碱激发高炉矿渣-粉煤灰制备充填胶凝材料
|
摘要
以河南某材料公司的高炉矿渣和粉煤灰为原料,NaOH溶液为碱激发剂,对山东某金属矿山的尾砂进行胶结充填体强度试验。结果表明,在高炉矿渣与粉煤灰的质量比为4,NaOH浓度为8 mol/L,液固质量比为0.5情况下,充填材料试件3 d、28 d的抗压强度分别为2.12和6.84 MPa,满足充填要求。SEM分析表明,高炉矿渣和粉煤灰在碱激发后生成大量的凝胶相,是充填材料试件产生强度的主要原因;XRD和FTIR分析表明,碱激发材料中出现了水化硅酸钙的晶相峰,Si(Al)—O—Si在碱激发作用下发生解聚后又重新聚合形成[SiO_4],以及碱激发后的材料体系吸收空气中的CO_2生成碳酸盐矿物,是净浆试件强度的主要来源。
Using blast furnace slag and fly ash from a material company in Henan as raw materials,Na OH solution as alkali activator,the strength test of cement filling body for the metal mine tailings in Shandong is conducted. The results showed that when blast furnace slag / fly ash mass ratio was 4,Na OH concentration was 8 mol / L and liquid / solid mass ratio was 0. 5,the 3 d and 28 d compressive strength of cement filling material was 2. 12 and 6. 84 MPa respectively,which meets the requirements of backfilling. SEM analysis shows that a large number of gel phase is generated after alkali activation,which is the main reason for improving strength of the filling materials. XRD and FTIR analysis showed that the crystal phase peaks of hydrated calcium silicate appeared in the Alkali activated material. [Si O4]is reconstituted after the depolymerization of Si( Al) —O—Si under the activation of alkali solution and furthermore,carbonate minerals were formed in Alkali activated material through the adsorption of CO2 from atmosphere. All these were the sources of strength of the test specimens.
Using blast furnace slag and fly ash from a material company in Henan as raw materials,Na OH solution as alkali activator,the strength test of cement filling body for the metal mine tailings in Shandong is conducted. The results showed that when blast furnace slag / fly ash mass ratio was 4,Na OH concentration was 8 mol / L and liquid / solid mass ratio was 0. 5,the 3 d and 28 d compressive strength of cement filling material was 2. 12 and 6. 84 MPa respectively,which meets the requirements of backfilling. SEM analysis shows that a large number of gel phase is generated after alkali activation,which is the main reason for improving strength of the filling materials. XRD and FTIR analysis showed that the crystal phase peaks of hydrated calcium silicate appeared in the Alkali activated material. [Si O4]is reconstituted after the depolymerization of Si( Al) —O—Si under the activation of alkali solution and furthermore,carbonate minerals were formed in Alkali activated material through the adsorption of CO2 from atmosphere. All these were the sources of strength of the test specimens.
引文
[1]王青,任凤玉,顾晓薇,等.采矿学[M].北京:冶金工业出版社,2001.Wang Qing,Ren Fengyu,Gu Xiaowei,et al.Mining[M].Beijing:Metallurgical Industry Press,2001.
[2]石建新.浆体膨胀充填材料性能研究与应用[M].徐州:中国矿业大学出版社,2013.Shi Jianxin.Performance Study and Application of Paste Expansion Filling Materials[M].Xuzhou:China Mining University Press,2013.
[3]聂轶苗,刘颖.粉煤灰在矿物聚合材料中的应用[M].北京:化学工业出版社,2015.Nie Yimiao,Liu Ying.The Application of Fly Ash to Geopolymer[M].Beijing:Chemical Industry Press,2015.
[4]Provis J L,Palomo A,Shi C.Advances in understanding alkali-activated materials[J].Cement&Concrete Research,2015,78:110-125.
[5]Davidovits J.Geopolymers-inorganic polymeric new materials[J].Therm Anal Calorim,2008(8):1633-1656.
[6]马鸿文,杨静,任玉峰,等.矿物聚合材料:研究现状与发展前景[J].地学前缘,2002(4):398-407.Ma Hongwen,Yang Jing,Ren Yufeng,et al.Mineral polymer:current developments and prospects[J].Earth Science Frontiers,2002(4):398-407.
[7]Zhang Z H,Zhu H J,Zhou C H,et al.Geopolymer from kaolin in China:An overview[J].Applied Clay Science,2016,119:31-41.
