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Open Theses

In principle, final theses and project work are possible at the Chair of Building Materials Technology at almost any time. If you are interested, please contact the responsible staff member as soon as possible. Current announcements for theses can be found here:

Bachelor

Theses and Study projects

Master

Theses and Study projects


Current Theses

Bachelor

  • Current state of the technology and research on shotcrete
  • Water requirements and setting times of CEM I cements as influenced by temperature
  • Determination and prediction of the chlorine penetration depth in reinforced concrete components in existing buildings based on durability measurements

Master

 

  • Road concrete under the influence of high fresh concrete and hardening temperatures - Fresh concrete and processing properties
  • Influence of curing conditions on the acid resistance of concretes with different binders
  • Investigations on the cracking behavior of thin-layer carbon concrete as a joint superstructure in the rehabilitation of concrete roads
  • Freeze-thaw resistance and hygric properties of lightweight aggregate concrete for concrete noise barriers
  • Repair concept and 3D modelling of overhead line mast foundations (Project work - Chair of Statics and Dynamics)
  • Repair concept and design of a highway bridge (Project work - Chair of Solid Structures)
  • Repair concept and 3D modeling for a cooling tower (Project work - Chair of Statics and Dynamics)
  • Repair concept and design of a noise barrier (Project work - Chair of Steel Construction)

Completed Theses

Bachelor

  • Determination and prediction of the chloride penetration depth in reinforced concrete components in existing buildings based on durability measurements
  • Permanent bond between old and new concrete
  • Investigation of the bond behavior of applied concrete layers by the use of strip light projection
  • Use of cellulose fibers as an additive in concrete production
  • Maintenance measures and condition assessment of historic concrete structures
  • Test method for the appropriate determination of the roughness of concrete surfaces

Master

  • Investigation of bentonite suspensions with different densities "- Preliminary investigations on the subject: Extension of the application limits by means of conditioning agents in EPB tunnelling (Project work - Chair of Tunnelling, Pipeline Construction and Construction Operations)
  • Method for substrate pre-treatment during partial repair of concrete road pavements
  • Investigations on the correlation of chloride migration resistance and specific electrolyte resistance of concrete

Bachelor

  • Evaluation procedure for acid-exposed concrete
  • Frost and freeze-thaw resistance of concrete - fundamentals, influencing factors, state of research
  • Condition assessment and conservation measures of historical buildings made of natural stone
  • Durable bond between old and new concrete
  • Microcracking behavior of high-strength steel fiber reinforced concrete due to cyclic compressive swell loading

Master

  • Development of a test set-up for the simulation of the transformation of sin-gular joint deformations in concrete surfaces into plural cracks
  • Cooling measures of fresh concrete (Coop. FTB)
  • The influence of fresh concrete and curing temperature on the chloride migration of concrete
  • Microscopic investigations on the influence of carbon fibres on the microcrack behaviour in high-strength concrete
  • Investigations on the material behavior of compressible annular gap mortars for compressive rock masses
  • Durability of concrete according to the performance principle - condition assessment on buildings (Coop. VDZ)
  • Durability of concrete according to the performance principle - condition assessment of bridge structures (Coop. VDZ)
  • Investigations into the reproducibility of test methods for recording the tackiness of fresh concrete surfaces
  • Investigations into the unerring recording of rheological parameters with modified fresh concrete tests
  • Microscopic examination of steel fiber reinforced concrete due to cyclic compressive swell loading
  • Application of digital image analysis methods in microscopic examinations for the accurate detection of air voids in concrete samples (Project work - Chair of Computer Science in Civil Engineering)
  • Repair concept and rehabilitation of a concrete roadway (Project work - Chair of Traffic Planning)
  • Influence of steel and carbon fibres on the fatigue behaviour of high-strength concrete in the bending-swell range
  • Fresh concrete and workability properties of road concrete under the influence of high fresh concrete and hardening temperatures
  • Influence of the composition of lightweight concrete on damage-relevant material properties of noise barriers
  • Hardening behaviour and hardened concrete properties of road concrete under the influence of high fresh concrete and hardening temperatures
  • Microscopic investigation of steel fiber reinforced concrete due to cyclic pressure swell loading
  • Application of methods of digital image analysis in microscopic examinations for the accurate detection of air voids in concrete samples (Project work - Chair of Computer Science in Civil Engineering)

Bachelor

  • Effects of increased fresh concrete temperatures on fresh and hardened concrete properties
  • Vibrated concrete - mix stability
  • Self-compacting concrete - mix stability

