固化粉煤灰抗压强度试验及固化机理研究
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摘要
随着经济全球化的快速发展,各国不同程度地出现了资源短缺、环境污染日益严重的问题,如何将资源合理地重复利用成为了人类需要共同面对的难题之一。而中国作为一个发展中国家,作为一个能源消耗的大国,就更加有必要对资源再利用进行深入地研究和探讨,坚持走可持续发展之路。进入21世纪以来,随着社会经济的不断发展,对电力的需求不断增加,燃烧煤炭量不断增加,从而导致了粉煤灰这种资源的快速增长。然而,当前粉煤灰的利用和处理还存在着许多问题,例如,湿排粉煤灰的利用、粉煤灰的露天堆放等等。因此,我们应该如何对粉煤灰资源进行合理地利用,如何研发出高效、轻质的固化粉煤灰复合材料,使得粉煤灰的回收利用走上合理化、商品化的道路,是当前我国面临最为紧迫的问题,也是未来粉煤灰的可持续发展方向。
本文将具有优越性能的固化剂作为外掺剂应用于粉煤灰的固化研究之中,采用了理论分析与试验实测相结合的办法对其进行研究。通过室内无侧限抗压强度试验,探讨了固化剂掺入比和龄期对固化粉煤灰强度的影响规律；通过固化粉煤灰X射线衍射(XRD)试验,研究了固化粉煤灰各组分在强度形成过程中的变化规律；通过扫描电镜(SEM)测试,分析了固化粉煤灰的微结构特点及微结构形成过程；试验结果表明：(1)固化剂掺入得越多,固化粉煤灰的抗压强度也相应地增加；(2)固化粉煤灰的龄期越长,其抗压强度也越大；(3)固化粉煤灰中的固化剂掺量越高,固结材料的水化反应速度越快；(4)水化产物的种类与固化剂的掺量关系不大,固化剂的掺量对水化产物的生成量有影响。
本文将在分析粉煤灰-石灰体系反应基本原理的基础上,通过试验研究提出了固化粉煤灰的固化机理,通过理论分析以及试验研究,我们可以看出这种JNS固化粉煤灰是一种经济高效的材料,无论从技术上还是经济上都是可行的,造价低廉、施工适用性较强,它充分体现了废物治理、资源再利用的社会效益、经济效益和环境效益的统一。该项研究必将为固化粉煤灰在工程中的进一步应用奠定理论和试验基础,具有重大的社会现实意义。
With the rapid development of economic globalization, countries appeared to varying degrees, lack of resources, the growing problem of environmental pollution, how to reuse the resources to become a rational human beings need to face a difficult problem. And China as a developing country, as a large energy consumption country, the more it is necessary to reuse resources for indepth study and exploration, and adhere to sustainable development. In the 21st century, with the continuous development of social economy, increasing demand for electricity, increasing the amount of burning coal, which led to the rapid growth of fly ash such resources. However, the current use and disposal of fly ash, there were still many problems, such as the use of wet fly ash and fly ash in open dumps and so on. Therefore, how do we fly ash rational use of resources, how to develop efficient, lightweight composite material solidified fly ash, making the recycling of fly ash onto the rationalization, commercialization of the road, is currently facing our country The most pressing issue, but also the future direction of the sustainable development of fly ash.
The solidified agent on with particular characteristics was used as a new kind of additive for solidifying fly ash. With the theoretical analysis and experimental measurement method of combining study it. Unconfined compression strength tests were carried out to analyze the effects of solidified agent content and curing period. The variation law of the various components of the solidified fly ash during the formation of strength was discussed on the basis of X-ray Diffraction (XRD) test s of solidified fly ash; scanning electron microscope (SEM) was used to analyze the microstructure formation process and microstructure characteristics of the solidified fly ash; The results showed that:(1) Curing agent mixed with the more compressive strength of solidified fly ash is also a corresponding increase; (2) Curing the longer the age of fly ash, the compressive strength greater; (3) Solidified fly ash content in the curing agent the higher the hydration of cementations materials faster; (4) The type of hydration products and have little content of curing agent, curing agent content on the amount of influence the formation of hydration products.
