Hydrophilic Bentonite Rubber Water Stop for Concrete Joints in Sewage Treatment Plants

• Customization: Available
• After-sales Service: Installation Guide
• Application: Outdoor, Concrete Joints
• Model NO.: JT-W11
• Certification: CE, ISO, RoHS
• Shape: Strip
• Expansion Rate: 150%-600%
• Colour: Black/Red/Customized
• Model No: Pn/Pz
• Surface Treatment: Film Coated
• Tensile Strength(MPa): ≥22
• Density(Mg/M3): 1.1-1.3
• Elongation at Break(%): 400
• Working Temperature: -40-120 Celsius
• MOQ: 100 Meters
• Transport Package: Carton Packaging
• Specification: Customized
• Trademark: HengJingGong
• Origin: China
• Production Capacity: 50000piece/Year
• Package Size: 35.00cm * 35.00cm * 3.00cm
• Package Gross Weight: 1.000kg

Product Description

Product Description

Water-Swelling-waterstop is a new type of watertight sealing strip made mainly of hydrophilic polymers (e.g., super-absorbent resin or modified rubber). Inside the material are a large number of hydrophilic groups (carboxyl, hydroxyl, etc.). On contact with water, osmotic pressure, hydrogen bonding and chain-unfolding make the strip swell rapidly to 2–6 times its original volume, forming a gel-like elastic body that plugs the leakage paths in concrete construction joints, deformation joints or around wall-penetrating pipes, thus realizing a "stop-water-with-water" seal.
1. Main types
    *Putty type (PN/BW): usually rectangular, soft and self-adhesive, swelling 150 %–300 %, suitable for irregular gaps or post-construction repairs.
    *Molded type (PZ/BF): vulcanized and shaped, with better rebound and compression resistance, swelling 150 %–600 %, widely used in new underground works, tunnel segments and other long-term pressure locations.
2. Key properties
    *Swelling pressure 0.5–1.5 MPa, establishing a dynamic balance with groundwater pressure.
    *Swelling rate can be adjusted (slow-swell type ≤ 50 % of maximum within 186 h), preventing displacement before concrete pour.
    *Ageing-resistant, non-toxic, no leachate, stable after long immersion.
    *Self-adhesive or nail-fixed, easy to install, capable of self-sealing micro-cracks caused by subsequent settlement.

Applications
Subway tunnel construction joints, hydraulic dam expansion joints, basement wall and floor joints, utility tunnel deformation joints, wastewater treatment plant biochemical tanks, reservoirs, underground parking, civil defense works, diaphragm walls, pile head waterproofing, nuclear containment structures.

Features & benefits:

 *Quality sodium bentonite clay and rubber materials.
*Moisture activated.
*Strong, durable with high cost effectiveness.
*High water absorption with excellent compression seal.
*High expansion control ability for preserving its integrity.
*Controlled internal pressure in surrounding concrete to avoid spalling and cracks.
*Withstand high water pressure.
*Capable to self-healing.
*Easy and fast to transport and install.
*Easy to joining.
*Non toxic

Product Types

Based on material and form, main categories include:

    *Putty Type Waterstop: Features a rubber-clay texture, soft and highly moldable. Exhibits relatively slow expansion speed with strong mobility and replenishment capability, demonstrating remarkable self-healing functionality to automatically seal new cracks caused by settlement.
    *Product Type Waterstop: Manufactured primarily from rubber base materials through vulcanization processes. Offers higher strength and elasticity with greater water absorption expansion rate (typically 150%-600%), maintaining excellent rubber elasticity after expansion.

Types:

Physical properties	Test method	Result
Color	-	Black
Specific gravity	ASTM D-71	1.35 ± 5%
Hydrocarbon content	ASTM D-4	47% (min)
Volatile matter	ASTM D-6	1% (max)
Penetration, cone at 77°F, 150 gm, 5 sec.	ASTM D-217	40 mm ± 5%
Application temperature	-	-10°F to 125°F
Service temperature	-	-30°F to 180°F

Other bentonite waterstops for specific applications are also available in our company as shown follow:

Bentonite waterstop with expanded metal

Bentonite waterstop with expanded metal is a new type water sealing product. The added expanded steel mesh (or nylon mesh as your request) effectively enhances the tensile strength of the waterstop and improves the overall construction quality.

Bentonite waterstop with grouting pipe

The perfect match of bentonite waterstops and grouting pipes extremely improve the performance of the water-proofing capability. Once the leakage of water occurs, you can plug the crack through pouring chemical grout into the pipe, instead of slotting and drilling a hole on the construction surface.

Sizes:

*Width: 10 mm, 15 mm, 20 mm, 30 mm, 40 mm, 50 mm.
*Height: 10 mm, 20 mm, 30 mm, 25 mm, 40 mm, 50 mm, 60 mm.
*Color: black, red and other colors also can be customized.
*Note: Other specifications also can be customized.

Specification

NO.	ITEM	Result
		PN-150	PN-220	PN-300
1	Expansion rate/%≥	150	220	300
2	Flow at High Temperature (80℃×5h)	No fiow	No fiow	No fiow
3	Low temperature test (-20℃×5h)	No crack	No crack	No crack
4	Peel strength	0.05MPa
5	Shear Strength	1.0MPa
6	Hydrostatic Pressure	1.2MPa

Physical properties		PZ-150	PZ-250	PZ-400	PZ-600
Hardness (shore A)		42±7	42±7	45±7	48±7
Tensile strength		3.5 Mpa (min)	3.5 Mpa (min)	3 Mpa (min)	3 Mpa (min)
Elongation		450% (min)	450% (min)	350% (min)	350% (min)
Expansion rate		150%	250%	400%	600%
Repeated water immersion test	Tensile strength	3 Mpa (min)	3 Mpa (min)	2 Mpa (min)	2 Mpa (min)
	Elongation	350% (min)	350% (min)	250% (min)	250% (min)
	Expansion rate	150%	250%	300%	500%
Low temperature bending (-20°C*2h)		No crack	No crack	No crack	No crack

Installation

Packaging & Shipping

Company Profile

FAQ

1.When can I get the quotation?
A:We usually quote within 24 hours after we get your inquiry.

2.How long can I expect to get the sample?
A:The samples will be ready for delivery in 5-10days. The samples will be sent to you via express and arrive in 5-7days.

3.How long is the delivery time
A:Usually 10-15 days, depending on the quantity purchased.

4.How can I get a sample to check your quality?
A:After negotiating the price, we will provide you with samples for testing.

5.what can you buy from us?
Bridge Bearing Pad,Seismic isolation bearing,Expansion Joint,Rubber Inflatable Airbag,Waterstop Belt/Strip,Steel Expansion Joint,Butyl Tape

6.What's payment term?
A:T/T, L/C at sight, Western Union

7. Do we have quality guarantee?
Of Course!.
--from raw material to manufacturing, we have rigid quality control.
--before delivery, we have strict quality inspection.
--Third party inspection is also available at your request.
--We also have ISO, CE certificates.