Extracted from text ... THE NORTHERN CORRIDOR between Mombassa in Kenya and the Ugandan border is one of the most important corridors in East Africa as it serves Kenya and the landlocked neighbouring countries west of Kenya.
ECONOMIC GROWTH AND DEVELOPMENT
The government of Kenya identifi ed the Northern Corridor as an excellent investment opportunity for the private sector to ensure long-term sustainability and effi cient trans-
portation along the corridor. Kenya's economic growth is intrinsically linked to the improvement and continuous maintenance of the 1 200 km corridor be-
cause it serves as an economic lifeline for the transportation of goods between the Port ..
Extracted from text ... Text Graham RossReferences available on request
Some early South African
road traffic regulations
TO START OFF, let me muse as to whether it is right to travel on the left.
In about 1000 BC the approaches to Tyrins, the Arcadian Greek fort near Argos, were designed so that the gate sentries had a clear view of the right sides of approaching people. This enabled them to see whether their swords were sheathed (friends) or drawn (unfriendly people) and to take any necessary action. It had to be the right side because shields were carried on the left arm. ..
Easy-to-use complement to CAD tools
<br>VAE switched to a new track
<br>New Kimberley prison
<br>Tarfix sets the standard for labour-based seal construction
<br>New board members for Vela VKE
<br>Alternative funding for the maintenance of intersections
Extracted from text ... Event Date Additional info Venue Contact
SAICE Afternoon Lecture
28 September 2005 - Transportation:
CoJ Strategic Public Transport Network
5 October 2005 - Geotechnical: The
Geotechnical Practice in SA with particular
reference to the Menard Pressure Meter Test
12 October 2005 - Professional Issues:
Professional Registration for Civil Engineers
19 October 2005 - Structural: Topic to be advised
26 October 2005 - Environmental: Sustainable
1 November 2005 - Geotechnical: Pipe
Jacking and Trenchless Technology
16 November 2005 - Professional Issues:
Identifi cation of work and ECSA CPD
Speaker: Dr Michael
Speakers: Johan Pienaar, ..
Research was done to establish the influence of entrained air on concrete under South African conditions. Furthermore, it was desired to know whether, by entraining air, a very coarse sand with only 2,4 per cent passing the No. 100 BS sieve could be used to make concrete of a high quality. Relationships between workability and A/c ratio, and strength and workability, were established for concrete made from 20mm ( inch) crushed aggregate with a continuous grading and containing 5 per cent entrained air. The factors affecting the amount of air entrained in the mix are reviewed, as well as the influence of entrained air on the properties of the mix.
Dumps of waste anthracite duff built on hillsides pose an interesting problem in slope stability. The strength characteristics of duff wer nvestigated by means of laboratory and in situ tests. Through these measurements, a preliminary analysis was made of the stability of dumps on sloping ground. A modified cone-vane instrument, used for measuring the in situ strength of granular materials, including duff, is descriptionbed.
Mica is generally known to be a deleterious substance in aggregates used for the manufacture of concrete. In regions where micaceous aggregates are the only materials available they have nevertheless been used extensively for this purpose. There is thus a discrepancy between the engineer's distrust of a material regarded as deleterious and an impressive record of successful use of this material. An investigation was carried out by the National Building Research Institute to determine the effect of mica contained in the fine aggregate upon the workability, compressive strength and drying shrinkage of concrete made with such an aggregate. It was found that the effects depend much more on the nature of the micaceous particles than on their quantity. Mica in the form of biotite caused only small effects, whereas the presence of muscovite profoundly changed the concrete-making properties of a fine aggregate.
The paper discussed the fact that shrinkage and creep measurements in laboratory tests may be misleading unless due account is taken of the moisture content and dimensions of laboratory specimen and prototype. A method of estimating moisture losses in concrete units of various dimensions was given and the corresponding orders of difference in shrinkage were indicated.