Mr Nqgondi Nxokwana, MSc(Geology), Physicochemical properties of South African shales in the context of geological CO 2 storage, 2020 Dr Grizelda du Toit, PhD(Chemistry), Chemical and mechanical activation of hybrid fly ash cement, 2018 Mr Dennis Moyo, MSc(Chemistry), Application of coal fly ash as filler in natural rubber
3 GLOSSARY Alkali activator – alkaline chemical, usually in solution, which reacts with a powdery aluminosilicate such as fly ash to produce a cement capable of making concrete Aluminosilicate – material with a high level of silica (SiO 2) and aluminium oxide (Al 2 O 3) Calcined Clay – clay that has been heated in a kiln to drive out volatile materials
the fly ash contained toxic heavy metals such as Arsenic (As), Antimony (Sb), Cadmium (Cd), Chromium (Cr) and Lead (Pb) (Ayanda et al, 2012) Trace metal enrichment has been observed in soils around various sites exposed to the deposition of fly ash and coal dust A few studies have been conducted in South and southern Africa
Modification of surface properties of South African coal fly ash for industrial filler applications Liezel van der Merwe1, Linda Prinsloo2, Richard Kruger3, Lethabo Mathebula1 1 Department of Chemistry, University of Pretoria, Pretoria, 0002, South Africa, e-mail: [email protected]
Affiliations 1 a Environmental and Nano Science Research Group , Department of Chemistry, University of the Western Cape , Bellville , Cape Town , South Africa; 2 b HySA Infrastructure Centre of Competence, Materials Science and Manufacturing, Council for Scientific and Industrial Research , Pretoria , South Africa; 3 c AV Topchiev Institute of Petrochemical Synthesis, Russian Academy of .
Aug 24, 2016· 1 Introduction South Africa relies mainly on coal combustion for power generation Low‐grade bituminous coal is combusted for power generation; this in turn generates huge volumes of waste materials such as bottom ash, fly ash, boiler slag, flue gas desulfurization sludge, and noncaptured particles [1, 2]Of most concern is fly ash, which is mainly collected from flue gases by ,
her PhD at the University of Pretoria, South Africa Her fields of interest include the utilisation of fly ash in alkali-activated non-Portland cement binders Contact details: Department of Civil Engineering University of Pretoria Pretoria 0002 South Africa T: +27 12 420 4179 F: +27 12 362 5218 E: [email protected]
Jul 07, 2015· Technikon Pretoria, South Africa Ravindra K Dhir x Ravindra K Dhir Search for articles by this author, Thomas D Dyer x , like fly ash, slag and phosphogypsum with small cement additions , Source: Advances in Cement Research, Volume 17, Issue 3, 1 Jul 2005 (113–119)
Jan 14, 2020· Zeolites synthesized from biomass waste materials offer a great opportunity in the sustainable utilization of the waste In this work, energy-efficient processes (ie microwave and ultrasound irradiation) were used to synthesize pure phase sodalite (zeolite) from coal fly ash obtained from a power plant in South AfricaThe pure-phase sodalite was obtained with a comparatively higher ,
Aug 24, 2016· 1 Introduction South Africa relies mainly on coal combustion for power generation Low‐grade bituminous coal is combusted for power generation; this in turn generates huge volumes of waste materials such as bottom ash, fly ash, boiler slag, flue gas desulfurization sludge, and noncaptured particles [1, 2]Of most concern is fly ash,
of mine water using coal fly ash (FA) has proved to be promising (Petrik et al, 2003; Gitari et al, 2006, 2008 ; Madzivire et al, 2010 ) Fly ash is an abundant waste material from coal power stations in South Africa Most coal combustion power stations in South Africa are built near the coal mines to ,
The Challenge Eskom’s Kusile new power station near Pretoria and Johannesburg will be the 4 th largest coal-fired power station in the world when fully operational As a bi-product, Kusile also produces hundreds of thousands of tons of coal waste (also referred to as fly ash or coal ash), which requires disposal in protected landfill dumps with enough storage capacity to last 50 to 60 years
A research report submitted to the Faculty of Engineering and the Built Environment, University of the Witwatersrand, in partial fulfilment of the requirements for the degree of Master of Science in Engineering Supervisor: DR M O Daramola Co-supervisor: Prof S Iyuke Johannesburg, South Africa ,
Sep 22, 2020· South Africa’s pioneering role in the use of fly ash in cement production opens the door for the country to reduce its carbon emissions while retaining a strong and innovative cement sector This is according to Hannes Meyer, cementitious executive at South African construction materials leader AfriSam, who says the local sector has already .
