Author:Tromp, FJ; Bushell, LADate:1945Work published by the FRI shows that the relative friability or the relative ease of disintegration of coal, can be measured by its shatter index.Read more
Author:Carter, RADate:Dec 1983The Bree River estuary is very large and although there are problems associated with limited fresh water supplies and an active dune field on the north bank of the mouth, there is considerable potential for development. After a long history ...Read more
Author:Kleyn, EG; Sadzik, ES; Rust, FCDate:Apr 1999This paper describes the managerial approach and the process developed by the CSIR and the road authorities in managing the HVS projects and implementing the findings.The paper concludes with diagrammatic representation of the interactive ...Read more
Author:Erasmus, TCDate:1967A study of the ignition of pulverized coal in a furnace was undertaken at the FRI of SA, along the lines set out by the French Fuel Research Centre. This report briefly describes the technique and the original apparatus.Read more
Author:Bethlehem, LDate:2001South Africa’s first democratic elections in 1994 swept a new government into power which, for the first time, enjoyed the support of the majority of citizens. That government has initiated an ambitious programme of change in all sectors of ...Read more
Author:Estuarine and Coastal Research Unit, ECRUDate:Apr 1981This report entails available historical information on Buffels estuary and abiotic and biotic characteristics found in the estuary are presented. Although the Buffels River has a relatively large catchment compared with most other major ...Read more
Author:Heinecken, TJE; Bickerton, IB; Morant, PDDate:Jun 1982This report is a synthesis of all available information on five of the smaller rivers discharging in to False bay combined as a single volume. The rivers dealt with are the Buffels (Wes), Elsies, Sir Lowry' Pass, Steenbras and Buffels (Oos). ...Read more
Author:Bolton, M; Burroughs, SDate:2001This report is a guide to building strong earth houses that will last a long time but without having to spend a lot of extra money or hire outside experts to do the building. It supports the process of improving the quality of earth housing ...Read more
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: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: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: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
Author:Tarboton, WRDate:Sep 1977A provisional avifaunal checklist based on observations made during the period September 1974 to July 1976 is presented. Of 325 species recorded, 197 are classified as resident, 64 as migrant, 14 as sporadic, 13 as vagrant while 37 are of ...Read more
Author:Beyers, E; Van Rooyen, DDate:1950Comparatively few investigators have studied the reaction of halogens with coal. Evidence was found that substitution and addition reactions occur and that more hydrochloric or hydro bromic acid may be formed than could be explained by a ...Read more