Master

  • Influence of the decisive concrete engineering parameters on the stickiness of concretes
  • Alternative curing of tunnel liners under practical climatic conditions
  • Investigation of the shrinkage behavior and flexural strength of subsequently applied plastic fiber-modified concrete screed
  • Microscopic investigations on the influence of steel fibers on microcracking behavior in high-strength concrete
  • Alternative curing of tunnel liners under practical climatic conditions
  • Evaluation of rheological measurement data for the assessment of the properties of two-component mortars for annular gap grouting in mechanized tunneling (Project work - Chair of Tunneling, Pipeline Construction and Construction Operations)

Bachelor

  • Experimental studies on the interaction of swelling clay rock and deformable tunnel lining
  • Use of carbon nanotubes in cementitious binder systems
  • Durability of concrete - damage mechanisms and service life prediction of structural elements
  • Mixing stability of vibrated concrete
  • Mixing stability of self-compacting concrete
  • Effects of elevated fresh concrete temperatures on fresh and hardened concrete properties

Master

  • Fatigue behavior of high-strength cement paste under cyclic loading in the compressive swell range
  • Fatigue behavior of high-strength cement paste with and without carbon short fibers under cyclic loading in the tensile swell range
  • Fatigue behavior of high-strength concrete with and without steel short fibers under cyclic loading in the tensile swell range
  • Systematic investigations on the stressability of hot and cold workable jointing compounds in concrete pavements
  • Assessment of the sedimentation stability of fresh concrete - influence of the state of compaction
  • Strategies to avoid color irregularities on fair-faced concrete surfaces
  • Cement-reduced concretes - development of a concrete formulation with a greatly reduced cement content to below the standard limits with the aim of reducing CO2 in concrete
  • Boundary conditions for the production of mortars with plastic consistencies using resource-efficient cements
  • Assessment of the sedimentation stability of fresh concrete - Development of a coarse-grain screen
  • Development and experimental investigation of optimized segmental systems (Cooperation: Chair of Solid Construction, Ruhr University Bochum)
  • Durability of concrete according to the performance principle - influence of w/c-value variations on the parameters chloride penetration and carbonation resistance (Cooperation: VDZ)

Bachelor

  • State of the art of compressible cementitious systems and their initial components
  • Effects of elevated fresh concrete temperatures on fresh and hardened concrete properties
  • Rehabilitation of concrete traffic surfaces in the USA and Europe - state of the art and new developments
  • Fatigue behavior of (ultra-)high-strength concretes - effects of test-related influencing factors

Master

  • Metrological and computational methods for determining the heat of hydration of cement pastes, mortars and concretes
  • Fatigue behavior of high-strength mortars under cyclic loading in the pressure threshold range
  • Effect of curing and concrete surface properties on the penetration behavior of liquid media

Bachelor

  • Influence of steel fibers on the flexural strength and fatigue behavior of high-strength concretes
  • Process for the preparation of finely divided crushed sand for use in concrete construction
  • Jointless repair of concrete pavements with carbon concrete - Cyclic loading in laboratory tests
  • Bridging of cracks and joints using textile-reinforced repair layers
  • Influence of finely divided crushed sand on the rheological properties of mortars
  • Robustness of fresh concrete - effects of unplanned variations on concrete quality

Master

  • Development of a concept for emplacement tests in the Emscher sewer and creation of a monitoring system
  • Fatigue behavior of high-strength concrete under cyclic loading in the tensile swell range
  • Influence of compaction on the fresh and hardened concrete properties of very soft to flowable concretes
  • Investigation of the compression behavior of lightweight concrete
  • Assessment of the sedimentation stability of fresh concrete - Development of a coarse-grained scanner
  • Use of steel fiber shotcrete in tunnel construction: national and international regulations for testing and dimensioning
  • Influence of the properties of ASR test cements on the results of the rapid test procedure

Bachelor

  • Degradation processes in high-strength concretes as a result of floating stresses
  • Effect of different boundary conditions during acid attack on concrete
  • Influence of microstructure on the transport behavior of liquid media in concrete
  • Composite behavior of macro- and microfibers in a cementitious matrix
  • Jointless repair of concrete pavements with carbon concrete - reflection cracking, shrinkage deformation and stress development
  • Jointless repair of concrete pavements with carbon concrete - Bond behavior of old and new concrete
  • Robustness of fresh concrete - Effects of unplanned variations on concrete quality