In this paper, Results of analysis on the basic principle of reactions between the fly ash and lime were the basis of the proposed solidified fly ash reinforcement mechanism, Through theoretical analysis and experimental research, we can see that JNS solidified fly ash is a cost effective material, both are technically and economically feasible, low cost, the applicability of strong construction, which fully reflects the waste management, resource re-use social, economic and environmental benefits of unity which provides theoretical and practical foundation for further application of solidified fly ash.
本文将具有优越性能的固化剂作为外掺剂应用于粉煤灰的固化研究之中,采用了理论分析与试验实测相结合的办法对其进行研究。通过室内无侧限抗压强度试验,探讨了固化剂掺入比和龄期对固化粉煤灰强度的影响规律；通过固化粉煤灰X射线衍射(XRD)试验,研究了固化粉煤灰各组分在强度形成过程中的变化规律；通过扫描电镜(SEM)测试,分析了固化粉煤灰的微结构特点及微结构形成过程；试验结果表明：(1)固化剂掺入得越多,固化粉煤灰的抗压强度也相应地增加；(2)固化粉煤灰的龄期越长,其抗压强度也越大；(3)固化粉煤灰中的固化剂掺量越高,固结材料的水化反应速度越快；(4)水化产物的种类与固化剂的掺量关系不大,固化剂的掺量对水化产物的生成量有影响。
本文将在分析粉煤灰-石灰体系反应基本原理的基础上,通过试验研究提出了固化粉煤灰的固化机理,通过理论分析以及试验研究,我们可以看出这种JNS固化粉煤灰是一种经济高效的材料,无论从技术上还是经济上都是可行的,造价低廉、施工适用性较强,它充分体现了废物治理、资源再利用的社会效益、经济效益和环境效益的统一。该项研究必将为固化粉煤灰在工程中的进一步应用奠定理论和试验基础,具有重大的社会现实意义。
With the rapid development of economic globalization, countries appeared to varying degrees, lack of resources, the growing problem of environmental pollution, how to reuse the resources to become a rational human beings need to face a difficult problem. And China as a developing country, as a large energy consumption country, the more it is necessary to reuse resources for indepth study and exploration, and adhere to sustainable development. In the 21st century, with the continuous development of social economy, increasing demand for electricity, increasing the amount of burning coal, which led to the rapid growth of fly ash such resources. However, the current use and disposal of fly ash, there were still many problems, such as the use of wet fly ash and fly ash in open dumps and so on. Therefore, how do we fly ash rational use of resources, how to develop efficient, lightweight composite material solidified fly ash, making the recycling of fly ash onto the rationalization, commercialization of the road, is currently facing our country The most pressing issue, but also the future direction of the sustainable development of fly ash.
The solidified agent on with particular characteristics was used as a new kind of additive for solidifying fly ash. With the theoretical analysis and experimental measurement method of combining study it. Unconfined compression strength tests were carried out to analyze the effects of solidified agent content and curing period. The variation law of the various components of the solidified fly ash during the formation of strength was discussed on the basis of X-ray Diffraction (XRD) test s of solidified fly ash; scanning electron microscope (SEM) was used to analyze the microstructure formation process and microstructure characteristics of the solidified fly ash; The results showed that:(1) Curing agent mixed with the more compressive strength of solidified fly ash is also a corresponding increase; (2) Curing the longer the age of fly ash, the compressive strength greater; (3) Solidified fly ash content in the curing agent the higher the hydration of cementations materials faster; (4) The type of hydration products and have little content of curing agent, curing agent content on the amount of influence the formation of hydration products.
In this paper, Results of analysis on the basic principle of reactions between the fly ash and lime were the basis of the proposed solidified fly ash reinforcement mechanism, Through theoretical analysis and experimental research, we can see that JNS solidified fly ash is a cost effective material, both are technically and economically feasible, low cost, the applicability of strong construction, which fully reflects the waste management, resource re-use social, economic and environmental benefits of unity which provides theoretical and practical foundation for further application of solidified fly ash.
引文
[1]中国环境年鉴[M].北京：中国环境科学出版社,2005.
