A concrete block is primarily used as a building material in the construction of walls. The first hollow concrete block was designed in 1890 by Harmon S. Palmer in the United States. The concrete blocks in India are in use for more than 40 years. Concrete offers flexibility in production which is not there in brick making. Also investment needed by way of land and capital is much less for the concrete block manufacture compared to the brick maker. Concrete blocks are produced in large variety of sizes either solid or hollow, dense or light weight, air cured or steam cured, load bearing or non load bearing can be produced manually or with the help of machines. Hollow blocks are defined as those blocks which have core wide area greater than 25% of gross area having one or more holes open at both sides. The most commonly used concrete blocks have a nominal length of 40cm, height of 20cm and nominal width of 8,10,15 and 20cms. In addition a wide variety of non-modular blocks and special shapes are available in market for different purposes. Ojagee manufacture concrete hollow blocks of various sizes for various types of applications. The main purpose of OJAGEE hollow block is to introduce Eco- Friendly construction or building materials in place of traditional clay brick making which is harming the environment of Manipur in the manufacturing process and also these blocks are highly economical to use compare to traditional Clay Bricks. We have started a standard hollow block making plant at our factory. We will be introducing various kinds and qualities of these hollow blocks through our continuous Research and Development. We will be conducting trainings and seminars on How to use Concrete Hollow Blocks in masonry works. Please do look out for updates and announcements at our website or you can contact us through e-mail or phone calls or visit our Marketing Customer Service Centre at Sanakeithel.