Master

  • Assessment of the sedimentation stability of fresh concrete
  • Jointless repair of concrete pavements with carbon concrete - Transfer of in-situ boundary conditions to test specimens
  • Influence of steel fibers on the fatigue behavior of high-strength concrete
  • Load-bearing and composite behavior of carbon reinforced concrete specimens in double-sided textile pull-out tests
  • Concrete elements with micro-reinforcement under partial area loading
  • Development of a binder system for the production of a robust ultra-high performance concrete

Bachelor

  • Bond properties of textile reinforcements in concrete
  • Influence of aggregate size on the degree of hydration of cement mortars
  • Influence of granulometry and w/c ratio on the properties of cement mortars
  • Use of fine recycled aggregate as main cement constituent
  • Durability of high-strength and ultra-high-strength concretes
  • Influence of the chemical composition and granulometry of blastfurnace slags on the strength development of concretes containing blastfurnace slags
  • Investigation of existing methods for the determination of pore size and pore size distribution of non-cohesive unconsolidated aggregates
  • Workability and stability of fresh concrete - Test methods for the evaluation of special fresh concrete properties
  • Technical design of annular gap grouting of two-component mortars taking into account material-specific and constructional factors

Master

  • Joints in concrete pavements - stressing of hot and cold applied jointing compounds
  • Influence of the fines content and the addition of admixtures on the pumpability and sedimentation stability of long-time retarded sprayed concretes
  • Development of a test setup for the simulation of the grouting process of two-component mortars under practical boundary conditions
  • Influence of different test boundary conditions on the evaluation of acid resistance based on sulfuric acid attack on slag-containing mortar
  • Effect of rolling over traffic on the pressure development in the concrete structure
  • Influence of fresh material temperature on the properties of cementitious grouted concrete and grout

Bachelor

  • Technical execution of annular gap grouting of two-component mortars taking into account material-specific and constructional factors
  • Robust concretes - influences of modern superplasticizers as well as fines properties
  • Crack width limitation of textile-reinforced concrete components
  • Acid resistance of concrete when using cements containing blastfurnace slag and blastfurnace slag as additives
  • Strength development of two-component mortars by alkaline activation of blastfurnace slags
  • Steel corrosion and repair concepts using the example of the Henrichshütte steel mill in Hattingen, Germany
  • Strength development of two-component mortars by addition of additives with physical effects - Superabsorbent polymers
  • Service life prediction of concrete components - Durability and remaining service life

Master

  • Stiffness development of two-component mortar for annular gap grouting in mechanized shield driving
  • Influences of concrete and production technology parameters on the load-bearing and bond behavior of hybrid concrete elements
  • Capillary pressures in hardened concrete due to external influences
  • Finishing of industrial floors - influence of the moisture condition and the time of smoothing on the finish of the concrete surface
  • Lining of drinking water reservoirs - influence of finishing and curing of a concrete replacement on resistance to water penetration
  • Joints in concrete pavements - stressing of hot workable joint compounds
  • Investigations into the load-bearing and bond behavior of hybrid concrete elements under shear stresses
  • Alkali-silica reaction in concrete - damage development as a function of aggregate grain size
  • Strength development of a two-component mortar for annular gap grouting in mechanized shield driving as a function of the composition of the activating component B

Bachelor

  • Behavior of fresh concrete during concreting of drilled piles in non-cohesive soil
  • Influence of modified grading curves on the fresh and hardened concrete properties of special concretes
  • Joints in concrete pavements - Parameters influencing the joint movement of concrete pavements
  • High-strength and ultra-high-strength concretes - Granulometry and composition of composite binders
  • Comparison of different methods for determining the surface roughness of concrete and methods for surface treatment of concrete
  • Alkali-silica reaction in concrete - Differentiated consideration of the influence of the total alkali content without and with external alkali supply
  • Strength development of a two-component mortar for annular gap grouting under variation of the amount and time of addition of component B (accelerator)
  • Influence of different cement-bentonite combinations on the workability of component A of two-component mortars for annular gap grouting
  • Degradation processes in concrete components as a result of cyclic load effects
  • Two-component mortar for annular gap grouting in mechanized shield tunneling
  • Influence of different bentonites on the workability of the binder-containing component of two-component mortars for annular gap grouting
  • Influence of different concrete retarders on the workability time of the binder-containing component of two-component mortars for annular gap grouting
  • Joints in concrete pavements - stressing of hot-applied jointing compounds
  • Joints in concrete pavements - Parameters influencing the joint movement of concrete pavement slabs

