Materials Reports  2021, Vol. 35 Issue (Z1): 247-250 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Influence of Permeable Crystalline Surface Protective Agent on Durability of Concrete |
| LI Chongzhi, WANG Mengyu, NIU Zhenshan
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| School of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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Abstract Adopting styrene-acrylic emulsion, sodium methyl silicate, water glass, triisopropanolamine TPA and magnesium fluorosilicate to configure the permeable crystalline surface protective agent, which has a significant effect on the long-term durability of hardened concrete. When the self-made permeable crystalline surface protective agent is diluted and configured into a solution with a mass fraction of 0.5 to 0.75, it can maximize the ability of concrete to resist carbonization and reduce the mass loss and strength loss of the test block under dry and wet cycles.At this concentration, the carbonization depth can be reduced by 20% compared with the blank group, and the crack area is reduced by about 46.7%. Through XRD and SEM experiments to analyze its mechanism, the active substance of the composite protective agent can penetrate into the concrete to react, and complex reaction with silicate hydrate and calcium hydroxide in the concrete, and in the pore cracks hydrophobic complexes are formed on the surface, which has the function of compact filling and water repellent penetration.
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Published: 16 July 2021
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| About author:: Chongzhi Li, a professor at Beijing Jianzhu University, graduated with a Ph.D. in civil engineering from Tsinghua University in 2004. He is mainly engaged in the development and application of concrete admixtures,there is as anti-cracking and anti-corrosion additives used in Concrete. |
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