|
|
Post by fish on May 10, 2022 20:57:08 GMT 12
This is interesting. The consent application for sand mining all along Pakiri has been denied, noting that this is for mining at 25 m depth, they still have two applications in play for 5 m and 15 m. That whole area is a pristine natural environment. Kaipara Council put a compelling argument about mining eroding the sand spit at Mangawhai, which would cause all sorts of issues with the river shifting, flooding from storm surge up the estuary etc. The slip side is that the sand for half of Auckland's concrete comes from there. The aggregate & quarrying chief guy is spitting tacks and bitching and moaning. Certainly a good excuse for the price of concrete to go up even more. It might even become as scarce as gib. It is kind of hard to reconcile extracting sand from such a pristine environment to make more concrete for Auckland. Oh well. www.stuff.co.nz/environment/128595020/sand-mining-consent-crushed-ingredient-for-half-of-aucklands-concrete-gone |
|
|
|
Post by em on May 10, 2022 21:37:07 GMT 12
Hard choice to make really ….natural landscape sacrificed for a man made one . All the good deposits of sand in this country happen to be bloody nice places .
I used to surf pakiri a lot and they would mine out deep if there was swell and just off the beach when there was no swell
|
|
|
|
Post by GO30 on May 11, 2022 15:01:22 GMT 12
They have stop sand mining in the Kaipara now.
I fly over it a lot and while I'm not a fan of large scale above ground mining the Kaipara does have much many shit loads of the stuff. I'd prefer Pakiri to be stopped and they take it from mid Kaipara instead or maybe a suction dredge running up and down the west coast between Manukau and the Kaipara entrances, maybe even up to the Hokianga. Spread to love out so as not to concentrate in one spot.
When flying over the Kaipara most of it look less than 300mm deep which is spooky even though most is a lot deeper. The first time I flew low level over North Head to Bon Accord I shat myself at what I've been boating over all these years, reefs and rocks within inches of the surface or so they appear from above.
|
|
|
|
Post by em on May 12, 2022 8:05:12 GMT 12
Recycling of concrete is a big deal in big countries maybe we should follow suit ? I know it happens here already but an awful lot still goes to landfill .
aupuori peninsula would make a great land based sand extraction site but why make a big hole in a nice place to make Auckland bigger ? Tiwai point is a ruddy great white sand peninsula and has a good wharf too…and it’s not in my backyard
|
|
|
|
Post by GO30 on May 14, 2022 11:13:47 GMT 12
Recycling of concrete is a big deal in big countries maybe we should follow suit ? I know it happens here already but an awful lot still goes to landfill . Hell yes we should and in some spots we are which is nice to see. But a lot of old concrete is being used as solid fill which is OK as well as it removes the need to dig more quarries to do the forfil the same need.
There are a shit load of very good very effective recycling programs and equipment out there but we never see it as Govts and Councils tend to run with their pet favourites or won't do squat until some report is done, usually by someone with little real world knowledge of the situation.
Wheels/Grounded build a magnificent machine that can turn computor waste into water, carbon black and a high octane fuel. The system powers itself and can fit into a house hiold garage sized space. It can also turn other waste into the 3 components as well. There should be one of these in every recycling spot as it gets rid of waste while powering itself the the gear needed to do it. But as you try and get funding to get something like this off the ground. You have to have a shit load of coin, 3 times as many reports and deal with absolute ignorant mupperts to do so. He was even asked for a report on how the machine would effect cultural diversity, WTF???
I hate to think how many magnificent ideas that would benefit all humanity have been squished by bureaucrats and their bullshit, I bet it's a huge list.
|
|
|
|
Post by armchairadmiral on May 14, 2022 12:33:21 GMT 12
Yes, there's plenty of magnificent ideas squashed by bureaucracy. But there's also plenty of charlatens trying to scam the bureaucracy.From the figures on consultancy they're having a field day with the bimbos bureaucracy where they just hand out $$$ with no apparent result. Witness Transit or whatever its called .Nearly a 60/40 split on works vs consultants. A cynic (not me) might ask what the staff do.(I know the answer). Have a look at rubbish collection / recycling .Great theory but its not working. This was the greens ideology. Feel good crap .This lot of greens should be tried for sedition to the state.Just a couple of examples
|
|
|
|
Post by fish on May 14, 2022 13:50:37 GMT 12
Interestingly, low carbon concrete is not commercially available in NZ. People want to use it (I know one developer), but can't. The great irony is that one of the core ingredients is fly ash, so with Huntly burning Indo coal, we can make it. In aust, where baseload power is coal fired, they have loads of low carbon concrete.
PS, cement is one of the highest carbon sources in construction.
|
|
|
|
Post by ComfortZone on May 14, 2022 17:19:17 GMT 12
Interestingly, low carbon concrete is not commercially available in NZ. People want to use it (I know one developer), but can't. The great irony is that one of the core ingredients is fly ash, so with Huntly burning Indo coal, we can make it. In aust, where baseload power is coal fired, they have loads of low carbon concrete. PS, cement is one of the highest carbon sources in construction. Yet on the cover page of the current Mahurangi Matters (the local rag, unfortunately not as good for starting the fire as the Rodney Times which is still newsprint) Firth are advertising L C Concrete. I would just be happy if we could get Firth to deliver regular concrete to our project, notwithstanding them being a subsidiary company, concrete supply since August last year has been a nightmare |
|
|
|
Post by GO30 on May 15, 2022 8:40:50 GMT 12
Interestingly, low carbon concrete is not commercially available in NZ. People want to use it (I know one developer), but can't. The great irony is that one of the core ingredients is fly ash, so with Huntly burning Indo coal, we can make it. In aust, where baseload power is coal fired, they have loads of low carbon concrete. PS, cement is one of the highest carbon sources in construction. OK that's tweaked my interest.
What makes concrete so high an emission source and what makes 'low carbon concrete'?
Maungaturoto matters, my new fav local due to the near first time ever seen very interesting adverts and all the little snippets from all the local community mobs, would make a great fire starter, it's old school heavy weight newsprint.
|
|
|
|
Post by ComfortZone on May 15, 2022 9:35:30 GMT 12
OK that's tweaked my interest.
What makes concrete so high an emission source and what makes 'low carbon concrete'?
A key step in the production of cement is the calcination process which requires a shed load of heat (usually coal, which as we know the climate catastrophists abhor) and the reaction has plant food (CO2) as a by product datis-inc.com/blog/clinker-calcination/fly ash is used as an additive, it is not a total substitute for cement, eg we are currently running kerb forming machines and they put fly ash into the mix to help the flow www.thespruce.com/fly-ash-applications-844761#:~:text=Fly%20ash%20is%20a%20pozzolan,compound%20similar%20to%20Portland%20cement. and yes, the Local Matters are a very good source of info for who in the local district does what |
|