Master

  • Influence of pre-storage conditions on the freeze-thaw resistance of concretes with slag-containing cements
  • Ultrasonic transit times in concrete components as a function of degradation and moisture state
  • Practical evaluation methods for the rheological properties of fresh concrete, in particular with regard to appropriate surface treatment
  • Drainage and infiltration behavior of annular gap mortars as a function of the permeability of the soil in saturated condition
  • Experimental development of measurement techniques for the detection of capillary pressures in hardened concrete as a result of swaging

Bachelor

  • Influence of the packing density of grading curves on the properties of a fresh concrete
  • Capillary penetration of liquid and salts in road concrete
  • Sensitivity of fresh and hardened mortar properties of annular gap mortars to variations in water content
  • Investigations into the production of bored piles from erosion-resistant drainage concrete
  • Influence of the fineness of fly ash and the mineralogical composition of bentonite on the drainage behavior of annular gap mortars
  • Factors influencing the flexural strength of concrete beams
  • Protective measures for structures in concrete-aggressive groundwaters
  • Development of a test method for assessing skin formation on fresh concrete
  • Investigations into the load-bearing capacity of steel fiber concrete with fiber cocktails under extremely eccentric partial area loading

 

Master

  • Investigations into the influence of additives on the workability of grouting mortars
  • Application of a SWB concrete in the sliding and climbing/sliding formwork method in the Emscher sewer construction section 30 project
  • Practical evaluation methods for rheological properties of fresh concrete
  • Workability of drain concrete for use in bored piles
  • Determination of the necessary glue content of an open-pored concrete as a function of the grading curve for the creation of a near-surface void system
  • Investigation of the influence of specimen dimensions on the load-bearing behavior of concrete under centric partial area loading
  • Determination of the bond behavior between old and new concretes under consideration of joint pretreatment
  • Influence of limestone fineness on fresh and hardened mortar properties
  • Rearrangement of fines in the mortar as a result of its dewatering in the annular gap
  • Load-bearing and fracture behavior of steel fiber reinforced concrete under shear loads
  • Investigation of the structural and mechanical properties of an open-pored road concrete COPS) with the addition of plastic dispersion

Bachelor

  • Reinforced concrete traffic surfaces - experiences abroad and current developments in Germany
  • Development of a laser scanning method to determine the void content and surface texture of porous road concrete (COPS)
  • Influence of pre-storage conditions on the freeze-thaw resistance of concretes with slag-containing cements
  • Investigation of the simultaneous use of polycarboxylate ether and naphthalene sulfonate in self-compacting concrete
  • Determination of slump flow of self-compacting (fine) concrete with different test methods
  • Investigation of the load-bearing behavior of steel fiber concrete made of fiber cocktails with two fiber types under centric partial area loads
  • Causes of secondary ettringite formation - chemical processes and their effects on the concrete structure
  • Assessment of an alkali-silica reaction: comparison of national and international test methods
  • Investigation of durability properties of road concretes using TiO2 nanoparticles
  • Influence of fiber orientation in concrete on the bearing and fracture behavior of steel fiber reinforced concrete under centric partial area loads
  • Investigation of the bearing capacity of concrete under eccentric partial area loading

Master

  • Influence of temperature and superplasticizers on the rheological properties of cement suspensions
  • Load-bearing behavior of steel fiber concrete made from fiber cocktails with three fiber types under partial area loads
  • Development of shear strength using a frame shear tester on dehydrated mortar formulations for annular gap grouting

Diplom

  • Uniformity of concretes
  • Effect of superabsorbents on the properties of fresh and hardened mortars including transfer of results to self-compacting concrete in road construction

Bachelor

  • Investigation of the void content of an open-pored road concrete by varying the glue content
  • Influence of paving thickness on strength development or durability of cementitious grouted concrete
  • Influence of steel fiber content on the bearing capacity of concrete under centric partial area loading at different loading surfaces
  • Evaluation of the drainage behavior of cementitious and cementless RSM when admixtures are used
  • Comparison of different repair systems for the production of an expedient exposed aggregate concrete structure for pavements
  • Optimization of mortar composition of annular gap mortars with regard to workability and strength development - Part I
  • Development of an early high-strength repair concrete for road construction using hardening accelerators
  • Acid-resistant concrete for wastewater treatment plants - Influences on durability due to microbially induced sulfuric acid corrosion
  • Non-destructive determination of structural damage in concrete using ultrasonic measurements
  • Determination of the shear strength of dewatered annular gap mortars

