Material Properties of Fibre-Cement and Fibre-Concrete Composites Used for Plated Components of Building Structures
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Material Properties of Fibre-Cement and Fibre-Concrete Composites Used for Plated Components of Building Structures
Marcela Karmazínová1 1
Brno University of Technology, Faculty of Civil Engineering, Brno, Czech Republic
ABSTRACT The paper presents the brief information on particular results of experimental studies dealing with the problems of properties of materials based on fibre-cement and fibre-concrete composites, which are being recently developed, tested and verified, to use them in the plated components of load-carrying structures of building constructions. The problems mentioned are solved in the co-operation with the company of the Research Institute of Building Materials Inc. (“VUSTAH a.s.”) at Brno city in the Czech Republic. The attention is paid to two basic types of material: (i) fibre-cement composite used for the slab components intended for vertical or horizontal building or technology structures, such as permanent shuttering of bridges, timber floor structures and slab flooring, the wall cladding of buildings and formwork of components in manufacturing plants of the concrete units; (ii) glass-fibre-concrete composite mainly intended for the building façade claddings, but also for the objects of daily use. The experimental verification has been mainly oriented to the investigation of physical-mechanical properties, like as the tensile-bending strength, as well as the corresponding modulus of elasticity.
INTRODUCTION Within the development and research of fibre-cement and fibre-concrete composites the mechanical properties of two materials have been investigated and verified, to obtain the real information for the reliable usage of these materials in plated members of load-carrying structures of building constructions, which means, in particular, large-area components and panels of façade claddings. The more extensive testing program was partially focused on the determination of mechanical characteristics which are important from the viewpoint of the structural design of fibre-cement or fibre-concrete slabs with regard to the loading effects in the case of their applications on civil engineering constructions, especially on the building facade claddings. The static loading tests performed according to the specification of the Czech modification of the European Standard EN 12467 [6] constitute the data source for the determination of the strength characteristics of fibre-cement or fibre-concrete slabs. MATERIAL TESTS OF FIBRE-CEMENT COMPOSITE Fibre-cement composite mentioned is composed of cement matrix with polypropylene and cellulose fibres in a mutual combination. In comparison with some materials based on other types of fibre-cement or fibre-concrete [1, 2], the products made of this type of fibre-cement do not reach such high-quality physical, chemical and mechanical properties as well as load-
carrying capacity, but they very good complies with environmental and ecologic requirements [3, 4]. Fibre-cement components are produced in the form of slabs with the usual thickness of 5, 10, 15 or
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