Micromechanics of Cement-Based Composites

Garant předmětu:

Lecturer:

Tutor:

Supervisor:

Department of Mechanics

Synopsis:

Cement composites form the basis of today's civilization and construction industry; traditional concrete is now the most produced material in the world with an average consumption of over 1 m3 / person / year. The properties of these composites can be changed in a wide range according to needs - compressive strength up to 800 MPa, creep, shrinkage, resistance to environmental influences or the formation of cracks. The subject presents a multi-scale description of these cement composites, from the atomic level to the building structure level. It includes an overview of experimental methods used to identify properties, analytical and numerical methods for modeling hydration, heat transfer, elasticity, creep and strength across different levels of resolution. The subject is supplemented by a whole range of engineering applications on which these methods have been successfully used - designs and optimization of massive concrete structures (arches with cooling, foundation blocks, guide faces of dams), cement concrete highway covers with extended durability, sprayed concrete with replacement of Portland cement with calcium sulphide binders, innovative crack-resistant materials, alkali-activated fly ash. Most of the used numerical models have been implemented in the open-source software OOFEM, which you can freely use, for example, for your prediction of temperatures during hydration, stress and crack analysis including the influence of reinforcement and boundary conditions.

Requirements:

Basic knowledge of inorganic chemistry and continuum mechanics.

Syllabus of lectures:

According to the content of the subject.

Syllabus of tutorials:

According to the content of the subject.

Study Objective:

The aim is to understand the behavior of cementitious materials on the lower scales that determine the macro-scale properties. A whole range of experimental, analytical and numerical methods can be used for this.

Study materials:

V. Šmilauer: Multiscale hierarchical modeling of hydrating concrete, Saxe-Coburg Publications, 2015

R. Bárta: Chemie a technologie cementu, AVČR, 1961

A. Neville: Properties of concrete, 2011

R. W. Burrows: The visible and invisible cracking of concrete, ACI, 1998

H. F. W. Taylor: Cement chemistry, ThomasTelford, 1997

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Stavební inženýrství, obor Konstrukce a dopravní stavby (compulsory elective course)
• obor Konstrukce a dopravní stavby, zaměření Inženýrské konstrukce (compulsory elective course)
• obor Konstrukce a dopravní stavby, zaměření Dopravní stavby (compulsory elective course)
• Stavební Inženýrství - konstrukce a dopravní stavby, specializace Inženýrské konstrukce (compulsory elective course)
• Stavební Inženýrství - konstrukce a dopravní stavby, specializace Dopravní stavby a geotechnika (compulsory elective course)