Waterproofing Composite/Nanocomposite Coatings based on Cementitous/Emulsion Polymer: Introduction, Characteristic and Applications

Document Type : compile

Authors

Iranian Academic Center for Education, Culture & Research (ACECR), Nano Technology Group/ Fars Branch/ Shiraz/ Iran.

Abstract

Recently the use of acrylic-based polymers has attracted many industries specially construction, sealing and adhesives due to special and useful features. These polymers in combination with cement structures in form of composites and or nanocomposites could eliminate many existing defects of cement and concrete structures. In this study, a variety of cement-acrylic composites and nanocomposites and their properties are introduced and the bonding mechanism of hydrated cement with acrylic latex particles is presented. The results illustrate that using acrylic latex in cement mortar leads to modify the pore structure in cement and reduce water requirement. Mechanical properties like flexural strength and toughness have been dramatically improved. But it does not have a good effect on the compressive strength of the cement. Furthermore, corrosion resistance and weathering resistance have also been increased. Polyacrylics are resistant to discoloration and degradation due to low ultraviolet radiation absorption that leads to improvement of durability of the polyacrylic-cement composites. Addition of silica nanoparticles to acrylic-cement composites accelerates the hydration of the cement and reduces the amount of pores in the structure. However, because of the hydrophilic nature and the high surface area of the nanoparticles, the liquidity of the cement mortar decreases.

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References

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