主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2020, Vol. 39 ›› Issue (11): 1499-1503.

• • 上一篇    下一篇

正交胶合木墙板火灾炭化试验研究

彭磊1，邱培芳1，崔海浩1，袁露2   

  1. 1. 应急管理部天津消防研究所，天津300381；2. 应急管理部消防产品合格评定中心，北京100071
  • 出版日期:2020-11-15 发布日期:2020-11-15
  • 作者简介:彭磊（1980-），男，应急管理部天津消防研究所副研究员，博士，主要从事装配式钢结构及木结构建筑防火研究，天津市南开区卫津南路110 号，300381。
  • 基金资助:
    国家重点研发计划项目（2018YFC0807600）

Experimental study on charring of crossliaminated timber exposed to standard fire#br#

PENG Lei1, QIU Pei-fang1, CUI Hai-hao1,YUAN Lu2   

  1. 1.Tianjin Fire Science and Technology Research Institute of MEM, Tianjin 300381, China; 2.Certification Center for Fire Protection Products of Mem,Beijing 100071,China
  • Online:2020-11-15 Published:2020-11-15

摘要：

采用耐火试验炉，开展了正交胶合木墙板试件在标准火灾条件下的炭化试验，研究正交胶合木墙板内部不同深度处的温度变化曲线、炭化深度和炭化速率等变化规律，分析不同胶粘剂对层板脱落和炭化速率的影响，对比层板脱落或不脱落情况下炭化深度的计算方法。结果表明，对于采用普通PUR 胶的试件，第一层层板50～60 min 时发生脱落，脱落后试件的炭化速率明显变大；采用耐热型PUR 胶的试件，未出现明显的层板脱落现象，炭化速率恒定，与欧洲标准中的普通木结构的名义炭化速率0.65 mm/min 相当。

关键词: 正交胶合木, 炭化速率, 胶粘剂, 层板脱落, 耐火极限

Abstract: Experimental tests have been carried out to study the charring of cross- laminated timber （CLT）wall panels under standard fire exposure, by using a fire- resistance furnace. The temperature curves at different depths within the CLT panels,charring depths and charring rates are examined. The effect of different adhesives on delamination and charring rate are studied.Methods of calculating the charring depth of CLT with or without delamination occurrence are also presented and discussed.The results show that the CLT panels manufactured using normal PUR adhesive had the first layer fall-off at about 50~ 60 min, and the charring rate increased considerably after falloff of the first layer. However, the CLT panel smanufactured using heat- resist PUR adhesive exhibit no obvious delamination,and the charring rates remained constant during tests, which are consistent（0.65 mm/min）with the design value of normal timber structures as given in Eurocode 5.

Key words: cross-laminated timber（CLT）, charring rate, adhesive, layer delamination, fire-resistance rating