Man with no name Posted November 1, 2017 Share Was wishful thinking Sorry [emoji849]Hope springs eternal [emoji1373] Sent from my iPad using Tapatalk 'Dale 1 Link to comment Share on other sites More sharing options...
Man with no name Posted November 1, 2017 Share I shall inspect tomorrow and report back! Interval time! Sent from my iPad using Tapatalk Christie 1 Link to comment Share on other sites More sharing options...
FirstV8 Posted November 1, 2017 Share Just a question for those in the know, engineers etc. Won't a rough surface like that just wear down quicker because of all the 'gripping points'? Won't a couple of thousand buses and cars just wear that down quickly then everything will be smooth again? We have a 12 km piece double carriage road on the east rand that carry's huge amounts of traffic and that was "Chip and Tar " 20 years ago and its still 'Terrible " to train on . Edited November 1, 2017 by FirstV8 Oufy MTB (Roadie) 1 Link to comment Share on other sites More sharing options...
samson99 Posted November 1, 2017 Share Hey hubbers,As a pavement engineer (i design the road layerworks including the surfacing), the photo shows a single 14mm aggregate (stone) surfacing which i read somewhere was applied using bitumen rubber (more flexible properties than standard bitumen). I believe in order to create a safe surface (with skid resistance properites for the cars), asphalt with rolled in chips could have been utilised. Unfortunately this is a very expensive option. The cheaper alternative is a Cape Seal which i believe is what this surfacing is. A single layer of slurry will be laid over the aggregate and brushed in. This will leave approximately 2-4 mm exposed aggregate to help with the skid resistance. The slurry will be applied in the coming weeks after all the volatiles have been released from the bitumen rubber. The waiting period between the aggregate and slurry being applied helps with dislodging loose aggregate. I hope this makes sense. Bloukrans, splat, Pure Savage and 12 others 15 Link to comment Share on other sites More sharing options...
buchanan Posted November 1, 2017 Share Hey hubbers,As a pavement engineer (i design the road layerworks including the surfacing), the photo shows a single 14mm aggregate (stone) surfacing which i read somewhere was applied using bitumen rubber (more flexible properties than standard bitumen). I believe in order to create a safe surface (with skid resistance properites for the cars), asphalt with rolled in chips could have been utilised. Unfortunately this is a very expensive option. The cheaper alternative is a Cape Seal which i believe is what this surfacing is. A single layer of slurry will be laid over the aggregate and brushed in. This will leave approximately 2-4 mm exposed aggregate to help with the skid resistance. The slurry will be applied in the coming weeks after all the volatiles have been released from the bitumen rubber. The waiting period between the aggregate and slurry being applied helps with dislodging loose aggregate. I hope this makes sense. Hi samson. Thanks for this explanation. So in your opinion, does this mean that the final surface should be smoother than it is now, but still a bit coarser than the old "smooth" surface? Link to comment Share on other sites More sharing options...
Sharkie 2 Posted November 1, 2017 Share Yeah went up there yesterday, albeit from Hout Bay side, its not your "smooth" road surface, its the type that looks like many stones stuck together, Looks almost like a rice cake kinda surface... I hope and pray it's not how it will stay... If it is, its going to be a very uncomfortable ride...Chip and spray is what they call itProvides good weathering and more cost effective than applying rolled asphalt.Many roads up in Gauteng are done this way Link to comment Share on other sites More sharing options...
samson99 Posted November 1, 2017 Share Hi samson. Thanks for this explanation. So in your opinion, does this mean that the final surface should be smoother than it is now, but still a bit coarser than the old "smooth" surface? Simple answer yes. If you have ever ridden in the winelands, the road surfaces that we generally cycle on are chip and spray (as sharkie correctly pointed out) and are roughish but cycleable. Asphalt is the smooth surface but has limited skid resistance properties especially on a steep downhill when wet. Bloukrans and Capricorn 2 Link to comment Share on other sites More sharing options...
