Evaluation of some Specific Effects of Pavement Kerbs Containing Cement Kiln Dust on Soil and Lawns - The First Experimental Phase

2020 ◽  
Vol 838 ◽  
pp. 23-30
Author(s):  
Lukáš Procházka ◽  
Barbara Vojvodíková

This article deals with the evaluation of the effects on soil caused by leaching of materials from curbs, which were made using cement kinl dust from the cement plant Horné Srnie. Attention is also paid to a condition of the grass growing near the curbs. These laboratory curbs (bricks) were produced with addition of cement kiln dust and fly ash after denitrification by the SNCR method in alkaline activated materials based on blast furnace slag granules activated by anhydrous disodium metasilicate During the experiment the effects of laboratory curbs on grass growth in testing flower pots were investigated. The aim of the experiment was to obtain a product suitable for curbs with supposed direct contact with the soil. The experiment dealt with the properties of laboratory curbs stored in situ as well as with their influence on the soil and the effect of leached substances on the surrounding grass. The main part of the experiment was conducted in situ.

2016 ◽  
Vol 9 ◽  
pp. S138-S143 ◽  
Author(s):  
A. Abdel Rahman ◽  
S.A. Abo-El-Enein ◽  
M. Aboul-Fetouh ◽  
Kh. Shehata

2016 ◽  
Vol 851 ◽  
pp. 45-50 ◽  
Author(s):  
Vlastimil Bílek Jr. ◽  
Ladislav Pařízek ◽  
Petr Kosár ◽  
Jiří Kratochvíl ◽  
Lukáš Kalina

This study investigates the effect of different admixtures on strength and porosity development of mortars and pastes based on alkali activated blast furnace slag (AABFS). Fluidized bed combustion fly ash and by-pass cement kiln dust were used to replace slag in the binder by 5%wt. and 10%wt., respectively. Pure slag mortar was also modified by a shrinkage reducing admixture. The use of all the admixtures resulted in a reduction in early age strength, while only shrinkage reducing admixture had significant impact on pore size distribution. Properties of AABFS based specimens were compared to those of specimens based on ordinary Portland cement (OPC).


2018 ◽  
Vol 761 ◽  
pp. 23-26 ◽  
Author(s):  
Eva Štěpánková ◽  
Lukáš Kalina ◽  
Vlastimil Bílek Jr. ◽  
Eva Bartoníčková

This paper deals with the mechanical properties and phase study of alkali activated blast furnace slag and by-pass cement kiln dust mixture. The by-pass cement kiln dust (CKD) solves the problem with significant shrinkage of alkali activated materials which is considerably limiting their practical applications. The mechanism of action of CKD in alkali activated matrix has been investigated as well as its optimal dosage in the means of mechanical properties. The reaction products during the hydration process were characterized by X-ray powder diffraction.


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