ON THE CHEMO-MECHANICAL BEHAVIOR OF BASALT TEXTILE REINFORCED REFRACTORY CONCRETE UNDER HIGH TEMPERATURES

Author(s): D.A.S. Rambo, F.A. Silva, R.D. Toledo and O.F.M. Gomes
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 201-208
Total Pages: 8
Language: English

Abstract: The use of prefabricated cementitious materials reinforced with fabrics has increased in the last decade, as well as its range of possible applications in the construction industry. It is important to consider, however, that in many applications the TRC (Textile Reinforced Concrete) undergoes thermal effects. The work in hand presents the results of an experimental investigation on the thermo-mechanical properties of a textile refractory composite reinforced with polymer coated basalt fibers under tensile loading. A chemical approach was used in order to understand the decomposition processes that occur in the refractory matrix. The composites were produced as a laminate material using basalt bi-directional fabric layers as reinforcement. A high alumina cement matrix was used in the matrix composition which was designed using the compressible packing method. A series of uniaxial tensile tests was performed under temperatures ranging from 25 to 1000°C. The cracking mechanisms were discussed and compared to that obtained at room temperature. Thermogravimetry and X-ray diffraction analysis were used to study the deterioration/phase changes as a function of the studied temperatures. Scanning electron microscopy (SEM) was used to study the damage processes in the fiber–matrix interfaces after exposure to high temperatures and also to identify the hydrates present in the refractory matrix.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00