[2]梁晓平,苏成德.粉煤灰综合利用现状及发展趋势[J].河北理工学院学报,2005,27(3)：]48-150.
[3]鲁晓勇,朱小燕.粉煤灰综合利用的现状与前景展望[J].辽宁工程技术大学学报,2005,24(2)：295-298.
[4]郭鸿,骆亚生,杨永俊.掺黄土粉煤灰的渗透特性[J].西北农林科技大学学报(自然科学版),2009,37(9)：219-223.
[5]林彤,刘祖德.粉煤灰与生石灰加固软土的室内试验研究[J].岩土力学,2006,24(6)：1049-1052.
[6]Swanepoel. J.C. Utilization of fly ash in a geopolymeric material [J]. Applied Geochemistry,2002, 17(8):1143-1148.
[7]Erdal Cokca, Zeka Yilmaz. Use of rubber and bentonite added fly ash as a liner material [J]. Waste Management 2004(24),153-164.
[8]Manoj Kumar Mishra and U.M.Rao Karanam. Geotechnical characterization of fly ash composites for backfilling mine voids [J]. Geotechnical and Geological Engineering,2006,24(6):1749-1765.
[9]Ambarish Ghosh and Chillara Subbar. Strength characteristics of class F fly ash modified with lime and gypsum [J]. Journal of Geotechnical and Geoenvironmental Engineering,2007,133(7):757-766.
[10]施惠生,赵玉静,黎韬.粉煤灰和化工废石膏复合用作筑路材料研究[J].粉煤灰综合利用,2001,(4),27-30.
[11]孙家瑛、郑京彪、周震雷.钛石膏-粉煤灰复合制备路基回填材料试验研究[J].公路,2001,(6),107-110.
[12]]胥书霞,邵生俊.贮灰场固化粉煤灰防渗材料试验研究[J].岩石力学与工程学报,2005,24(18)：3229-3235.
[13]王显茂.粉煤灰资源化途径及效益分析[J].粉煤灰综合利用,2006(3)：52-53.
[14]蔡卫.几种粉煤灰综合利用途径的效益分析[J].粉煤灰综合利用,2000(1)：64-65.
[15]]王立刚.粉煤灰的环境危害与利用[J].中国矿业,2001,10(4)：27-28.
[16]周维博等.我国渠道渗技术究与进展[J].水利水电技进展,2004,10.
[17]衣平,娄国充.粉煤灰地基的处理及应用[J].粉煤灰综合利用,2002(3)：3-4.
[18]秦乃兵,高振宇,鲁凤艳.深层搅拌法在粉煤灰地基加固中的应用[J].施工技术,2001,30(9)：29-30.
[19]孙茂前,刘岩瑛.粉喷桩在粉煤灰地基处理中的试验研究[J].西部探矿工程,2002,75(2)：16-17.
[20]沈正,黄晓明.固化粉煤灰试验研究[J].公路交通科技,2007,24(1)：26-29.
[21]汪克进.湿排对粉煤灰性质影响的研究[D].重庆：重庆大学材料科学与工程学院,2005.
[22]马悦红.粉煤灰特性及综合利用[J].西北电力技术,2004,3.
[23]张广,贾廷耀,万山.粉煤灰分类及其在混凝土中的应用[J].国外建材科技,2007,28(2)：24-26.
[24]胡明玉.粉煤灰混凝土小型空心砌块研究[J].新型墙体材料与施工,]998(12)：14-16.
[25]黎诚.粉煤灰生产混凝土空心砌块[J].昆明理工大学学报,2001,26(5)：63-66.
[26]余峰,夏燕.超细粉煤灰高强混凝土的综合性能研究[J].武汉理工大学学报,2008,30(5)：32-34.
[27]李红辉.大掺量粉煤灰高性能混凝土研究[D].北京：北京建筑工程学院,结构工程专业,2007.
[28]姜桂芳,朱红.在城市道路工程中粉煤灰的应用[J].黑龙江交通科技,2002(8)：25.
[29]张朝阳,沈立彬.粉煤灰混凝土在道路中的应用[J].安徽建筑,2004(6)：31-32.