[8]Benito P,Leonelli C,Medri V,et al.Geopolymers:a new and smart way for a sustainable development[J].Applied Clay Science,2013,73:1-3.
[9]Barrie E,Cappuyns V,Vassilieva E,et al.Potential of inorganic polymers(geopolymers)made of halloysite and volcanic glass for the immobilisation of tailings from gold extraction in Ecuador[J].Applied Clay Science,2015,109:95-106.
[10]张光存,杨志强,高谦,等.利用磷石膏开发替代水泥的早强充填胶凝材料[J].金属矿山,2015(3):194-198.Zhang Guangcun,Yang Zhiqiang,Gao Qian,et al.Development of early strength filling cementing material by using phosphogypsum as substitute of traditional cement[J].Metal Mine,2015(3):194-198.
[11]BobiricC,Shim J,Pyeon J,et al.Influence of waste glass on the microstructure and strength of inorganic polymers[J].Ceramics International,2015(10):13638-13649.
[12]Aredes F G M,Campos T M B,Machado J P B,et al.Effect of cure temperature on the formation of metakaolinite-based geopolymer[J].Ceramics International,2015(6):7302-7311.
[13]Jiao X,Zhang Y,Chen T.Thermal stability of a silica-rich vanadium tailing based geopolymer[J].Construction&Building Materials,2013,38(38):43-47.
[14]Nematollahi B,Sanjayan J.Effect of different superplasticizers and activator combinations on workability and strength of fly ash based geopolymer[J].Materials&Design,2014(5):667-672.
[2]石建新.浆体膨胀充填材料性能研究与应用[M].徐州:中国矿业大学出版社,2013.Shi Jianxin.Performance Study and Application of Paste Expansion Filling Materials[M].Xuzhou:China Mining University Press,2013.
[3]聂轶苗,刘颖.粉煤灰在矿物聚合材料中的应用[M].北京:化学工业出版社,2015.Nie Yimiao,Liu Ying.The Application of Fly Ash to Geopolymer[M].Beijing:Chemical Industry Press,2015.
[4]Provis J L,Palomo A,Shi C.Advances in understanding alkali-activated materials[J].Cement&Concrete Research,2015,78:110-125.
[5]Davidovits J.Geopolymers-inorganic polymeric new materials[J].Therm Anal Calorim,2008(8):1633-1656.
[6]马鸿文,杨静,任玉峰,等.矿物聚合材料:研究现状与发展前景[J].地学前缘,2002(4):398-407.Ma Hongwen,Yang Jing,Ren Yufeng,et al.Mineral polymer:current developments and prospects[J].Earth Science Frontiers,2002(4):398-407.
[7]Zhang Z H,Zhu H J,Zhou C H,et al.Geopolymer from kaolin in China:An overview[J].Applied Clay Science,2016,119:31-41.
[8]Benito P,Leonelli C,Medri V,et al.Geopolymers:a new and smart way for a sustainable development[J].Applied Clay Science,2013,73:1-3.
[9]Barrie E,Cappuyns V,Vassilieva E,et al.Potential of inorganic polymers(geopolymers)made of halloysite and volcanic glass for the immobilisation of tailings from gold extraction in Ecuador[J].Applied Clay Science,2015,109:95-106.
[10]张光存,杨志强,高谦,等.利用磷石膏开发替代水泥的早强充填胶凝材料[J].金属矿山,2015(3):194-198.Zhang Guangcun,Yang Zhiqiang,Gao Qian,et al.Development of early strength filling cementing material by using phosphogypsum as substitute of traditional cement[J].Metal Mine,2015(3):194-198.
[11]BobiricC,Shim J,Pyeon J,et al.Influence of waste glass on the microstructure and strength of inorganic polymers[J].Ceramics International,2015(10):13638-13649.
[12]Aredes F G M,Campos T M B,Machado J P B,et al.Effect of cure temperature on the formation of metakaolinite-based geopolymer[J].Ceramics International,2015(6):7302-7311.
[13]Jiao X,Zhang Y,Chen T.Thermal stability of a silica-rich vanadium tailing based geopolymer[J].Construction&Building Materials,2013,38(38):43-47.
[14]Nematollahi B,Sanjayan J.Effect of different superplasticizers and activator combinations on workability and strength of fly ash based geopolymer[J].Materials&Design,2014(5):667-672.