硅酸盐学报

硫酸铝盐水泥与硅酸盐水泥净浆水分蒸发区硫酸盐破坏对比

作者：刘赞群李湘宁邓德华候乐

单位：中南大学土木工程学院长沙 410075

分类号：O482.3

出版年,卷(期):页码：2016,44(8):1173-1177

DOI：10.14062/j.issn.0454-5648.2016.08.14

摘要：

将硫铝酸盐水泥净浆试件半浸泡在10%硫酸溶液中，运用环境扫描电子显微镜和X射线衍射仪研究了试件水分蒸发区的破坏特点，并对比了已有相同试验条件下硅酸盐水泥净浆试件破坏特征。结果表明：7 d后，硫铝酸盐水泥试件水分蒸发区产生了严重破坏，并在破坏部位检测到硫酸钠晶体，其破坏机理是硫酸盐物理结晶破坏；而硅酸盐水泥净浆试件水分蒸发区经过5个月后才产生破坏，在破坏净浆内部存在钙矾石和石膏等化学侵蚀产物，证明硫酸盐化学侵蚀破坏依然是主导普通硅酸盐水泥净浆试件水分蒸发区破坏的机理。

Calcium sulphoaluminate cement paste was partially immersed in 10% Na2SO4 solution. The products in the damaged paste were analyzed by X-ray diffraction and environment scanning electron microsopy. The damage in the evaporation zone of calcium sulphoaluminate cement paste was investigated. The results show that the evaporation zone is damaged seriously and the classic salt crystallization occurs in the damage zone for 7 d. The calcium sulphaliuminate cement paste damage is due to Na2SO4 crystals appeared in damaged paste. However, portland cement paste is damaged after 5-month exposure, and ettringite and gypsum can be formed. The chemical sulfate attack is due to portland cement paste damage.

基金项目：

国家自然科学基金项目(51378508)；长江学者和创新团队发展计划资助项目(IRT1296)；国家“973”计划项目(2013CB036201)资助。

作者简介：

刘赞群(1975—)，男，教授，博士研究生导师。

参考文献：

[1] Haynes H, Bassuoni M T. Physical salt attack on concrete[J]. Concr Int, 2011, 33(11): 38–42.
[2] ACI committee web letter: 201.2R Chapter 8 Physical Salt Attack [S]. 2010.
[3] 邓德华, 刘赞群, Geer DE SCHUTTER, 等. 关于“混凝土硫酸盐结晶破坏”理论的研究进展[J]. 硅酸盐学报, 2012, 40(2): 175–185.
LIU Zanqun, DENG Dehua, DE SCHUTTE G, et al. J Chin Chem Soc, 2012, 40(2): 175–185.
[4] Ruiz-Agudo E, Mees F, Jacobs P, et al. The role of saline solution properties on porous limestone salt weathering by magnesium and sodium sulfates [J]. Environ Geol, 2007, 52(2): 305–317.
[5] HAYNES H, O’NEILL R, NEFF M, et al. Salt weathering distress on concrete exposed to sodium sulfate environment [J]. J ACI Mater, 2008, 105(1): 35–43.
[6] HAYNES H, O’NEILL R, NEFF M, et al. Salt weathering of concrete by sodium carbonate and sodium chloride [J]. J ACI Mater, 2010, 107(3): 256–266.
[7] 刘赞群, 邓德华, DE SCHUTTE G, 等. “混凝土硫酸盐结晶破坏”微观分析(I)—水泥净浆[J]. 硅酸盐学报, 2012, 40(2): 186–193.
LIU Zanqun, DENG Dehua, DE SCHUTTE G, et al. J Chin Chem Soc, 2012, 40(2): 186–193.
[8] 刘赞群, 邓德华, DE SCHUTTE G. “混凝土硫酸盐结晶破坏”微观分析(II)—混凝土[J]. 硅酸盐学报, 2012, 40(5): 631–637.
LIU Zanqun, DENG Dehua, DE SCHUTTE G, et al. J Chin Chem Soc, 2012, 40(5): 631–637.
[9] 王燕谋, 苏慕珍, 张量, 等. 硫铝酸盐水泥[M]. 北京工业大学出版社, 北京, 1999: 149–154.
[10] Damidot D, Atkins M, Kindness A, et al. Sulphate attack on concrete: limits of the AFt stability domain [J]. Cem Concr Res, 1992, 22(2/3): 229–234.
[11] Shi C, Day Robert L. Pozzolanic reaction in the presence of chemical activators: Part II. Reaction products and mechanism [J]. Cem Concr Res. 2000, 30(4): 607–613.
[12] Nishikawa T, Suzuki K, Ito S. Decomposition of synthesized ettringite by Carbonation [J]. Cem Concr Res, 1992, 22(1): 6–14.
[13] Chen X, Zou R. Kinetic study of ettringite carbonation reaction[J]. Cem Concr Res, 1994, 24(7): 1383–1389.
[14] Liu Z, Deng D, SchutteR G De, et al. Chemical sulfate attack performance of partially exposed cement and cement + fly ash paste [J]. Constr Build Mater, 2012, 28(1): 230–237.
[15] Flatt R J, Steiger M, Scherer G W. A commented translation of the paper by C.W. Correns and W. Steinborn on crystallization pressure [J]. Environ Geol, 2007, 52(2): 187–203.
[16] Scherer G W. Factors affecting crystallization pressure [C] // International RILEM TC 186-ISA workshop and internal sulfate attack and delayed ettringite formation, 2002, Villars, Switzerland.
[17] Houck J, Scherer G W. Controlling Stress from Salt Crystallization [R]. Fracture and Failure of Natural Building Stones, Springer, Dordrecht, 2006: 299–312.
[18] Liu Z, Li X, Deng D, DE SCHUTTE G. The damage of calcium sulfoaluminate cement paste partially immersed in MgSO4 solution [J]. Mater Struct, 2016, 49(1): 719–727.

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