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Date: 2011/02/10
Language: en
Type: Text
Identifier: tut:5794
Description: The aim of the study is to investigate the influence of ruthenium (Ru) additions on the corrosion behaviour of WC–Co cemented carbides when exposed in a reducing acid medium. The study involved the ch ... More
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Date: 2010/01/20
Language: en
Type: Text
Identifier: tut:4845
Description: Galvanised iron is popular in many applications, particular as a roofing material. However, just like other materials, especially metallic ones, it is prone to degradation by corrosion. In this partic ... More
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Date: 2005/07/22
Language: en
Type: Text
Identifier: tut:5796
Description: The physical, chemical and biological nature of Vaal Dam water, the main source of water in Gauteng, South Africa, is often affected by underground water pollution (acid mine water) and industrial eff ... More
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Date: 2005/05/12
Language: en
Type: Text
Identifier: tut:5793
Description: Fly ash is the residue from the combustion of pulverised coal in thermal power stations. It consists of a variety of particle sizes of hollow silica-alumina spheres, which can be utilised as a custom ... More
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Date: 2005
Language: en
Type: Text
Identifier: tut:4199
Description: This paper describes the second part of an investigation into the removal of iron and manganese fromwater with a high dissolved organic carbon (DOC) loading. This investigation focused on the use of f ... More
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Date: 2004/11/01
Language: en
Type: Text
Identifier: tut:3425
Description: This paper describes an investigation to separate and selectively recover silver, gold and platinum from jewellery and laboratory wastes, and produce technical grade material suitable for training pur ... More
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Date: 2004/09/16
Language: en
Type: Text
Identifier: tut:3307
Description: Research concerning the formation and removal of black crusts on various historical objects is approached from many different angles. The so-called “yellowing effect”, observed after laser treatment f ... More
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Date: 2004/04/01
Language: en
Type: Text
Identifier: tut:4202
Description: This paper compares the plant performances of various synthetic gypsums used as set regulators in cement. The decision about the suitability of a specific gypsum was based on measurements and comparis ... More
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Date: 2004/04/01
Language: en
Type: Text
Identifier: tut:3317
Description: This paper describes the findings of an investigation into the preferred method of chloride analysis on South African cement, clinker and raw materials, with low levels of chloride. The investigation ... More
Date: 2004
Language: en
Type: Text
Identifier: tut:3339
Description: The control of over-used cooking oil presents a number of problems. Not only are there health issues to consider, the assessment of the degree of degradation also requires tedious and laborious chemic ... More
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Date: 2003-10-04
Subject: Lime | Geological origin
Type: Text
Identifier: tut:1409
Description: The rate of transformation from CaO to Ca(OH)2 during the slaking process is influenced by a number of factors. In this investigation the effects of common ions normally encountered in the slaking wat ... More
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Date: 2003/04/02
Language: en
Type: Text
Identifier: tut:5405
Description: Chloride, carbonate and sulphate ions are common constituents of many waters and are often found in high concentrations in water used for the slaking of lime. Furthermore, magnesium oxide is a common ... More
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Date: 2003/04/02
Language: en
Type: Text
Identifier: tut:5406
Description: Chloride, carbonate and sulphate ions are common constituents of many waters and are often found in high concentrations in water used for the slaking of lime. Furthermore, magnesium oxide is a common ... More
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Date: 2003/03/31
Language: en
Type: Text
Identifier: tut:4227
Description: The selective extraction of Cr(VI) in a cement matrix, based on treatment with 0.1 M Na2CO3 solution and subsequent determination of chromium by electrothermal atomic absorption spectrometry has been ... More
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Date: 2003-03-19
Type: Text
Identifier: tut:1412
Description: The trace element content of clinkers (and possibly of cements) can be used to identify the manufacturing factory. The Mg, Sr, Ba, Mn, Ti, Zr, Zn and V content of clinkers give detailed information fo ... More
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