TY - JOUR
T1 - Experimental research on salt contamination procedures and methods for assessment of the salt distribution
AU - Nunes, Cristiana
AU - Maria Aguilar Sanchez, Asel
AU - Godts, Sebastiaan
AU - Gulotta, Davide
AU - Ioannou, Ioannis
AU - Lubelli, Barbara
AU - Menendez, Beatriz
AU - Shahidzadeh, Noushine
AU - Slížková, Zuzana
AU - Theodoridou, Magdalini
PY - 2021
Y1 - 2021
N2 - The RILEM TC ASC-271 is developing a new laboratory test to assess the durability of porous building materials to salt crystallisation. The test encompasses two phases: salt accumulation and damage propagation. This paper focuses on designing a procedure for the accumulation phase; this is considered successful when salts crystallise at the material's evaporative surface (common situation observed on site) without the occurrence of damage. Two procedures were developed and tested on two limestones with different porosity: (1) capillary absorption of a salt solution followed by drying, and (2) continuous capillary absorption. Sodium chloride or sodium sulphate solutions were used. Several methods for assessing the salt distribution were employed: ultrasonic pulse velocity, drilling/scratching resistance, hygroscopic moisture content, ion chromatography, scanning electron microscopy, and micro X-ray fluorescence. The results enabled the selection of the most effective protocol for the salt accumulation phase.
AB - The RILEM TC ASC-271 is developing a new laboratory test to assess the durability of porous building materials to salt crystallisation. The test encompasses two phases: salt accumulation and damage propagation. This paper focuses on designing a procedure for the accumulation phase; this is considered successful when salts crystallise at the material's evaporative surface (common situation observed on site) without the occurrence of damage. Two procedures were developed and tested on two limestones with different porosity: (1) capillary absorption of a salt solution followed by drying, and (2) continuous capillary absorption. Sodium chloride or sodium sulphate solutions were used. Several methods for assessing the salt distribution were employed: ultrasonic pulse velocity, drilling/scratching resistance, hygroscopic moisture content, ion chromatography, scanning electron microscopy, and micro X-ray fluorescence. The results enabled the selection of the most effective protocol for the salt accumulation phase.
KW - Porous materials
KW - Salt accumulation
KW - Salt crystallisation test
KW - Salt distribution
UR - http://www.scopus.com/inward/record.url?scp=85107731011&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2021.123862
DO - 10.1016/j.conbuildmat.2021.123862
M3 - Article
AN - SCOPUS:85107731011
SN - 0950-0618
VL - 298
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 123862
ER -