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Materials 2014, 7(1), 399-412; doi:10.3390/ma7010399
Article

A Study of Crystalline Mechanism of Penetration Sealer Materials

1
,
1
,
2
,
2
 and
2,*
1 Department of Harbor and River Engineering, National Taiwan Ocean University, No.2 Pei-Ning Road, Keelung 20224, Taiwan 2 Department of Civil Engineering, National Ilan University, No.1, Sec. 1, Shen-Lung Road, I-Lan 26047, Taiwan
* Author to whom correspondence should be addressed.
Received: 23 November 2013 / Revised: 31 December 2013 / Accepted: 7 January 2014 / Published: 14 January 2014
(This article belongs to the Special Issue Construction Materials)
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Abstract

It is quite common to dispense a topping material like crystalline penetration sealer materials (CPSM) onto the surface of a plastic substance such as concrete to extend its service life span by surface protections from outside breakthrough. The CPSM can penetrate into the existing pores or possible cracks in such a way that it may form crystals to block the potential paths which provide breakthrough for any unknown materials. This study investigated the crystalline mechanism formed in the part of concrete penetrated by the CPSM. We analyzed the chemical composites, in order to identify the mechanism of CPSM and to evaluate the penetrated depth. As shown in the results, SEM observes the acicular-structured crystals filling capillary pores for mortar substrate of the internal microstructure beneath the concrete surface; meanwhile, XRD and FT-IR showed the main hydration products of CPSM to be C-S-H gel and CaCO3. Besides, MIP also shows CPSM with the ability to clog capillary pores of mortar substrate; thus, it reduces porosity, and appears to benefit in sealing pores or cracks. The depth of CPSM penetration capability indicated by TGA shows 0–10 mm of sealer layer beneath the concrete surface.
Keywords: crystalline penetration sealer materials (CPSM); waterproof; C-S-H gel; water permeability; rapid chloride permeability test (RCPT); mercury intrusion porosimetry (MIP); X-ray diffraction (XRD); scanning electron microscope (SEM); fourier transform infrared spectroscopy (FT-IR); thermogravimetric analyzer (TGA) crystalline penetration sealer materials (CPSM); waterproof; C-S-H gel; water permeability; rapid chloride permeability test (RCPT); mercury intrusion porosimetry (MIP); X-ray diffraction (XRD); scanning electron microscope (SEM); fourier transform infrared spectroscopy (FT-IR); thermogravimetric analyzer (TGA)
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Teng, L.-W.; Huang, R.; Chen, J.; Cheng, A.; Hsu, H.-M. A Study of Crystalline Mechanism of Penetration Sealer Materials. Materials 2014, 7, 399-412.

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