[1]王珩,钱春香,李敏,等.高强混凝土湿扩散与火灾爆裂关系研究[J].东南大学学报(自然科学版),2003,33(4):454-457.[doi:10.3969/j.issn.1001-0505.2003.04.018]
 Wang Heng,Qian Chunxiang,Li Min,et al.Study on relationship between moisture diffusivity and fire spalling of high strength concrete[J].Journal of Southeast University (Natural Science Edition),2003,33(4):454-457.[doi:10.3969/j.issn.1001-0505.2003.04.018]
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高强混凝土湿扩散与火灾爆裂关系研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
33
期数:
2003年第4期
页码:
454-457
栏目:
材料科学与工程
出版日期:
2003-07-20

文章信息/Info

Title:
Study on relationship between moisture diffusivity and fire spalling of high strength concrete
作者:
王珩 钱春香 李敏 孙伟
东南大学材料科学与工程系, 南京 210096
Author(s):
Wang Heng Qian Chunxiang Li Min Sun Wei
Department of Materials Science and Engineering, Southeast University, Nanjing 210096
关键词:
爆裂 湿扩散 吸水性 硅灰 聚丙烯纤维
Keywords:
spalling moisture diffusivity water absorption silica fume polypropylene fibre
分类号:
TU50
DOI:
10.3969/j.issn.1001-0505.2003.04.018
摘要:
从爆裂机理研究出发,针对高强砂浆等试件,利用明火加热炉,开展了一系列试验.发现爆裂与很多因素有关,例如随温度的升高和时间的延长,爆裂加剧; 硅灰掺合料会使爆裂更易发生; 而聚丙烯(PP)纤维的加入可以抑制爆裂的发生,降低爆裂程度.试验用PCK方法测试了胶砂试件的吸水性,并探讨了吸水性和试件爆裂的关系,结果表明吸水性好的掺有聚丙烯纤维的试件不易爆裂.
Abstract:
From spalling mechanism,a series of experiments with samples aiming at high strength mortar were performed utilizing fuel furnace. The results show that the spalling is related to many factors. For example, with temperature rising or time prolonged, spalling intensify; and spalling is prone to happen when silica fume is added; however, polypropylene(PP)fibre can constrict spalling and reduce the spalling degree. The PCK method was used to measure the water absorption of mortar specimen and the relationship between absorption and spalling was discussed.It is indicated that the specimen with PP fiber, therefore with high water absorption, is not prone to spalling.

参考文献/References:

[1] 孙伟,罗欣,Chan Sammy Yin Nin.高性能混凝土的高温性能研究[J].建筑材料学报,2000,3(1):27-32.
  Sun Wei,Luo Xin,Chan Sammy Yin Nin.High temperature properties of high performance concrete[J]. Journal of Building Materials,2000,3(1):27-32.(in Chinese)
[2] Cerny Robert,Drchalova Jaroslava,Rovnanikova Pavla.The effects of thermal load and frost cycles on the water transport in two high-performance concretes[J].Cement and Concrete Research,2001(31):1129-1140.
[3] Vodak F,Cerny R,Drchalova J,et al.Thermophysical properties of concrete for nuclear-safety related structures[J]. Cement and Concrete Research, 1997(27):415-426.
[4] Cerny R,Drchalova J.Measuring the moisture diffusivity of board materials[A].In: Proceeding of the CIB W40 Meeting[C].University of Porto,1995.147-156
[5] 涅克拉索夫 I.耐热混凝土性能研究[M].北京:中国工业出版社,1963.13.
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备注/Memo

备注/Memo:
基金项目: 教育部骨干教师计划资助项目、江苏省自然科学基金资助项目(BK99016)和国家自然科学基金重点资助项目(59938170).
作者简介: 王珩(1979—),男,硕士生; 钱春香(联系人),女,教授,博士生导师, cxqian@seu.edu.cn.
更新日期/Last Update: 2003-07-20