All civil engineering structures are built on rock so, engineering properties of rocks are very much important. QUARTZITE: A metamorphic or sedimentary rock with crystalline texture, consists of rounded quartz grains cemented by crystalline quartz, generally white, light gray or yellow to brown. Many sedimentary rocks are simply dug up as is, in small pieces, or crushed into construction sand and gravel with various engineering uses, too many to really enumerate. Perhaps what are they used for? Based on this, science has divided rocks into three categories-Igneous Rocks; Sedimentary Rocks; Metamorphic Rocks Uses of rocks in Civil and Highway Engineering are: Blocks of stones are used in foundations, walls, bridge pier, abutments, lighthouses, aqueducts, and retaining walls. They are frequently chosen for building materials and artwork. When sedimentary or even igneous rocks are subjected to great heat and pressure inside the earth, a new variety of rock is formed which is known as metamorphic rock. This change of structure is called metamorphism. To sum up., the formation of different sedimentary rocks occurs from different ways and methods. Types, Importance and Uses of rocks in constuction. Igneous as well as sedimentary rocks are changed in character when they are subject to great heat and pressure. Very few rocks have as many uses as marble. Types, Importance and Uses of rocks in constuction. Known as metamorphism. These rocks are formed by the change in character of the pre-existing rocks. ... [NPTEL Notes PDF] Civil Engineering … Quartzite and marble are the most commonly used metamorphic rocks. All civil engineering structures are built on rock so, engineering properties of rocks … They are often used as decorative facias, wall panels, tabletops etc., Because they are beautiful. Rocks fall into three classes according to their origin: Igneous, Sedimentary, Metamorphic. Due to seasonal variations the materials are deposited in layers. Loading. Some gneiss is durable … Metamorphic rocks are used for roofing material, decorative gardening stone, the base for snooker tables, building material, sculpture material and paving material. In the nature there are so many types of rocks are available which are used in construction and engineering purposes. Uses of sedimentary rock can be found in almost all buildings and public structures. However, igneous rock uses are specific to its type, which is classified according to the formation process, mineral content, hardness, texture and other properties. A rock may be thought of as a "mineral environment." ... sedimentary and metamorphic rocks. Metamorphic rocks come in three different types: slate, marble and schist. Basalt is one of the main rocks to form the oceanic crust (the part of the Earth's surface under the Ocean). It is used for its chemical properties in pharmaceuticals and agriculture. This is why they differ in terms of the way the rocks look and the uses that they serve. It is used for its optical properties in cosmetics, paint, and paper.