地质聚合物是由硅铝酸盐材料通过碱激发形成，具有网络结构和无定形性质的胶凝材料。由于地质聚合物具有优于普通硅酸盐水泥的力学性能，并且制备过程中CO2排放量较少等优点，被认为是硅酸盐水泥的良好替代品。尽管相当部分的研究者认为地聚物的耐久性也要好于普通硅酸盐水泥，但其他研究者对此持怀疑态度并认为很多方面还需进一步的研究。本文回顾了近几年有关地聚物耐久性研究的现状和进展，总结和讨论了地聚物的吸水性、碳化、硫酸盐侵蚀、酸腐蚀、碱-集料反应和氯离子渗透等耐久性能及其作用机理的研究成果，并提出了现有研究存在的主要问题。
Geopolymer is a kind of cementitious materials with network structures and amorphous phase , which can be synthesized by activating aluminosilicate through alkaline solution .Due to the mechanical properties of geopolymer are better than those of ordinary portland cement , and the CO 2 emissions in production process are less than the latter , the geopolymer is regarded as a promising substitute for ordinary portland cement .Many researchers believe that the durability of geopolymer for civil structural applications is better than that of OPC , however some other researchers remain sceptical of that and consider the durability of geopolymer needs further studies .Based on most of the available literatures , the present paper reviews the researches on durability of geopolymer in civil engineering application , including the gas permeability and water absorption , the carbonization , the sulfate corrosion , the acid corrosion, the alkali aggregate reaction , and the chloride ingress .In addition, the mechanisms of the material resisting the attacks were summarized , and the problems in the current researches were discussed .
参考文献
| [1] | Fernando Pacheco-Torgal;Joao Castro-Gomes;Said Jalali.Alkali-activated binders: A review Part 1. Historical background, terminology, reaction mechanisms and hydration products[J].Construction and Building Materials,20087(7):1305-1314. |
| [2] | Susan A. Bernal;Ruby Mejia de Gutierrez;Alba L Pedraza.Effect of binder content on the performance of alkali-activated slag concretes[J].Cement and Concrete Research,20111(1):1-8. |
| [3] | John L Provis;Rupert J. Myers;Claire E. White.X-ray microtomography shows pore structure and tortuosity in alkali-activated binders[J].Cement and Concrete Research,20126(6):855-864. |
| [4] | A. Morandeau;M. Thiery;P. Dangla.Investigation of the carbonatlon mechanism of CH and C-S-H in terms of kinetics, microstructure changes and moisture properties[J].Cement and Concrete Research,2014:153-170. |
| [5] | Susan A. Bernal;John L Provis;Brant Walkley.Gel nanostructure in alkali-activated binders based on slag and fly ash, and effects of accelerated carbonation[J].Cement and Concrete Research,2013:127-144. |
| [6] | Susan A. Bernal;Rackel San Nicolas;Rupert J. Myers.MgO content of slag controls phase evolution and structural changes induced by accelerated carbonation in alkali-activated binders[J].Cement and Concrete Research,2014:33-43. |
| [7] | M. Criado;A. Palomo;A. Fernandez-Jimenez.Alkali activation of fly ashes. Part 1: Effect of curing conditions on the carbonation of the reaction products[J].Fuel,200516(16):2048-2054. |
| [8] | Saud Al-Otaibi.Durability of concrete incorporating GGBS activated by water-glass[J].Construction and Building Materials,200810(10):2059-2067. |
| [9] | T. Bakharev;J.G. Sanjayan;Y.-B. Cheng.Resistance of alkali-activated slag concrete to carbonation[J].Cement and Concrete Research,20019(9):1277-1283. |
| [10] | Steel corrosion behaviour in carbonated alkali-activated slag concrete[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,20099(9):2027. |
| [11] | Puertas F;Palacios M;Vazquez T.Carbonation process of alkali-activated slag mortars[J].Journal of Materials Science,200610(10):3071-3082. |
| [12] | 胡英泽 .氧化物组成对无机矿物聚合物混凝土耐久性的影响[D].沈阳建筑大学,2011. |
