How Does a Cement Truck Work?

Have you ever wondered how a cement truck can carry enough cement to fill a building? In this blog post, we will explore the components of a cement truck and the process of making concrete. Additionally, we will discuss some of the applications of concrete.

A cement truck also called a concrete mixer truck, carries cement powder, sand, gravel, and water to create concrete. The concrete is mixed inside the truck as it moves to the job site. Most cement trucks have a rotating drum to mix the materials.

To create concrete, the first ingredient is cement powder. Cement is made by heating limestone and clay. This process, called calcination, results in a clinker that is ground into a powder. This powder is called cement.

The next ingredient is water, mixed with the cement to create a slurry. The amount of water added determines the concrete’s strength, as more water weakens the concrete. Sand, a fine aggregate that helps to fill the spaces between cement and gravel, is the next ingredient.

The last ingredient is gravel, a coarse aggregate that provides the concrete’s strength and base for the cement and sand. The strength of the concrete depends on the ratio of cement, sand, gravel, and water. The most common ratio is one part cement, two parts sand, three parts gravel, and four parts water.

The cement truck adds cement powder to the drum to mix the ingredients, followed by water. Sand and gravel are added next. Once all ingredients are in the drum, the truck combines them. Mixing ensures even distribution of the ingredients. After mixing, the concrete is ready for use. Concrete is used for various purposes, including sidewalks, driveways, and foundations.


How Do They Fill a Cement Truck?

The process of filling a cement truck is simple. The truck backs up to the loading dock at the same level, so there is no need for a ramp. A chute is attached to the side of the truck, which extends from the loading dock into the truck. The cement is poured into the chute, and the mixer on the truck prevents it from hardening. Once full, the chute is removed, and the truck is driven away.

What’s Inside a Cement Truck?

A cement truck consists of several parts, the most crucial being the drum. It is where the concrete is mixed, usually made of steel or aluminum, and revolves around mixing the ingredients. The engine is another important part at the front, providing the truck power. The cab, where the driver sits and the controls are located, is at the back of the truck.

How Do Cement Trucks Spin?

The spinning motion of the cement truck keeps the mixture in constant motion, preventing hardening and ensuring even mixing. The rotation also pumps the mixture into the truck’s storage container. A separate motor powers the drum’s rotation, while a series of blades or a screw powered by the same motor keeps the aggregate, water, and cement in constant motion. The operator controls the speed and amount of water added to the mix.

What Is the Difference Between a Cement Truck and a Concrete Truck?

Many of us have witnessed a cement truck speeding down the highway, but not everyone understands what it is carrying. Cement is merely one component of concrete. Concrete comprises cement, water, sand, and aggregate (gravel, rocks, or crushed stone). Cement is what binds everything together. It hardens and provides strength to the final product.

Cement trucks transport cement in a dry form. When they reach the job site, water is added, and the mixture is often agitated or mixed before being poured into forms to create sidewalks, foundations, or other structures. The water activates the cement, causing it to start binding everything together.

Concrete trucks carry ready-to-use concrete that has previously been mixed at a plant. It contains all of the necessary ingredients, including water and cement. All that is required is to pour it into the forms.

Pouring concrete is a time-sensitive process since the moment the water hits the cement; it starts to harden quickly. That is why having your forms set and reinforcement in place before the truck arrives important. Therefore, the next time you see a “cement” truck fly by, remember it is carrying concrete!


Cement trucks are a vital component of the construction process. They are utilized to transport cement to job sites. Therefore, cement trucks are an essential part of the construction process. Cement trucks have several parts, including the drum, engine, and cab.

The spinning motion of a cement truck assists in keeping the cement mixture in constant motion, preventing it from hardening. Additionally, the operator can control the rotation speed and the amount of water added to the mix.

About the author, Laurence Perkins

Laurence Perkins is the passionate car enthusiast behind the blog My Auto Machine. With over a decade of experience in the automotive industry, Perkins has knowledge and experience with a wide range of car makes and models. His particular interests lie in performance and modification, and his blog covers these topics in-depth. In addition to his own blog, Perkins is a respected voice in the automotive community and writes for various automotive publications. His insights and opinions on cars are highly sought-after.