Use of Cement Suspension as an Alternative Matrix Material for Textile-Reinforced Concrete

Materials

Jakub Řepka¹  Tomáš Vlach¹  Vladimír Mózer²  Richard Fürst²  Marek Pokorný²  Eliška Fürst³ 

[1] Faculty of Civil Engineering, Czech Technical University in Prague, 166 29 Prague 6, Czech Republic;Fire Laboratory, University Centre for Energy Efficient Buildings of Czech Technical University in Prague, Třinecká 1024, 273 43 Buštěhrad, Czech Republic;Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo n. 2, 16610 Prague 6, Czech Republic;

关键词: textile-reinforced concrete;    non-combustibility;    cohesion;    high-performance concrete;    carbon fibers;    cement matrix;   

DOI  :  10.3390/ma14092127

来源: DOAJ

【 摘 要 】

Textile-reinforced concrete (TRC) is a material consisting of high-performance concrete (HPC) and tensile reinforcement comprised of carbon roving with epoxy resin matrix. However, the problem of low epoxy resin resistance at higher temperatures persists. In this work, an alternative to the epoxy resin matrix, a non-combustible cement suspension (cement milk) which has proven stability at elevated temperatures, was evaluated. In the first part of the work, microscopic research was carried out to determine the distribution of particle sizes in the cement suspension. Subsequently, five series of plate samples differing in the type of cement and the method of textile reinforcement saturation were designed and prepared. Mechanical experiments (four-point bending tests) were carried out to verify the properties of each sample type. It was found that the highest efficiency of carbon roving saturation was achieved by using finer ground cement (CEM 52.5) and the pressure saturation method. Moreover, this solution also exhibited the best results in the four-point bending test. Finally, the use of CEM 52.5 in the cement matrix appears to be a feasible variant for TRC constructions that could overcome problems with its low temperature resistance.

【 授权许可】

Unknown