| [13] | Susan A. Bernal;John L Provis;David G. Brice.Accelerated carbonation testing of alkali-activated binders significantly underestimates service life: The role of pore solution chemistry[J].Cement and Concrete Research,201210(10):1317-1326. |
| [14] | Bernal, Susan A.;Provis, John L.;Mejia de Gutierrez, Ruby;van Deventer, Jannie S. J..Accelerated carbonation testing of alkali-activated slag/metakaolin blended concretes: effect of exposure conditions[J].Materials and structures,20153(3):653-669. |
| [15] | Susan A. Bernal;Ruby Mejia de Gutierrez;John L Provis.Effect of silicate modulus and metakaolin incorporation on the carbonation of alkali silicate-activated slags[J].Cement and Concrete Research,20106(6):898-907. |
| [16] | Susan A. Bernal;Ruby Mejia de Gutierrez;John L Provis.Engineering and durability properties of concretes based on alkali-activated granulated blast furnace slag/metakaolin blends[J].Construction and Building Materials,2012:99-108. |
| [17] | A.M. Rashad;Y. Bai;P.A.M. Basheer.Hydration and properties of sodium sulfate activated slag[J].Cement & concrete composites,2013:20-29. |
| [18] | Fernandez-Jimenez A;Garcia-Lodeiro I;Palomo A.Durability of alkali-activated fly ash cementitious materials[J].Journal of Materials Science,20079(9):3055-3065. |
| [19] | Djwantoro Hardjito;Steenie E.Wallah;Dody M.J.Sumajouw;B.Vijaya Rangan.On the Development of Fly Ash-Based Geopolymer Concrete[J].ACI materials journal,20046(6):467-472. |
| [20] | T. Bakharev.Resistance of geopolymer materials to acid attack[J].Cement and Concrete Research,20054(4):658-670. |
| [21] | Idawati Ismail;Susan A. Bernal;John L. Provis;Sinin Hamdan;Jannie S. J. van Deventer.Microstructural changes in alkali activated fly ash/slag geopolymers with sulfate exposure[J].Materials and structures,20133(3):361-373. |
| [22] | 刘骅 .无机聚合物混凝土耐久性能试验研究[D].武汉理工大学,2011. |
| [23] | Redmond R. Lloyd;John L. Provis;Jannie S. J. van Deventer.Acid resistance of inorganic polymer binders. 1. Corrosion rate[J].Materials and structures,20121/2(1/2):1-14. |
| [24] | Robin E. Beddoe;Horst W. Dorner.Modelling acid attack on concrete: Part I. The essential mechanisms[J].Cement and Concrete Research,200512(12):2333-2339. |
| [25] | 贺亮 .碱激发矿渣粉煤灰水泥抗干湿循环及耐腐蚀性能研究[D].湖南大学,2013. |
| [26] | Pavel Krivenko;Rostislav Drochytka;Aleksandr Gelevera.Mechanism of preventing the alkali-aggregate reaction in alkali activated cement concretes[J].Cement & concrete composites,2014:157-165. |
| [27] | Michael Thomas.The effect of supplementary cementing materials on alkali-silica reaction: A review[J].Cement and Concrete Research,201112(12):1224-1231. |
| [28] | Shi, Zhenguo;Shi, Caijun;Zhao, Rui;Wan, Shu.Comparison of alkali-silica reactions in alkali-activated slag and Portland cement mortars[J].Materials and structures,20153(3):743-751. |
| [29] | Redmond R. Lloyd;John L. Provis;Jannie S.J. van Deventer.Pore solution composition and alkali diffusion in inorganic polymer cement[J].Cement and Concrete Research,20109(9):1386-1392. |
| [30] | 陈乔 .碱矿渣混凝土氯离子渗透及钢筋锈蚀性能研究[D].重庆大学,2008. |
| [31] | 张程浩;李悦;刘大成;严建华.碱激发粉煤灰固定氯离子能力及其机理的研究[J].唐山学院学报,2013(3):40-42,61. |
| [32] | Idawati Ismail;Susan A. Bernal;John L. Provis;Rackel San Nicolas;David G. Brice;Adam R. Kilcullen;Sinin Hamdan;Jannie S.J. van Deventer.Influence of fly ash on the water and chloride permeability of alkali-activated slag mortars and concretes[J].Construction and Building Materials,2013Nov.(Nov.):1187-1201. |
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