Wednesday, December 28, 2011


               Fiber reinforced concrete is the most widely using technology since early days. It is a technique of adding single type fiber or a blend of fiber to the mixture of concrete. Steel fibers and synthetic fibers can be added to the mixture which adds the mechanical properties of concrete. Concrete which is compared to other building structure is more brittle and it has poor tensile strength. As concrete is subjected to cracks, fibers are adding to it to get the strength. Mostly used fibers for reinforcement are natural fibers, synthetic fibers, steel fibers and glass fibers. 
Advantages of Fiber Reinforced Concrete
·         It controls cracking of concrete
·         Reduce permeability of concrete and thus reduce water bleeding
·         Higher the modulus elasticity of the fiber, higher will be the loading capacity of material.

Fiber Reinforced composites
Fiber reinforced composites consists of fibers and a matrix. Fibers are the main source of strength. And the matrix is used to bind fibers together in shape and transfers stresses between the fibers. It protects fibers from mechanical as well as external damages. 

Thursday, November 19, 2009

Stirling Engine

A Stirling engine, which is a heat engine of external combustion piston engine type whose heat exchange process allows for the near ideal efficiency in the conversion of the heat into the mechanical movement by the following Carnot cycle as closely as is practically possible with the given materials.
Stirling engine’s invention is credited to Scottish clergyman Rev. Robert Stirling in 1816 who made significant improvements to the earlier designs and took out the first patent on it. Robert Stirling was later assisted in its development by his engineer brother named James Stirling.
The inventors sought to create a safer alternative to steam engines of the time, whose boilers will often exploded due to the high pressure of steam and the inadequate materials. It will convert any temperature difference directly into the movement.
The Stirling engine will works by repeated heating and cooling of usually sealed amount of working gas, usually air or other gases such as hydrogen or helium. This is accomplished by moving the gas between hot & cold heat exchangers, the hot heat exchanger being a chamber in thermal contact with an external heat source, for e.g. a fuel burner, and the cold heat exchanger being a chamber in the thermal contact with an external heat sink, for e.g. air fins.
The gas will follow the behavior described by gas laws which describe how a gas pressure, temperature and the volume are related. When the gas will be heated, because it is in sealed chamber, the pressure rises and this

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Saturday, August 22, 2009

Stamped Concrete

This post is providing a brief idea about the Civil Engineering Topic Stamped Concerete. Stamped Concrete is the process of adding texture and color to the concrete to make it as a resemble stone, slate, brick, cobblestone and many other products found in the nature including wood, shells, fossils, and many more things. This limitless array of the possibilities combined with a great durability and lower cost than the natural products makes the Stamped Concrete as an easy choice for new construction and renovation projects.

The installation consists of the pressing molds into the concrete while the concrete is still in its plastic state. Color is achieved by using the Color Hardeners or Dry Shakes , Liquid Releases or Powder, Acid Stains or Integral Colors. All these products may be combined to create even more intricate designs.

History related with Stamped Concrete:

The Stamped Concrete has been around for about 50+ of years, what it started in the late 50's as a novelty products grew steadily until the mid 70's. When it experienced a huge growth spurt as more architects, contractors and designers became aware of it's benefits, lower costs & natural beauty. Stamped Concrete caused a major stir when it was introduced @ World of Concrete and since 1978 Decorative Concrete has been one of the show's major attractions.

Decorative Concretes

This Civil Engineering Topic is regarding with the Decorative Conceretes. From the last many years, concrete has been used as a simple, effective & low cost surface for all sorts of areas ranging from car parks to the drive ways to commercial freight yards. However, the one factor you rarely hear being praised is its looks. Techniques to improve the aesthetic appeal of the monolithic concrete pavements have been around since the fifties, notably in North America where concrete is possibly the most popular surfacing for patios, drives and 'yards', and in southern hemisphere, particularly Australia. However, it is the only since the mid 1980s that many of these techniques found their way to the North-west European paving market. Decorative concretes have been used to the dramatic effect in the new structural developments such as Trafford Centre in Birmingham, UK, Basilica of Yamoussoukro on Ivory Coast & the new European Parliament building. Dramatic effects are not only achieved in large structures though. Coloured concrete is just as effectively used in architectural pavements, paving stones and the internal flooring Undoubtedly, the most popular prettifying technique we see in the UK and Ireland and other western countries are Pattern Imprint, sometimes known as

Tuesday, August 18, 2009

Self Compacting Concrete

This Civil Engineering Topics is discussing with the Self Compacting Concrete. Concrete is one of the most used construction material in the world and if correctly composed, it can be vary durable and thus save considerable society resources in the maintenance cost. Self compacting concrete is one of the subjects of concrete technology. The various investigations have been carried out and hence the concrete has been used in practical structures. Here we are providing a brief introduction to self compacting concrete which is also known as SCC is given. The definition and motivation for the development of Self compacting concrete have been discussed. The Self compacting concrete has some advantages over the normal concrete and also some disadvantages over the normal concrete. An approach has been made to study the various aspects of the Self compacting concrete, such as types of Self compacting concrete, materials used and testing methods, in detail. This Civil Engineering paper also touches the economical considerations, applications and future development of the Self compacting concrete. A concrete that places itself - 'SCC’ A well-proportioned Self compacting concrete can flow under it’s own weight through and around congested reinforcement filling forms completely and producing a void free mass with no vibration and without segregation problems. When large quantity of heavy reinforcement is to be placed in RC member it is difficult to ensure that the form works get completely filled with concrete that is fully compacted without

Tuesday, July 28, 2009

Smart Materials

While talking about the Smart Materials, its a very interesting Engineering Seminar Topic in the field of Civil Engineering. A new generation of materials called smart materials is changing the way a structural system is going to be designed, built & monitored. Advances in the composite materials, instrumentation and the sensing technology in the combination with the new generation of the actuator systems based on the Piezoelectric ceramics and shape Memory Alloys have made this into possible.

The Shape memory alloys have found applications in a variety of the high performance products. It is ranging from the aircraft hydraulic coupling and electrical connectors to surgical suture anchors. Since the material can be generate high actuation forces in the response to temperature changes, shape memory alloys have the potential to serve as an alternative to the solenoids, which is special significance in the area of the smart
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