Experimental Study on Mechanical Properties of Basalt Fibre Reinforced Concrete
Concrete is very strong in compression but very weak in tension. However it is reported that tensile and bending strength of concrete is 10 to 15% of the compressive strength respectively. The addition of different types of fibres in concrete have significantly improves its compressive as well as tensile strength. Among the new advancement in field of FRC is the basalt fibre reinforced concrete. In the present study basalt chopped fibres were used in the concrete mixes and compressive and flexural strength of the specimens were tested. A total of 5 mixes were prepared by varying the percentages of basalt fibres on M 25 grade of concrete mix. Based on the laboratory results the compressive and flexural strength was reported to increase up to 46% and 74%. However the workability of fresh concrete mixes is not much affected by the addition of fibre content. The flexural strength of concrete is improved which shows the wide application of basalt fibres in concrete mixes for construction in various fields i.erailway, bridges, runway and tunnels.
Effect of Copper Slag and Basalt Fibers on Various Properties of Concrete
The purpose of this research is to find the suitability of copper slag as an alternative material for the river sand. This experimental study was divided into four phases, where in the first phase physical properties of cement, aggregates and copper slag were examined. In the second phase, M30 grade of concrete is chosen to perform the effective replacement of copper slag with fine aggregate by replacement levels of 0%, 20%, 40% and 60% and the behavior of fresh and hardened properties of concrete was carried out. Fibers of the 21st century non-metal inorganic fiber, extracted from Basalt rock called Chopped Basalt Strands which is a relative newcomer to fiber reinforced polymers (FRPs) and structural composites were used in the concrete taken in 0%, 1% and 2% by weight of cement. At 20% replacement of copper slag with 1% basalt fibers showed the maximum strength for cube compressive strength, cylinder compressive strength, split tensile strength. For flexural strength, at 20% replacement of copper slag with 1% basalt fibers showed the maximum strength. By acid attack test, the maximum percentage loss of weight and percentage loss in compressive strength was found for 60% replacement of copper slag.
Modeling of properties of fiber reinforced cement composites
This paper presents the results of authors' laboratory testing of the influence of steel fibers as fiber reinforcement on the change of properties of cement composite mortar and concrete type materials. Mixtures adopted - compositions of mortars had identical amounts of components: cement, sand and silica fume. The second type of mortar contained 60 kg/m3 of fiber reinforcement, as well as the addition of the latest generation of superplasticizer. Physical and mechanical properties of fiber reinforced mortars and etalon mixtures (density, flexural strength, compressive strength) were compared. Tests on concrete type cement composites included: density, mechanical strengths and the deformation properties. The tests showed an improvement in the properties of fiber reinforced composites.