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PRELIMINARY RESEARCH FOR DEVELOPMENT OF FIBER CONCRETE WITH SELF COMPACTING PROPERTIES
Abstract
Architectural restoration of historical buildings represents a very up-to-date topic of interest for the whole scientific community, architects, civil engineers and researchers. High performance and also aesthetical composite materials are continuously developed in order to fulfill the strict requirements of this sensitive area. Increased durability, superior mechanical characteristics, crack control for early cracking prevention and also smooth surface after removing of the mould / formwork represent a sum of properties to be accomplished by the composites in order to be considered viable solutions in the restoration topic. Development of concrete mixes with improved behaviour in both, fresh and hardened state represent a continuous challenge of the scientific community in the topic of material science. Improving the overall structural performance of concrete or composite civil infrastructure depends fundamentally on overcoming the traditional weak points of cement based mixes: unavoidable cracking, modest flexural performance, difficulties during casting due to vibrating needs, etc. Polymeric fibres as dispersion reinforcement of the cementitious matrix can be the solution to crack control, contraction prevention and superior durability. A further challenge might be gaining specific self-compacting (SC) properties of the material without influencing the hardened state performance. This paper presents the first preliminary results concerning the development of white cement mix designs with polypropylene fibres and addition of silica fume and lime filler, in compliance with the high demands of architectural renovation and restoration works.
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