Spokane Rock Products owns and operates three Ready-Mix concrete plants to serve the Inland Empire. The facilities are located in Airway Heights, Elk, and Post Falls. We offer a wide variety of concrete mix designs including exposed aggregate, shotcrete, and stamped mixes just to name a few. We offer BASF concrete admixtures, synthetic fibers and color system. Spokane Rock Products sells concrete sealers and surface retarders by Euclid Chemicals.
Concrete is basically a mixture of two components: aggregates and paste. The paste, comprised of Portland cement and water, binds the aggregates (sand and gravel or crushed stone). Aggregates are generally divided into two groups; fine and coarse. Cement paste ordinarily constitutes about 25% to 40% of the total volume of concrete.
In properly made concrete, each particle of aggregate is completely coated with paste and all of the spaces between aggregate particles are completely filled with paste. Following are some advantages of reducing water content;
Increased compressive and flexural strength
Lower permeability, thus increased water tightness and lower absorption
Increased resistant to weathering
Better bond between successive layers and between concrete and reinforcement
Admixtures are commonly used to 1) adjust setting time or hardening, (2) reduce water demand, (3) increase workability, (4) intentionally entrain air, and (5) adjust other concrete properties.
Slump is used as a measure of the consistency of concrete. A low-slump concrete has a stiff consistency.
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