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Proceedings pro080 : 2nd International Workshop on Concrete Spalling due to Fire Exposure


Title: 2nd International Workshop on Concrete Spalling due to Fire Exposure
Edited by E.A.B. Koenders and F. Dehn
ISBN: 978-2-35158-118-6
e-ISBN: 978-2-35158-119-3
Pages: 453
Publication date: 2011

Controlling the sensitivity of concrete to its (explosive) spalling behaviour during fire exposure is one of today's major issues in the design and construction of concrete structures. Fires - such as the Channel tunnel fire - indicated that spalling of concrete can have serious structural and economical consequences and is a phenomenon that should be taken into account when designing for fire.

Developments in concrete mix design have lead to new types of concrete - such as high strength, ultra-high strength and self--compacting concrete - which, besides an increased structural performance, also have shown a different sensitivity to spalling due to fire exposure. However, until now the sensitivity of a concrete as a material and for structures to spalling is not fully understood. More research is needed to understand the mechanisms behind spalling in order to be able to quantify the risk of spalling.

This workshop focuses on spalling of concrete due to fire exposure and emphasizes real life experiences and observations, practical applications and developments in experimental testing, and numerical modelling. The aim of this workshop is to obtain an overview of the state of the art level of knowledge, to exchange results and to stimulate the discussion between researches and representatives from the industry.


Contents


Preface
Author(s): E.A.B. Koenders and F. Dehn
Pages: XVII - XVII

Keynote lectures


Fire protection requirements and solutions for international tunnel projects
Author(s): C. Schulte, A. Schaab
Pages: 3 - 17

Evolution of spalling with time and age
Author(s): C. Lenglet
Pages: 19 - 24

Numerical simulation of concrete exposed to high temperature – Damage and explosive spalling
Author(s): J. Ožbolt, J. Bošnjak, G. Periškić and C. Grosse
Pages: 25 - 32

The age effect on fire spalling of concrete
Author(s): L. Boström, R. Jansson
Pages: 33 - 41

Impedance spectroscopy to characterise microsctructural changes in liquid and solid phases of mortars exposed to high temperature
Author(s): I. Sánchez, M. Sánchez, M.A. Climent, and M.C. Alonso
Pages: 43 - 51

Macro-scale spalling model: a fracture mechanics versus pore pressure approach
Author(s): B.B.G. Lottman, E.A.B. Koenders, J.C. Walraven
Pages: 53 - 65

Chapter 1 - Pore pressure


Monitoring of fire damage processes in concrete by pore pressure and acoustic emission measurements
Author(s): F. Pereira, K. Pistol, M. Korzen, F. Weise, P. Pimienta, H. Carré, S. Huismann
Pages: 69 - 77

Study of vapor pressure of high performance concrete and self-compacting concrete slabs subjected to standard fire conditions
Author(s): G. Ye, G. De Schutter and L. Taerwe
Pages: 79 - 86

Effect of the measurement technique on the amount of maximum pore pressures measured inside concrete subjected to high temperatures
Author(s): R.B. Mugume, T. Horiguchi
Pages: 87 - 94

Gas transfers and flow process through concrete maintained in temperature
Author(s): R. Haniche, G. Debicki, A. Bouamrane, E. Zeltz
Pages: 95 - 102

Experimental assessment of the contribution of synthetic fibers to the moisture release of concrete exposed to high temperatures
Author(s): J.A. Capote, D. Alvear, O.V. Abreu and J. Crespo
Pages: 103 - 112

Influence of water content on gas pore pressure in concretes at high temperature
Author(s): J-C. Mindeguia, P. Pimienta, I. Hager, H. Carré
Pages: 113 - 121

Chapter 2 - Mechanical properties


Punching shear tests on flat concrete slabs at high temperatures
Author(s): E. Annerel, L. Lu and L. Taerwe
Pages: 125 - 131

Thermo-mechanical behavior of continuous sisal fiber cement based composite systems
Author(s): Joăo A. Melo Filho, Romildo D. Toledo Filho and Flávio de A. Silva
Pages: 133 - 140

An experimental investigation on the effect of impact and static loading of fiber reinforced refractory concrete exposed to high temperatures
Author(s): Romildo D. Toledo Filho, Flávio de A. Silva, Guilherme Q. Romano and Luiz M. M. Tavares
Pages: 141 - 148

Influence of aggregate’s nature on their instability at elevated temperature
Author(s): Z. Xing, R. Hébert, A.-L. Beaucour, B. Ledésert, A. Noumowé, Nancy Linder
Pages: 149 - 156

Spalling of HPC evaluated by acoustic emission and numerical analysis
Author(s): C. Grosse, R. Richter, J. Ozbolt, F. Dehn, M. Juknat
Pages: 157 - 163

Mechanical characteristics of fiber reinforced self-compacting concretes exposed to elevated temperatures
Author(s): K. K. Sideris, P. Manita and E. Tsanaktsidis
Pages: 165 - 172

Short term reduction of mechanical properties of high strength concrete after cooling to ambient temperature
Author(s): N. Torić, M. Jelčić Rukavina, D. Bjegović and B. Peroš
Pages: 173 - 180

Moisture transport and dehydration in heated gypsum, an NMR study
Author(s): G.H.A. van der Heijden, L. Pel and K. Kopinga
Pages: 181 - 188

