Abstract
This project was described as the comparative study of the strength of concrete made with pure granite (chipping) to that made with river round stone (pebbles) and local stone (sandstone) and their durability considered in the design of structures. The general background gives detailed information source of aggregates used and it cited examples on research carried out with various types of coarse aggregate which show their differences in concrete made with this three aggregates. Tests were carried out which include, impact test, Absorption test, slump test and comprehensive strength test, it was discovered that his different types of coarse aggregates (pure granite, river round stone, and local stone) have a satisfactory crushing strength. Granite with 28days of arising had a compressive strength of 45N/mm, river round stone was 36N/mm2 and that of local stone 18N/mm2. And this shows that granite has a greater strength than river round stone and local stone, which was mainly attributed to greater void spaces in river round stone and also in local stone. From the result of the project work, I recommend that good quality concrete could be made with all the aggregate used. But pure granite has superior quality than river round stone and local stone when used in heavy structure in high rising buildings.
