PVC Waterstops
Water Stops are flexible Plastic strips which provide a physical barrier to Water at concrete joints, mostly in basements, Water retaining structures like Water tanks, Swimming pools, structural foundations & other below ground level constructions. Waterstops are also termed as Water Bars, seals construction joints. A typical waterstops have two identical half on both side of a central bulb. These additional extensions are provided with the aim of increasing path length for water entering behind the edge of water stop.
Compounding of Waterstops:
Waterstops are manufactured from Anti-Ageing customized plastic compound with PVC as a base polymer and exhibiting required properties like High Elasticity & Tensile Strength, Immune to Corrosion, Excellent weather resistant, Unaffected by acids, alkalis, metals salts and other chemicals, Lower water absorption, Withstand high Hydrostatic pressure, Can bear shocks of heavy turbines, Earth quakes, Floods.
Application in construction Industry
PVC Waterstops act as sealant at RCC Masonry concrete joints & prevent any seepage of water in or out through joints.
PVC Water stoppers withstand expansion or contraction movement at joints and take care of any deflection or displacement arising due to change in temperature, differential settlement of foundation, Geo disturbances causing Seismic forces like earth quack, thus eliminating danger of cracks.
Selection of appropriate Waterstop:
Ribbed Type- multipurpose waterstop design, used where differential settlement of poured concrete is expected and a firm grip in concrete is desired.
Dumbbell Type- Greater variation in temperature causes expansion or contraction of joints, Dumbbell type waterstop is suggested for these sites.
Kicker (Surface) Type: these are externally placed and are use where embedded types can not be used due to interference of steel reinforcement.
Installation procedure:
Water Stoppers are tied to steel frame work through eyelets by means of small wires (same being depicted in the adjacent figure), certain metal clamps meant to grip the water stop seal and keep it in proper position.
Firstly one half of the waterstop is embedded in the concrete leaving the second half extended. Second half is also embedded leaving the centre bulb free for expansion and contraction movements.
Area of Application:
Public Utilities : Bridges, Road Embankments, Tunnels, Water Tanks, Swimming Pools, Water Filtration plants, Swage Plants, Clarifiers, Dams, Canals, Aqueducts, Reservoirs, Irrigation Projects Cooling Towers.
Building: Basements, Foundations Slabs, Masonry Joints, Terraces, Retaining Walls, Overhead & Underground Water Tanks, Skyscraper.
Industries: Chemical Plants, Fertiliser Steel, Waste Treatment Plants, Thermal & Hydro Power Stations, Atomic Reactors, Shipyards & Docks.
Precautions during water stop installation:
They are vulnerable to get damaged during construction.
Compaction of concrete around waterstop should be taken care otherwise it can dislocate & could lead to a risk of honeycomb formation which may lead to leakage through concrete itself rather then through joint.
Methods for Jointing PVC Waterstops with Heater Blade:
Water Stoppers can be join on site with a simple electrical heater blade.
Water Bars of same width & design should be sharply levelled at edges using a knife.
Turn on the Electric Heater Blade and wait will it become hot.
Place the waterstops on both sides of heater blade & press it until it melts but without burning.
Remove the heater blade upward.
Joint the molten end quickly & hold them together firmly for approximately 20-30 seconds.
Rubber Water-Stop for Road Railway Highway Tunnel
Take rubber as the main raw material, mixed with various additives and fillers, vulcanization molding process, according to the usage it could be divided into deformation joints water-stop, construction joints water-stop, steel edge water-stop, according to the setting position it could be divided into amid-bury type rubber water-stop back-stick type rubber water-stop.
Description of rubber water stop:
Take rubber as the main raw material , mixed with various additives and fillers, vulcanization molding process , according to the usage it could to the usage it could be divided into deformation joints water-stop , construction joints water-stop , steel edge water-stop, according to the setting position it could be divided into amid-bury rubber water-stop back-stick type rubber water-stop.
Specification :
B type : water stop strip, suitable for easy deformation joint
S type : water stop strip suitable for construction joint
J type: water stop strip suitable for joint which request anti-aging.
Property of rubber water stop:
Elastic deformation happens under high load pressure for the rubber high elasticity, therefore it can prevent leakage effiviently, fasten sealing, also reduce shaking as a result, it can ensure the buildings' lifetime . good flexibility, abrasion resistance, aging resistance and tear resistance, strong ability to adapt to deformation , good waterproof performance, temperature ranges from -45 centigrade to +60 centigrade.
Application of rubber water stop:
Widely used in concrete struction , such as : dams, reservoirs, underground ,culverts, tunnels and other underground projects.
Production Standard:
GB181731.2-2000 < Polymer water- proof material Part 2 , waterstop>
< Provisional technical condition of waterproof material for railway tunnel use Part 2, waterstop>
Specification of Rubber Water-Stop for Road Railway Highway Tunnel
B type: Water stop strip, suitable for easy deformation joint.
S type: Water stop strip suitable for construction joint.
J type: Water stop strip suitable for joint which request anti-aging.
Property of Rubber Water-Stop for Road Railway Highway Tunnel
Elastic deformation happens under high load pressure for the rubber high elasticity, therefore it
Can prevent leakage efficiently, fasten sealing, also reduce shaking, as a result, it can ensure the
Buildings' lifetime. Good flexibility, abrasion resistance, aging resistance and tear resistance,
Strong ability to adapt to deformation, good waterproof performance, temperature ranges from
-450C to +600C.
Application of Rubber Water-Stop for Road Railway Highway Tunnel
Widely used in concrete structures, such as: Dams, reservoirs, underground, culverts, tunnels and
Other underground projects.
Production Standard of Rubber Water-Stop for Road Railway Highway Tunnel
GB 181731.2-2000 <Polymer water-proof material Part 2, waterstop>
< Provisional technical condition of waterproof material for railway tunnel use Part 2, waterstop>
FAQ
What is geosynthetics ?
Geosynthetics form a perfect erosion control fabric used extremely widely in civil engineering to stabilize and reinforce slopes and soil under or next to roads, railways, dams, water reservoirs etc.. They can be easily applied which minimizes the time of construction, as well as they limit the resources and materials necessary.
What kinds of geosynthetics we have ?
Non-woven geotextile, geogrids, geocells, GCL, Geomembranes, Geonets, Geocomposites etc .
What is the geosynthetics used for ?
Hydraulic
Lagooning and Water Treatment, Ornamental Ponds, Golf Courses
Aquaculture and Desalination,Water Lagoons,Tanks, Reservoirs, Liquid Waste,Floating Cover Solutions, Drainage and Filtration
Environment
Tailing ponds, Leach mining,Landfills,Landfill Capping,Protection against corrosion,Vertical Barriers
Civil Works
Erosion Control,Secondary Containment,Tunnels,Linear and Surface Works,Consolidation of Margins,Soil Reinforcement,Soil Separation.
Building - Parkings,Roofing,Soundproofing
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