An experimental method to investigate concrete spalling in temperature
Author(s): G. Debicki, R. Haniche and F. Delhomme
Pages: 189 - 195

Explosive spalling and residual mechanical properties of reactive powder concrete subjected to high temperature
Author(s): G.F. Peng, Y.R. Kang, X.P. Liu, Q. Chen and J. Zhao
Pages: 197 - 204

Fire in storehouse 6 in the free port of stockholm
Author(s): R. Jansson and K. Ödeen
Pages: 205 - 210

Chapter 3 - Modelling


Simulation about effect on explosion spalling of thermal stress and vapor pressure
Author(s): H. Nakamura, K. Yoshida, M. Kunieda, N. Ueda, Y. Yamamoto and M. Ozawa
Pages: 213 - 219

A finite element modeling of thermo-hydromechanical behavior and numerical simulations of progressing spalling front
Author(s): M.T. Phan, F. Meftah, S. Rigobert, P. Autuori, C. Lenglet, S. Dalpont
Pages: 221 - 226

Explosive spalling of concrete materials under extreme environments
Author(s): Kaspar Willam, Keun K. Lee, Yunping Xi, G. Xotta, and V. Salomoni
Pages: 227 - 236

Meso-mechanical modeling of thermal spalling in concrete using fracture-based zero-thickness interface elements
Author(s): M. Rodríguez, C.M. López, I. Carol and K.J. Willam
Pages: 237 - 244

Chapter 4 - Protection methods / PP-fibres


Latest developments of structural fire protection for German road tunnels
Author(s): J. Blosfeld and I. Kaundinya
Pages: 247 - 254

Experimental study on reinforced concrete segment using fireproof concrete for shield tunnel in highway or railway
Author(s): T. Arai and K. Furuichi
Pages: 255 - 262

A study on the effects of fire-resistant coating materials on preventing the spalling of concrete and change of cement hydrates
Author(s): Myongshin Song, Seungmin Kang and Hyunju Kang
Pages: 263 - 270

Effects of different fibre materials and quantities on high temperature strength and explosive spalling of UHPC concrete
Author(s): M. Saravanja, W. Klingsch, S. Anders
Pages: 271 - 279

Permeability of high strength concrete with different fibers at high temperature
Author(s): Mitsuo Ozawa, Dantas Rafael Lustoza, Hiroaki Morimoto and Takayuki Fumoto
Pages: 281 - 288

The mode of action of polypropylene fibres in high performance concrete at high temperatures
Author(s): K. Pistol, F. Weise, B. Meng and U. Schneider
Pages: 289 - 296

The use of PP fibers in tunnel construction to avoid explosive concrete spalling in case of fire. New test results for the clarification of the mode of action
Author(s): Ingo Knack
Pages: 297 - 307

Chapter 5 - Testing spalling / Testing methods / Special applications / Characterization


Fire tests of loaded beams
Author(s): R. Jansson and L. Boström
Pages: 311 - 318

Explosive spalling behavior of restrained concrete in the event of fire
Author(s): Toru Tanibe, Mitsuo Ozawa, Dantas Rafael Lustoza, Kouetsu Kikuchi, Hiroaki Morimoto
Pages: 319 - 326

Concrete spalling due to fire exposure and the influence of polypropylene fibres on microcracking
Author(s): S. Huismann, M. Korzen, F. Weise and B. Meng
Pages: 327 - 336

Assessment of fire exposed concrete with full-field strain determination
Author(s): J. Albrektsson, M. Flansbjer, J E. Lindqvist and R. Jansson
Pages: 337 - 344

Experimental analysis on changes of the porosity of ultrahigh performance concrete at elevated temperatures
Author(s): E. Klingsch, A. Frangi
Pages: 345 - 352

Fire spalling of concrete, as studied by NMR
Author(s): G.H.A. van der Heijden, L. Pel and O.C.G. Adan
Pages: 353 - 360

A simulation model for microstructure of portland cement paste at high temperature
Author(s): Qi Zhang, G. Ye, E.A.B. Koenders
Pages: 361 - 368

A proposal for an experimental set-up to investigate fire-induced corner damage in r/c members
Author(s): P. Bamonte, P.G. Gambarova, A. Maggioni and F. Lo Monte
Pages: 369 - 376

Influence of curing conditions on spalling behaviour of reactive powder concretes
Author(s): I. Hager and T. Zdeb
Pages: 377 - 383

Mobile furnace for determining spalling sensitivity of existing concrete tunnel linings
Author(s): M. Vermeer, B. Pieters and A. Breunese
Pages: 385 - 392

Avoiding spalling of precast HPC & UHPC elements by using a novel layered concept
Author(s): M.C. Alonso, O. Rio, C. Rodríguez and V.D. Nguyen
Pages: 393 - 400

Deformation and thermal characteristics of concrete throughout the fire burning and decay phases
Author(s): E.A. Jensen and M. Joshi
Pages: 401 - 410

Influence of cement type and aggregate shape on explosive concrete spalling
Author(s): J. Kirnbauer and U. Schneider
Pages: 411 - 418

Reinforced concrete slabs strengthened with textile reinforced concrete subjected to fire
Author(s): D. Ehlig and S. Hothan
Pages: 419 - 426

Swedish recommendations for preventing fire spalling in concrete structures for civil engineering purposes
Author(s): J. Silfwerbrand
Pages: 427 - 433