concrete masonry panels and walls.

Convener
Fulvio Parisi

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TG7.8 - Recycled Materials and industrial by-products for high performance reinforced concrete structures

The objective of Task Force 7.8 within fib Commission 7 is to address the sustainable use of materials through the effective exploitation of waste materials and industrial by-products, for the production of high-performance concrete with enhanced durability.

The objective of the task group 7.8 is to highlight critical aspects in current practice in waste recycling and use of secondary materials for high performance concrete. It shall address the state of the art, best practice and also identify and analyse gaps in the exploitation of waste materials with potential for delivery of high-performance durable concrete.

The task group aims at developing a framework for guidelines to help different stakeholders involved within the recycling industry and the producers of HPC, in order to facilitate the production and classification of materials but also their exploitation for HPC optimisation.

The Task Force is to address the following key areas:

• The production of high-performance concrete based on waste and industrial by-products.
• Use of waste materials as a substitute for aggregate
• Use of by-products as supplementary cementitious materials.
• Resilience of reinforced concrete structures with improved structural performance through the application of industrial by-products for safe structures, promoting sustainability practices.
• LCA applications & integrated end of life considerations for waste recycling to produce high performance concrete.
• Framework for Guidelines for the production and classification of waste and its application in high performance concrete.

Convener
Ruben Paul Borg

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