Comparison of Refractory and Non-Refractory Components in Cement Composites after High Temperatures Load

Abstract

This article shows results of experimental program focused on determination of refractory and non-refractory components for cement composites and those influence on final properties. According to several research works from various universities strength and cohesion in general of common concrete rapidly decrease with temperature higher than 600 °C. To determine the difference between fire-resistance and common components four mixtures were designed. Non-refractory crushed nature silica aggregates and Portland cement compared to high alumina cement Secar®71 with crushed nature basalt aggregates were used. Combination of basalt fibers with two different lengths significantly improves. Basic mechanical properties tensile characteristics such as tensile strength in bending and compressive strength were examined on samples 40 x 40 x 160 mm. Exposure to 600 °C and especially 1000 °C in electric furnace for three hours simulated the high temperature load. Compared to silica aggregates together with Portland cement, where after1000 °C the composite is disintegrated with almost zero strength, the refractory components show considerably better parameters.

Refractory Composites with Mineral Additive

“…Residual properties of high temperature resistant composites reached similar level for all studied mixtures. Present fact is important because of limiting of negative impact of additive with relatively high amount of quartz which goes through several phase changes during temperature loading [12]. Obtained data corresponds with research work of Keppert et.…”

Multi-Functional High-Performance Cement Based Composite

“…Additional fine components over 0.1 mm are often considered as inactive parts, toward binder system, and are usually represented by the pure silica sand however number of other rocks or mineral base could be used, such as chamotte, carborundum, basalt, corundum, glass, etc. [4,8]. Their technical properties determined by their structural properties it is necessary to take into consideration during the mixture composition design [9,10,11].…”

Influence of Moisture Content on the Thermal Properties of Concrete Containing Agricultural Waste Materials

“…Many attempted of researchers are nowadays focused on utilization of unusual feed material in concrete production. Natural material (as for example zeolite [1], metashale [2], metakaolin [3] ) and also waste materials (as ceramic powder [4,5], fly-ash [6]) are widely used. Studied material in this article is agricultural waste material; specifically coir pith is employed.…”