CN102426895A - 一种混凝土收缩应力在线测试材料及其制备方法 - Google Patents

一种混凝土收缩应力在线测试材料及其制备方法 Download PDF

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CN102426895A
CN102426895A CN2011102665294A CN201110266529A CN102426895A CN 102426895 A CN102426895 A CN 102426895A CN 2011102665294 A CN2011102665294 A CN 2011102665294A CN 201110266529 A CN201110266529 A CN 201110266529A CN 102426895 A CN102426895 A CN 102426895A
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concrete
composite material
resin
shrinkage stress
magnetic
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Inventor
吴利民
李宗�
温淑荔
李好新
杨旭辉
宋成贤
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China Railway 18th Bureau Group Co Ltd
Fourth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
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China Railway 18th Bureau Group Co Ltd
Fourth Engineering Co Ltd of China Railway 18th Bureau Group Co Ltd
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Priority to CN2011102665294A priority Critical patent/CN102426895A/zh
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Abstract

一种混凝土收缩应力在线测试材料,由磁性材料和树脂复合成复合材料,磁性材料与树脂的体积含量分别为70~90%,30~10%。本发明利用磁性材料的磁机械性能和树脂的塑性形变性能,将磁性材料与树脂进行复合制备成一种复合材料固定于大体积混凝土表面,因混凝土发生收缩时产生的应力,致使复合材料受力,在复合材料受力的情况下,其磁性发生变化,通过测试磁性材料磁性的变化,利用磁性材料磁场强度与力之间的关系,对混凝土的收缩应力进行准确的跟踪测试,对于混凝土的修补、结构性的预先评估具有关键的指导意义。

Description

一种混凝土收缩应力在线测试材料及其制备方法
技术领域:
本发明涉及一种混凝土性能测试材料,特别涉及一种混凝土收缩应力在线测试材料及其制备方法。
背景技术:
随着国家对铁路工程建设项目的不断投入,大型混凝土工程越来越多,大体积混凝土的收缩开裂问题也越来越普遍,给百年大计的铁路建设带来结构隐患。
大体积混凝土结构裂缝的发生是由多种因素引起的,其中最为关键的为收缩应力。如何对混凝土的收缩进行跟踪,对于混凝土的修补,结构可靠性的预先评估等具有关键意义。
然而目前利用的各种大体积混凝土损伤探测方法,如回弹方法、超声回弹法、拔出法等,鉴于混凝土结构的不均一性而存在不确定的缺点。
发明内容:
本发明的目的在于提供一种混凝土收缩应力在线测试材料,该材料可准确地对混凝土的收缩应力进行跟踪测试,对于混凝土的修补、结构性的预先评估具有关键的指导意义。
本发明的另一目的在于提供上述混凝土收缩应力在线测试材料的制备方法。
如上构思,本发明的技术方案是:一种混凝土收缩应力在线测试材料,其特征在于:由磁性材料和树脂复合成复合材料,磁性材料与树脂的体积含量分别为70~90%,30~10%。
上述复合材料的厚度为1~10mm。
上述树脂采用任何一种树脂。
上述混凝土收缩应力在线测试材料的制备方法为:包括下列步骤:
(1)将磁性材料与树脂以体积百分含量分别为70~90%,30~10%进行复合,利用强力搅拌机搅拌均匀;
(2)加入固化剂进行二次搅拌,搅拌均匀后得到将复合材料;
(3)将上述复合材料以1~10mm的厚度附于混凝土表面;
(4)等待复合材料固化后,根据时间需要利用高斯计测试每个时期磁场强度的变化;
(5)根据所测得的磁场强度变化及磁场强度与应力之间的关系,计算得混凝土收缩应力。
本发明利用磁性材料的磁机械性能和树脂的塑性形变性能,将磁性材料与树脂进行复合制备成一种复合材料固定于大体积混凝土表面,因混凝土发生收缩时产生的应力,致使复合材料受力,在复合材料受力的情况下,其磁性发生变化,通过测试磁性材料磁性的变化,利用磁性材料磁场强度与力之间的关系,对混凝土的收缩应力进行准确的跟踪测试,对于混凝土的修补、结构性的预先评估具有关键的指导意义。
具体实施方式:
下面通过实施例进一步说明本发明。
实施例1:一种混凝土收缩应力在线测试材料的制备方法为:包括下列步骤:
(1)将磁粉与树脂以体积百分含量分别为70%与30%复合,在强力搅拌机中进行搅拌。
(2)加入固化剂后进行二次搅拌,对复合材料中的树脂进行固化,使其具有粘结性。
(3)将搅拌均匀的复合材料以5mm厚度粘附于大体积混凝土表面。
(4)等待2小时后,复合材料固化结束。
(5)根据需要时间,利用高斯计测试复合材料磁场强度的变化。
(6)根据磁场强度的变化,利用磁性材料的磁机械性能,计算混凝土因收缩而产生的应力。
实施例2:一种混凝土收缩应力在线测试材料的制备方法为:包括下列步骤:
(1)将磁粉与树脂以体积百分含量分别为90%与10%复合,在强力搅拌机中进行搅拌。
(2)加入固化剂后进行二次搅拌,对复合材料中的树脂进行固化,使其具有粘结性。
(3)将搅拌均匀的复合材料以3mm厚度粘附于大体积混凝土表面。
(4)等待2小时后,复合材料固化结束。
(5)根据需要时间,利用高斯计测试复合材料磁场强度的变化。
(6)根据磁场强度的变化,利用磁性材料的磁机械性能,计算混凝土因收缩而产生的应力。

