Advanced Materials Research Vol. 982

Abstract: In this article two arenaceous marlstones quarried in Czech Republic were compared. Thanks to its easy workability and many deposits, arenaceous marlstone belonged to the main building materials in Roman and Gothic style. In the Czech Republic many interesting historical buildings from this period still exist, and they need to be sometimes repaired. It is important to use similar material for conservation of historical values of these monuments. From the geological point of view arenaceous marlstone is sedimentary rock containing loamy and silty particles. But as it was proved in this study two functioning quarries in the Czech Republic supply two materials with extremely different properties. Open porosity varies by about 33%, compressive strength by about 65% and also thermal and hygric properties are almost incomparable.

Abstract: Fiber reinforced composites designed for better thermal resistance, which can be used in constructions with a higher fire hazard, are studied. The matrix of studied composite is based on aluminous cement, because of its proved higher thermal resistance than ordinary Portland cement. Basalt sand is used as alternative aggregate replacing silica sand, and basalt fibers are employed for an improvement of mechanical performance. The presented analysis of basic physical properties, mechanical, hygric and thermal properties shows that basalt is an appropriate material for cement based composites for high temperature applications.