Does Cement Get Heavier When It Dries?

Concrete is the universal material in construction. Commercial and residential contractors utilize it to create roads, walls, and other surfaces. It plays a vital role in each of the construction jobs. Some activities on cement may impact their weight.

Does cement get heavier when it dries?

Cement gets heavier when wet than dry because the weight of water needs to be considered. One example is that one cubic square foot of water weighs about 10lbs. Most probably, a dried cement block may weigh slightly lower than a wet one. It may occur when a small part of the water evaporates during drying.

We need cement, water, and sand to prepare the ready mix concrete for construction. We purchase various concrete ingredients from places containing pore or air voids between particles.

Both dry and wet concrete have similar weights at the end of the curing procedure. The beginning of the process is pretty different. If you take enough dry concrete for pouring one yard, add water for the reaction and measure its weight.

It will weigh more than the concrete bag you started with. However, not always dry concrete weighs less than a wet one. Different factors affect the weight of both.

Let us understand the weight of both dry and wet concrete along with their differences –

Why Is Wet Concrete Heavier Than Dry Concrete?

There is a difference between wet concrete and dry concrete, but they are not huge. The concrete amount you have does not change too much. Water plays a crucial role in curing concrete and thus becomes a part of the entire weight.

The concrete bucket includes the necessary amount of water for beginning the reaction, which will be substantial. It is more than the initial concrete bag you purchase from the store.

Your final result will be mostly similar weight or amount absorbing/giving a few pounds as water evaporation. Having different types of concrete may not give you a clear idea about which is heavier – dry concrete or wet concrete.

Determining the concrete formation process is the primary step for understanding the product weight in various stages. However, the key is that most of the water will become valuable during the curing procedure. Or it will evaporate eventually.

Water usage in the curing procedure leaves dry concrete to weigh slightly less than wet concrete. We all know that concrete is the amalgamation of aggregates, water, sand, and cement. Hence, water brings all the items in the concrete together through a specific chemical reaction.

Water helps concrete to get hard by combining compounds present in concrete and forming chemical bonds via a process known as hydration. In short, the reason why wet concrete is slightly heavier than dry one is the water portion.

How Much Wet And Dry Concrete Weigh Per Cubic Yard?

Concrete usually weighs about 3900 pounds every cubic yard but can go down to 3500 pounds per cubic yard as the concrete dries. The weight of concrete varies with its types, such as gravel, portland limestone, lightweight, cement, portland, and even reinforced.

The weight of concrete is based on where its origin is and where it was sold. Hence, every precise detail of concrete gives significant weight changes.

Some weights can be low up to 300 pounds per cubic foot, whereas others can exceed 100 pounds every cubic foot.

Does Location Affect The Weight Of Concrete?

Concrete never completely dries technically; it is the result of chemical reactions. As concrete is a mixture of various substances, it can cause cured concrete to become porous.

It will raise or lower the moisture amount in the finished product based on air humidity. We see the hard surface while walking on the concrete, but still, there is 95% of the moisture in your concrete that you initially began with.

Concrete may weigh more according to the region of the country, aggregates that you put in it, and the place of its mining. Some densest concrete is in the Northwestern regions of the US.

Different Types Of Concrete – Different Weight Measurements

As concrete comes in various materials, not all types of concrete weigh the same.

You can say basic concrete has an average weight of about 116 pounds per cubic foot. But a lightweight concrete is also available that weighs less than 100 pounds. Apart from these, specialty concrete weighs over 300 pounds for the same amount.

What Is The Weight Of Reinforced Concrete?

Reinforced concrete is the type of concrete that is commonly useful for large-scale construction. It is created using a steel frame within the concrete to increase strength.

Here, the weight of dry concrete will go higher than wet concrete because of the steel or similar support present inside. Though the weight is more, it is not going to go more than 5 to 15 pounds every yard.

What Is The Weight Of Lightweight Concrete?

Lightweight concrete is famous for being the lighter option than traditional concrete. This type of concrete is easy to use, more flexible, and is a great absorber of shock and sound.

Such concrete contains more porous materials. The highly absorbent formula can take a longer time in drying, but the substantial weight will be pretty similar.

With this lightweight concrete, you have to be more alert to excess moisture because it can increase the concrete’s weight.

What Is The Difference Between Dry And Wet Concrete Volume?

The difference between the volume of both dry and wet concrete are as follows –

Dry volume is the volume of concrete ingredients such as sand, cement, and aggregate in a dry mix before adding water. Wet volume is the volume of concrete components in a wet mix after adding water.

The volume of dry concrete has about 54% fine pores and air voids available between particles of different ingredients. The wet concrete volume has negligible fine pores or air voids between ingredients’ particles.

The volume of dry concrete is helpful for the estimation and evaluation of concrete ingredients when it is ready to mix at the construction site manually. The wet concrete volume helps evaluate and assess components whenever we purchase or order the mix concrete for work.

Which Weighs More – Dry Or Wet Concrete?

The actual answer is that they weigh pretty much the same. There are a few considerations and factors due to which their weights are observed. Different information such as origin, type of concrete, amount of water, region/country, etc., has some role in their weight. Have a glance at the above discussion; you will get a clear and brief idea.