Certainly meets the challenge well. I always wonder when driving behind these trucks if they will start spewing wet concrete all over my car at any minute.
I was wondering if someone would submit an image of actual fresh concrete or a concrete mixer. It happens that there are several. Very bold idea and an execution to match.
Photos of men working - working hard at an honest living have always intrigued me. I don't think we see enough of that genre - it is, I suppose, a version of photojournalism - and you have captured it well here. I applaud your choice to convert to B&W. My concern is that folks who have not actually participated in a large pour will appreciate what you have here. If it were up to me - you would ribbon. Best of luck.