The title of this Committee is TC-HFC (High Performance Fibre Reinforced Cementitious Composite). The life of this committee will be June 1, 2004 -- May 31, 2009.
Chairman: Prof. Dr. Li Victor C.
Secretary: Prof. Dr. Fischer Gregor
High Performance Fibre Reinforced Cementitious Composites (HPFRCC) is a unique class of concrete material exhibiting strain-hardening behaviour under uniaxial tension, in contrast to tension-softening behaviour in most other cementitious materials. The development of HPFRCC has been rapid in the last decade, and especially in the last several years, to the point where industrial applications are being developed. Despite the obvious advantages of HPFRCC and significant amount of research worldwide, there remain a number of obstacles to their wide adoption in practice. The broad objective of this Committee is to identify and develop systematic solutions to these obstacles in relation to structural design, material property characterization and testing, and field execution. The focus will be on HPFRCC in structural applications, so that the linkage between materials and structures must be emphasized in all aspects of work of this TC.
The estimated time needed for the work is 4-5 years. The following working package/time schedule is proposed:
In year 1, a preliminary workshop will be organized to define the state-of-the-art of HPFRCC for structural applications. A proceeding volume will document the most up-to-date information on the behaviour of HPFRCC and their elevation to structural performance, appropriate material characterization suitable for structural design purpose, robust material testing techniques, large scale material manufacture, as well as case studies of industrial applications and full scale demonstration projects. The output of this workshop will be the definition of required research and the establishment of a round robin testing programme. The workshop proceeding will also serve as a guide for the rest of the Committee Programme. In years 2 and 3, round robin experiments will be carried out by various research and industrial groups worldwide on the behaviour of HPFRCC in uniaxial tension and flexure, as well as its durability. Test results will be published in a special issue of Materials and Structures in year 4. While not within the jurisdiction of this TC, we expect research advances based on the identified needs of the year 1 preliminary workshop will be made during years 2 to 4. An international workshop concluding the work of this TC will be held in year 5. The output of this workshop will be specific recommendations that are usable by code writing bodies (e.g. CEN in Europe and ACI in US) for implementation of HPFRCC in structural designs. It is emphasized that in all phases of the TC work, industry participation will be strongly encouraged.
Initially three subcommittees will be set up under this TC. These are:
Additional subcommittees will be appointed as needed and as the work of this TC develops.
A number of technical bodies have been discussing or acting on various aspects of HPFRCC. For example, a recent (2001-2004) JCI Committee on Ductile Fibre Reinforced Cementitious Composites has been focusing on bringing together the academic and industrial communities to advance HPFRCC in structural applications. ACI Committee 544 has been discussing the need to translate the fruits of research in FRC into structural design practice. RILEM TC TDF-162 has developed recommended testing and characterization methods for tension-softening FRC. ACI Committee 318 (on Building Code Requirements for Structural Concrete) has expressed a desire for the HPFRCC research community to bring forward "usable" information for consideration of incorporation of HPFRCC into the building design codes.
The main deliverables from this TC will be:
There are several targeted users of these products (in no particular order):
This TC should aid in translating the potential benefits of HPFRCC to field realization of HPFRCC engineered structures. The economic impact on material suppliers, and design and construction firms is difficult to estimate at this time, but based on information from pilot projects is expected to be enormous. It is anticipated that more efficient, safe, reliable and durable infrastructures can be built with HPFRCC, so that the social and environmental impacts will be just as big.