Tamil Nadu has a diversified manufacturing sector and features among the leaders in several industries like automobiles and auto components, engineering, pharmaceuticals, garments, textile products, leather products, chemicals, plastics, etc. Tamil Nadu has the Second largest economy in India with a current GSDP of 159,662 (US$2,400). Over 50% of the state is urbanized, accounting for 9.6% of the urban population in the country while only comprising 6% of India's total population.
It ranks first among the states in terms of number of factories and industrial workers. Due to its achievements as an auto production hub, Chennai has been dubbed as the "Detroit of India". Tirupur and Coimbatore are the major textile centres in Tamil Nadu. Tirupur is known as the ‘Knitting City’, while Coimbatore is called the ‘Manchester of South India’. Services contributes to 45% of the economic activity in the state, followed by manufacturing at 34% and agriculture at 21%. Government is the major investor in the state with 52% of total investments, followed by private Indian investors at 29.9% and foreign private investors at 14.9%.
No carbon mark on pavers
Density is about 1.2(authentic weight for use)
Frequent change in color is possible
Very high acid resistance
Very high alkaline resistance
Very high texture imprints
Polymerization of vinyl chloride (monomer) results in the production of polyvinylchloride or PVC, which is its abbreviated name. Pure PVC is white in color. PVC is one of the most used plastic materials in the world. It is economical and highly resistant to chemicals. By adding some additives, it can be made ductile and elastic.
PVC is used for making a variety of products across industries because of its cheap price, easy processing and chemical properties. It is widely used for making construction profiles, medical devices, roofing membranes, credit cards, electric cables, sheets, children's toys, sewerage pipes, gas pipes, clothing and furniture. Around 50 per cent of PVC manufactured is used in construction. There are many grades of PVC manufactured and many regulations are framed for its processing due to health and safety issues.
Asia and Europe are the leading regions in terms of PVC production. China is the key PVC producer in South East Asia and the whole world. Germany in Europe leads production numbers in that region. In India, its futures are listed on NCDEX.
There is now a significant world-wide interest to solve the environmental problems caused by industrial waste and other materials by including such materials in the manufacture of concrete. This technology has been introduced in India in construction, a decade ago, for specific requirement namely footpaths, parking areas etc.
But now being adopted extensively in different uses where the conventional construction of pavement using bituminous mix or cement concrete technology is not feasible or desirable.
The characteristics of concrete containing fine crushed glass during its process, the best ratio of fine crushed glass which leads to higher strength of concrete in order to produce concrete blocks, and the effect of waste glass replacement on the expansion caused by Alkali-silica reaction (ASR).
Concrete paving blocks has been extensively used in many countries for quite some time as a specialized problemsolving technique for providing pavement in areas where conventional types of construction are less durable due to many operational and environmental constraints.
Concrete paver blocks were first introduced in Holland in the fifties as replacement of paver bricks which had become scarce due to the post-war building construction boom. These blocks were rectangular in shape and had more or less the same size as the bricks. During the past five decades, the block shape has steadily evolved from non-interlocking to partially interlocking to fully interlocking to multiply interlocking shapes
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