Search

Mineral admixtures such as fly ash (FA), ground granulated blast furnace slag (GGBS), metakaolin (MK), and silica fumes (SF) derived from industries are often referred to as secondary cementitious materials, as partial replacements for cement. Also, the use of fibres significantly enhances the flexural behaviour of concrete. Various kinds of literature highlight the performance of concrete with one or two types of admixtures. In this study, an attempt is made to explore the effect of the use of more than two admixtures viz. FA, GGBS and MK as a partial replacement to cement and fibrofor fibre (FF) on workability and strength properties of based Fibre-Reinforced Self-Compacting Concrete (FRSCC). The FF in Self-Compacting Concrete (SCC) is varied from 1.0 to 2.0 kg/cum. The SCC samples are tested for three curing durations. Based on the experimental investigations, the workability of all the mixes is found to be within the EFNARC limits. The variation in the compressive strength of SCC for various fibre dosages is within 10%, after 28 days of the curing period. It is noted that A-10 mix with fibre dosage of 1.0 Kg/cum yielded the highest compressive, split tensile, and flexural strengths after 56 days of curing, as compared to that of all other variations including conventional SCC mix. [ABSTRACT FROM AUTHOR]

Textile reinforced mortar often referred as TRM in the literature combines open mesh configuration textiles with inorganic cement-based mortars. The aim of the present study is to determine the mechanical properties of hollow concrete block masonry externally bonded with coir and glass textile reinforced mortar composites. The properties of textile composites were determined by testing TRM Coupons. A total of 39 prisms were cast. The block masonry prisms were externally bonded with coir and glass textile fiber mesh with mortar. The elastic properties of block masonry, shear and flexural strength were determined for both unreinforced and strengthened specimens. The results showed that increasing the number of layers of textile fibers, enhanced the flexural capacity of TRM coupons. The provision of connectors also enhanced flexural strength. The stiffness of unreinforced masonry prisms was found to increase by strengthening with textile reinforcements even though the increase in compressive strength is marginal. There is a significant enhancement in flexural strength and shear bond strength of externally bonded specimens when compared to unreinforced masonry. [ABSTRACT FROM AUTHOR]

The compressive strength of masonry, whether brick or concrete block masonry is an important parameter in the design of masonry structure. The compressive strength of masonry depends on many parameters including strength and modulus of elasticity of the unit and mortar. Experimental determination of compressive strength of masonry is time consuming, labour intensive and expensive. The numerical and analytical approach is an effective alternative to experimental investigations. This work aims to simulate the behaviour of block masonry under compression using ABAQUS and ANSYS software. The results obtained from the experimental investigation are used as input to carry out numerical analysis in the above-mentioned software. The results obtained from each of these software are in line with the experimental findings and is promising. [ABSTRACT FROM AUTHOR]