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About UsZHONGTAI HENGBANG Engineering Technology Co., Ltd. is located in the Academician Entrepreneurship Base of Tai'an National High-Tech Industrial Development Zone, Shandong Province. The company is a comprehensive service provider specializing in engineering consulting and design, materials R&D and manufacturing, as well as operations and maintenance. With strong technical expertise and robust R&D capabilities, its products are primarily applied in critical areas such as water conservancy infrastructure projects, transportation infrastructure initiatives, and environmental protection solutions for isolating and preventing leakage from urban waste and highly hazardous industrial solid waste.
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ProductsZHONGTAI HENGBANG Engineering Technology Co., Ltd. boasts production lines sourced from countries including Germany, Italy, Denmark, Belgium, and Switzerland, adhering to rigorous quality management systems and testing standards. We are equipped with advanced testing equipment capable of evaluating tensile strength, creep resistance, UV protection, water permeability, flame retardancy, antistatic properties, chemical corrosion resistance, and oxidation performance.
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Application CasesThe product is primarily used in hydraulic infrastructure projects, transportation infrastructure projects, and environmental protection applications—including the isolation and impermeability of municipal waste and highly hazardous industrial solid waste.
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BlogPrioritizing technological advancement and innovation, our company is committed to fulfilling user needs to the fullest extent possible.
Why do waterproof boards in Guizhou tunnels age? How can we slow down the aging of waterproof boards in the Liupanshui Tunnel in Guizhou?
Release date:
2020-12-04
Generally, for aging tests, inflate the double-seam area with air to a pressure of 0.15–0.2 MPa, ensuring the length between the two weld seams measures 30–60 mm, and maintain this pressure for 1–5 minutes. If the pressure shows no significant drop during this period, the test is considered合格 (passing). For single welds, T-joints, and repair areas, perform a vacuum test using a 50 cm × 50 cm grid. The vacuum pressure must be at least 0.005 MPa, held for 30 seconds; if no bubbles appear in the soapy solution, the test passes. Additionally, indoor tensile strength tests on the welds should exceed that of the base material. Quality inspections should be carried out continuously as construction progresses. First, add anti-aging agents to the raw materials to counteract the effects of external factors such as light, oxygen, and heat—for example, by incorporating适量 of antioxidants, light stabilizers, and dark-colored carbon black. Some companies have successfully added anti-aging additives to polypropylene, resulting in only a 25% loss in strength after four years of direct exposure to sunlight. In contrast, without these additives, the material would lose nearly all of its strength within just 2 to 3 months when exposed directly to sunlight.
Generally, for aging tests, inflate the double-seam area with air to a pressure of 0.15–0.2 MPa, ensuring the length between the two weld seams measures 30–60 mm, and maintain this pressure for 1–5 minutes. If the pressure shows no significant drop during this period, the test is considered合格 (passing). For single welds, T-joints, and repair areas, perform a vacuum test using a 50 cm × 50 cm grid. The vacuum pressure must be at least 0.005 MPa, held for 30 seconds; if no bubbles appear in the soapy solution, the test passes. Additionally, indoor tensile strength tests on the welds should exceed that of the base material. Quality inspections should be carried out continuously as construction progresses. Why does aging occur? And how can we slow down the aging of the waterproof panels in the Liupanshui Tunnel in Guizhou? Let’s analyze this together below:
Delay Generally, for aging tests, inflate the double-seam area with air to a pressure of 0.15–0.2 MPa, ensuring the length between the two weld seams measures 30–60 mm, and maintain this pressure for 1–5 minutes. If the pressure shows no significant drop during this period, the test is considered合格 (passing). For single welds, T-joints, and repair areas, perform a vacuum test using a 50 cm × 50 cm grid. The vacuum pressure must be at least 0.005 MPa, held for 30 seconds; if no bubbles appear in the soapy solution, the test passes. Additionally, indoor tensile strength tests on the welds should exceed that of the base material. Quality inspections should be carried out continuously as construction progresses. Generally, for aging tests, inflate the double-seam area with air to a pressure of 0.15–0.2 MPa at a length of 30–60 mm between the two weld seams, and maintain this pressure for 1–5 minutes. If the pressure shows no significant drop during this time, the test is considered合格 (passing). For single welds, T-joints, and repair areas, perform a vacuum test using a 50 cm × 50 cm grid. The vacuum pressure must be greater than or equal to 0.005 MPa, held for 30 seconds; if no bubbles appear in the soapy solution, the test passes. Additionally, indoor tensile strength tests on the welds should exceed that of the base material. Quality inspections should be conducted continuously as construction progresses.
First, add anti-aging agents to the raw materials to inhibit the effects of external factors such as light, oxygen, and heat—for example, by incorporating适量 of antioxidants, light stabilizers, and dark-colored carbon black. Some companies have successfully added anti-aging additives to polypropylene, resulting in only a 25% loss in strength after four years of direct exposure to sunlight. In contrast, without these additives, the material would lose nearly all of its strength within just 2 to 3 months when exposed directly to sunlight.
Second, implement proactive protective measures in the project—for example, minimize the exposure time of materials to sunlight as much as possible, or cover them with compacted soil and rock (with a recommended thickness of at least 30 cm) or submerge them in deep water.
ZHONGTAI HENGBANG Engineering Technology Co., Ltd. is a comprehensive service provider integrating engineering consulting and design, material R&D and manufacturing, as well as operations and maintenance. With robust technical expertise and strong R&D capabilities, our products are prominently applied in critical environmental protection fields such as hydraulic infrastructure projects, transportation infrastructure initiatives, and the isolation and impermeability solutions for urban waste and hazardous industrial solid waste management. The company boasts advanced production lines sourced from Germany, Italy, Denmark, Belgium, Switzerland, and other countries, adhering to stringent quality management systems and rigorous testing standards. We are equipped with state-of-the-art equipment capable of evaluating key properties—including tensile strength, creep resistance, UV resistance, water permeability, flame retardancy, anti-static performance, chemical corrosion resistance, and oxidation stability—ensuring superior product quality. Furthermore, ZHONGTAI HENGBANG has successfully obtained certifications such as CRCC, ISO 9001, ISO 14001, OHSAS 18000, and MA certificates, along with inspection reports from China’s Ministry of Railways and Ministry of Water Resources, the EU CE certification, and approvals from specialized laboratories in Russia, Australia, the United States, and other regions. We are dedicated to delivering top-quality geosynthetic materials and unparalleled services for projects spanning areas like reinforced soil retaining walls, soft ground stabilization, land reclamation and dike construction/maintenance, hydraulic engineering, slope remediation and ecological restoration, road construction, and mining projects.
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