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The IUP Journal of Structural Engineering :
A Study on Partial Replacement of Coarse Aggregate with Shahabad Stone
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With the increase in demand for construction materials, there is a strong need to utilize alternative materials for sustainable development. Advancements in technology not only get better human comforts but also harm the environment. Use of waste stone as an aggregate in construction industry has become popular and safe now. At present, construction industry is in need of finding cost-effective materials to enhance the strength of concrete. The effect of Shahabad stone (a variety of Cudappah) and the chemical admixture (superflo) on concrete was investigated. Natural aggregate had been replaced with the waste Shahabad stone in six different percentages, namely, 25, 30, 35, 40, 45 and 50%. A comparison was made between the specimens of partially replaced coarse and the same set of specimens admixed with superflo. The effect on compressive strength, split tensile strength and flexure was reported. The results indicate that the mechanical properties of concrete increase with 40% replacement of coarse aggregate with Shahabad stone.

 
 

With the increase in the developmental activities world over, the demand for construction materials is increasing exponentially. This trend will have a certainly greater impact on the economic system of any country. India is also aiming at a high developmental rate compared to other nations in Asia. There is heavy demand for the building materials in the domestic market, which is becoming scarce day-by-day. Building stones generally used in the US are limestones, marbles, granites and sandstones. Other stones such as serpentine and quartzite are used locally but to a much lesser extent. Stone, in general, makes an excellent building material, if properly selected on the basis of experience, but the cost may be relatively high. The properties of stone depend on what nature has provided. Therefore, the designer does not have the choice of properties and color available in some of the manufactured building units. The most the stone producer can do for purchasers is to avoid quarrying certain stone beds that have been proved by experience to have poor strength or poor durability. In this paper, an effort has been made to study the partial replacement of coarse aggregate with Shahabad stone which is a variety of Cuddapah stone.

 
 

Shahabad stone, Flexural strength, Replacement, Tensile strength, Superflo