THE POSSIBILITY TO USE MODIFIED FLIGHT ASH AS A NEUTRALIZER IN THE ACID SOILS RECLAMATION PROCESSES
Journal Title: Civil and Environmental Engineering Reports - Year 2018, Vol 4, Issue 28
Abstract
Using the alkaline fly ash after combustion of lignite as the acid soils neutralizer is a technique known for decades. Due to many disadvantages of the direct fly ash application it is sought to modify this material prior to its use. The process of fly ash modification in the magnetic activator involved breaking up fly ash to small grain sizes in order to obtain a material with a very large specific surface and modified properties. The purpose of the research was to compare the properties of unmodified fly ash with those of ash modified in the magnetic activator in terms of its usefulness in the neutralization of acidic soils. Unmodified fly ash was classified as a medium-grained calciferous material. The basic components of ash were silicates (33.28% of SiO2) and calcium compounds (31.26% of CaO). It has a low heavy metal content falling within a range characteristic of coal ash and meeting soil quality standard requirements. As a result of activation, the following changes were obtained in the properties of modified ash compared with unmodified ash: sand fraction content – reduced to 0.40, silt fraction content – increased by 1.40, silt fraction content – increased by 1.68, content of the sum of the dust and silt fractions – increased by 1.49, specific surface – increased by 1.65, fineness – reduced by 0.48. Modification of fly ash in the magnetic activator was found to have improved the physical properties of ash as acidic soil neutralizer, and its chemical properties make such an application possible.<br/><br/>
Authors and Affiliations
Michał ĆWIĄKAŁA, Andrzej GREINERT, Jakub KOSTECKI, Leszek RAFALSKI
Keywords
Related Articles
- EP ID EP427066
- DOI 10.2478/ceer-2018-0053
- Views 84
- Downloads 0
Reliability of a building determined by the durability of its components
The conviction that the relation between the durability of elements and the methodology of renovation prediction is worth investigating results from the search of efficient methods of maintenance planning in buildings er...
The complexes of antibiotics with trace metals
This article, basing on the available literature, summarizes the results of physiochemical research into the structure of complexes of trace metals with antibiotics. It presents the leading methods of instrumental analys...
EVALUATION OF BIODEGRADABILITY OF WASTE BEFORE AND AFTER AEROBIC TREATMENT
An important advantage of use of an aerobic biostabilization of waste prior to its disposal is that it intensifies the decomposition of the organic fraction of waste into the form which is easily assimilable for methanog...
HYBRID BRIDGE STRUCTURES MADE OF FRP COMPOSITE AND CONCRETE
Despite many advantages over the conventional construction materials, the contemporary development of FRP composites in bridge engineering is limited due to high initial cost, low stiffness (in case of glass fibers) and...
STABILITY AND LOAD BEARING CAPACITY OF A BARS WITH BUILT UP CROSS SECTION AND ELASTIC SUPPORTS
The present paper is devoted to the numerical analysis and experimental tests of compressed bars with built–up cross section which are commonly used as a top chord of the roof trusses. The significant impact on carrying...