Long Wheel Base Posted November 1, 2017 Share We have a 12 km piece double carriage road on the east rand that carry's huge amounts of traffic and that was "Chip and Tar " 20 years ago and its still 'Terrible " to train on . Heidelburg road? Link to comment Share on other sites More sharing options...
fanievb Posted November 1, 2017 Share julle Capies kla darem wragtig met die witbrood onder die arm.Be thankful that your roads are being repaired/maintained https://showme.co.za/east-london/news/gonubie-resident-spruces-up-potholes-in-area/ andhttp://www.heraldlive.co.za/news/2016/02/26/cyclist-pothole-accident-dies-hospital/ mikkelz, gogo@ and Oufy MTB (Roadie) 3 Link to comment Share on other sites More sharing options...
Oufy MTB (Roadie) Posted November 1, 2017 Share Hey hubbers,As a pavement engineer (i design the road layerworks including the surfacing), the photo shows a single 14mm aggregate (stone) surfacing which i read somewhere was applied using bitumen rubber (more flexible properties than standard bitumen). I believe in order to create a safe surface (with skid resistance properites for the cars), asphalt with rolled in chips could have been utilised. Unfortunately this is a very expensive option. The cheaper alternative is a Cape Seal which i believe is what this surfacing is. A single layer of slurry will be laid over the aggregate and brushed in. This will leave approximately 2-4 mm exposed aggregate to help with the skid resistance. The slurry will be applied in the coming weeks after all the volatiles have been released from the bitumen rubber. The waiting period between the aggregate and slurry being applied helps with dislodging loose aggregate. I hope this makes sense.Hubbers me think Samson99 was following this thread from day one and probably said: "lets see what the hubbers come up with and I will post when it reaches page 6" Pure Savage, Akon and Bloukrans 3 Link to comment Share on other sites More sharing options...
'Dale Posted November 1, 2017 Share Thought it was a phased approach.Thanx, Samson Edited November 1, 2017 by 'Dale Link to comment Share on other sites More sharing options...
Pure Savage Posted November 1, 2017 Share Hey hubbers,As a pavement engineer (i design the road layerworks including the surfacing), the photo shows a single 14mm aggregate (stone) surfacing which i read somewhere was applied using bitumen rubber (more flexible properties than standard bitumen). I believe in order to create a safe surface (with skid resistance properites for the cars), asphalt with rolled in chips could have been utilised. Unfortunately this is a very expensive option. The cheaper alternative is a Cape Seal which i believe is what this surfacing is. A single layer of slurry will be laid over the aggregate and brushed in. This will leave approximately 2-4 mm exposed aggregate to help with the skid resistance. The slurry will be applied in the coming weeks after all the volatiles have been released from the bitumen rubber. The waiting period between the aggregate and slurry being applied helps with dislodging loose aggregate. I hope this makes sense. Well its good to know its not the final finish, I am not so worried about the rough surface going up, just the loose aggregate in the corners as it was rather hairy on the way down. Thanks for your insight. Link to comment Share on other sites More sharing options...
'Dale Posted November 1, 2017 Share Well its good to know its not the final finish, I am not so worried about the rough surface going up, just the loose aggregate in the corners as it was rather hairy on the way down. Thanks for your insight. Like marbles Link to comment Share on other sites More sharing options...
Chingy182 Posted November 1, 2017 Share finally, a piksha - bliksem...that looks like it's been scattered over the surface!looks like a nice rock garden Link to comment Share on other sites More sharing options...
lechatnoir Posted November 1, 2017 Share Like marbles That's good to know - some intervals there tomorrow... Link to comment Share on other sites More sharing options...
Man with no name Posted November 2, 2017 Share So I did my steady state recce this morning. I am no civil engineer but I will be utterly surprised if that current layer is the final one. That said please take care on the descents, lots of loose shite currently Good see the Savages and the La Perlas Sent from my iPad using Tapatalk Link to comment Share on other sites More sharing options...
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