Tag: Materials and Construction

Does major industry use QA to hide behind? The cement industry appears to have accomplished this, who in the last 40 years remembers testing cement? we all now receive cement certs as a given, never challenged, well how could you? it's from a factory like an AUDI car, problem is when we have driven the product we can't sort out why the brochure product is not as advertised, we consumers of ready mix are the ultimate users, denied as real customers by the suppliers who use the powder, no link to powder maker so door shut. Is cement a hugely…
How hard can it be to mix four ingredients to produce a stated outcome? aggregate, cement, water and an admixture (or two) We have probably done three of them around the house with a shovel and a board. I once made a whole patio of slabs with my own formwork with embedded red chips floated into the surface. and the real reason for doing it was to prove a mason wrong, whilst having a pint with him he declared, you will never make them frost resistant! Want a bet, I internally cogitated? I was impressed one of his durability factors…
Running up to Christmas, just had company Christmas lunch, do you notice when the loud music starts the older guys head for the door? I am part of that congregation. Anyway I am old enough to remember digging sand replacement densities in lean mix and wondering at the mysteries of comparing them to a theoretical density. Then there used to be a minimum strength, then a minimum and a maximum, then if my memory is correct, a minimum again. Whether it was the blacktop lobby or a diminishing amount of long greenfield road jobs, the good old leanmix was no…
Spent oil Shale is an industrially produced product, unlike blaze, or blase, which is not. Both materials have similar¬†properties as the processes are the same, combustion in shales. It's just that spent oil shale is more reliably burnt¬† being the tip product from retorts that produced oil. Unlike blaze, which is colliery spoil (shale) which has self ignited. So flying out from Edinburgh you have or could have, great views of spent oil shale, literally mountains of it, bings we call it. It is a "specialist" recyclable product to West Lothian. But here is fact lost in time and now…
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