RT journal article
T1 Producing C-S-H gel by reaction between silica oligomers and portlandite: A promising approach to repair cementitious materials
A1 Zarzuela Sánchez, Rafael
A1 Luna Aguilera, Manuel Jesús
A1 Martínez Carrascosa, Luis Antonio
A1 Yeste Siguenza, María del Pilar
A1 Garcia-Lodeiro, Inés
A1 Blanco-Varela, María Teresa
A1 Cauqui López, Miguel Ángel
A1 Rodríguez-Izquierdo Gil, José María
A1 Mosquera Díaz, María Jesús
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
A2 Química Física
K1 Concrete
K1 Building materials
K1 Silanes
K1 Consolidants
K1 Building conervation
AB Impregnation treatments are one of the alternatives to protect concrete-based building and monuments from weathering degradation. However, it is important to consider the chemical compatibility of the reaction products with the building material. The impregnation product studied here consists of a silica oligomer able to poly- merize, by a simple sol-gel process, inside the pore structure of concrete. In this work, we investigate the ability of this impregnation treatment to produce C-S-H gel in contact with cement paste. A complete characterization of the reaction products demonstrated that the silanol groups from silica oligomers react with the portlandite present in the cement paste generating a material with the chemical, structural and morphological features of C- S-H gel. Simultaneously, the 29Si NMR results indicate that the SieO units are incorporated into the existing C-S- H, increasing its chain length. These results open the way for a simple concrete structures repairing procedure.1.
PB Elsevier
SN 0008-8846
YR 2020
FD 2020-01-30
LK http://hdl.handle.net/10498/25618
UL http://hdl.handle.net/10498/25618
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 07-nov-2026