CN1483699A - 接地导电混凝土 - Google Patents

接地导电混凝土 Download PDF

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CN1483699A
CN1483699A CNA021396191A CN02139619A CN1483699A CN 1483699 A CN1483699 A CN 1483699A CN A021396191 A CNA021396191 A CN A021396191A CN 02139619 A CN02139619 A CN 02139619A CN 1483699 A CN1483699 A CN 1483699A
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CN1194930C (zh
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曾永林
何夏萍
欧桂芳
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Mid South Hydroelectric Investigation & Design Institute Of China Hydropower Engineering Consulting Group
Standard New Technology Co Of Zhongnan Survey Design And Research Institute Of State Power Co
PowerChina Zhongnan Engineering Corp Ltd
Hydrochina Zhongnan Engineering Corp
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Central South Survey And Design Academy National Electric Power Corp
Tugao New Technology Co Central China Survey And Design Academy National Elec
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Abstract

本发明公开了一种接地导电混凝土,旨在解决现有的普通混凝土和导电混凝土不适合作接地导电材料的问题,该接地导电混凝土由下列组分和重量百分比组成:水泥45-70,石墨15-35,膨胀剂8-10,熟石膏7-10,将上述材料按配方称重,放入搅拌机充分搅拌均匀,即为成品。本发明的导电混凝土干燥状态下电阻率小于6Ω.m,潮湿状态电阻率ρ≤5Ω.m,冲击电流耐受ΔR%≤20%,工频电流耐受ΔR%≤20%,埋地时对金属接地体的平均腐蚀率≤0.05mm/年,纯降阻剂对金属接地体的平均腐蚀率≤0.03mm/年,本发明的导电混凝土不仅可用作多种接地导电材料,而且可用作抗静电建筑材料,电磁屏蔽建筑材料,开关合闸电阻材料,电热器发热材料等。

Description

接地导电混凝土
技术领域
本发明涉及一种混凝土,更具体地说是涉及一种接地导电混凝土。
背景技术
混凝土是一种用途广,用量大的建筑材料。受水或潮湿土壤浸渍的混凝土,由于毛细管的作用而吸收水份,具有一定离子导电性能,其电阻率一般在于0-470Ω.m范围内,潮湿和干燥状态的混凝土,电阻率差别极大,两者之比可达成100倍以上,因此,普通混凝土不能作接地导电材料。CN1130604A公开了一种由石墨粉、短切碳纤维、混凝土样强纤维、混凝土减水剂、水泥、电解质等组成的导电混凝土,是建筑电加热供暖的较理想的电发热材料。但是该材料配方较复杂,制造成本较高,对金属还有腐蚀作用,因而不适于作接地导电材料。
发明内容:
本发明的目的在于提供一种配方简单、制造成本低、对金属几乎无腐蚀作用、适于作各种气候地质特别是干旱地区接地导电材料的导电混凝土。
本发明的导电混凝土由下列组分和重量百分比组成:水泥45-70,石墨15-35,膨胀剂8-10,熟石膏7-10;优选的配比为:水泥55-65,石墨20-25,膨胀剂8-10,熟石膏7-10;更优的配比为:水泥55,石墨25,膨胀剂8,熟石膏10。
水泥为普通硅酸盐水泥,石墨宜用高纯石墨,石膏、膨胀剂均为工业纯。将上述材料按配方称重,放入搅拌机充分搅拌,即为成品。本发明的导电混凝土达到下列技术指标:潮湿状态电阻率ρ≤5Ω.m,干燥状态下电阻率ρ≤6Ω.m;冲击电流耐受ΔR%≤20%,工频电流耐受ΔR%≤20%,;纯降阻剂对金属接地体平均腐蚀率≤0.03mm/年,埋地时对金属接地体平均腐蚀率≤0.05mm/年;PH值7-12范围内。
本发明将离子导电转换成电子导电,从而消除了两种不同导电原理的电荷交换界面,防止了钢材接地体的腐蚀。由于添加了与水硬性胶凝材料相配比的膨胀剂,使导电混凝土在水化过程中产生一定的体积膨胀和自应力,减少了导电混凝土的收缩裂缝,提高了导电混凝土的抗渗性和粘聚性,使其与接地体表面紧密接合,从而消除了接地体与土壤间的接触电阻。
由于电子导电链的稳定性增大,其干燥状态的电阻率小于6Ω.m,因此特别适合在干旱地区、缺水地区和岩石地区的接地工程中使用。
本发明导电混凝土初凝前仍保持了普通混凝土的和易性,其流动性、粘聚性和初凝时间都能满足普通水泥灌浆的工艺要求,完全可以用在岩层裂隙复盍层、砂砾层等地区的深孔压力灌注接地和深孔爆破接地。
本发明的产品使用时应先倒入搅拌机内搅拌均匀,再按每25公斤本发明产品加清水10-15公斤的比例加入清水,继续搅拌成流动性的凝胶体,然后在10-15分钟内注入孔、沟周围,初凝后随即填土壤夯实,防止爆晒,以免影响寿命。浇注前如接地孔、沟比较干燥,宜适当喷水保持潮湿。浇注孔深超过3米时,宜用灌浆机进行灌注,以保证导电混凝土质量。
本发明导电混凝土不仅可用作多种接地导电材料,而且可用作抗静电建筑材料,电磁屏蔽建筑材料,开关合闸电阻材料,电热器发热材料等。
具体实施方式
实施例:称取普通硅酸盐水泥55公斤,高纯石墨25公斤,工业用膨胀剂10公斤,熟石膏10公斤,倒入搅拌机搅拌均匀,装袋,即为成品。经检测有关技术指标如下:潮湿状态电阻率ρ=1.29Ω.m,干燥状态下电阻率ρ=1.39Ω.m,冲击电流
耐受ΔR%=1.5%,工频电流耐受ΔR%=0.8%;埋地时对金属接地体的腐蚀率(mm/年):圆钢0.0386,扁钢0.0390,镀锌圆钢0.0166,镀锌扁钢0.0162,纯降阻剂对金属接地体腐蚀率(mm/年)圆钢0.0167,扁钢0.0083,镀锌圆钢0.0055,镀锌扁钢0.058;PH=9.82。

