Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Minimal Drilling Technique to Measure Chloride-Penetration Depth and Carbonation Depth in Concrete
A method was investigated to determine concrete durability by measuring the carbonation depth and chloride ion () penetration depth. Under the proposed method, a 1- or 2-mm-diameter hole was drilled into a concrete surface and the hole’s walls were sprayed with either a phenolphthalein or silver nitrate solution to observe the carbonation depth or penetration depths using an inserted 0.6-mm-diameter fiberscope. This method is intended to be a highly accurate, semidestructive test of concrete durability that causes minimum damage to the inspected concrete structure. It was found through visual observation and image analysis that when coloring the 1-mm drill holes with phenolphthalein, the holes had to be sufficiently dried before observation, whereas when coloring with silver nitrate, no special pretreatment was required. The results of the proposed method were compared with measurements using calipers on cut surfaces, demonstrating that the proposed method yields highly reliable measurements of parameters describing concrete durability.
Minimal Drilling Technique to Measure Chloride-Penetration Depth and Carbonation Depth in Concrete
A method was investigated to determine concrete durability by measuring the carbonation depth and chloride ion () penetration depth. Under the proposed method, a 1- or 2-mm-diameter hole was drilled into a concrete surface and the hole’s walls were sprayed with either a phenolphthalein or silver nitrate solution to observe the carbonation depth or penetration depths using an inserted 0.6-mm-diameter fiberscope. This method is intended to be a highly accurate, semidestructive test of concrete durability that causes minimum damage to the inspected concrete structure. It was found through visual observation and image analysis that when coloring the 1-mm drill holes with phenolphthalein, the holes had to be sufficiently dried before observation, whereas when coloring with silver nitrate, no special pretreatment was required. The results of the proposed method were compared with measurements using calipers on cut surfaces, demonstrating that the proposed method yields highly reliable measurements of parameters describing concrete durability.
Minimal Drilling Technique to Measure Chloride-Penetration Depth and Carbonation Depth in Concrete
Tanaka, Shunsei (Autor:in) / Sakai, Yuya (Autor:in)
18.06.2020
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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