#TITLE_ALTERNATIVE#

• Main Author: Kin Khosama (NIM 25095015), Lelyani
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/8461
• Institution: Institut Teknologi Bandung

ABSTRACT: <br /> <br /> <br /> Concrete is one of the most frequently used building material because of its easy forming and relatively free maintenance compared to other building materials. Generally, concrete composed of cement, water and with up to 70% aggregate. Aggregate it self is normally composed of natural stones and sand, but their use are being more and more limited due to environmental constraints. New developments in concrete technology has enabled the use of waste products materials as raw materials for concrete so that the need for natural materials can be reduced, there by promoting advantageous environmental aspects. Nickel slag is obtained as a residue from the nickel mines which give pollution to the environment surrounding the plant. It gives an idea to used nickel slag as aggregate in high strength concrete. <br /> <br /> <br /> Nickel slag is composed of 41.47% silica, 30.44% ferric oxide and alumina 2.58%. With a rather large proportion of silica in the slag it is assumed that the hydration process between cement pasta and aggregate will form a strong interface so that no failure will be develop hence increasing the strength of the concrete. <br /> <br /> <br /> The test results, shown that for high strength concrete using nickel slag instead for both aggregate and coarse aggregate, have a better performance comparing to the normal concrete. The compressive strength, tensile strength, modulus of rupture or fracture resistance, modulus of elasticity and the unit weight were higher with relatively shringkage deformation. The last important point obtained from this investigation is that the interface zone crack density is relatively small shown by the microstructure.