GB/T 18244-2022 in English
VALIDTest methods for weathering resistance of building waterproof materials
- Issued on:2022-07-11
- Implemented on:2023-02-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
《GB/T 18244-2022建筑防水材料老化试验方法》由TC195（全国轻质与装饰装修建筑材料标准化技术委员会）归口，TC195SC1（全国轻质与装饰装修建筑材料标准化技术委员会建筑防水材料分会）执行，主管部门为中国建筑材料联合会。
Introduction
Analysis of the core changes in the new standard
Compared with the 2000 version of the standard, GB/T18244-2022 has been mainly updated: ozone aging and carbon arc lamp methods have been deleted, the test curing conditions have been optimized to "temperature (23±2)℃, humidity 40-60%", and the test verification method for artificial aging has been added. The thermal aging temperature of polymer materials is uniformly set to 80℃±1℃, and the irradiance measurement unit adopts the international standard of "kW·h/m²·nm".
Systematic comparison of aging test methods
| Test type | Applicable standards | Core parameters | Data validity |
|---|---|---|---|
| Hot air aging | Clause 5.3.1 | Asphalt 70℃/Polymer 80℃±1℃ | Grade A fit |
| Xenon arc lamp aging | Clause 6.7.1 | [email protected]/m²·nm | Grade B+ acceleration rate |
| Fluorescent UV aging | 7.7.1 Clause | [email protected]/m²·nm | C-level material verification |
Analysis of key technical elements
Innovation of maintenance conditions
Introduction of the "double darkroom control" system: Group 1 initial test/Group 2 continuous aging/Group 3 darkroom verification, the retention rate calculation adopts the "contemporaneous environmental reference method" to compensate for the influence of natural decay of materials.
Accelerated aging time conversion
According to the formula: {"radiation energy" He= Ec×t}: When the anti-dew type coil requires 5000kJ/m²·nm of 340nm cumulative irradiation, 1042 hours of continuous experiment is required under xenon lamp conditions (converted under standard irradiance conditions).
Project Implementation Suggestions
- Mineral particle surface coil testing requires a >200mm clear spacing anti-reflection device
- Black mark temperature control takes precedence over black board temperature to compensate for the »±5℃ measurement error
- The water quality of the water spray system must meet the industrial pure water standard with a conductivity of ≤5μS/cm
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