thaumasite

A cylinder of calcium carbonate hanging from the roof of a limestone cave. Research on Influencing Factors of Thaumasite Form of Sulfate Attack Towards Cement Based Materials

从石灰石洞的顶上悬挂的碳酸钙圆柱体。水泥基材料碳硫硅钙石型硫酸盐侵蚀影响因素研究

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Thaumasite Formation and Effect on Limestone Cement Concrete

碳硫硅钙石的形成及其对混凝土性能的影响

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This is the first discovery of thaumasite form of sulfate attack in China. Thaumasite form of sulfate attack on concrete

这是在我国发现的首例碳硫硅钙石型硫酸盐腐蚀。混凝土中Thaumasite硫酸盐侵蚀的形成与特征

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The formation reaction affect different admixtures Thaumasite.

研究了不同外加剂对Thaumasite形成反应影响。

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Thaumasite form of sulfate attack on different variety of cement

不同品种水泥的抗碳硫硅酸钙型硫酸盐侵蚀性能

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Thaumasite is prone to decomposed easily in the high concentration of CO2.

碳硫硅钙石在高浓度CO2作用下容易发生分解。

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As a result, it is shown that a mushy mixture consisting of thaumasite, ettringite, gypsum and calcite occurs in the residual concrete exposed to low temperature, high humidity, sulfate and carbonate for a long time.

结果表明，低温、高湿、硫酸盐和碳酸盐长期共同作用下混凝土的腐蚀产物是由硅灰石膏、钙矾石、石膏和方解石组成的一种稀泥状混合物。

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Research on Influence Factor of the Thaumasite Form of Sulfate Attack on Cement Concrete

水泥混凝土TSA侵蚀影响因素研究

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The sulphuric acid has eaten into these steel pipes. Thaumasite form of sulfate attack of cementitious materials

硫酸已腐蚀了这些钢管。水泥基材料碳硫硅钙石型硫酸盐腐蚀

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The results show that the resistance of mortar to thaumasite form of sulfate attack ( TSA) increases with the reduction of water-cement ratio.

结果表明，水灰比越低，砂浆抗TSA侵蚀性能越好；

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Last by admixture added explore inhibiting Thaumasite sulfate attack in cementitious systems.

通过在胶凝材料体系加入外加剂探索抑制Thaumasite型硫酸盐侵蚀的方法。

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A summary of the research on thaumasite form of sulfate attack

碳硫硅钙石型硫酸盐腐蚀研究综述

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Discovery of thaumasite in China

我国发现的硅灰石膏水泥基材料中的碳硫硅钙石

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Structural Characteristic and Formation Mechanism of Thaumasite and Its Destruction Effect on Concrete

Thaumasite的结构、形成机理及对混凝土的破坏作用

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Results show that paste containing ground limestone can be destroyed at the temperature of 0& 10 ℃ by the sulphate attack of thaumasite form.

结果表明：掺石灰石粉的水泥石在0~10℃的温度范围内，可形成碳硫硅钙石的硫酸盐侵蚀破坏。

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According to the microstructure development of mortar, TSA includes the following four procedures: diffusion of ions, ettringite formation, gypsum formation and thaumasite formation.

从微观角度分析，将TSA侵蚀过程分为四个阶段：离子迁移期，钙矾石生成期，石膏生成期和碳硫硅酸钙生成期.评价的形成性问题；

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Effects of temperatures on thaumasite formation

温度对碳硫硅钙石形成的影响

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Based cementitious materials in the limestone powder mixed with borax to a certain extent delay Thaumasite form, but can not suppress Thaumasite formation increased with the dosage of borax, the more significant the delay formation of Thaumasite effect.

石灰石粉基胶凝材料中掺入硼砂延缓Thaumasite形成，但不能抑制Thaumasite形成，随着硼砂的掺量增加，延缓Thaumasite形成效果越显著。

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Test methods for thaumasite form of sulfate attack

碳硫硅酸钙型硫酸盐侵蚀测试方法

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Thaumasite form of sulfate attack in the concrete of Yong'an dam

新疆永安坝混凝土的碳硫硅钙石型硫酸盐腐蚀

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Research on Influencing Factors of Thaumasite Form of Sulfate Attack Towards Cement Based Materials

水泥基材料碳硫硅钙石型硫酸盐侵蚀影响因素研究

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Cement concrete may undergo the thaumasite form of sulfate attack when it is exposed to low temperature, high humidity, sulfate, carbonate and adequate water for a long period of time.

TSA侵蚀是水泥混凝土在低温、高湿、硫酸盐与碳酸盐长期作用下发生的一种特殊的硫酸盐侵蚀形式。

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Dry-wet circulation and carbonation influencing on the concrete sulfate attack Thaumasite form of sulfate attack of cementitious materials

干湿交替和碳化对混凝土硫酸盐侵蚀的影响水泥基材料碳硫硅钙石型硫酸盐腐蚀

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The lower the temperature is, the earlier the thaumasite formation is.

环境温度越低, 碳硫硅钙石形成得越早.

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Thaumasite form of sulfate attack on concrete

混凝土中Thaumasite硫酸盐侵蚀的形成与特征

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This form of attack directly leads to the decomposition of CSH gel and formation of the non-binder thaumasite crystal in the cement paste. As a result, the attacked concrete becomes a white mushy and friable mixture.

它直接导致水泥石中CSH凝胶体的分解，生成无任何胶结性的硅灰石膏（thaumasite）晶体，使混凝土最终变为一种白色的烂泥状混合物。

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Becoming architecture Structural characteristic, forming mechanism and the conditions conducive to formation of thaumasite are discussed.

分析了Thaumasite的物相结构特征、生成条件和破坏机理；

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X-ray diffraction, scanning electron microscope, energy dispersive spectrum and laser Raman spectrum analysis were used to identify thaumasite in paste sample stored in 10% ( in mass) of MgSO_ ( 4) solution at different temperatures.

将浸泡于不同温度的质量分数为10%的MgSO4溶液中的含石灰石粉水泥石试样进行X射线衍射分析、扫描电子显微分析、能谱分析和激光Raman光谱分析。

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