Status reports
WTA-Status reports
A WTA status report describes neutrally (i.e. without personal evaluation) the current state of the art in the field of building preservation and monument preservation. Status reports are prepared by a WTA working group approved by the WTA presiding committee in cooperation with all interested circles and in agreement with them.
From TC 4 - Waterproofing
"Measuring the moisture content of mineral building materials" / "Messung der Feuchte von mineralischen Baustoffen"
Publisher: WTA-TC 4 “Waterproofing”
Working group 4.11
Head: Prof. Dr.-Ing. Günter Rieche
published in Fraunhofer IRB Verlag, 2004
ISBN (Print): 3-8167-6353-7 (out of stock)
ISBN (E-Book): 978-3-7388-0046-3
Content
The aim of measuring the moisture content of building materials is to provide a basis for planning the repair of structures. This report provides an overview and evaluation of existing methods for measuring the moisture content of mineral building materials. The authors describe the definitions of the moisture-related parameters of building materials, examine the relevant measurement methods, and explain the tried-and-tested methods: the drying method and the CM method, as well as the foil test and the relative humidity equalisation method.
Fraunhofer IRB Verlag has made the e-book (in German) available as a free download on its website.
From TC 5 "Concrete"
"Cathodic corrosion protection of steel in concrete (CCPC)" / "Kathodischer Korrosionsschutz von Stahl in Beton (KKSB)"
Author: Dipl.-Ing. Sabine Heinz
Editorial processing:
Prof. Felix Wenk
Hochschule für Technik Rapperswil, Studiengang Bauingenieurwesen
Oberseestraße 10, CH-8640 Rapperswil
Dr.-Ing. Schneck
CITec Concrete Improvement Technologies GmbH
Dresdner Straße 42, D-01156 Cossebaude
Dipl.-Ing. Rüdiger Burkhardt
Ingenieurbüro für Bauwerkserhaltung Weimar GmbH
Zum Hospitalgraben 2, D-99425 Weimar
Zusammenfassung
Der kathodische Korrosionsschutz von Stahl in Beton hat sich in der Praxis besonders im Bereich Parkhäuser und Tiefgaragen als eine erfolgreiche Technik erwiesen, die Korrosion zu begrenzen und die Dauerhaftigkeit wieder herzustellen. Verschiedene Arten von Anodensystemen stehen dafür zur Verfügung. Diese unterscheiden sich hinsichtlich ihrer Leistungsfähigkeit und Dauerhaftigkeit, darauf wird im folgenden Bericht eingegangen.
Summary
Cathodic Protection (CP) of reinforced concrete is usually used in the field of multi-storey car parks or basement car parks. This method has proved to be a sucessful technique to limit corrosion and to gain durability. Different kinds of anodes may be used, but the performance and durability can vary quite much. This report explaines these diffenences in order to achieve a sucessful longterm protection.
Free download of the full status report.