DECORATIVE CONCRETE PDF
in conjunction with the Cement & Concrete Asynciation of New Zealand, Since their introduction decorative concrete systems have become increasingly. Decorative Concrete Seminar - Download as PDF File .pdf), Text File .txt) or read online. seminar report. PDF | Decorative concrete refers to a special kind of concrete. Products made of decorative concrete must meet, in addition to the increased.
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Decorative concrete is an ideal internal flooring solution due to the range . Decorative interior concrete floors enable the .. myavr.info pdf. The coloured concrete range includes a choice of coloured concrete options which then incorporate various textures, lines, patterns, shapes and other effects. myavr.info myavr.info ▫ myavr.info National Ready Mixed Concrete Association ▫ Spring Street, Silver Spring.
The more these expectations can be made clear before the work begins, the more amenable the relationship is likely to be through the project and the better the end success of the project as well. Negotiate a milestone schedule, not a calendar one. One of the key elements of any building project is the schedule.
Trying to keep all subcontractors on time is both a time-management and a financial reality. But with concrete, the danger of running the project by the clock is that a concrete drying schedule cannot be predicted by any rule-of-thumb approach. With concrete flooring, trying to rush the job can ultimately mean a flooring failure of applied floorings or decorative finishes alike. Any excess moisture in the slab will ultimately work its way to the surface where it can cause scaling, staining, adhesive or overlay failure, blistering or other surface problems.
In order to prevent moisture-related flooring problems, relative humidity RH testing provides the best indicator of when a slab has reached the specified moisture level for the chosen finish technique. Negotiating a schedule that allows for the readiness of the concrete floor will save both time and money in the long run.
The standard practices of concrete flooring installation become even more crucial to a successful decorative concrete flooring finish. As much as possible, keep the surface free from contaminants, including possible materials or residue from other subcontractors.
Try to minimize foot traffic over the green concrete slab — even the slightest foot or tool impression can show up when a stain or texture is applied.
Make sure HVAC systems are operational at all times. Clean the surface before applying any finishes, stains or sealers. Provide a maintenance schedule. The mixing process occurs immediately prior to application of DCO to the test specimens. The final step of preparation was high pressure water jetting to finalize the cleaning process before any decorative concrete overlay was applied. Scarifying or grinding down the surface as shown in Figure 2c removes any dirt.
There are two conditions that must be met before the coating can achieve a strong bond with the concrete. After the mixture is complete. The second condition is that the surface must be given a mechanical etch or profile.
Before the first mixture of DCO is mixed and applied. The proportion of a complete mixture used was 8 ounces colorant to 4.
Therefore sufficient cleaning and profiling of the concrete was necessary to prevent any bonding failures. The mixture components of the decorative concrete overlay include cement series polymerized dry component.
Color Charts for Decorative Concrete and Designer Epoxy Coatings
While each technique can be used either separately or concurrently. DCO can be applied using a trowel. The specimens were mixed using a 7-cubic foot concrete mixer and poured into the formwork following ASTM C procedure . Figure 2b presents an example of the cured concrete beams. After 24 hours. Denatured alcohol was then rubbed onto the surface of the concrete for etching.
Decorative Concrete Seminar
The first condition is that the surface must be clean of dirt. All 12 beams were loaded until failure. Flexural Fatigue Testing This test method covers the determination of the flexural strength of concrete by the use of a simple beam with third-point loading .
The series clear coat also enhances the color of the DCO by making it more vibrant. The simply-supported reinforced decorative concrete beam specimens were subjected to loads applied in lb increments.
Manufacturers recommend that the clear coat be reapplied every three years to the overlay for the purpose of preventative maintenance .
Once the concrete surface is slightly moist with the primer coat. This procedure was also applied on slab specimens to resemble a monochromatic brick pattern as pictured in Figure 3c.
As the amount of force at center-span increased. Grout lines were made by laying tape lines as desired prior to spraying the second coating of red colorant on the slabs. In relation to decorative overlay durability. The apparatus. The load-deflection plots in Figures 6a and 6b demonstrate that all twelve beams behaved as typical reinforced concrete beams. Ultimately for both the 28 and day specimens. Under cyclical loading.
This implies that the force applied to the beam caused spalling to the concrete and not the decorative overlay concrete fractured rather than the overlay as seen in Figures 5a and 5b. Directly underneath the hydraulic piston. The average adhesion strength for the day old beams and the day old beams was psi and psi.
This test determines the greatest perpendicular force in tension that a surface area can bear before a plug of material is detached . Table 1. The strength of the overlay to the decorative concrete beam before and after failure was evaluated as per ASTM Standard D Adhesion Strength.
While attached to the decorative concrete overlay. As a result. Extreme weathering and realtime temperature cycling of a concrete field slab treated with DCO did not appear to degrade the bond strength when compared to laboratory-controlled samples. In order to capture real-time weathering and temperature effects. For example. Flexural fatigue and adhesion test results. Average adhesion strength values indicated that the thickness of DCO can significantly influence the bond to structural concrete.
The thinner DCO surfacing showed a double increase in bond strength. In comparison to other CSS tools such as stamped concrete and castin-place panels.
Initial research has indicated that the durability of DCO make it an effective option for the aesthetic treatment of vertical infrastructure surfaces. Thus far. In all twelve flexural fatigue tests. Pull-off adhesion strength testing was conducted when the outdoor slab had already experienced four months of exposure to multiple freeze-thaw cycles.
The results from the portable pull-off testing on the outdoor field section are well within the range shown for other beams of the same age Table 1. DCO was applied to an outdoor field slab Figure 8 in November DCO demonstrated advantages such as ease and speed of application by three simplistic approaches trowel.
American Society for Testing and Materials.
William F. Center for Transportation and the Environment.
This could be most reasonably achieved by the use of professional contractors who are trained in the successful application of DCO. Department of Transportation. Section Colored concrete can be obtained from many ready mix concrete companies and many have color charts available. When done badly, there is no way of correcting any problems, as the concrete is rigid and impossible to patch repair invisibly. This product won the most innovative product award at the World of Concrete.
Techniques to improve the aesthetic appeal of monolithic concrete pavements have been around since the fifties, notably in North America where concrete is possibly the most popular surfacing for patios, drives and 'yards', and in the southern hemisphere, particularly Australia. The load-deflection plots in Figures 6a and 6b demonstrate that all twelve beams behaved as typical reinforced concrete beams.
There are two conditions that must be met before the coating can achieve a strong bond with the concrete.