This volume contains a collection of peer-reviewed papers addressing durability and integrity of high-performance, high-strength and mass concrete by predicting and preventing the cracking due to thermal stresses and shrinkage at the early age.
Preface Material properties and hydration models: Material properties
influencing early cracking of concrete; Determination of initial degree of
hydration by means of ultrasonic measurements; Thermal expansion coefficient
of concrete at very early ages; Influence of curing temperature on mechanical
properties and evaluation of the equivalent age; Modelling hydration and risk
of early age thermal cracking of concrete; Unified solidification model of
hardening concrete composite; Mathematical models for degree of hydration,
moisture and temperature distributions in early age concrete : Mathematical
model for hydration of cement and formation of the cement microstructure.
Thermal stress measurement and analysis: Strain localization in transient
concrete state and potential crack location; Numerical simulation of
temperature and stress development in high-strength concrete Columns. Strain
localization in transient concrete state and potential crack location;
Numerical simulation of temperature and stress development in high-strength
concrete Columns; Development of a new device for measuring thermal stresses;
Measurement and analysis of thermal stresses in massive concrete block
foundation; Realistic analysis of thermal and shrinkage stresses in concrete
structures at early ages; Influence of environmental parameters on thermal
stresses; Evaluation of mass concrete practice by using
Compensation-Plane-Point Method; Experimental estimation of thermal cracking
using the modified temperature-stress testing machine. Shrinkage and creep:
Autogenous shrinkage: present understanding and future research needs;
Restraint stress due to autogenous shrinkage and drying shrinkage in
high-strength Concrete; Evaluation of autogenous shrinkage of concrete based
on mechanical properties of the cement paste matrix; Deformation and stress
in high-strength concrete due to autogenous shrinkage and thermal expansion;
Autogenous shrinkage of cementitious materials at early ages; Early age
shrinkage properties of highly strengthened aerated lightweight concrete
including waste glass aggregates; Drying shrinkage cracking of concrete kept
under dry air conditions from early age; Numerical simulation model for
drying shrinkage and cracking of early age concrete; Influence of elevated
temperature on creep and relaxation of early age concrete; Effective elastic
modulus for thermal stress analysis considering early age creep behavior;
Evaluation of creep of high-strength concrete at early ages; Mechanical
properties and creep behavior of high-strength concrete in early age;
Experimental research about early age creep of B65 and B85 concrete mixtures;
Restrained deformation of high-strength concrete using low-heat Portland
cement; Crack criteria for early age concrete: Experimental research on the
test methods for surface cracking of concrete; Effects of stress-strain
relationship and relaxation on restraint stress and crack formation in young
concrete members; Predicting cracks in hardening concrete using a
stress-based cracking criterion; Tensile behavior of early age concrete
measured by uniaxial tension test; Controlling technologies and practical
applications: Shrinkage reduced in high-performance concrete by internal
curing using pre-soaked lightweight aggregate; Crack resistant mechanism of
expansive concrete in early ages; Preliminary notions for predicting cracking
of expansive concrete based on its Mechanism; Experimental study on shrinkage
compensating high-fluidity concrete; Control of thermal cracking by pipe
cooling system in concrete structures; Experimental study on heat transfer
coefficient in convection flow of young concrete at pipe cooling; Crack
control for the massive concrete structures of the new central railway
station in Berlin, Germany; Development of a smart material to mitigate
thermal stress in early age concrete.
Hirozo Mihashi, Tohoku University, Japan. Folker H. Wittmann, ETH-Zürich, Switzerland.
