The roller is construction machinery which is used to compact the soil, road surface, gravel, and sand. The compaction of soil greatly depends upon the nature or types of soil. Therefore, choosing the right type of roller for soil compaction also plays an important role. Thus, the article is about the types of rollers used for compacting the soil.

shlar masonry is another type of stone masonry works, which has been developed over the time when stones has put to construction works. A popular monument such as Machu Picchu, Pyramid of Menkaure, and Royal Tombs of Mycenae at Greece are some of the example for the used of ashlar masonry. In ashlar masonry, boulder are of uniform size and laid with uniform thickness mortar.