Browsing Ústav technologie stavebních hmot a dílců by Title
Now showing items 1-20 of 92
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Abrasive Wear Resistance of Concrete in Connection with the Use of Crushed and Mined Aggregate, Active and Non-Active Mineral Additives, and the Use of Fibers in Concrete
(MDPI, 2020-11-27)Virtually every concrete structure comes into contact with abrasive effects of flowing media or solids, which have a direct impact on the durability of concrete. An abrasive effect is most pronounced in transport or water ... -
Alternative Evaluation of the grindability of Pozzolanic Materials for Cement Production
(IOP Publishing, 2017-10-25)All conventional methods for the evaluation of grindability require a specific grinding instrument. These grinding instruments do not have any other practical use and thus are not very common. This paper focuses on the ... -
Alternative technology of constructing masonry structures designed for areas with increased seismic activity
(Elsevier, 2016-07-21)The Czech Republic is a country which generally sees low seismic activity; however, this activity needs to be taken into account in ca 50 % of the country’s area with 10 districts being considered as having seismic activity ... -
An Analysis of Crystalline Admixtures in Terms of Their Influence on the Resistance of Cementitious Composites to Aggressive Environments
(Budapest University of Technology and Economics, 2021-01-01)This paper describes the influence of crystalline admixtures on the chemical resistance of cement composites exposed to aggressive environments. The effect of the crystalline admixtures was determined by a series of ... -
Analysis of Inner Structure Changes of Concretes Exposed to High Temperatures using Micro X-ray Computed Tomography
(IRSM AS CR, 2015-03-02)The X-ray Computed Tomography (X-ray CT) represents a progressive non-destructive method of analysing the inner structure of materials. The method was used for monitoring changes in inner structure of concrete samples of ... -
The Behavior of Cement-Bonded Particleboard with Modified Composition under Static Load Stress
(MDPI, 2021-11-10)This article presents research on the behavior of cement-bonded particleboards under mechanical stress caused by the static load. The composition of the boards was modified using al-ternative raw materials–dust (DU) forming ... -
Behaviour of cement composites with lightweight and heavyweight aggregates at high temperatures
(Budapest University of Technology and Economics, 2017-03-24)This paper presents new results of the research of the influence of individual input components done on the behaviour of cement based composite materials exposed to high temperatures. A new approach of this research lies ... -
Carbon Nanotubes in Cementitious Composites: Dispersion, Implementation, and Influence on Mechanical Characteristics
(Hindawi, 2016-06-14)In article were descibed possibilities of CNT's dipersion. Implementation CNT to the cements matrix and it's influence to the mechanical properties -
Chemical Stability of Innovative Grouts for Cast Basalt Elements
(IOP Publishing, 2021-01-18)Newly developed tile grouts are intended mainly for environment with strong chemical loading. For this reason, chemical resistance was one of the key parameters observed. The grout for cast basalt tile was polymer based, ... -
Chemically resistant polymeric jointing grout with environmental impact
(Elsevier, 2021-07-19)This paper deals with the study of the chemical resistance of polymeric jointing grouts intended for thejointing of elements that are permanently stressed by an aggressive chemical environment, such as ele-ments made of ... -
Comparison of mechanical properties of geopolymers from different raw materials with the addition of waste glass
(Technická universita Košice, 2021-09-20)The combustion of fossil fuels results in creating a lot of solid wastes such as fly ash and slag. However, these environmentally unfriendly materials can be used as a raw material for alkali activation – geopolymerization. ... -
Composite Binder Containing Industrial By-Products (FCCCw and PSw) and Nano SiO2
(MDPI, 2021-03-25)This article analyzes the integrated effect of industrial by-products (spent uidized bed catalytic cracking catalyst waste (FCCCw) and paper sludge waste (PSw) generated in paper manufacturing) combined with nano-SiO2 (NS) ... -
Composites Based on Alternative Raw Materials at High Temperature Conditions
(Budapest University of Technology and Economics, 2017-10-24)This paper presents newly developed polymer-cement composites. The primary binder (cement) was partially substituted by use of blast-furnace slag and high-temperature fly ash. A lightweight aggregate – agloporite (grain ... -
Conversion of silica by-product into zeolites by thermo-sonochemical treatment
(Elsevier, 2021-04-13)The fine powdered silica by-product of processing of aluminum fluoride (fertilizer plant, Lithuania) was used for zeolite synthesis as silica and aluminum source. The effect of sonication time and the time of hydrothermal ... -
Design and verification of properties of heavy-weight concrete for the production of weights
(IOP Publishing, 2020-05-18)The paper deals with the design of composition and verification of the properties of heavy-weight concrete for the production of weights. Heavy weights from fine-grained heavy-weight concrete can be used as a substitute ... -
Determine the Compressive Strength of Calcium Silicate Bricks by Combined Non-Destructive Method
(Hindawi, 2014-09-01)The paper deals with the application of combined non-destructive method for assessment of compressive strength of calcium silicate bricks. In this case it is a combination of the rebound hammer method and ultrasonic pulse ... -
Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test
(MDPI, 2021-08-25)Tristal steel is low-carbon construction-type steel widely used in the automotive industry, e.g., for braking components. Given the contemporary demands on the high-volume production of such components, these are typically ... -
Development and Properties of New Mullite Based Refractory Grog
(MDPI, 2021-02-07)The presented study is focused on optimization and characterization of a high-alumina refractory aggregate based on natural raw materials—kaolins, claystone, and mullite dust by-product (used to increase the alumina and ... -
Development of Crystallinity of Triclinic Polymorph of Tricalcium Silicate
(MDPI, 2020-08-24)Tricalcium silicate phase is one of the main components of modern Portland cements. One of the major industrial challenges in the field of cement production is mapping the influence of individual clinker minerals and their ... -
Development of grout for additional seal embankment dams
(Elsevier, 2015-06-25)The technology of sealing sand and gravel by chemical injection has been known and used for a long time. Chemical grouting is however expensive and sometimes the use of cement does not lead to the desired effect. That is ...