Road construction is one of the important topics that falls under the civil engineering department. There isn’t any direct information available on the Internet, it seems and this gives us an opportunity to discuss what are the latest and the best technological developments being used for the road constructions.

New technology has been developed by Israel that involves changing of soil density by treating it with a special enzyme. The technology allows using existing roads without having to excavate it to fill the underlying layers with asphalt along with selected materials.

Road Surfacing
Soil improvement in its broadest sense, is the alteration of any property of a soil to improve its engineering performance. This may be either a temporary process to permit the construction of a facility or may be a permanent measure to improve the performance of the completed facility. The result of an application of a technique may be increased strength, reduced compressibility and permeability, or improved ground water condition.

Need for Stabilization of Earth Roads
An earth road’s foundation and wearing surface is composed solely of the natural soil present originally on the site. Soils can be classified into two categories– cohesion less and cohesive soils. It has been observed that regions that are predominantly clayey, do not usually have sandy materials. Clays must be considered as very important and often determining soil component since it has two objectionable qualities that make it the most troublesome of the materials to be dealt with. It swells when subjected to wetting, and shrinks with drying.

Clays and silts are low-grade construction materials, which find use in impervious elements such as cores (dams), cut-offs, and are poorly drained alog with the characteristic of shrinking and swelling. Also, clays when wet lose all strength, and are highly compressible, producing undesirable settlement as sub-grades of highways. Sands, though, having good drainage properties are also not suitable, as they lack cohesion and spread laterally under vertical loads. Thus, either of the two types alone cannot take the traffic independently. Therefore, combination of the two in certain specific proportions and thorough compaction with or without the use of additives may result in a stable sub-grade. A stabilized material may be considered as a combination of binder-soil and aggregates preferably obtained at or near the site of stabilization, and compacted, so that it will remain in its compacted state without detrimental change in shape or volume under the force of traffic and exposure of weather. Several materials have been used as soil stabilizing agents. Of these, the best stabilizer will be the one involving minimum cost and at the same time providing durable effect. The technique is mainly applied in road construction soil, and is termed as Mechanical Stabilization or Granular Stabilization. The process of Mechanical Stabilization is used both for base-courses as well as surface-courses. A good mechanically stable base or surfacing usually consists of a mixture of coarse aggregates (gravel, crushed rock, slag, etc.), fine aggregates (natural or crushed stone, sand, etc.), silt and clay, correctly proportioned and fully compacted. The use of correctly proportioned materials is of particular importance in the construction of low-cost roads. The principle of grading soils may be applied to the improvement of sub-grade soils of low bearing capacity, by adding to them, materials having particle sizes that are lacking, e.g. sand, can be added to clay sub-grades and vice versa.

STP Road Construction
The common method is to use a mechanical stabilization using a correct mix of various soils and mechanically compacting each layer. This ensures that there is minimal pore volume and post laying settling. Rubberising the seal coat ensures prevention of water erosion.

In Clayey soils, enzyme stabilization helps in increasing wear and performance.

Another aspect of the latest development of Road Construction is to protect Asphalt Wearing surface from water, fuel and other volatile substances ingression. STP’s new development of ShaliSeal RS TC - Coal Tar Based Slurry Seal has solved the problem to a great extent. Coal tar, being highly water & fuel resistance, prevent the Asphalt Wearing surface and reduce the periodical maintenance cost substantially. The same is also recommended to use on Granular Sub-base as Prime Coat to protect the sub-base as well as bonding with the bituminous macadam. It is already been recommended by NHAI, IRC other Road Consultant. MNCs like HONDA and many others had also opted for the same for their internal Asphalt Pavement. STP recommend the use of ShaliSeal RS TC over existing Asphalt Pavement every year just before monsoon to enjoy a Pot-Holes Free wearing surface years after years.

There are many other developments being carried out with various bodies in many other aspects and we hope a smooth riding surface throughout the country in near future.
Click Here
To Know More or to Contact the Manufacturer
Please let us know your name.
Invalid Input
Please let us know your Designation.
Please let us know your Contact Number.
Please let us know your email address.
Please brief your query.
Our other Value-Added Services:

To receive updates through e-mail on Products, New Technologies & Equipment, please select the Product Category(s) you are interested in and click 'Submit'. This will help you save time plus you will get the best price quotations from many manufacturers, which you can then evaluate and negotiate.