Diplom

  • Use of plastic admixtures in concrete for wastewater treatment plants
  • Strength development of annular gap mortars as a result of dewatering
  • Influence of steel fiber types on the load-bearing behavior of concrete under centric partial area loading

Bachelor

  • Fire protection of tunnel liners - concrete technology measures and fire protection linings
  • Investigations on mechanical properties of concrete when using fiber cocktails
  • Influences of different fiber types and fiber contents on the workability of steel fiber concrete
  • Development of early high-strength repair concretes for traffic areas in exposed aggregate construction using rapid-hardening concrete

Diplom

  • Fiber cocktail in concrete - influence on concrete properties and load-bearing behavior
  • Comparison of air content and air void characteristics in fresh and hardened concrete using different measurement methods
  • Minimum air void content for concrete road pavements in exposed aggregate design
  • Zoned construction method for vertical massive components in hydraulic engineering using precast elements
  • Determination of the relevant fresh and hardened mortar properties of annular gap mortars as a function of the granulometry of the fines
  • Causes and effects of structural damage on the long-term behavior of concrete pavements

Bachelor

  • Application of open-pored concrete pavements for the reduction of rolling noise in concrete traffic surfaces
  •  Influence of metrological and material-specific parameters in rheological investigations

Diplom

  • Drainage behavior of mortars for annular gap grouting
  • Zoned construction method for vertical massive components in hydraulic engineering using the "fresh-in-fresh" construction method
  • Solution processes during acid-sulfate attack on concrete

Diplom

  • Galvanized steel fibers in concrete - influence on concrete structure and bond behavior due to hydrogen formation

Diplom

  • Photocatalytic reaction of titanium dioxide in concrete
  • Influence of different aggregates on the fatigue behavior of concrete due to cyclic compressive loading
  • Evaluation of the effectiveness of a chemical surface hardening on the surface quality of industrial floors
  • Verification of the practicability of a measuring method for determining fiber content and fiber orientation in fresh and hardened concrete
  • Influence of different concrete admixtures on the thixotropy and green strength of fresh concrete
  • Influence of different concrete admixtures and materials on the thixotropy of cement paste and mortar
  • Microscopic investigation of the crack condition of bridge concrete after 50 years of use

 

Diplom

  • Fine mortar for injection concretes - design, properties and testing
  • Catalog of measures for the maintenance and rehabilitation of concrete and masonry sewage manholes
  • Test methods for assessing the workability of grouting mortar and grouting concrete

Diplom

  • Fine mortar for injection concretes - design, properties and testing
  • Catalog of measures for the maintenance and rehabilitation of concrete and masonry sewage manholes
  • Test methods for assessing the workability of grouting mortar and grouting concrete

Diplom

  • Possibilities for the repair of exposed aggregate concrete facades
  • Investigations on the long-term behavior of concrete repair systems under free weathering conditions
  • Effects of pyrite oxidation on concrete components in the substrate

Diplom

  • Laser-based investigations of shrinkage and swelling deformations of cements commonly used in the construction industry

Diplom

  • Relationship between mortar and lightweight concrete strength with combined grain and matrix porosity

Diplom

  • Investigations into the required stripping strength of concrete components
  • Electromagnetic treatment of raw materials for concrete production
  • Pre-expanded air as an additional concrete component for the production of structural lightweight concrete and high-strength lightweight concrete
  • Quantification of frost damage of concrete based on selected mechanical parameters
  • Robust concretes - sensitivity to changes in composition, processing and curing
  • Freezing behavior and structural change of high-strength cement blocks due to temperature and moisture change
  • Mechanical properties of high-strength cement blocks and high-strength fine sand mortar as a result of moisture change

Diplom

  • Influence of fly ash content and water-binder value on the strength development of "robust concretes
  • Application possibilities and limits of pre-expanded air voids in concrete construction
  • Correlation between temperature behavior and early strength in high-performance concretes containing fly ash and microsilica
  • Mortar configuration and hardened concrete properties of mortared concrete chippings compared to conventional chippings concretes
  • Pre-expanded air voids in concrete construction as a replacement for conventional LP agents
  • Effectiveness and application possibilities of new types of superplasticizers for high-performance concretes
  • Development of a test method for the calibration of anode conductors for the moisture determination of high-performance concretes