[30]赵全胜.大掺量粉煤灰混凝土在工程中的应用研究[D].河北工业大学,结构工程专业,2002.
[31]中国环境年鉴[M].北京：中国环境科学出版社,2005.
[32]宣怀平,董金道我国粉煤灰综合利用现状及若干实用技术的介绍[J].粉煤灰,2005,(3)：29-32.
[33]钱易,唐孝炎.环境保护与可持续发展[M].北京：高等教育出版社,2005.
[34]孙明湖,咸惠军.海水冲排粉煤灰的性质和利用研究[J].粉煤灰综合利用,2003(4)：30-32.
[35]张海林.深层搅拌法设计理论及其在软土地基处理中的应用[D].天津：天津大学建筑工程学院,2004.
[36]龚晓南.地基处理技术发展与展望[M].北京：中国水利水电出版社,2004：3-5.
[37]王起刚.强夯法在粉煤灰地基中的应用研究[D].青岛：中国海洋大学,环境科学与工程学院,2003.
[38]台佳佳,何昌荣,张胜利,刘黎.水泥土室内试验研究[J].水电站设计,2005,21(2)：72-74.
[39]于敦喜,徐明厚,易帆等.燃煤过程中颗粒物的形成机理研究进展[J].煤炭转化,2004,27(4)：7-12.
[40]孙俊民,韩德馨.粉煤灰的形成和特性及其应用前景[J].煤炭转化,1999,22(1)：10-14.
[41]孙亦禄.煤中矿物杂质对锅炉的危害[M].北京：水利电力工业出版社,1994：81-82.
[42]钱觉时.粉煤灰特性与粉煤灰混凝土[M].北京：科学出版社,2002.
[43]马彦涛等.用HAS固化剂固化粉煤灰作路基材料的研究及应用[J].粉煤灰综合利用,2005,3.
[44]中华人民共和国国家质量监督检验检疫总局.GB/T 1596-2005,用于水泥和混凝土中的粉煤灰[M].北京：中国标准出版社,2005.
[45]饶玲丽.粉煤灰理化性质分析及粉煤灰透水砖的制备研究[D].贵阳：贵州大学,2006.
[46]李雷,姜振泉粉煤灰的理化特征及其综合利用[J].环境科学研究,1998,11(3)：60-62.
[47]王学武,赵风清,杜炳华等.粉煤灰综合利用研究述评[J].粉煤灰综合利用,2001(6)：39-40.
[48]董保澎.固体废物的处理与利用[M].北京：冶金工业出版社,1998.
[49]刘振杰,余建星,景悦.淤泥粉煤灰混合土的工程性质与混合吹填试验研究[J].中国港湾建设,2001,10(5)：38-41.
[50]钱觉时,王智,吴传明.粉煤灰的矿物组成(中)[J].粉煤灰综合利用,2001,(2)：37-41.
[51]周传景,袁春材,宋英杰.粉煤灰的矿物相特征及其对综合利用的影响[J].粉煤灰,1998,(5)：27-30.
[52]盛虞.粉煤灰及掺合料的击实特性[J].岩土工程学报,2008,10.
[53]刘松玉,钱国超,章定文.粉喷桩复合地基理论与工程应用[M].北京：中国建筑工业出版社,2006.
[54]王军,李悦.矿渣水泥混凝十抗海水佼蚀性能试验研究[J].腐蚀与护,2006,27(8)：397-399.
[55]赛汉胡尔,姚婕.粉煤灰的处理与综合利用[J].内蒙古环境保护,2004,16(4)：21-23.
[56]古德生,胡家国.粉煤灰应用研究现状采[J].矿技术,2002,2(2)：1-4.
[57]张浩,许荣华.粉煤灰资源化利用现状及其展望[J].山西能源与节能,2008(2)：21-23.
[58]王鹏飞.粉煤灰综合利用研究进展[J].电力环境保护,2006,22(2)：42-44.
[59]李时亮,周全能.粉煤灰作为路堤填料的动力特性试验研究[J].岩土力学,2005,26(2)：311-314.
[60]梁慧.粉煤灰活性效应研究[D].南京：中南大学,2007.
