Water Swelling Bentonite Rubber Waterstop Bar for Concrete Joints

Product Description

Product Description

The Hydrophilic Waterstop Strip is a unique rubber-based waterproof material designed for construction joints, post-cast strips, and deformation joints in concrete structures. Its core function is water-activated expansion, utilizing its self-expanding characteristics to block potential capillary pores and gaps, achieving reliable leakage prevention through "water-stopping" mechanism. With simple installation and excellent waterproof performance, it serves as a key component for waterproof sealing in underground engineering projects.

Material

The waterstop strip is primarily composed of multiple composite materials:

   

    *Rubber Base Material: Uses natural rubber, butyl rubber, or synthetic rubber as the base material, providing elasticity and durability.

    *Hydrophilic Components: Incorporates inorganic materials, organic water-absorbing polymers, and high-quality bentonite that absorb significant amounts of water upon contact, triggering volume expansion.

    *Additives: Supplemented with high-viscosity resins and other special additives, manufactured through internal mixing and compounding processes to ensure self-adhesiveness and stable physical properties.

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.

Function
    *Active Sealing: Expands in volume upon water contact, actively filling and blocking all irregular surfaces, cavities, and gaps.
    *Continuous Impermeability: Generates substantial contact pressure after expansion, resisting certain water pressure to achieve reliable water blockage.
    *Self-healing Capability: Continues to absorb water and expand to seal new micro-cracks caused by foundation deformation or settlement, enhancing waterproofing effectiveness.
    *Displacement Adaptation: Maintains water-stopping functionality through its expansion characteristics even when joint displacement exceeds the recovery range of ordinary elastic materials.

Specification

Polymer Waterstop Strip Parameters
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

Detailed picture

Packaging & Shipping

Company Profile

    Hengshui Jingtong Rubber Co., Ltd., located in Hebei Province's Hengshui City, is a professional manufacturer of engineering rubber products. Our product range includes bridge bearings, expansion joints, water stop strips, water stop belts, inflatable cores, building deformation joint device and water plugs, which are widely used in bridge, tunnel, water conservancy, and power engineering projects. The company boasts advanced technology and mature processes to ensure reliable product quality.

    We have a professional technical team and a comprehensive after-sales service system to ensure customers receive high-cost-performance products and attentive service. Hengshui Jingtong Rubber Co., Ltd. is committed to continuous innovation to meet market demands and looks forward to esta  blishing long-term cooperative relationships with customers from both domestic and international markets.