Claims (3)

1.一种接地导电混凝土,其特征在于由下列组分和重量百分比组成:水泥45-70,石墨15-35,膨胀剂8-10,熟石膏7-10。
2.根据权利要求1所述的接地导电混凝土,其特征在于组分的重量百分比为:水泥55-65,石墨20-25,膨胀剂8-10,熟石膏7-10。
3.根据权利要求1所述的接地导电混凝土,其特征在于组分的重量百分比为:水泥55,石墨25,膨胀剂10,熟石膏10。
CN 02139619 2002-09-17 2002-09-17 接地导电混凝土 Expired - Lifetime CN1194930C (zh)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1298663C (zh) * 2005-04-18 2007-02-07 蔡庆宗 一种掺石墨的导电混凝土的制备方法
CN101969153A (zh) * 2010-10-09 2011-02-09 什邡名仕电子有限公司 低电阻非金属接地材料
CN102074807A (zh) * 2010-12-20 2011-05-25 西安优耐达电力技术有限公司 复合接地单元
CN102997322A (zh) * 2012-10-31 2013-03-27 赵宏祥 一种低压直流电发热板及其制作工艺
CN103224373A (zh) * 2013-03-21 2013-07-31 叶长青 防静电装饰板
CN109206078A (zh) * 2017-07-05 2019-01-15 北京华电新能咨询有限公司 一种具有降低接地电阻功能的灌浆料
CN113189146A (zh) * 2021-04-16 2021-07-30 国网甘肃省电力公司经济技术研究院 一种导电混凝土接地网监测大地裂隙滑坡的装置及方法
CN114315297A (zh) * 2021-12-28 2022-04-12 嘉华特种水泥股份有限公司 一种导电发热混凝土的水泥基材料及其制备方法

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1298663C (zh) * 2005-04-18 2007-02-07 蔡庆宗 一种掺石墨的导电混凝土的制备方法
CN101969153A (zh) * 2010-10-09 2011-02-09 什邡名仕电子有限公司 低电阻非金属接地材料
CN102074807A (zh) * 2010-12-20 2011-05-25 西安优耐达电力技术有限公司 复合接地单元
CN102074807B (zh) * 2010-12-20 2013-07-17 西安优耐达电力技术有限公司 复合接地单元
CN102997322A (zh) * 2012-10-31 2013-03-27 赵宏祥 一种低压直流电发热板及其制作工艺
CN102997322B (zh) * 2012-10-31 2015-04-22 赵宏祥 一种低压直流电发热板及其制作工艺
CN103224373A (zh) * 2013-03-21 2013-07-31 叶长青 防静电装饰板
CN103224373B (zh) * 2013-03-21 2014-10-22 叶长青 防静电装饰板
CN109206078A (zh) * 2017-07-05 2019-01-15 北京华电新能咨询有限公司 一种具有降低接地电阻功能的灌浆料
CN113189146A (zh) * 2021-04-16 2021-07-30 国网甘肃省电力公司经济技术研究院 一种导电混凝土接地网监测大地裂隙滑坡的装置及方法
CN113189146B (zh) * 2021-04-16 2024-05-28 国网甘肃省电力公司经济技术研究院 一种导电混凝土接地网监测大地裂隙滑坡的装置及方法
CN114315297A (zh) * 2021-12-28 2022-04-12 嘉华特种水泥股份有限公司 一种导电发热混凝土的水泥基材料及其制备方法

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Address after: 410014 No. 17, camphor Road, Changsha, Hunan

Patentee after: Standard new technology company of Zhongnan survey, design and Research Institute of state power Co.

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