[2]梁晓平,苏成德.粉煤灰综合利用现状及发展趋势[J].河北理工学院学报,2005,27(3)：]48-150.
[3]鲁晓勇,朱小燕.粉煤灰综合利用的现状与前景展望[J].辽宁工程技术大学学报,2005,24(2)：295-298.
[4]郭鸿,骆亚生,杨永俊.掺黄土粉煤灰的渗透特性[J].西北农林科技大学学报(自然科学版),2009,37(9)：219-223.
[5]林彤,刘祖德.粉煤灰与生石灰加固软土的室内试验研究[J].岩土力学,2006,24(6)：1049-1052.
[6]Swanepoel. J.C. Utilization of fly ash in a geopolymeric material [J]. Applied Geochemistry,2002, 17(8):1143-1148.
[7]Erdal Cokca, Zeka Yilmaz. Use of rubber and bentonite added fly ash as a liner material [J]. Waste Management 2004(24),153-164.
[8]Manoj Kumar Mishra and U.M.Rao Karanam. Geotechnical characterization of fly ash composites for backfilling mine voids [J]. Geotechnical and Geological Engineering,2006,24(6):1749-1765.
[9]Ambarish Ghosh and Chillara Subbar. Strength characteristics of class F fly ash modified with lime and gypsum [J]. Journal of Geotechnical and Geoenvironmental Engineering,2007,133(7):757-766.
[10]施惠生,赵玉静,黎韬.粉煤灰和化工废石膏复合用作筑路材料研究[J].粉煤灰综合利用,2001,(4),27-30.
[11]孙家瑛、郑京彪、周震雷.钛石膏-粉煤灰复合制备路基回填材料试验研究[J].公路,2001,(6),107-110.
[12]]胥书霞,邵生俊.贮灰场固化粉煤灰防渗材料试验研究[J].岩石力学与工程学报,2005,24(18)：3229-3235.
[13]王显茂.粉煤灰资源化途径及效益分析[J].粉煤灰综合利用,2006(3)：52-53.
[14]蔡卫.几种粉煤灰综合利用途径的效益分析[J].粉煤灰综合利用,2000(1)：64-65.
[15]]王立刚.粉煤灰的环境危害与利用[J].中国矿业,2001,10(4)：27-28.
[16]周维博等.我国渠道渗技术究与进展[J].水利水电技进展,2004,10.
[17]衣平,娄国充.粉煤灰地基的处理及应用[J].粉煤灰综合利用,2002(3)：3-4.
[18]秦乃兵,高振宇,鲁凤艳.深层搅拌法在粉煤灰地基加固中的应用[J].施工技术,2001,30(9)：29-30.
[19]孙茂前,刘岩瑛.粉喷桩在粉煤灰地基处理中的试验研究[J].西部探矿工程,2002,75(2)：16-17.
[20]沈正,黄晓明.固化粉煤灰试验研究[J].公路交通科技,2007,24(1)：26-29.
[21]汪克进.湿排对粉煤灰性质影响的研究[D].重庆：重庆大学材料科学与工程学院,2005.
[22]马悦红.粉煤灰特性及综合利用[J].西北电力技术,2004,3.
[23]张广,贾廷耀,万山.粉煤灰分类及其在混凝土中的应用[J].国外建材科技,2007,28(2)：24-26.
[24]胡明玉.粉煤灰混凝土小型空心砌块研究[J].新型墙体材料与施工,]998(12)：14-16.
[25]黎诚.粉煤灰生产混凝土空心砌块[J].昆明理工大学学报,2001,26(5)：63-66.
[26]余峰,夏燕.超细粉煤灰高强混凝土的综合性能研究[J].武汉理工大学学报,2008,30(5)：32-34.
[27]李红辉.大掺量粉煤灰高性能混凝土研究[D].北京：北京建筑工程学院,结构工程专业,2007.
[28]姜桂芳,朱红.在城市道路工程中粉煤灰的应用[J].黑龙江交通科技,2002(8)：25.
[29]张朝阳,沈立彬.粉煤灰混凝土在道路中的应用[J].安徽建筑,2004(6)：31-32.
