Water Stop Strip Inspection

Detection range

 

Applicable products: Suitable for various types of building waterproofing products such as water swelling waterproofing strips (product type, putty type, bentonite rubber type), ordinary rubber waterproofing strips, polyethylene swelling waterproofing strips, grouting pipe waterproofing strips, etc., including matching adhesives and installation accessories.

Applicable materials: Covering with natural rubber, synthetic rubber (EPDM, CR, NBR, etc.), bentonite, high molecular weight water absorbent resin, polyethylene, polyester fiber and other special substrates and reinforcement materials for water stop strips.

Applicable scenarios: Used for raw material incoming inspection, finished product factory acceptance, type testing, engineering site sampling, durability performance evaluation, environmental adaptability testing, quality arbitration, and failure analysis; Suitable for quality control of water stop strips in underground engineering, tunnel culverts, water conservancy and hydropower, rail transit, municipal water supply and drainage, building waterproofing and other fields.

Applicable specifications: Covering various cross-sectional sizes (rectangular, circular, irregular), length specifications, and expansion ratio grades of waterstop products.

Testing items

 

(1) Basic performance testing
Appearance quality: Surface smoothness, no cracks, no bubbles, no impurities, no missing glue, no obvious color difference, and the joint connection is firm and reliable.
Dimensional accuracy: length deviation, width deviation, thickness deviation, consistency of cross-sectional dimensions, and conformity testing of profile dimensions of irregular waterstop strips.
(2) Physical and mechanical performance testing
Hardness (Shore A): Determine the hardness of the waterstop substrate and evaluate its deformation recovery ability.
Tensile properties: tensile strength, elongation at break, tensile stress, evaluate the load-bearing and deformation capacity of materials.
Tear strength: Test the material's ability to resist tearing and prevent damage during use.
Compression permanent deformation: Evaluate the shape recovery performance after long-term compression to ensure sealing durability.
Bonding performance: The bonding strength between the waterstop and concrete, the bonding strength of the waterstop's own joint, and the evaluation of installation reliability.

(3) Expansion performance testing (specifically designed for water expansion)
Volume expansion rate: The expansion rate is measured at different immersion times of 24h, 72h, and 168h, and is classified into levels such as ≥ 150%, ≥ 220%, and ≥ 300% according to the model.
Repeated immersion performance: The retention rate of expansion ratio after multiple dry wet cycles is evaluated for long-term stability.
Expansion pressure: Measure the lateral pressure generated when encountering water expansion to verify the waterproofing effect.

(4) Durability and environmental adaptability testing
Hot air aging: Performance retention rate (tensile strength, elongation, expansion ratio) at 70 ℃/100 ℃.
Ozone aging: resistance to ozone cracking under static stretching, suitable for outdoor and harsh environments.
Low temperature flexibility: No cracks when bent at -20 ℃/-30 ℃, evaluate the adaptability of low-temperature construction and use.
Chemical resistant media: acid and alkali resistance, salt water resistance, mud resistance, drinking water resistance, sewage resistance, and other properties.
Salt spray corrosion: Corrosion resistance testing of metal accessories (if any).
Heat resistance: No flow or softening at 80 ℃, suitable for construction environment temperature.

(5) Sealing and waterproof performance testing
Anti leakage pressure: Determine the sealing ability of the waterstop under water pressure, generally requiring ≥ 0.3MPa.
Hydrostatic pressure test: No leakage under continuous pressure to verify the actual waterproof effect.
Water absorption rate: Evaluate the water absorption characteristics of non expanding materials to avoid excessive water absorption affecting performance.

(6) Special performance testing
Putty type waterstop: sag, operable time, curing speed detection.
Grouting pipe waterstop: testing for grouting smoothness, sealing reliability, and pull-out resistance.
Flame retardant performance: Evaluation of the combustion performance level of water stop strips used in special occasions.

GB/T 18173.3-2014 Polymer Waterproof Materials Part 3: Water swelling Rubber

JG/T 141-2017 Bentonite Rubber Water Expansion Waterstop

GB/T 33067-2016 Polyethylene Expansion Waterstop

GB/T 531.1-2008 Rubber, vulcanized or thermoplastic - Test method for indentation hardness - Part 1: Shore hardness tester method

GB/T 528-2009 Determination of tensile stress-strain properties of vulcanized rubber or thermoplastic rubber

GB/T 529-2008 Determination of Tear Strength of Vulcanized Rubber or Thermoplastic Rubber

GB/T 7759.1-2015 Determination of compression set of vulcanized rubber or thermoplastic rubber Part 1: Under normal and high temperature conditions

GB/T 7762-2014 Rubber, vulcanized or thermoplastic - Static tensile test for resistance to ozone cracking

GB/T 1690-2010 Test Method for Liquid Resistance of Vulcanized Rubber or Thermoplastic Rubber

GB 50108-2008 Code for Acceptance of Quality of Waterproofing Engineering in Underground Engineering

JGJ/T 212-2010 Technical Specification for Waterproofing of Underground Engineering

DL/T 5215-2018 Technical Specification for Waterstops in Hydraulic Structures

JC/T 2039-2010 Water swelling waterstop for concrete joints

Zhejiang Gangxin Testing Technology Co., Ltd.

was established in 2011. As a national high-tech enterprise recognized by the Zhejiang Provincial Higher People's Court as a judicial authentication institution for construction engineering quality, we specialize in structural performance testing and safety assessment of construction projects, special equipment, communication towers, electromagnetic environments, large bridges, and building safety appraisal.

The company has more than 100 professional and technical personnel, over 90% of whom hold various medium and senior technical certificates. Equipped with complete testing equipment worth over RMB 10 million, our business scope covers the whole country.