The term reactive powder concrete (RPC) has been used to describe a fibre reinforced , superplasticized, silica fume-cement mixture with very low water-cement ratio, characterized by the presence of very fine aggregates instead of ordinary aggregate. It is having compressive strength about 150MPa. Fibres are incorporated in RPC in order to enhance the fracture properties of the composite material. Reactive powder concrete, is recognised as a revolutionary material that provides a combination of ultra-high strength and excellent durability. However, production of reactive powder concrete is not yet available with the limited research in this area. This paper investigates mechanical and fresh concrete properties of reactive powder concrete.

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Aerated concrete is a type of light weight concrete which consist of a binder, fine aggregate and an aerating agent. Aluminium powder is the most commonly used aerating agent and it reacts with calcium hydroxide liberating hydrogen bubbles which causes the air entrainment of the mix. In this paper, study of properties aerated concrete incorporating additives like fly ash as a replacement to cement, which lead to the consumption of waste products. A cement to fine aggregate ratio of 1:2 have been adopted and water cement ratio is fixed as 0.45 by trial and error method.

Waste tyre and plastic management is a serious global concern. Dumping or disposal of these waste products causes environmental and health issues. This project investigates wide range of physical and mechanical properties of concrete containing recycled tyre and plastic aggregates. Waste tyre and plastics are crushed into fine particles of various sizes and are used to replace fine aggregate in concrete. Fine scrap tyre and plastic aggregates are added as 5%, 10%, 15% increment to replace fine aggregate, this study aims to investigate the optimal use of these wastes as fine aggregate in concrete composite. Compressive strength, split tensile strength, flexural strength of different mixes of concrete added with these wastes were found.

Concrete is the most widely used man-made material in the world. Concrete derives its strength by the hydration of cement particles. The Curing allows continuous hydration of cement and consequently continuous gain in the strength. Scarcity of potable water increases day by day. The use of membrane curing compound is very important from the point view that water resources are getting valuable every day. The advancements in the construction and chemical industry have paved way for the development of the new curing techniques and construction chemicals such as Membrane curing compounds, Self-curing agents, Water proofing compounds etc. This study considered the effectiveness of various curing methods on the properties of concrete. Curing has a strong influence on the properties of hardened concrete. The parameter of the study includes various curing period and various curing methods [Dry curing, Immersion technique, Liquid membrane curing compound, water proofing compound].