India is a rapidly developing country and the infrastructure of the country also growing fast according to the rise in population and increase in constructional activities considering the improvement in the standard of living. hence in a modern days everyone needs to be a perfect construction materials for the masonry work which will be full-fill the requirement such as time consumption, economical, eco-friendly, earthquake resist, cheap and ease of work. on that requirement there are different types of bricks used in masonry works but from them which material is more reliable in construction of masonry work .the material which will be full-fill the above all requirement which plays an important role in developing of a country.aac blocks can be extensively used in all building constructional activities similar to that of common burnt clay bricks and fly ash bricks. the aac blocks are comparatively lighter in weight and stronger than common clay bricks and fly ash bricks. about 180 billion tones of common burnt clay bricks are consumed annually approximately 340 billion tones of clay- about 5000 acres of top layer of soil dug out for bricks manufacture, soil erosion, emission from coal burning or fire woods which causes deforestation are the serious problems posed by brick industry. use of aac blocks and fly ash bricks instead of clay bricks reduce the annually consumption of clay from the top layer of soil. unlike clay bricks, making of which uses top fertile soil, the aac block and fly ash bricks use fly ash generated as waste by thermal power plants as raw material and thus use of these helps in conserving of top fertile soil. but due to high density, high thermal conductivity and high water absorption properties of fly ash bricks, it is not reliable for construction work than aac blocks. in this project, we are comparing aac blocks with fly ash bricks and burnt clay bricks on the basis of laboratory test like water absorption test, density test and compressive strength test. there are many factors which are affecting to the construction material like economy, labor requirement, water requirement, time consumption etc. on the basis of all the tests we will be find out which material is more reliable for the construction of masonry-work.