Use of stone aggregates in road construction, Civil Engineering

Use of Stone Aggregates in Road Construction

Stone aggregates are extensively used in roads in pavement layers. They are obtained from natural rock. The following geological groups are commonly found in India:

(a) Igneous rocks, such as granite, ballast found in peninsular India and formed by hardening of molten material from volcanoes.

(b) Sedimentary rocks, such as sandstones found in Uttar Pradesh, Gujarat and Rajasthan, formed by deposition of granular material.

(c) Metamorphic rocks, such as quartzite found in the Aravali ridge in Delhi, Haryana and Rajasthan, formed by transformation of igneous or sedimentary rocks due to heat and pressure.

(d) Limestones formed in Rajasthan and Madhya Pradesh.

(e) Laterites, formed by decomposition of basalt and other rocks, found in Kerala, coastal Karnataka, Goa and Orissa.

(f)  River borne shingles found in the rivers from the Himalayan hills, found in Punjab, Haryana, Uttara Khand and Uttar Pradesh.

It may be noted that the Gangetic plains of Uttar Pradesh, Bihar and West Bengal do not have natural rock outcrops. In these places, the aggregates have to be hauled over long distances of 200-300 Km. Because of this handicap, the use of brick pavement and over burnt brick ballast (called Jhama metal) in lower layers of the pavement is common in these areas.

Posted Date: 1/22/2013 2:53:59 AM | Location : United States







Related Discussions:- Use of stone aggregates in road construction, Assignment Help, Ask Question on Use of stone aggregates in road construction, Get Answer, Expert's Help, Use of stone aggregates in road construction Discussions

Write discussion on Use of stone aggregates in road construction
Your posts are moderated
Related Questions
Q. Paint system to protect steelwork from corrosion? In a typical painting system, there are generally three main layers primer, undercoat and finishing coat. Primer acts as th



Q. Draw a neat dimensioned cross-sectional sketches of a - i. New single Line B.G. track in a cutting on a mainline route. ii. New double Line B. G. track on a trunk route ha


Cleaning and greasing of Rocker & Roller bearings of open web through girders : In case of standard open web through girders, no separate jacking arrangement is required as the en

Explain the Equation for a Suppressed Rectangular Weir If the approach velocity is negligible, velocity head can be excluded and the equation becomes the Francis weir equation

Estimate total dissolved solids, Alkalinity and Hardness A sample of water from Brazos River at Brenham was collected and analyzed for water quality characteristics and the dat

Question Why are manhole covers finished of cast iron as same are through of ductile iron ? Answer Usually, manholes covers are made of cast iron. Though, in viewpoint of pipe

Define Contaminants - underwater inspection of bridge? There are various substances that may be inadvertently incorporated into the concrete matrix (e.g. glass, coal, gypsum),