A high proportion of the world's cultural heritage is built in stone, and it is slowly but inexorably disappearing. The deterioration of stone is very familiar to anyone who has looked closely at a historic stone building or monument. For the present study two types of rock, from Spain and Romania, were selected by regional significance, abundance and importance, level of usage as building materials in the construction of monumental buildings. The first selected rock is a bright white micritic dolomitic stone, typical from the Spanish region of Asturias (Oviedo), called Laspra, being used as one of the three main building materials of the Cathedral of Oviedo. Important parts of churches listed in UNESCO’s World Heritage List: Santa Maria del Naranco and San Miguel de Lillo were built by using Laspra. The second selected stone is coming from Romania and it can be described as a bioclastic oolitic stone, named Repedea. One of the most important monasteries of Romania, Dobrovat, was built from Repedea.

Stone samples were first characterized by thin section polarizing microscopy POL (phase composition, texture, grain-size distribution), as well as XRD  and FTIR techniques, respectively (mineral composition, crystallographic structure). Then the samples were prepared by casting the same amount of a silsesquioxanes polymer-based obtained through sol-gel approach and radical polymerization of trimethoxysilylpropyl methacrylate (TMSPMA) onto powder stones. These products polymerize within the stone pores, thereby strengthening the material. In the consolidant synthesis the sol-gel transition occurs in the presence of a surfactant. This provides an efficient means of avoiding cracking of the gel while it is drying inside the stone.

A comparative study has been made between the two types of stones consolidated with TMSPMA polymer. Due to the different composition of stones; the deposited polymer has different behaviors put in evidence by XRD and FTIR techniques. Conclusions concerning acid resistance, water repellency, stone consolidation and durability were revealed.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/15277 must be provided.

1. Preparation and characterization of polysulfone membranes containing Ag nanoparticles by a convenient ultraviolet irradiation technique
2. Physical and chemical techniques to improve surface proprieties of polyesters films
3. Silsesquioxane-based hybrid nanocomposites of polymethacrylate type with self-assembling properties
4. Novel segmented polyurethane-based nanocomposites