Cement Specifications Unpacked
The Western Cape Branch held a half-day seminar recently focusing on cement specifications. The event was attended by 70 members and guests and was held at the offices of SANRAL in Bellville.
The seminar featured three prominent speakers from the cement and concrete industry and the objective of the event was to give industry an update on the current norms in specifying cement in the Western Cape region.
Steph Bredenhann, from SANRAL was the second presenter and his talk was titled “Achieving road stabilisation specifications, and specification of cement per region”. The speaker explained the varied and wide spread use of cement at the SANRAL organization, emphasizing that cement is used in 6 of the 12 chapters in the COTO document. Further topics discussed included an introduction to road stabilization, curing regimes for design and construction, experimental design and material properties, initial consumption of cement, effect of conditioning time, effect of distance from laboratory (travel time) and influence of type of stabilizing agent.
He went on to show how the Na2Eq content can be calculated for a particular cement, to predict the probability of concrete being susceptible to AAR.
He gave further insights into how cement and aggregates can be specified to mitigate the probability of AAR forming.
commended for providing many resources for this event and contributing to making it a success.
|Philip Ronné Mfundo Taliwe and Joseph Mofokeng|
|Delegates listen to Prof Mark Alexander|
|J Henning Ero Engineers with Clint Wicomb PPC|