TY - JOUR

T1 - Evaluation of the wettability of mortar component granular materials through contact angle measurements

AU - Klein, Nayara S.

AU - Bachmann, Jörg

AU - Aguado, Antonio

AU - Toralles-Carbonari, Berenice

N1 - Funding information: We thank the Institute of Building Materials at Leibniz Universität Hannover and Prof. Dr.-Ing. Ludger Lohaus for the laboratory assistance provided. For financial support, we thank the AGAUR Agència de Gestió d'Ajuts Universitaris i de Recerca (Agency of Scholarship Management and Research) of the government of Catalonia and the Ministry of Science and Innovation of the government of Spain through the project BIA2010-20913-C02-02 . A special thank you goes to Susanne Woche and Stephan Sass for their invaluable help.

PY - 2012/12

Y1 - 2012/12

N2 - The wettability of granular materials has a direct effect on the workability of pastes, mortars and concretes containing such materials. Given this, the wetting behaviour of two Portland cements, two mineral admixtures (limestone filler and silica fume) and different sand types (siliceous, limestone and granite) was evaluated through the measurement of the contact angle between these materials and water. The results show that all the materials possess high wettability. A chemical agent, dichlorodimethylsilane, was used to modify the surface properties of a 0-1 mm siliceous sand, making it more hydrophobic and, therefore, unable to be spontaneously wetted by water. The properties of a mortar produced with the silane-treated sand were evaluated, showing improvements on workability as a result of the chemical treatment.

AB - The wettability of granular materials has a direct effect on the workability of pastes, mortars and concretes containing such materials. Given this, the wetting behaviour of two Portland cements, two mineral admixtures (limestone filler and silica fume) and different sand types (siliceous, limestone and granite) was evaluated through the measurement of the contact angle between these materials and water. The results show that all the materials possess high wettability. A chemical agent, dichlorodimethylsilane, was used to modify the surface properties of a 0-1 mm siliceous sand, making it more hydrophobic and, therefore, unable to be spontaneously wetted by water. The properties of a mortar produced with the silane-treated sand were evaluated, showing improvements on workability as a result of the chemical treatment.

KW - Contact angle

KW - Mortar (E)

KW - Workability (A)

UR - http://www.scopus.com/inward/record.url?scp=84870001894&partnerID=8YFLogxK

U2 - 10.1016/j.cemconres.2012.09.001

DO - 10.1016/j.cemconres.2012.09.001

M3 - Article

AN - SCOPUS:84870001894

VL - 42

SP - 1611

EP - 1620

JO - Cement and concrete research

JF - Cement and concrete research

SN - 0008-8846

IS - 12

ER -