Water Absorption Properties of Geopolymer Foam after Being Impregnated with Hydrophobic Agents

Geopolymer foam is classified as a lightweight material with high porous in its matrix which has great offer for applications requiring fire-resistant, thermal, and acoustic properties. However, the high sensitivity to humid environments can be a major barrier of geopolymer foam that limits the vari...

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Bibliographic Details
Published in:Materials 2019-12, Vol.12 (24), p.4162
Main Authors: Chi, Hiep Le, Hájková, Pavlína, Van, Su Le, Louda, Petr, Voleský, Lukáš
Format: Article
Language:English
Subjects:
Absorptivity
Acoustic properties
Cement
Composite materials
Compressive strength
Concrete
Fire resistance
Flexural strength
Geopolymers
Heat resistance
Humidity
Hydrophobicity
Mechanical properties
Porous materials
Porous media
Silica
Thermal resistance
Viscosity
Water absorption
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Summary:Geopolymer foam is classified as a lightweight material with high porous in its matrix which has great offer for applications requiring fire-resistant, thermal, and acoustic properties. However, the high sensitivity to humid environments can be a major barrier of geopolymer foam that limits the variety of applications of this material. Based on this drawback, two types of hydrophobic agent (Lukosil M130 and Lukofob ELX) were used as an impregnator to treat the surface of geopolymer foam samples. This paper presented the results of water absorption properties of the untreated and treated geopolymer foam composites. The obtained properties were flexural strength, compressive strength, density, total water absorption, the rate of water absorption, and water absorption coefficient. The results showed that the samples after being impregnated with hydrophobic agents improved significantly their waterproof property especially using Lukosil M130. Moreover, the samples treated with Lukosil M130 had positive impact on their mechanical strength.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma12244162