Technavio’s analysts forecast the global waterproofing chemicals market to grow at a CAGR of 5.93% during the period 2016-2020.The market is divided into the following segments based on application: Roofing, Walls, Building structures and Landfills and tunnels. In regard to the Indian market, according to “India Construction Chemicals Market Fore-cast & Opportunities, 2018”, the Indian construction chemicals market is forecasted to witness exponential growth, especially in its admixtures segment in the next five years. The market revenue for the Indian construction chemicals market is expected to reach up to USD 1.13 Billion by the end of 2018. In 2012, the admixtures and water-proofing systems constitutes more than 60% of the overall construction chemicals market revenues.
Different areas of application of waterproofing
The construction industry has had technological advances in waterproofing materials, including integral water proofing systems and more advanced membrane materials. Integral systems such as hycrete work within the matrix of a concrete structure, giving the concrete itself a waterproof quality. Discussed below are few of the areas of application of waterproofing system.
Bridge Decks Waterproofing:
A modern mix of membranes, coatings, sealants, and waterstops are used to help these structures safely carry traffic for as long as possible. While all parts of a bridgefrom the footings and piers to the surface of the road deckuse specialty products to keep water out, this article will focus on waterproofing the road deck. Layers of Protection For the vast majority of bridges and overpasses, the bridge deck is built as two separate layers. The lower structural deck is typically high-strength, steel reinforced concrete designed to last the life of the bridge. The upper deck, or wear surface, is designed to be replaced every few years.
Most bridges built in recent decades use epoxy-coated rebar instead of plain red iron. Sacrificial anodes are attached to the rebar mats for cathodic protectionso that naturally occurring electrical currents will erode the anode and not the bridge steel. After the structural deck is in place, it is sealed with spray membranes, sheet goods, or some combination of the two for additional protection. Finally, after the actual road surface is in place, an additional layer of water-repellant sealer is applied.
To increase the durability of reinforced concrete bridges, all concrete movement and construction joints, plus the bridge decks have to be waterproofed to prevent serious damage to the concrete, or to the embedded steel reinforcement. Due to dynamic loading, the bridge decks must be protected with elastic, crack-bridging systems to accommodate any movement and maintain the protection. Some of the common advantages of this system are: Elastic, crack-bridging properties, especially at low temperatures, Resistance to chlorides and automotive chemicals such as fuel, oils and hydraulic fluids. Easy to install and ac-commodate variations in level and substrate conditions, Fast application to reduce traffic closure times.
Swimming Pool Waterproofing:
This system provides the waterproofing of swimming pools or water tanks, both external and internal. By the use of two-component elastic, liquid waterproofing membrane, used in combination with Safety Joint Roll, an elastic band for the treatment of critical areas such as horizontal and vertical joints and angles, and Polites, a reinforcement fiberglass mesh characterized by the presence of special anti-floa-ting wings.
As finishing for the waterproofing layer thus obtained it is used the epoxy coating, Swimming, a liquid finishing alternative to the common tiles or mosaics, to be applied directly onto the waterproofing layer. As an alternative to the epoxy finishing, the waterproofing layer can be easily covered with ceramic tiles and all other coatings traditionally used for swimming pools. Some of the common materials for this type of waterproofing are, epoxy resin, elastic tape, glass fibre armor, concrete membrane, epoxy paint etc.
Efficient waterproofing of roofs and terraces can be achieved by adopting proper construction practices. It is essential that no rainwater stagnates on the roof. A proper slope and adequate number of drainage outlets can achieve this. Roof waterproofing is one of the essential steps of roof care. One should remember that waterproofing of flat roofs and waterproofing of pitched roof need different materials and different method of installation.
Quality of roof waterproofing influence on its insulation, security and exploitation of the entire roof. Don’t forget that moisture can also appear in the form of steam collected in a roof space, not only from the outside. You should consider this while choosing the waterproofing type. There are the following roof waterproofing systems according to the method of their use: waterproofing perforated film (hydro barrier), anti-condensate film, polymer membranes, hydrophilic rubber; surface waterproofing (acrylic, bitumen, silicone rubber, polyurethane mastic, etc), sprayed waterproofing materials (poly urea, acrylic formulations, the liquid rubber, etc), injecting materials (polyurethane, silicate resins, cement, emulsions, etc),penetrating materials.
