A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The damage of calcium sulfoaluminate cement paste partially immersed in $ MgSO_{4} $ solution
Abstract One of controversies on the sulfate salt weathering of ordinary concrete is that $ MgSO_{4} $ does not show physical crystallization distress on concrete as the same as on masonry. In this paper, the Calcium sulfoaluminate (CSA) cement paste was partially immersed in 10 % $ MgSO_{4} $ solution to study if $ MgSO_{4} $ crystal can be identified in the damaged paste because the hydration products of CSA cement paste do not contain Ca (OH)2 that playing a vital role in chemical sulfate attack on concrete. The results showed that the low parts in the solution showed more severe damage observation than the upper part in contact with air after 5 months exposure. $ MgSO_{4} $ could not be identified in the damaged paste of upper part. The damage of paste was still a typical chemical sulfate attack characterized by amounts of $ CaSO_{4} $·$ 2H_{2} $O crystals formation due to the decomposition of ettringite by $ Mg^{2+} $, even without the effect of Ca (OH)2. The so-called physical sulfate attack still cannot be confirmed on $ MgSO_{4} $ attack on CSA cement paste.
The damage of calcium sulfoaluminate cement paste partially immersed in $ MgSO_{4} $ solution
Abstract One of controversies on the sulfate salt weathering of ordinary concrete is that $ MgSO_{4} $ does not show physical crystallization distress on concrete as the same as on masonry. In this paper, the Calcium sulfoaluminate (CSA) cement paste was partially immersed in 10 % $ MgSO_{4} $ solution to study if $ MgSO_{4} $ crystal can be identified in the damaged paste because the hydration products of CSA cement paste do not contain Ca (OH)2 that playing a vital role in chemical sulfate attack on concrete. The results showed that the low parts in the solution showed more severe damage observation than the upper part in contact with air after 5 months exposure. $ MgSO_{4} $ could not be identified in the damaged paste of upper part. The damage of paste was still a typical chemical sulfate attack characterized by amounts of $ CaSO_{4} $·$ 2H_{2} $O crystals formation due to the decomposition of ettringite by $ Mg^{2+} $, even without the effect of Ca (OH)2. The so-called physical sulfate attack still cannot be confirmed on $ MgSO_{4} $ attack on CSA cement paste.
The damage of calcium sulfoaluminate cement paste partially immersed in $ MgSO_{4} $ solution
Liu, Zanqun (author) / Li, Xiangning (author) / Deng, Dehua (author) / De Schutter, Geert (author)
2015
Article (Journal)
English
The damage of calcium sulfoaluminate cement paste partially immersed in $ MgSO_{4} $ solution
| Online Contents | 2015
The damage of calcium sulfoaluminate cement paste partially immersed in MgSO4 solution
| British Library Online Contents | 2016
The damage of calcium sulfoaluminate cement paste partially immersed in MgSO4 solution
| Online Contents | 2016
The damage of calcium sulfoaluminate cement paste partially immersed in MgSO4 solution
| Springer Verlag | 2015