Not All Concrete
Is Created Equal
It is a misconception that one load of concrete is equal to the next. Many things affect the durability, strength and appearance of concrete from when it is manufactured at the plant all the way down to the finishing process. To ensure a high quality and consistent product, Folsom Ready Mix utilizes premium, environmentally friendly materials in all its concrete to maximize strength and assist its customers in the finishing process.
Folsom Ready-Mix Products
Concrete Additive
ADMIXTURES
Admixtures are materials other than cement, sand, aggregates, and water that are added to concrete or mortar immediately before or during mixing to either modify the properties of hardened concrete or to ensure the quality of concrete during mixing, transporting, placing, and curing. Admixtures can be used to provide greater plasticity, workability and earlier levels of strength than from normal concrete.
Seven core areas that make up admixtures
Supplementary Cementitious Materials (SCM’s)
Supplementary cementitious materials, also called mineral admixtures, contribute to the properties of
hardened concrete through hydraulic or pozzolanic activity. Typical examples are natural pozzolans, fly ash, ground granulated blast-furnace slag, metakaolin, and silica fume which can be used in conjunction with Portland cement to product various hardened concrete properties.
These materials react chemically with calcium hydroxide released from the hydration of Portland cement to form cement compounds. These materials are often added to concrete to reduce permeability, increase strength, or influence other concrete properties. Fly ash, the most commonly used pozzolan in concrete, is a finely divided residue that results from the combustion of pulverized coal and is carried from the combustion chamber of the furnace by exhaust gases. Commercially available fly ash is a by-product of thermal power generating stations.
Set Accelerators
Concrete sets more slowly when it is cold, especially slow when it is below 50 degrees. Accelerating chemicals reduce the initial set time of concrete and are recommended in cold weather. In cold weather, set accelerators will greatly reduce the time required for finishing activities. With the proper use of accelerators, concrete can be put into service within hours of placement if needed.
Folsom Ready Mix can recommend a dosage rate based on your project needs and set time requirements.
Retarders
Retarding chemicals have the opposite effect of accelerating chemicals, delaying initial set times of concrete. Such admixtures are primarily used during hot weather or when travel times from the plant to the project location exceed 45 minutes one way. Retarders delay the hydration of cementitious materials through a chemical process. This allows customers to continue to place and finish the concrete mix even when there are extremely hot temperatures as well as a longer than normal travel times from the time the concrete is manufactured at the plant to when it is poured at the job site. In addition, we recommend utilizing retarders when placing lightweight concrete, shotcrete, pervious, and anything with low water to cement ratio.
Folsom offers retarding admixtures in varying doses based on your project needs. We’re happy to consult with you on your project’s specific needs to identify the right dosage to ensure maximum strength and workability.
Water Reducers
Water reducers are used to promote the “finishability” of concrete by allowing an increased slump or increased workability without negatively impacting the durability, strength or water-cement ratio. Often times water reducers are utilized to help with finishing as they create a “creamier” product without increasing the water content in the concrete mix. Typically, the higher the water to cement ratio the lower the strength of the concrete and the higher risk for cracking. Additionally, water reducers can be utilized to help with pumping of concrete as they help maintain a consistent slump without the use of water. Again, this helps the workability of the concrete mix without sacrificing strength.
Folsom offers the full range of water reducers, from low range, mid-range and high. Each type of water reducer offers specific properties depending on what you are trying to achieve with your concrete mix whether it be early strength requirements, slump retention or general workability.
Fiber / Strength Enhancement
Concrete has natural strength in compression (squeezing force) but little tensile strength (pulling force). For this reason, many contractors utilize steel mesh or rebar to reinforce concrete’s tensile strength. In addition to steel, synthetic fibers also have relatively high tensile strength to aid in supplementing the tensile strength of concrete.
Folsom Ready Mix offers a wide range of concrete fibers to help improve durability and control cracking on your project. Fibers work by adding bonding properties within the concrete mix thus holding cracks (not seen on the surface) tight. Fibers are especially effective against “plastic shrinkage cracking” that occurs as water works its way out of the concrete during the cure process. Additionally, fibers can also help prevent cracking caused through settlement through the same bonding properties. Certain fibers can be replacements for rebar and other steel applications on a job. However, you should consult your contractor and/or Folsom Ready Mix for guidance prior to eliminating all steel in your project.
Specific Performance or Specialty Admixtures
There are several specialty admixtures that can aid in various concrete applications. Please consult with a sales or quality representative for ideas or help with these unique products.
Some common products that we carry are:
Viscosity Modifying Admixture (VMA)- This product helps to make a plastic concrete mix more cohesive helping in pumping and placement activities.
Shrinkage Reducing Admixture- This product when used at varying doses can help to reduce concrete shrinkage during the curing process. This will result in a more durable concrete and help to aid in crack reduction.
Water Proofing Admixture- Xypex or Moxie are commonly used products for water proofing applications. We carry both products and would be happy to discuss its application and recommended dosage rates.
There are several other types of specialty materials that can help with many other applications. If you are pouring under water or in a highly congested area with lots of reinforcement or rebar we can help find a solution for you!
Color
Folsom Ready Mix offers a wide range of liquid color additives that will provide a long-lasting and visually appealing concrete product for any home. Our color admixtures are integrated into our concrete mix designs and automatically dosed at our plants to help maintain consistency across multiple loads. However, variation can occur due to the natural properties associated with our aggregates (rock and sand) as well as our cementitious materials, among other factors.
In addition to the standard options, we also offer color matching for colors that are not offered by our supplier. In addition, for projects requiring green color additives we require a minimum 1 week lead time to get those pigments in due to low demand. Consult our sales department for questions regarding any colored concrete solutions.
Alliance Partners
