Topic Category: Book 3

Structural Grouting

Grouting is a process in which grout is used to fill in crevices, fissures and cavities in structural formations.  Groutingstrengthens these formations and reduces permeability. Using a variety of methods, construction workers inject grout under pressure, filling the void until it meets the design conditions. Read Book 3 / Unit 3  Review “Words You Should …

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Sealants

Some experts suggest that allow the cost of labor and materials in weatherproofing a concrete project amount to less than one percent of the cost of the job, as much as 95 percent of the repair and maintenance costs associated with concrete structures are a result of weathering. While some damage from weathering is bound to occur, the fact remains …

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Epoxy Floors and Specialty Coatings

While concrete is a durable and strong structural element, there are many instances in which it is not the best material for a finished surface.  The purpose of the concrete surface may require that the material provide a high-traction surface or be resistant to chemicals.  Some concrete walls or floors can be enhanced through color or decorative finishes. For these …

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Underlayments / Overlayments

When concrete floors do not meet the specifications for their intended use, underlayment or overlayment materials can be very effective solutions.  The ability of the cement mason to use the correct materials and application procedures to bring these floors into tolerance for their intended use is critical.  In this unit, you will learn how to prepare a substrate, set up a …

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Exposed Aggregate Finishes

Cement masons expose aggregate to create decorative effects on a variety of concrete surfaces, including walls, driveways and walkways. The concept is simple: after pouring the concrete, cement masons remove some portion of the surface mortar to reveal the underlying aggregate. The amount of mortar removed and the amount of aggregate that is exposed will vary with the specifications and the …

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Decorative Sawcutting

Both scoring and sawcutting can be used to create decorative effects that add depth and texture to concrete surfaces such as floors, patios and driveways. On hardened concrete, cement masons can sawcut lines that are straight, diagonal or circular.  Often these designs created by sawcutting are then stained with a variety of colors or etched …

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Stenciling and Imprinting

Concrete is a versatile material that can be used in many different applications. However, in its natural gray state, concrete can appear plain. Fortunately, the versatility of concrete also allows the use of aggregates, tools, and additives to change the color and texture of the finished surface. Two methods that are especially effective in changing …

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Chemical Staining

Chemical staining is one method available for cement masons to demonstrate the creative effects used in the field of decorative concrete. Cement masons can create impressive artistic effects for a variety of purposes. Staining can turn ordinary concrete slabs into floors that resemble marble or glazed stone. Cement masons are also using staining to create …

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Abrasive Blasting

Abrasive blasting is the process of ejecting a stream of abrasive particles from a blast machine using compressed air propelled at high speeds. Abrasive blasting is used for the cleaning, surfacepreparation and finishing of concrete surfaces. As a finishing technique, abrasive blasting can produce pleasing, decorative effects, enhancing the visual features of the sandblasted surface. Blasting can …

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