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Tag : spalling

Feature

Corrosion impact on bridge infrastructure

Gill PrenticeApril 13, 2018October 28, 2022
by Gill PrenticeApril 13, 2018October 28, 2022
Throughout the region there are tens of thousands of bridges and related infrastructure and the design and construction material used to build these assets presents...
Auckland Harbour BridgeAustralasian Corrosion Associationcarbonationcathodic protectioncorrosiondelaminationelectrochemical chloride extractionelectrochemical re-alkalisationrust stainingsalt attackspallingVinsi Partnersweathering steelWSP Opus

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Deep dive into our archives- this time a profile f Deep dive into our archives- this time a profile from 2013 of Caterpillar's 623 scraper.⁣
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Caption: A used 623B waits in the sun at a sand & gravel plant. An open frame ROPS is fitted with an aircon unit on top of the cab! The rock guard has been removed from the elevator frame but otherwise the machine appears in good shape.⁣
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Read the full profile by clicking link in bio
Deep dive into our archives- this time a profile f Deep dive into our archives- this time a profile from 2013 of Caterpillar's 623 scraper.⁣
⁣
Caption:  Clay was really good loading material for elevating scrapers, the more loamy the better. This 623B gets a good load on a slight downhill grade. Door has been removed from the cab to keep the operator cool as this 623B has no aircon.⁣
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Read the full profile by clicking link in bio
Deep dive into our archives- this time a profile f Deep dive into our archives- this time a profile from 2013 of Caterpillar's 623 scraper.⁣
⁣
Caption: One of the first 623B elevating scrapers off the production line awaits delivery to its new owner. Full rear fenders and mud flaps are noteworthy. Fortunately, later on commonsense prevailed and these were removed from production machines and only offered as an option.⁣
⁣
Read the full profile by clicking link in bio
Deep dive into our archives- this time a profile f Deep dive into our archives- this time a profile from 2013 of Caterpillar's 623 scraper.⁣
⁣
Caption: Working in some fairly sticky Illinois clay, this 623 is near new. The photo is dated 1972 and points of note are the lack of ROPS, the open mesh rock guard on the elevator and the full set of rear fenders and mudguards that are fitted. It appears that OSH at the time were more worried about the traffic getting sprayed by mud rather than the machine falling over!⁣
⁣
Read the full profile by clicking link in bio
Read the full profile by clicking link in bio Deep Read the full profile by clicking link in bio Deep dive into our archives- this time a profile from 2013 of Caterpillar's 623 scraper.⁣
⁣
Caption:  An original 52U-series 623 awaits its next job. Comparisons to the open bowl 621 tractor unit of the period are obvious. The machine is fitted with standard extra capacity muffler, optional ROPS and the mesh rock guard has been removed from the top of the elevator frame. No 52U series 623’s were imported into New Zealand.⁣
⁣
⁣
Read the full profile by clicking link in bio
Deep dive into our archives- this time a profile f Deep dive into our archives- this time a profile from 2013 of Caterpillar's 623 scraper.⁣
⁣
⁣
Caption: An original 52U-series 623 awaits its next job. Comparisons to the open bowl 621 tractor unit of the period are obvious. The machine is fitted with standard extra capacity muffler, optional ROPS and the mesh rock guard has been removed from the top of the elevator frame. No 52U series 623’s were imported into New Zealand.⁣
⁣
Read the full profile by clicking link in bio
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