[1]戴 俊,吴 涛,曹 东,等.微波照射后钢纤维混凝土强度劣化研究[J].西安建筑科技大学学报:自然科学版,2014,46(01):6-9,55.[doi:10.15986/j.1006-7930.2014.01.002]
　DAI Jun,WU Tao,CAO Dong,et al.Study on the strength weakening rule of steel fiber reinforced concrete after microwave irradiation[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(01):6-9,55.[doi:10.15986/j.1006-7930.2014.01.002]
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微波照射后钢纤维混凝土强度劣化研究()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
46
期数:
2014年01期
页码:
6-9,55
栏目:
出版日期:
2014-02-28

文章信息/Info

Title:
Study on the strength weakening rule of steel fiber reinforced concrete after microwave irradiation
文章编号:
1006-7930(2014)01-0006-04
作者:
戴 俊1 ;  吴 涛1 ;  曹 东2 ; 高玉柱1 ; 武 宇1
(1.西安科技大学建筑与土木工程学院,陕西 西安 710054;2.四川省地质工程勘察院,四川 成都 610032)
Author(s):
DAI Jun1 ; WU Tao1 ;  CAO Dong2 ;  GAO Yuzhu1 ;  WU Yu1
(1.College of Architecture and Civil EngineeringXi’an University of Science & TechnologyXi’an 710054China 2.Sichuan Geological Engineering Investigation Institute, Chengdu 610032China)
关键词:
微波; 微波加热; 钢纤维混凝土; 强度劣化
Keywords:
microwaves;  microwave heating;  steel fiber reinforced concrete;  strength deterioration
分类号:
TU 25
DOI:
10.15986/j.1006-7930.2014.01.002
文献标志码:
A
摘要:
以抗拉强度为指标，研究微波照射后钢纤维混凝土强度的劣化规律，分别分析功率、照射时间微波作用下，钢纤维混凝土的强度劣化机理. 研究表明：微波功率一定时，照射时间的延长钢纤维混凝土的强度逐渐下降，并且强度劣化速率呈降低趋势，最终钢纤维混凝土完全丧失抗拉强度，微波照射后，喷水冷却有助于钢纤维混凝土强度劣化；当微波照射时间不变时，微波功率对钢纤维混凝土的强度影响与增长照射时间有相同的影响规律.微波照射引起钢纤维混凝土的强度劣化原于混凝土中水泥胶体与钢纤维表面的化学胶着力的下降；钢纤维与混凝土接触表面上的摩擦力的弱化和钢纤维表面粗糙不平产生的机械咬合力减弱.
Abstract:
Based on tensile strength index, this paper studies the law of steel-fiber reinforced concrete strength degradation after microwave irradiation. The relations between the strength reduction and the microwave exposure time and microwave power level are analyzed. The experimental research shows that the longer the steel-fiber reinforced concrete is irradiated, the more its strength reduces under the equal power microwave, and meanwhile the speed of strength degradation is reduced , finally the steel-fiber reinforced concrete lose its tensile strength entirely. The cooling by spraying water after microwave irradiation leads to larger strength reduction of concrete. For the fixed irradiation time, the same result is found. The reason for steel-fiber reinforced concrete degradation induced by microwave irradiation is the decline of chemical bonding force between the surface of steel-fiber and the cement gel in concrete, the weakening of friction on the contact surface of steel fiber and the concrete, and reduction of mechanical interaction of steel fiber by its rough surface.

参考文献/References:

[1] KINGMAN S W, JACKSON K, CUNBANE A, et al. Recent developments in microwave-assisted comminution[J]. Int. J of Mineral Processing. 2004(74):71-83.

[2] OLUBAMBI P A. Influence of microwave pretreatment on the bioleaching behaviour of low-grade complex sulphide ores[J]. Hydrometallurgy. 2009(95):159-165.

[3] HARTLIEB P, LEINDL M, KUCHAR F. Damage of basalt induced by microwave irradiation[J]. Int. J of Minerals Engineering. 2012(31):82-89.

[4] DAI Jun, CAO Dong. Experimental research on tensile strength reduction of concrete caused by microwave irradiation[C]//Proceedings of 2013 2th international conference on civil, architectual engineering. Zhuhai: 2013

[5] DAI Jun. Experimental research on reduction of granite strength induced by microwave irradiation[C]. Montreal, Canada : World Mining Congress, 2013.

[6] 戴俊，孟振，吴丙权. 微波照射对岩石强度的影响研究[J]. 有色金属（选矿部分）， 2014(3): 112-117.

DAI Jun, MENG Zhen, WU Bingquan. Study on impact of rock strength by microwave irradiation[J]. Nonferrous Metals(Mineral Processing Section), 2014(3):112-117.

[7] 曹东. 微波照射下混凝土强度弱化规律的试验研究[D]. 西安：西安科技大学， 2013.

CAO Dong. Research on reduction of concrete strength caused by microwave irradiation[D]. Xi’an :Xi’an University of Science and Technology, 2013.

[8] 王家万，王亚夫. 微波加热原理及应用[J]. 吉林师范大学学报:自然科学版， 2012,11(4)： 142-144.

WANG Jiawan, WANG Yafu. Microwave heating principle and application [J]. Jilin Normal University :Natural Science, 2012,11 (4) :142-144.

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备注/Memo

备注/Memo:
基金项目：国家自然科学基金项目 (51174159)
收稿日期：2013-08-12 修改稿日期：2014-02-21
作者简介：戴俊(1964-)，男，教授，博导，主要从事岩土爆破动力学、隧道工程和微波破岩等方面的教学和科研工作. E-mail：rockblast@126.com
更新日期/Last Update: 2015-10-05