Browsing Ústav chemie by Title
Now showing items 17-36 of 37
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Fracture parameters of alkali-activated aluminosilicate composites with ceramic precursor: durability aspects
(Elsevier, 2021-11-20)Four sets of alkali-activated aluminosilicate (AAAS) composites based on ceramic precursors were studied in terms of their characterization by mechanical fracture parameters as a basis for considerations of durability. ... -
Fracture parameters of fly ash geopolymer mortars with carbon black and graphite filler
(IOP Publishing, 2021-11-23)In this study, the effect of carbon black and graphite filler on the crack initiation and fracture parameters of fly ash geopolymer mortar is investigated. The carbon black was added in the amount of 0.5 and 1.0% and ... -
Fracture response of alkali-activated slag mortars reinforced by carbon fibres
(IOP Publishing, 2018-07-12)The paper reports a study of the effect of carbon fibres on the mechanical fracture parameters of alkali-activated slag mortars. The carbon fibres were added in the amount of 1, 2 and 3%, respectively with respect to the ... -
Fresh state properties of lime mortars with foam glass dust
(IOP Publishing, 2020-06-08)Fine glass waste has been found to be a suitable addition to lime mortars because of the high amorphous content. The behavior of fresh air lime mortars and natural hydraulic lime mortars modified by foam glass dust is ... -
How Reliable is the Durability of RC Structures?
(Czech Technical University in Prague, 2004-12-01)The goal of this paper is to show some trends and time profiles of the reliability index relevant to the Serviceability Limit State considering the design service life of RC structures. -
Hygric and mechanical parameters of ternary binder based plasters lightweighted by expanded perlite
(IOP Publishing, 2018-07-12)This article is focused on modern plasters with improved thermal insulating ability. The studied plasters were composed of lime, cement, ceramic powder, expanded perlite and silica sand. Regarding the matrix, three kinds ... -
Immobilization of Heavy Metals in Natural Zeolite-blended Cement Pastes
(Elsevier, 2016-09-26)This paper deals with the investigation of efficiency of natural zeolite-blended cement pastes for the immobilization of heavy metals. Natural zeolite was used to partially replace ordinary Portland cement (OPC) at rates ... -
Impedance spectroscopy measurement of metakaolin-based alkali-activated building materials
(IOP Publishing, 2020-12-18)Cement-containing as well as cement-free building materials are regarded as dielectrics. Therefore, electrically conducting admixtures are to be added to them in order to increase their electrical conductivity. Steel or ... -
Methodology for the quantification of concrete sustainability
(EDP Sciences, 2018-06-26)LCA is a method that evaluates the life cycle of a structure from the point of view of its impact on the environment. Consideration is given also to energy and raw material costs, as well as to environmental impact throughout ... -
Microstructure of biopolymer-modified aerial lime mortars
(EDP Sciences, 2020-10-14)Cellulose-based viscosity-modifying admixtures are used on daily basis in a wide range of building materials, dominantly in pre-mixed mortar systems. Lately, alternative admixtures such as different “gums” have emerged. ... -
Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites
(Italian Group of Fracture, 2017-07-03)In this paper, the attention is paid to investigation of the importance of the interfacial transition zone (ITZ) in selected fine-grained cement-based composites for the global fracture behaviour. This is a region of cement ... -
Mortars with Crushed Lava Granulate for Repair of Damp Historical Buildings
(MDPI, 2019-10-30)In this paper, crushed lava granulate was used as full silica sand replacement in composition of repair mortars based on hydrated lime, natural hydraulic lime, or cement-lime binder. Lava granules were analyzed by X-ray ... -
Optical performance of colored crystalline solar cells for building energy efficient application
(Elsevier, 2015-10-17)The optical properties of building materials belong to the features that are currently taken into account more frequently. There are various reasons for dealing with those parameters. Some of them aim to achieve specific ... -
Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activator
(IOP Publishing, 2018-07-12)The rheological behaviour and mechanical properties of alkali-activated materials prepared by activation of a brick powder by alkaline solution (alkali + water glass) is presented in this paper. The effect of quantity of ... -
Rheological and mechanical properties of lime-brick powder mortars with expanded clay aggregate
(IOP Publishing, 2018-07-16)The rheological behaviour and mechanical properties of lightweight lime-brick powder mortars with combined expanded clay-sand aggregates are presented in this paper. The rheological investigation included the characterization ... -
Rheological characteristics of aerial lime-based pastes with addition of biopolymers
(IOP Publishing, 2018-07-16)Viscosity enhancing admixtures are widely used to improve the properties of concrete and ready-mix mortars. This study focuses on the influence of biopolymer (sodium salt of alginic acid, carrageenan, diutan gum, gellan ... -
Rheology of natural hydraulic lime pastes modified by non-traditional biopolymeric admixtures
(SCIENTIFIC SOC SILICATE INDUSTRY-SZTE, 2019-11-29)Viscosity enhancing admixtures, widely used to improve characteristics of concrete and ready-mix mortars, are mainly different derivatives of cellulose. Due to the nature of cellulose processing, the environmental-friendlier ... -
Salt and Ice Crystallization Resistance of Lime Mortars with Natural Lightweight Aggregate
(Scipedia, 2020-09-25)In this study, the comparison of lava sand, pumice, and natural zeolite as lightweight aggregate in air lime mortars, natural hydraulic lime mortars, and cement-lime mortars has been investigated with emphasis on the ... -
Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression
(MDPI, 2021-08-04)The development of smart materials is a basic prerequisite for the development of new tech-nologies enabling the continuous non-destructive diagnostic analysis of building structures. Within this framework, the piezoresistive ... -
Ternary binder based plasters with improved thermal insulating ability
(IOP Publishing, 2017-10-25)New kind of plasters with improved thermal insulating ability are presented in this article. Improvement was reached by utilization of lightweight expanded perlite with high porosity. The second used aggregate was silica ...