JC/T 2559-2020 in English
VALIDAdhesive and rendering mortar for rock wool in external thermal insulation composite systems
- Issued on:2020-04-16
- Implemented on:2020-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$156.00
本标准规定了岩棉薄抹灰外墙外保温系统用粘结砂浆和抹面砂浆的术语和定义、分类和标记、一般要求、技术要求、试验方法、检验规则、产品合格证、使用说明书、包装、运输和贮存。
本标准适用于岩棉薄抹灰外墙外保温系统用粘结砂浆和抹面砂浆。
Introduction
Interpretation of the core content of the standard
| Performance indicators | Bonding mortar | Plastering mortar |
|---|---|---|
| Tensile bond strength (original strength) | ≥600kPa(cement mortar) ≥100kPa(rock wool strip) | ≥100kPa(rock wool strip) |
| Water resistance | ≥300kPa(48h immersion in water) | ≥60kPa(after freeze-thaw) |
| Compression-fold ratio | - | ≤3.0 |
In-depth analysis of material properties
1. Key technologies of bonding mortar
It is composed of cement-based cementitious materials, high molecular polymers and additives, and must meet the following requirements:
- Bond strength with cement mortar≥600kPa
- Operable time 1.5-4 hours
- Strength retention rate after water resistance ≥50%
2. Core performance of plastering mortar
The application of a certain demonstration project shows that when a planetary cement mortar mixer is used to prepare mortar, the qualified rate of 3J impact resistance specimens reaches 100%, and the water absorption is controlled below 420g/m².
Key points for implementation of the standard
Construction quality control
- Interface treatment must adopt the method specified in the standard
- The thickness of the plastering layer is strictly controlled at 4-7mm
- Maintenance environment temperature (23±2)℃, humidity (50±5)%
Solutions to common problems
| Problem phenomenon | Possible causes | Improvement measures |
|---|---|---|
| Insufficient bonding strength | Improper interface treatment Exceeded operating time | Double-coat interface agent treatment Strictly control construction time |
| Surface cracking | Compression-to-bend ratio exceeds standard Improper curing conditions | Adjust polymer dosage Strengthen curing management |
Industry application trend
With the improvement of GB/T 25975's requirements for rock wool products, the performance indicators of supporting materials in this standard are improved by about 15-20% compared with the 2013 version, which is mainly reflected in:
- New bending and tensile crack resistance indicators (≥3.0mm)
- Freeze-thaw resistance strength requirements increased to 100kPa
- Clear preparation specifications for two-component mortar
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
JC 405-1991 in English
Humidification tower for cement industry
1991-02-02 -
JC 506-1992 in English
Silent Crusher
1992-12-21 -
JC/T 312-2021 in English
Methods for chemical analysis of alunite expansive cement
2021-03-05 -
JC/T 544-1994 in English
Measurement and Calculation Method of Heat Balance of Glass Fiber Drawing Furnace
1994-03-26 -
JC/T 770-1989 in English
Standard test method for finish content of woven glass fabric, cleaned and after - Finished
2005-02-14 -
JC 503-1992 in English
linoleum tiles
1992-11-11