A roadmap to upscale transformative innovation in South African homes and communities has been launched The Council for Scientific and Industrial Research (CSIR) partnered with the Department of Science and Innovation (DSI), Department of Human Settlements, Water and Sanitation (DHSWS) to come up with a Science Transformative and Innovation for Sustainable Settlements Roadmap
Nov 01, 2014· The coal fly ash (FA) utilized in this study was obtained from the Ash Resources Pty Ltd ash beneficiation site at Eskom's Lethabo Thermal Power station The fly ash is classified on site and is specified to have a mean particle size between 39 and 50 μm with more than 90% of its particles with diameters less than 11 μm
Predicting the E fficacy of Fly A sh as a S oil A meliorant Richard A Kruger 1, A Karen J Surridge 2 1 R ichonne Consulting, PO Box 181, Woodlands Estate, 0072 Pretoria, South Africa 2 Department of Plant Production and Soil Sciences, University of Pretoria, 0002 Pretoria, South Africa KEYWORDS: fly ash, agriculture, mineralogy, leaching, low molecular weight, organic
Henry Matjie holds Masters’ Diploma in Chemistry from Vaal Triangle Technikon (1997), MSc Degree in Chemistry from the University of Wits (2002) and PhD in Metallurgy from the University of Pretoria (2008) , Extraction of alumina from coal fly ash generated from selected sub-bituminous South Africa coal , Mineralogical features of size .
Steyn Prof Wynand University of Pretoria Sukhai Dr Anesh Medical Research Council Van Aswegen Dr Elsabe Jeffares and Green Van Biljon Mr Bernard Aurecon , Optimising the Usage of Fly Ash in Concrete in the Construction of Roadworks , The State of Rural Transport Research in South Africa – Gauging the Policy Shifts: 1994 – 2014 .
Sep 18, 2018· Research on activation methods is required to overcome the low early age strength and slow strength development in hybrid fly ash cements In this study the activation of a South African siliceous fly ash (70%) for use along with Portland cement (30%) in a ,
Engineering at the University of Pretoria, South Africa He holds the degrees BSc (Eng) (Cape Town), MSc (Eng) (Wits), PhD (University of Texas at Austin) and BComm (SA) His fi elds of research interest are primarily low-volume road design and maintenance, roads for ultra-heavy applications, interlocking block paving, and road management systems
combustion process The disposal of fly ash in landfills or lagoons leaves the disposed ash susceptible to leaching mechanisms thus likely to pollute the surrounding soil and ground, The Republic of South Africa relies heavily on its coal deposits to produce electricity and fuels in order to meet the ever increasing energy demands
Measure Particle Size Distributions in Fly Ash J H Potgieter1, S S Potgieter2, R A Kruger3 and J Krüger4 1 Department of Chemical & Metallurgical E ngineering, Technikon Pret oria, Private Bag X680, Pretoria, 0001, South Africa 2 Department of Chemistry & Physics, Technikon Pretoria, Private Bag X680, Pretoria, 0001, South Africa 3
Proceedings: Strategies for a Sustainable Built Environment, Pretoria, 23-25 August 2000 Morris & Booysen 3 Compressive strength at 28 days vs the degree of stabilisation 100 80 Strength in MPa 79 68 60 Quaternary 55 Sand 43 40 42 34 Decomposed 28 20 21 Granite 00 0% 4% 6% 8% Percentage cement added Further research at the .
adsorptIon on south afrICan Coal fly ash Authors: Evans T Musapatika1 Maurice S Onyango2 Ochieng Aoyi3 Affiliations: 1School of Chemical and Metallurgical Engineering, University of the Witwatersrand, South Africa 2Department of Chemical and Metallurgical Engineering, Tshwane University of Technology, Pretoria, South Africa 3Department of .
Sphathe Engineering and Mining we currently have the following products which we currently looking for buyer's 1Fly and Bottom Ash from Eskom and Group- 100k m/t monthly each
Injection of coal fly ash slurry in deep saline formations for improved CO2 confinement – A theoretical concept , Private Bag X112, Pretoria 0001, South Africa b Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa c Department of Geology, University of Pretoria, Pretoria 0002, South Africa a r t i c l e i n f o a b .
Research, PO Box 395, Pretoria, South Africa Abstract Recent studies have shown that a combination of coal fly ash (FA) and aluminium hydroxide (Al(OH) 3) can be used to treat neutral mine drainage (NMD) and reduce sulphate concentration to within South African drinking water quality standards
Jan 14, 2020· Zeolites synthesized from biomass waste materials offer a great opportunity in the sustainable utilization of the waste In this work, energy-efficient processes (ie microwave and ultrasound irradiation) were used to synthesize pure phase sodalite (zeolite) from coal fly ash obtained from a power plant in South Africa,
Oct 30, 2014· Similar results were obtained for fly ash samples from different locations within South Africa , The elemental analysis obtained from XRF is consistent with the different phases obtained from the XRD data, and the low amount of fluxing ions (Na + , K + , Ca 2+ , etc ) present indicates that the glass (amorphous phase) consists of a high .