Rostislav Šulc
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View article: Thermal stability of hydraulic non-cement binder prepared from FBC ash
Thermal stability of hydraulic non-cement binder prepared from FBC ash Open
The thermal stability of a non-cement sulfocalcic binder (SCB) prepared from FBC ash was studied at 80 °C, 200 °C and 600 °C for 90 days and compared with the thermal stability of OPC. All the test bodies produced from SCB pastes had been …
View article: Optimization Algorithm for Cutting Masonry with a Robotic Saw
Optimization Algorithm for Cutting Masonry with a Robotic Saw Open
The contribution of this study is in the novel application of the bin packing algorithm that is used to optimize the robotic bricklaying process with the aim of minimizing the wearing of a robotic saw used for splitting brick blocks so as …
View article: Physico-chemical properties of new clinker-free hydraulic binder from metakaolin, anhydrite II and lime
Physico-chemical properties of new clinker-free hydraulic binder from metakaolin, anhydrite II and lime Open
This paper deals with a new clinker-free hydraulic binder (3C), the synthesis of which was inspired by FBC ash with hydraulic properties based on the principle of lime-sulfate activation of metakaolin. The influence of the composition on t…
View article: Use of confocal microscopy to measure the porosity of cement containing sulfocalcic binder: A comparative study
Use of confocal microscopy to measure the porosity of cement containing sulfocalcic binder: A comparative study Open
This work proposes an effective methodology for measuring the porosity of mixed hydraulic binders applying image analysis (IA) with confocal microscopy (CM). CM offers a certain simplification of sample preparation compared to the standard…
View article: Pozzolanic activity of stockpile ash: Comparison of test methods
Pozzolanic activity of stockpile ash: Comparison of test methods Open
The paper deals with the determination of the pozzolanic activity of coal-fired power plant fly and bottom ash deposited in stockpiles in the Czech Republic. The pozzolanic activity of the ash was determined using the Frattini test, modifi…
View article: Crack-Resistant Cements under Drying: Results from Ring Shrinkage Tests and Multi-Physical Modeling
Crack-Resistant Cements under Drying: Results from Ring Shrinkage Tests and Multi-Physical Modeling Open
Cementitious materials exhibit shrinkage strain on drying, leading easily to crack formation when internally or externally restrained. It is known that cements with a slow strength gain show higher crack resistance under external drying. T…
View article: A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash
A Study of Physicochemical Properties of Stockpile and Ponded Coal Ash Open
The article describes chemical and also selected physical properties of ponded high temperature fly ash (FA) and bottom ash (BA) from a Mělník lignite power plant located in the Czech Republic. The research was carried out on samples obtai…
View article: Shotcrete using ternary binder made from coal combustion products: from lab tests to an application
Shotcrete using ternary binder made from coal combustion products: from lab tests to an application Open
The paper presents a ternary binder development and its utilization in shotcrete. The binder is made from fluidized bed combustion (FBC) fly ash, siliceous fly ash, and Ca(OH) 2 addition, now available under the name Sorfix. XRD and TGA id…
View article: Digital Plan of Brickwork Layout for Robotic Bricklaying Technology
Digital Plan of Brickwork Layout for Robotic Bricklaying Technology Open
The trend of using modern technologies in the construction industry has been growing stronger recently, particularly in the fields of additive construction or robotic bricklaying. Therefore, specifically for the purpose of robotic bricklay…
View article: DEVELOPMENT OF PREFABRICATED COMPONENTS WITH MINIMIZED CEMENT CONTENT THROUGH THE USE OF FINE-GRAINED SECONDARY MATERIALS
DEVELOPMENT OF PREFABRICATED COMPONENTS WITH MINIMIZED CEMENT CONTENT THROUGH THE USE OF FINE-GRAINED SECONDARY MATERIALS Open
This paper describes the results and an example of the use of secondary materials in concrete for application to practice, which were obtained from a project in cooperation with the University CTU in Prague and company Hochtief CZ a.s.Exte…
View article: DURABILITY OF CONCRETE WITH BINDER BASED ON SULFOCALCIC FLY ASH
DURABILITY OF CONCRETE WITH BINDER BASED ON SULFOCALCIC FLY ASH Open
This paper deals with the durability of concrete with binder based on sulfocalcic fly ash. At the beginning, in the theoretical part, there is a research on the frost resistance of concrete, its resistance to chemical thaw substances and m…
View article: CHLORIDE RESISTANCE OF NANO-PARTICLE REPAIRED CONCRETE
CHLORIDE RESISTANCE OF NANO-PARTICLE REPAIRED CONCRETE Open
This paper describes the results of the experimentally modeled chloride ion penetration into different quality concrete structures with fully developed carbonation. Parts of concrete samples were further treated, to increase the resistance…
View article: Electrochemical injection of cathionic corrosion inhibitors
Electrochemical injection of cathionic corrosion inhibitors Open
Electrochemical chloride extraction from a reinforced concrete structure may be accompanied with an electrochemical injection of healing agents if such agents are positively charged and are able to migrate towards the activated reinforceme…