Performance assessment of concrete incorporating admixtures and stone waste powder

Abstract

The construction industry can use various industrial by-products as raw materials, including wastes from the stone glazing industry, thermal power plants, steel, and rubber sectors. Although the stone industry has a major contribution to the construction industry, it has some limitations regarding landfill disposal of slurry and dust form waste. Accelerators increase the rate of stiffening and hardening, which increases early strength to allow early striking and demoulding of outer formworks, which helps to speed up the construction work. In the present investigation, properties such as slump, mechanical, chemical resistance, and microstructural characteristics of concrete specimens were investigated using calcium nitrate (1%), triethanolamine (0.05%), and stone waste powder (10%) alone and in combination. The ecological and economic analysis of concrete was also carried out along with performance evaluation. Results showed that when used separately in the concrete mixture, stone waste powder, calcium nitrate and triethanolamine enhanced the performance, but their combination declined it. The stone waste powder was economical and eco-friendly material in concrete.