If someone is trying to build a huge fuckoff concrete thing - say, for instance, a giant wall - they’re going to need an obscene quantity of concrete, and that’s all going to have to be transported there from the nearest mixing plant. This means they’ll have multiple trucks coming by to decant concrete in consecutive pours while the workers place it and vibrate it to ensure it all intermixes and sets properly, forming a monolithic mass. If one pour is allowed to set before the next one is added, you get a big, ugly, possibly structurally unsound gap between the two called a “cold joint.” A bad enough cold joint can completely fuck your whole project because the next engineer or inspector who sets foot on that site is going to take one look at that motherfucker and immediately embark on a quest for blood vengeance. You will literally have to cut that whole section of wall out, slap some dowels in the nearest structurally sound bits, and re-form and pour the offending segment from scratch, which represents a fortune in cost overruns and will make everyone involved very upset. This is an especially bad problem in hot climates, because the concrete curing process is exothermic - that stuff sets much faster when it’s really hot out, and its 28-day compressive strength tends to be poorer as well.
So if, hypothetically speaking, you wanted to completely shit up a wannabe dictator’s enormous unfeasible poured concrete vanity project, you could literally just randomly hassle and delay every concrete truck on its way there. Dude’s gonna end up with a giant worthless pile of shitty crumbling concrete and exposed reinforcing steel, and an army of pissed-off contractors to boot.