[30]赵全胜.大掺量粉煤灰混凝土在工程中的应用研究[D].河北工业大学,结构工程专业,2002.
[31]中国环境年鉴[M].北京：中国环境科学出版社,2005.
[32]宣怀平,董金道我国粉煤灰综合利用现状及若干实用技术的介绍[J].粉煤灰,2005,(3)：29-32.
[33]钱易,唐孝炎.环境保护与可持续发展[M].北京：高等教育出版社,2005.
[34]孙明湖,咸惠军.海水冲排粉煤灰的性质和利用研究[J].粉煤灰综合利用,2003(4)：30-32.
[35]张海林.深层搅拌法设计理论及其在软土地基处理中的应用[D].天津：天津大学建筑工程学院,2004.
[36]龚晓南.地基处理技术发展与展望[M].北京：中国水利水电出版社,2004：3-5.
[37]王起刚.强夯法在粉煤灰地基中的应用研究[D].青岛：中国海洋大学,环境科学与工程学院,2003.
[38]台佳佳,何昌荣,张胜利,刘黎.水泥土室内试验研究[J].水电站设计,2005,21(2)：72-74.
[39]于敦喜,徐明厚,易帆等.燃煤过程中颗粒物的形成机理研究进展[J].煤炭转化,2004,27(4)：7-12.
[40]孙俊民,韩德馨.粉煤灰的形成和特性及其应用前景[J].煤炭转化,1999,22(1)：10-14.
[41]孙亦禄.煤中矿物杂质对锅炉的危害[M].北京：水利电力工业出版社,1994：81-82.
[42]钱觉时.粉煤灰特性与粉煤灰混凝土[M].北京：科学出版社,2002.
[43]马彦涛等.用HAS固化剂固化粉煤灰作路基材料的研究及应用[J].粉煤灰综合利用,2005,3.
[44]中华人民共和国国家质量监督检验检疫总局.GB/T 1596-2005,用于水泥和混凝土中的粉煤灰[M].北京：中国标准出版社,2005.
[45]饶玲丽.粉煤灰理化性质分析及粉煤灰透水砖的制备研究[D].贵阳：贵州大学,2006.
[46]李雷,姜振泉粉煤灰的理化特征及其综合利用[J].环境科学研究,1998,11(3)：60-62.
[47]王学武,赵风清,杜炳华等.粉煤灰综合利用研究述评[J].粉煤灰综合利用,2001(6)：39-40.
[48]董保澎.固体废物的处理与利用[M].北京：冶金工业出版社,1998.
[49]刘振杰,余建星,景悦.淤泥粉煤灰混合土的工程性质与混合吹填试验研究[J].中国港湾建设,2001,10(5)：38-41.
[50]钱觉时,王智,吴传明.粉煤灰的矿物组成(中)[J].粉煤灰综合利用,2001,(2)：37-41.
[51]周传景,袁春材,宋英杰.粉煤灰的矿物相特征及其对综合利用的影响[J].粉煤灰,1998,(5)：27-30.
[52]盛虞.粉煤灰及掺合料的击实特性[J].岩土工程学报,2008,10.
[53]刘松玉,钱国超,章定文.粉喷桩复合地基理论与工程应用[M].北京：中国建筑工业出版社,2006.
[54]王军,李悦.矿渣水泥混凝十抗海水佼蚀性能试验研究[J].腐蚀与护,2006,27(8)：397-399.
[55]赛汉胡尔,姚婕.粉煤灰的处理与综合利用[J].内蒙古环境保护,2004,16(4)：21-23.
[56]古德生,胡家国.粉煤灰应用研究现状采[J].矿技术,2002,2(2)：1-4.
[57]张浩,许荣华.粉煤灰资源化利用现状及其展望[J].山西能源与节能,2008(2)：21-23.
[58]王鹏飞.粉煤灰综合利用研究进展[J].电力环境保护,2006,22(2)：42-44.
[59]李时亮,周全能.粉煤灰作为路堤填料的动力特性试验研究[J].岩土力学,2005,26(2)：311-314.
[60]梁慧.粉煤灰活性效应研究[D].南京：中南大学,2007.