Laboratory of Solid Structures LSS

Research in the area of

Solid Structures

at the University of LuxembourgAss.-Prof. Dr.-Ing. Danièle Waldmann-Diederich

Reinforced and prestressed concrete structures

“Structures en béton armé et précontraint”

Research group: 2 PostDocs and 6 PhD students

Laboratory of Solid Structures LSS

Laboratory of Solid Structures

Strategy of Laboratory of Solid Structures

Visibility towards the “outside world”

Integration of UL into Luxembourg

Reference point for industry, engineering consultancies and administrations

Main research subjects

Smart buildings

Smart structures

Demountable structures

Circular economy

aligned with the strategy of the Institute of Civil and Environmental Engineering.

Laboratory of Solid Structures LSS

Research areas

New innovative concrete formulationSubstitution of cement and traditional aggregates by waste or renewable products aiming at a reduction of energy consumption reduction of consumption of natural resources and a reduction of CO2 production

Structural analysis of concrete structures

Analytical, numerical and experimental analysis of reinforced concrete or prestressed concrete

structures

Computational modelling for concrete

Multi-Physics Numerical Simulation of the chemical, mechanical and thermal material behaviour of concrete

Laboratory of Solid Structures LSS

New innovative concrete formulationSubstitution of cement and traditional aggregates by waste or renewable products aiming at a reduction of energy consumption reduction of consumption of natural resources and a reduction of CO2 production

Structural analysis of concrete structures

Analytical, numerical and experimental analysis of reinforced concrete or prestressed concrete

structures

Computational modelling for concrete

Multi-Physics Numerical Simulation of the chemical, mechanical and thermal material behaviour of concrete

Research areas

Laboratory of Solid Structures LSS

New innovative concrete formulation

Concrete based on supplementary cementitious materials

Laboratory of Solid Structures LSS

Recycling of gravel wash mud for CO2 reduced cementThapa & Waldmann (2016-2020)

Publication in TOP10 JournalAssessment of the suitability of gravel wash mud asraw material for the synthesis of an alkali-activated binder. Journal of Applied Clay Science 2018

Gravel Wash Mud GWMboue de lavage = résidu après lavage du sable et des graviers

Calcined GWM powder

Calcination at

750 to 950°C for 60 min

Gravel wash mud (GWM)

Boue de lavage

Dried GWM

Drying at 105°C

for 2 days

Fine & dried GWM

powder

Crushing into

fine powder

Recycling of gravel wash mud for CO2 reduced cementThapa & Waldmann (2016-2020)

Recycling of gravel wash mud for CO2 reduced cementThapa & Waldmann (2016-2020)

2nd Concept: Substitution of ordinary cement by calcined GWM powder

750°C

850°C

950°C

5 %

10 %

15 %

20 %

…

95 %

Dried at 105°C

↓

Grinding

↓

Fine GWM powder

7 days

28 days

56 days

90 days

Recycling of gravel wash mud for CO2 reduced cementThapa & Waldmann (2016-2020)

2nd Concept: Substitution of ordinary cement by calcined GWM powder

Co

mp

ress

ion

str

engt

h

Substitution rate

Scanning electron microscopeMicroscopie électronique à balayage