Invalid Input
Invalid Input
Invalid Input
The demand for structural strengthening of ageing structures is growing rapidly in buildings, industrial structures, infrastructure projects like bridges, dams, etc. Structural Strengthening also

Read more ...

Durability and strength are two most important criteria and requirements for the long-term performance of concrete structures against weathering action, chemical attack and abrasion. Any deficiency

Read more ...

Cement is a key binder component of concrete production in the building industry. It is a complex hydraulic binder, made up of four main clinker components; alite (Ca3SiO5), belite (Ca2SiO4)

Read more ...

FAIRMATE manufactures a complete range of construction chemicals and provides cost-effective solutions and world-class services to the Speciality Construction Chemicals Industry in alliance with leading

Read more ...

Corrosion of concrete is a major issue and many concrete structures on adverse environment have experienced unacceptable losses in terms of serviceability, ultimately requiring replacement

Read more ...

Cement is the most used industrial commodity required for development, but it is also responsible for high GHG emissions; so there is a need to create a balance between the nation’s growth and environment sustainability

Read more ...

Cement concrete is the most consumed materials on the earth next only to water. The ingredients used in preparing concrete are not sustainable. The ingredients are responsible for causing global warming. The most

Read more ...

India’s ready-mix concrete (RMC) market is projected to witness a 7-9% CAGR in the next five years. This growth is predominantly driven by the increased investments in the development of infrastructure throughout

Read more ...

Concrete, being a physical mixture of cement, aggregate (sand and crushed rocks), and water, is the key construction material across the world. There is now a huge demand for infrastructure which has increased concrete

Read more ...

There is a need for technologically advanced concrete admixtures for the ready-mix industry that meet industry codes and meet or exceed the demands of challenging construction applications and adverse placement conditions

Read more ...

High Performance Concrete (HPC) is seeing major applications in the field of civil engineering constructions such as long-span bridges, tunnels, high-rise buildings, huge complexes, highway pavements, and more, since

Read more ...

Concrete being the second largest consumed material after water needs attention towards sustainable construction with an increase in infrastructure. The world is moving towards innovative techniques and methodologies

Read more ...

Co-processing of waste in the cement industry is an advanced and innovative recovery process whereby energy is recovered, and the non-combustible part of the waste is reused as raw material.

Read more ...

Traditional masonry units are not sustainable and eco friendly due to consumption of fuel or cement. It is essential to find sustainable alternatives. This paper reports about preparation of geopolymer bricks, masonry

Read more ...

Geo-polymer mortar (GPM) is proven for its strength, durability and sustainability [2 & 3]; strength of GPM is a function of alkaline to binder ratio, and has an adverse effect on consistence properties of mortar

Read more ...

Comparison of Reinforced and Pre-Stressed Concrete Building Frames This article discusses pre-stressing of concrete to get lighter and slender beam sections for six different four storied concrete building frames of different spans/lengths by the application of post-tensioning

Read more ...

Ready mix concrete (RMC) is the first choice for projects requiring concrete. The term ‘ready mix’ is used to describe a process where concrete is pre-made at a plant and delivered in batches to job sites. It is a convenient

Read more ...

When we talk of Primers that are applied before the paint work, what comes to mind are the Acrylic Primers. However, since the last few years, White Cement-based Primers are gaining popularity amongst the construction

Read more ...

Chemistry is truly relevant for concrete because chemistry controls the life/durability of concrete. It explains why cement hardens and the interaction between cement and its environment. Dr. S.B.Hegde at Udaipur Cement Works

Read more ...

Concrete is considered the world’s most versatile, durable and reliable construction material, next only to water. It is the most consumed material requiring large quantity of cement, fine aggregates, course aggregates

Read more ...

×
Sign-up for Free Subscription
'India Construction Week'
Weekly e-Newsletter on Construction Industry
Get the latest news, product launches, projects announced / awarded, government policies, investments, and expert views.