High-rise buildings are present in many cities, and are often referred to as skyscrapers. They are defined by being 75 feet or taller and require concrete that is more durable. They are primarily used for hotels, apartments, and offices, but can also be used for retail and educational spaces. It is important that these buildings have the proper structural systems and structural frames because they are among the largest buildings built. Different loads require different types of structural systems. Having the proper structure is essential to ensure that the building doesn’t collapse.

As taller high-rise buildings are in demand, concrete contracts are challenged to create a concrete mixture that can be effectively used for these structures. The mixture is crucial when determining the strength and durability of the concrete. A higher grade of concrete mix is called for, but that could eliminate some of the workability characteristics of concrete. Pumpability is also an obstacle to overcome when the height increases. High-range water reducers are used for the application process and rheology modifying admixtures can increase the functional characteristics of the mixture. There are many aspects to consider while deciding the right water reducer and rheology modifier, thus making it a complex process. 

Creating the right mixture is being able to balance multiple goals. Concrete contractors should be able to formulate a mixture that is strong and workable, but also at an appropriate price for the client. To meet all the goals, all elements from concrete proptionion to production process should be considered. When chemicals are used within the mix, the higher the variability from load-to-load, but the use of admixtures is needed in concrete. It is the matter of to what extent and what type to use. Consulting with a concrete admixture expert can lead to more informed decisions and make the process efficient. Construction contractors should balance their project goals and find ways to optimize mixtures. 

Being able to optimize mixtures can be another challenge that concrete contractors face. Four categories must be analyzed while formulating the mix: fit, function, finish, and finance.  Does the mix match the specs of the project? Does the concrete function well in production? Does the concrete have a good finish and does it serve its purpose in the field? What are the associated costs? These are all important questions to be asked throughout the process of crafting the right mix. 

Producing consistent concrete can be difficult across a large scale project, like a high-rise. The concrete can vary from load to load. Small changes can greatly influence the quality and strength. A minor alteration in material properties such as aggregate moistures can have significant impact. The transportation of the mix could also lead to changes in the content of the mixture. An in-transit management system can help create greater consistency across loads and optimize mixes. It monitors the concrete while being transported and alerts the contractor with any potential changes made. The height of the high-rise determines how stiff the concrete needs to be. Minimal differences in the amount of air and water in the mix can alter the durability. That is why it is important to have a system to monitor any possible changes to the mixture during the production.

Concrete mix is only one aspect of many that needs to be considered in the process of designing and planning for a high-rise. Finding the right contractor can ensure the quality of the process and the material that is being used. We are an experienced company that takes pride in the results that we deliver to our clients.