As a general rule, aggregates are normally thought of as inert filler that is present inside a concrete mixture. However according to concrete delivery Minnesota experts, closer inspection reveals that it has a vital role as it can influence the properties of hardened and soft concrete.  For instance, changes in unit weight, level of moisture, maximum size and gradation can change the performance and character of your concrete mixture.


Another important reason for considering aggregate carefully is price.  You have the potential of being able to save a lot of money by simply opting for the maximum allowable aggregate size. According to ready mix concrete delivery Minneapolis MN experts; using larger coarse aggregate normally decreases the cost of a concrete mixture by also reducing the requirements for cement which for all intents and purposes is the most expensive component.  Reduced cement within reasonable limits of durability will translate to lesser water used if the ratio between cement and water is kept constant.  Reduced water content will also minimize the possibility of shrinking and cracking that is normally found with restrained volume change.

Usual Aggregate Proportions

Aggregates encompass approximately 60 to 80% of a regular concrete mixture. This is a good enough reason to select the correct ones that are not only durable but offers optimum efficiency when mixed. It needs to be properly controlled to offer consistent strength for the concrete, durability, finish ability and lastly workability.

Quality Matters

aggregateIf you are considering a concrete project, it is important that you select a producer that buys only excellent quality aggregate that has been verified by an aggregate test to comply with ASTM C 33 Standard Specifications for Concrete Aggregates.  Another indication of good performance would be the past track record of a local aggregate.   Essentially speaking, high quality aggregate needs to be strong, hard, and clean and provides durable particles. It also needs to be free from any contaminants such as chemicals, clay coatings. Avoid those that are friable and prone to splitting. Do not use those that have large amounts of soft and porous materials.

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