Author:Gaigher, LDate:1977Corrosion factors for boilers were calculated for some South African coal product samples using Borio's formula in which "accessible" alkalies were replaced by the total alkalies from the ash analysis.Read more
Author:Kennedy, DADate:Jan 1991Relationships of speed vs density, volume and percentage loop occupation are investigated. The effect of differing directional splits in traffic volumes is also examined. A method of determining the Level-of Service of two-lane roads in terms ...Read more
Author:Netterberg, F; Paige-Green, PDate:Apr 1984The problem of deterioration of lime, lime-slag and cement stabilized pavement layers during curing, before sealing and in service is partly ascribed to carbonation of the stabilizer during curing and subsequent exposure to the atmosphere ...Read more
Author:Mullier, EFEDate:1974This report gives a reflection of the carbonization of coal and the production of metallurgical coke, gas coke, char, gas, and by-products in South Africa during the period 1915 to 1972. Data prior to 1954 is relatively incomplete, but from ...Read more
Author:Kruger, PJDate:Apr 1969The formula sued for determining the percentage fibre breakage on the Noble comb was not suitable for rectilinear combing.Read more
Author:Davidtz, JC; Gray, DDate:1977The selection and utilization of South African raw materials as catalysts in coal conversion depend on the availability of catalysts. Equally important is the -selectivity and activity of these materials for coal conversion.Read more
Author:Turner, PADate:Aug 1987This report discusses the occurrence of falls of ground in strike gullies. Falls of hangingwall over strike gullies on the up-dip side of strike stabilizing pillars in longwall mining systems were investigated. Gullies were examined in both ...Read more
Author:Grobler, TL; Ackermann, ER; Van Zyl, AJ; Olivier, JCDate:Oct 2011The authors use Cavalieri's principle to develop a novel integration technique which they call Cavalieri integration. Cavalieri integrals differ from Riemann integrals in that non-rectangular integration strips are used. In this way they can ...Read more
Author:Paige-Green, P; Netterberg, FDate:Jun 2004The introduction of the SABS EN 197-1 (SANS 50197-1) specification for cements in South Africa resulted in a change in the range of cements available for material stabilization for road layers. An investigation was carried out to assess the ...Read more
Author:CSIRDate:1986The environment in which the CSIR functions has undergone major changes during the first 40 year, which played an important role in shaping the CSIR as it is known.Read more
Author:Hunter, LDate:Nov 1985A range of men's sleeveless cotton vests has been subjected to wearer trial, involving 11 wearers, and to laboratory testing, particular attention being paid to dimensional changes and constants.Read more
Author:Myburhg, JJDate:1975In August 1974, it was requested by the Combustion Department to produce a suitable char for use in their gas producer. It was decided to use Bank coal. The coal was washed at the Coal Preparation Pilot Plant on 19th Jul½ 1974 at a relative ...Read more
Author:Sanders, PJ; De Beer, Morris; du Plessis, HWDate:26 May 2009Various aspects of the determinations and use of elastic moduli of pavements materials are herein addressed. Included is an investigation into the sensitivity of pavement life to changes in elastic material parameters, an update of moduli ...Read more
Author:Schulze, JEDate:Sep 1968This paper which is a continuation of technical report no .95, reports on some additional physical properties of Swiss and French double pique fabrics knitted with the same yarn at three different ratios of yarn.Read more
Author:Fuel Research InstituteDate:1954As explained in previous communications, the Institute has been of the option that the difficulties experienced with the Dense Medium Washery at South African Coal Estate could be largely attributed to changes in the properties of the heavy ...Read more