International Journal of Innovative Research in Engineering & Management (IJIREM) ISSN: 2350-0557, Volume-10, Issue-1, February 2023 https://doi.org/10.55524/ijirem.2023.10.1.25 Article ID IJIRD-1239, Pages 142-146 www.ijirem.org Innovative Research Publication 142 Comparative Study of the Strength Properties of the Concrete with Partial Replacement of the Coarse Aggregate with Pumice and Over Burnt Bricks K Sumanth Kumar 1 , Manoj Kumar 2 , D Ramya 3 , D Sivaiah 4 , K Ramu 5 , K Sri Vishnu 6 , and S Venka Reddy 7 1,2 Assistant Professor. Department of Civil Engineering, PACE Institute of Technology and Sciences, Ongole, Andhra Pradesh, India 3,4,5,6,7 B.Tech Student, Department of Civil Engineering, PACE Institute of Technology and Sciences, Ongole, Andhra Pradesh, India Copyright © 2023 Made K Sumanth Kumar et al. This is an open-access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. ABSTRACT- Concrete is the universally accepted material for its adverse properties with high usage of the concrete for all type of the works in the world, it leads to depletion of natural resources like river sand, and granite. Which are the components of the concrete as fine aggregate and coarse aggregate in this project M30 grade concrete is taken in which 10%,20%&30% of coarse aggregate is replaced with over burnt bricks and 10%,20%and 30% of coarse aggregate replaced with pumice by volume. And the compressive, flexural and split tensile strength properties at 7,28& 56 days and the unit weights of the concrete compared. In order to safe guard the natural resources, alternate material like over burnt bricks, pumice considered in the present project. KEYWORDS- Partial Replacement, Coarse Aggregate, Pumice,Over Burnt Bricks I. INTRODUCTION A. Light Weight Concrete Structural lightweight concrete has an internal density (unit weight) of 1440 ~ 1840kg / m3 compared to normal weight concrete with density of 2240 ~ 2500kg / m3. For structural use, the concrete strength must be at least 17.0 MPa. The concrete mixture is made of lightweight coarse aggregate. In some cases, some or all of the micro aggregates may be lightweight products. Lightweight aggregate used in structural lightweight concrete is a lightweight shale, clay or slate pumice material usually fired from a rotary furnace to develop a porous structure. Other products such as air-cooled blast furnace slag and hematite are also used. There is a different class of unstructured lightweight concrete made from other aggregate materials and with higher air voids in cement paste matrices (eg cellular concrete). These are typically used for insulation properties. The main use of structural lightweight concrete is to reduce the dead load of concrete structures, and structural designers can reduce the size of pillars, foundations and other load bearing elements. Structural lightweight concrete mixtures can be designed to achieve similar strength to normal weight concrete. The same is true for other mechanical and endurance performance requirements. Structural lightweight concrete provides more efficient strength-to-weight ratio of structural elements. The mild cost of most lightweight concrete is offset by a reduction in the size of the structural members, reinforcement of the steel and reduction in the volume of concrete, thus reducing overall costs. II. OVER BURNT BRICKS Bricks are the most important part of development work and are used by humans for a long time. Its history dates back to the earliest times of human civilization. Many world-renowned archaeological excavations provide a wealth of information on brick usage in many parts of the world. A few years ago, bricks were made in warm places and hardened with simply sunlight. The sun-dried mud- brick hand was made and used in pre-porcelain neolithic times. The oldest brick use case was first discovered in southern Turkey. The Sumerian palace in Kish, Mesopotamia, is another excellent example of the use of ancient bricks. The brick burned in the 5th century BC was used as part of the city of Babylon. The ancient Egyptians also used sun- dried clay bricks in world-famous sites. During the Roman Empire, the use of bricks spread throughout Europe spreading to Italy and the Byzantine area. 11th In the development work, the use of blocks spread from this land. After the great fire in London in 1666, the city was rebuilt with most of the block structures. Bricks in the United States have been used in Virginia since 1611, and Sundried bricks have been made and used centuries in Central America, especially in Mexico. Brick walls that are only visible in the mid-18th century are again popular. A beautiful example of brick was found in India in the 20th century. B. Pumice stone Pumice stone is a textural material formed from rapidly cooling viscous molten rock by trapping gas bubbles which results in a foamy whipped glass. The word pumice is derived from Latin word pumeu, that meaning foam. It is even formed in deep undergrounds and when the magma erupts from a vent by forming the gases which leaves a frothy structure. The transformed magma is the