Hasan Rizvi, Sr. Vice President, STP Ltd highlights the importance of waterproofing solutions to be used on Roads & Bridges.

Bridge deck deterioration is one of the most extensive bridge maintenance problems affecting the service life of bridges. One cause of the deterioration is the penetration of moisture and chlorides into the concrete with subsequent corrosion of the steel reinforcement. The use of waterproofing membranes like SuperThermoLay APP, which prevents moisture and chlorides from reaching the concrete by providing a barrier on the top of the concrete deck. The waterproofing membrane is then protected from the traffic by an asphalt overlay and spray or coating of ShaliSeal RSTC.

In India the condition of most of the roads is pathetical, especially during the monsoon. The reason is simple; water entering the roads is the main cause of damage. The life of the roads can be increased by providing proper side drains and water resistant top layer. STP Ltd is one of the oldest companies associated with waterproofing. Over the years STP Ltd has developed specially ShaliSeal RSTC, which is a coal tar based sealer and almost unaffected by water. This product has been applied on various roads and has given incredible results.
Bitumen has been used as a paving material since 18th century. It detoriates under sun’s ultraviolet rays, gets dissolved by petrochemicals, attacked by chemicals, de-icing salts etc.

Presently, bitumen based fog sealer are used in India. Everyone knows bitumen get detoriated by water. Time has come where he/she needs to use a water resistant sealer in roads, the answer is ShaliSeal RSTC from STP Ltd, this is an incredible product set to revolutionise the Indian roads.

Important highlights of ShaliSeal RSTC
• Top coat road slurry for enhancing road life by preventing water ingress.
• This is a refined coal tar based emulsion, designed to protect asphalt pavement.
• Resists ultra violet radiation.
• Resists fuel impregnation.
• Reduces aging of asphalt reduce maintenance.

Colored slurry seal
Approach roads to bridges and toll plaza can be coated with ShaliSeal CSS-a bitumen fails to provide coloured surfaces because bitumen is black due to presence of asphaltene which is required to serve specific purpose.
STP Ltd has developed coloured asphalt with following highlights
• Long lasting colour options
• Increased road safety, higher contrast
• Greater illumination inside tunnels
• Reduced lighting in tunnels,
• Greater creativity for landscape
• Differentiates in pavement functions
• Attractiveness of sport venues
• Durable and easy to maintain.

ShaliPatch EC
Repair of cracks in rigid and flexible pavement, it is self levelling, easily trowel-able into cracks and spall. It prevents percolation of water and other chemicals thus protecting it from wearing off ShaliPatch EC is a 3 component cold applied polymerised elastomeric concrete with excellent adhesion to substrate, used for:
• Crack filling ranging between 5 -50 mm wide in concrete or flexible roads, and
• Surface correction in concrete road or pavement.

Expansion joints are an integral part of structures where thermal movements are pronounced on account of their dimensions. ShaliSeal PU 2K is one of the most durable and economical PU based sealants developed by STP Ltd which is more effective then polysulphide sealant. STP Ltd, an Indian company with over 80 years backing, is a trusted name in the field of coal tar, bitumen and construction chemicals for its quality and services.

Authored by
Hasan Rizvi
Sr. Vice President
STP Ltd
web: www.stpltd.com