Interface Influence on Moisture Transport in Building Components (eBook)

The Wetting Process

João M. P. Q. Delgado, António C. Azevedo, Ana S. Guimarães (Autoren)

eBook Download: PDF

2019 | 1st ed. 2020
VIII, 62 Seiten
Springer International Publishing (Verlag)
978-3-030-30803-2 (ISBN)

Infos

The knowledge of moisture migration inside building materials and construction building components is decisive for the way they behave when in use. The durability, waterproofing, degrading aspect and thermal behaviour of these materials are strongly influenced by the existence of moisture within their interior, which provoke changes in their normal performance, something that is normally hard to predict. Due to the awareness of this problem, the scientific community have per-formed various studies about the existence of moisture inside porous materials. The complex aspects of moisture migration phenomenon tended to encompass monolithic building elements, since the existence of joints or layers contributes to the change of moisture transfer along the respective building element that contribute to the change of mass transfer law. The presentation of an experimental analyses concerning moisture transfer in the interface of material that makes up masonry is described in such a way as to evaluate the durability and/or avoid building damages.

In this work it was analysed, during the wetting process, the influence of different types of interface, commonly observed in masonry, such as: perfect con-tact, joints of cement mortar, lime mortar, and the air space interface. The results allow the calculation of the hygric resistance. With these results, it is possible to use any advanced hygrothermal simulation program to study the water transport in building elements, considering different interfaces and their hygric resistance.

Inhalt

Preface 6
Contents 7
1 Introduction 9
1.1 Motivation 9
1.2 Objectives and Methodology 11
References 11
2 State-of-the-Art 13
2.1 Introduction 13
2.2 Moisture and Interface Is Building Components 13
2.2.1 Moisture Transport in Buildings 13
2.2.2 Numerical Methods 15
2.2.3 Interface Influence on Moisture Transport 18
References 21
3 Moisture Content Determination 24
3.1 Introduction 24
3.2 Gravimetric Method 24
3.3 Nuclear Magnetic Resonance (NMR) Method 25
3.4 X-Ray Analysis 25
3.5 Gamma Ray Attenuation Method 26
3.5.1 Measurement Principles 27
3.5.2 Setup 29
3.5.3 Difficulty and Limitations 33
3.5.4 Example of Moisture Content Profiles 33
References 35
4 Interface Influence During the Wetting Process 37
4.1 Introduction 37
4.2 Preparation of the Specimens 39
4.3 Results and Discussion 43
4.3.1 Hygric Resistance 43
4.3.2 Synthesis 65
References 65
5 Conclusions 67

Produkt-Details

• Erscheint lt. Verlag: 10.9.2019
• Reihe/Serie: SpringerBriefs in Applied Sciences and Technology
• Reihe/Serie: SpringerBriefs in Applied Sciences and Technology
• Zusatzinfo: VIII, 62 p.
• Sprache: englisch
• Themenwelt: Technik ► Bauwesen
• Themenwelt: Technik ► Maschinenbau
• Schlagworte: building components • gamma rays • Historical Buildings • interface influence • metal support structure • Moisture transport • wetting process
• ISBN-10: 3-030-30803-0 / 3030308030
• ISBN-13: 978-3-030-30803-2 / 9783030308032