Influence of Different Nanoparticles in Stone Silicon-Based Consolidant

Abstract

Weathering and air pollution compromise the preservation of historic buildings made of stone. The concept of the consolidation of materials is introduced to overcome this problem, or at least to reduce its severity. The consolidation consists of introducing a chemical substance into damaged stone for restoring its original mechanical properties, or into undamaged stone for preserving it. Silicon compounds, such as tetraethoxysilane, are frequently used for this purpose. Here, we present a time domain study of the sol-gel process using Dynasylan 40 with the addition of the nanoparticles of SiO2, Al2O3, TiO2 and CaCO3.

Use of nanosilica- or nanolime-additioned TEOS to consolidate cementitious materials in heritage structures: Physical and mechanical properties of mortars

“…Strategies developed to prevent this latter difficulty envisage combining the material with surfactants [12], additives [13] or nanoparticles [14,15,16,17].…”

Marble Consolidation: Can Nanomaterials Help?

“…Beside the promising results obtained by applying these products, alkoxysilanes (TEOS and MTMOS) continue to be used in consolidating marble substrates, even if the well-known disadvantages related to shrinkage, cracking, low chemical compatibility and limited long term performances of these products. For these reasons, researches are widely focused on ameliorating TEOS long performances with the addition of NPs; preliminary results have demonstrated an improvement in cracking and shrinkage of TEOS, allowing to obtain "tunable" products [20].…”