Retrofitting of Bridges Affected during Seismic Activity
Occurrence of earthquake is no more a rare eventuality. India has witnessed several major earthquakes, involving substantial loss of lives. To name a few, a major earthquake (Richter scale 8.5) occurred in Assam in 1897 wherein the reported death
Retrofitting Techniques for Bridges and Flyovers
The extensive damage to bridges world over in earthquakes has generated considerable interest amongst the engineers and researchers on the seismic design of new bridges and retrofitting of existing ones. Prior to the
Water Highways The Aqueduct Wonders
Getting water to where it is needed has been a concern from times immemorial. While early civilizations set themselves up close to water sources, there were difficulties as the settlement spread. Aqueducts or water bridges
Critical Review Points on the Design and Construction of Concrete Roads in India
The revival of the cement industry in the country coupled with other factors that have boosted the prospects of constructing road projects in the country has made the transportation engineers to sit together, and re-orient their pavement
Salient Drainage Design Aspects for Roads & Highways
Dr. S. S. Seehra, Chief Consultant, Roads & Highways SNC–LAVALIN SPAN Consultants (Member of the SNC–LAVALIN Group Inc.) & Former Director–Grade Scientist & Area Advisor, Central Road Research Institute, New Delhi
Needed Characterization of Modified Binders in India
The thermo mechanical properties of bituminous binder have a major effect on its subsequent in-service performance. The rheology of conventional binders is relatively simple and behavior can be
A Paradigm Shift
All the developed countries of the world, irrespective of their geographical and ideological barriers, have made a mark in the field of economic development and social upliftment only after putting in place
Operational Maintenance Strategies for Roads and Highways
Connectivity between towns, cities and different areas is an essential component in the development of a Nation. Roads and Railways provide this connectivity. High speed road corridors have been one
Practical Problems of Highway Construction in Black Cotton Soil Area
Black cotton soils are inorganic clays of medium to high compressibility and form a major soil group in India. They are characterized by high shrinkage and swelling properties. This Black cotton soils occurs mostly in the central and western parts
Steps to Improve Roads on Black Cotton Soils
Generally, lands with black cotton soils are fertile and very good for agriculture, horticulture, sericulture and aquaculture. Good irrigation systems exist, rainfall is high and people are affluent in these areas
Structural Strength Enhancement of Rigid Pavement Using Scrap Steel Fibre Reinforcement
The performance of a pavement or overlay depends on the engineering properties of the material used in construction. The application of Steel Fibre Reinforced Concrete (SFRC) as composite matrix is potentially
Polypropylene Fiber Reinforced Precast Concrete Blocks for Roads and Pavements
Roads are important infrastructure providing connectivity between cities, towns and even villages. Though there are large number of unpaved roads connecting interior villages, paved roads are convenient
Durability of Concrete Bridges and Roadways
Much of the bridges and roadways construction is with concrete: reinforced and prestressed. This preference for concrete as a construction material stems from its strength, versatility, easy formability as well as the easy
Concrete Block Pavements for Roads
Road surfaces may be paved or unpaved. Paved roads have flexible, rigid or a combination of the two types of surfaces. Rigid pavements consist of several types. They could be made from concrete; they could
Polymer and Steel Fiber Reinforced Concrete in Pavements
Fiber reinforced concrete is defined as a composite material consisting of concrete reinforced with discrete randomly but uniformly dispersed short length fibers. The fibers can be made of steel, polymer or natural materials. Woven fabrics, long wires, bars, and
4/6 Laning Hyderabad – Vijayawada – Machilipatnam NH–9
India’s NH-9 highway runs from Hyderabad, the capital city of state of Andhra Pradesh, to Machilipatnam, a port on the Bay of Bengal. As part of its National Highways Development Project, an ambitious four-phase program to upgrade
Seismic Rehabilitation of Historic Brick Buildings by Inserting Stainless Pins
We report our research projects on seismic rehabilitation of historic brick buildings, wherein un reinforced walls are strengthened by inserting stainless pins. In strengthening historic buildings, preservation of
