Let's start with the environment. Cement plants have been notorious polluters. With the EPA getting more aggressive with them, they have really cleaned up and now are considered clean manufacturing facilities.
Transporting cement used to be challenging. You used to have to mix it at the build site. Now there are cement trucks that turn while transporting, the mixer turns so the cement can be mixed at the plant. As a result of the mixer, concrete can be poured now in great volume. It's called a monolithic pour which means "one pour". When there are separate pours the concrete is not as strong. These cement mixer trucks have allowed us to safely build these large buildings that we have.
Additives have improved the strength and resilience of cement. There is a whole science to these mixes. One of these mixes allows us to have concrete with less water in it. This is important because water weakens concrete, and when pouring in the winter the water can freeze and weaken concrete. So, these additives allow us to pour concrete all year round.
Rebar is another way to reinforce cement. By putting bar in the concrete it improves the Tinsel strength of concrete. Rebar helps us build these stronger, tall buildings with concrete construction as well.
Self-consolidating concrete is another product that makes it so that there is concrete that can flow easily in all types of cracks and around rebar. It also allows for one pour as well.
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