Claims (4)

1.一种混凝土收缩应力在线测试材料,其特征在于:由磁性材料和树脂复合成复合材料,磁性材料与树脂的体积含量分别为70~90%,30~10%。
2.根据权利要求1所述的一种混凝土收缩应力在线测试材料,其特征在于:上述复合材料的厚度为1~10mm。
3.根据权利要求1所述的一种混凝土收缩应力在线测试材料,其特征在于:上述树脂采用任何一种树脂。
4.一种根据权利要求1-3所述的混凝土收缩应力在线测试材料的制备方法为:包括下列步骤:
(1)将磁性材料与树脂以体积百分含量分别为70~90%,30~10%进行复合,利用强力搅拌机搅拌均匀;
(2)加入固化剂进行二次搅拌,搅拌均匀后得到将复合材料;
(3)将上述复合材料以1~10mm的厚度附于混凝土表面;
(4)等待复合材料固化后,根据时间需要利用高斯计测试每个时期磁场强度的变化;
(5)根据所测得的磁场强度变化及磁场强度与应力之间的关系,计算得混凝土收缩应力。
CN2011102665294A 2011-09-09 2011-09-09 一种混凝土收缩应力在线测试材料及其制备方法 Pending CN102426895A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113405450A (zh) * 2021-06-01 2021-09-17 北京科技大学 一种基于静磁场检测的岩砼结构体稳定性监测预警方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1162827A (zh) * 1995-11-06 1997-10-22 精工爱普生株式会社 稀土类粘结磁体、稀土类粘结磁体用组合物及稀土类粘结磁体的制造方法
EP1150312A2 (en) * 2000-04-28 2001-10-31 Matsushita Electric Industrial Co., Ltd. Composite magnetic body, and magnetic element and method of manufacturing the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1162827A (zh) * 1995-11-06 1997-10-22 精工爱普生株式会社 稀土类粘结磁体、稀土类粘结磁体用组合物及稀土类粘结磁体的制造方法
EP1150312A2 (en) * 2000-04-28 2001-10-31 Matsushita Electric Industrial Co., Ltd. Composite magnetic body, and magnetic element and method of manufacturing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113405450A (zh) * 2021-06-01 2021-09-17 北京科技大学 一种基于静磁场检测的岩砼结构体稳定性监测预警方法

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Application publication date: 20120425