Dams are constructed for different purposes, but all of them have the target to store water. In countries with sufficient water the gained water is used to produce electric energy, in dry countries the water serves as drinking water or for irrigation of agricultural areas. Loss of water always means a reduction of productivity and may even endanger the base of existence of the population.
Only earth dams had received a watertight core but a great number of concrete dams are loosing water through cracks. There are different technologies to repair the concrete face of the dam but one of the most reliable and economical is the application of a waterproofing geomem-brane. The choice of geomembrane and the way of fixation for the waterproofing system is a very important issue to receive a long living water tightness of the dam.
Waterproofing geomembrane systems are used for waterproofing of dams at the to restore watertightness to the entire face, or at leaking zones, or at cracks. Some of its benefits are :stops water infiltration, bridge joints and large cracks, prevents the forma-tion of uplift pressures, provides freeze/ thaw protection to the face, assists in re-tarding alkali-aggregate reaction (AAR) etc.
The nanotechnology has been a matter of interest for much long. The recent innovations of the system has produced organo-silicon products that are highly durable. The building materials are in-hibited in having water seepages and water leakages. There has been several attempts in developing technology that could address this issue. The issue of structural strength of the concrete building materials due to alkali- silica reaction is also a serious one and this problem needs to be add-ressed too. Moreover, construction mate-rials hydroxyl nature makes waterproofing difficult for structures often. To mark this serious issues nanotechnology could be used tactfully. A group of Iranian researchers a nanotech material which is gerren and environment friendly. The developed product consist of organo=silicon-polymer at nanometric dimensions. The product has been developed using green and non corrosive heteropoly acid as a catalyst. The group of researchers have used a specific type of organosilicon polymer at nanometric dimension as the waterproof coating. Then the calculated the optimized condition by architecting an experiment with sol-gel method. Several materials such as concrete, cement etc. could be protected superiorly by the use used by the implementation of this research work.
Construction chemicals are now in application for bridge waterproofing. Super-plasticizers (Polycarboxylate Ethers) is perhaps the most in demand material in this regard. The specialty of this chemical lies in the correct implemented ratio of number of bristles and to the right polymer backbone. There is no standard formulation of this product on the basic remains the same. The different criteria is designed on the basis of the need of the project to achieve the desired property of the concrete. The prin-ciple advantage of this system is rheoplastic and Self Compacting concrete (SCC), Very High Strength (VHS), High Durability, more accelerated strength development etc. This system is a must for all types of bridge construction where structural efficiency is of prime requirement.
RCC is also another prime construction chemical, highly apt for bridge waterproofing. The chemical properties of it offers modulation and durability. These aspects of the concrete perfectly fitted for the brid-ges. New generation concrete adhesives could be strategically implemented using mix design and correct modulation. Dura-bility of the concrete can be further enhan-ced by protective coatings and impregnation that could easily form a barrier which is chemical by nature against the ingress of the water and chlorides. Implementation of the correct concrete protection system helps in mitigating corrosion in bridges.
According to marketsandmarkets.com reports waterproofing membranes are the fastest-growing commercial roofing mem-branes and have gained wide acceptance in different industries for their performance, and installation advantages at competitive cost. Roofing & walls is the biggest water-proofing membrane application and is projected to be worth USD 13.02 Billion by 2021. The waterproofing membrane mar-ket is growing on a rapid pace mainly due to the growing building & construction indus-try in most of the regions. There is an increa-sing demand for waterproofing membranes due to increasing governmental investments on infrastructure developments in majority of the developing countries of the regions. In addition, increasing waste & water management activities in the countries have also triggered the demand for waterproofing globally. The waterproofing market demand is here to stay.
Information and image Sources:
– Sika India Pvt. Ltd.
– TechnoNICOL India Private Limited
– RMG Polyvinyl India Limited
– Talrak Construction Chemicals Pvt. Ltd.
– BASF India Limited
– Mc Bauchemie India Pvt. Ltd.
– Polygomma Industries Pvt. Ltd.
– Polygel Industries Pvt. Ltd.
– STP Ltd.
– Cera-Chem Pvt. Ltd.