However, because of the increased thickness of plain slabs, they can last for significantly longer. Age, along with wear and tear, can be repaired with a topping slab. Concrete used for topping: 4000 psi. 0.40-0.45. Excavate the slab area to a depth of about 7 inches, allowing 3 inches for a gravel base and 4 inches for concrete. yd. The Dilemma. Prior to placing concrete forms: Construct the form with 2x4 or 2x6 lumber and secure in place by wood stakes and deck screws. 0.35-0.40 for precast concrete. Settlement Cracking All actions described for shrinkage cracking plus; Topping slab concrete shall have a minimum compressive strength at 28 days of 4,000 psi. What Is Concrete Topping Slab? A Topping Slab of this type is not bonded to the underlying concrete slab. There are several types of overlays including spray applied, troweled on, self-leveling, stamped and microtoppings. 5.2Slabs-on-ground 5.2.1 Required design elementsFollowing are the minimum items that should be addressed in the construction Sizes are project. Maximum size of aggregate shall be 1 inch, except that 3/8 inch maximum size aggregate shall be used for locations where congestion and other conditions indicate the need for smaller aggregate. a distinct part forming a top to something. is a fluid-applied, elastomeric waterproofing membrane that can be applied to Green Concrete. 2) Sleeper system as already discussed with vapor barrier down, PT 2x4 sleepers, foam board in between, subfloor over, floors down over that. Bleeding is accentuated in slabs placed directly on a vapor retarder (polyethylene sheeting), or when topping mixtures are placed on concrete slabs. A topping slab is a concrete slab poured over an existing subfloor, generally made of concrete or plywood. Typical precast concrete: 6000+ psi. The higher the R-value, the better it insulates. There are two specific ways a topping slab can rejuvenate a concrete foundation during a building redevelopment. You can use a 3/8-nap roller to apply the skim coat . Confinement of strand The project included (not limited to) 1000 square feet of 2 to 2-1/2 fiber reinforced, sloped topping slab. 2: Cracking and concrete spalling of topping slab (plaza deck system) Get all the construction documentation you'll need, in a single click: Specify This Solution ZIP | 14.2 MB Products in this Solution You'll surely enjoy the benefits offered by our Kalman Seamless Concrete slab. For further information on how we can assist on the design of fibre reinforced topping for Precast Floors, please call 0289 5442612 or email info@fibreconcretesolutions.com. Whether you choose to skim coat over plaster or drywall mud, the result is less messy and less dusty. Overlays and toppings typically range from 1/16- to 3/4- inch deep and are applied to structurally sound concrete slabs to improve aesthetics, protect surfaces and extend life in lieu of ripping out and replacing existing slabs. Heavy industrial plants. Available in: 10 lb. There is no mechanical attachment or bonding between the top layer of concrete and the structural floor beneath. (15.2 mm) diameter prestressing strand spaced at 2 in. Topping concrete is defined as a layer of high strength concrete placed on an old, worn out concrete surface to provide a dense, abrasion-resistant surface, to increase structural depth and strength of the base concrete. Advantages Our topping slabs can also be found on podium courtyards as well as inside planter boxes. There is a lightweight concrete slab over the structural roof slab. Spalling concrete is a common problem where part of the surface peels, breaks or chips away. Concrete toping increases the structural depth so that the strength of the base concrete increases. After the old base has been roughened and cleaned, prepare a grout of 1 part cement and 1 part water. Find concrete repair contractors near me. The project was for a new enclosed area repurposed into a lobby for condominiums. of concrete produce slabs with reduced shrinkage and curling. per cu. For a fully bonded application, the topping becomes an integral part of the repaired floor slab. Concrete Paving Slabs & Flags. This is achieved through techniques such as spraying concrete slabs with compounds that create a film over the concrete that retains water, as well as ponding, where concrete is submerged in water and wrapped in plastic. adjective rising above something else; overtopping. something put on a thing at the top to complete it, as a sauce or garnish placed on food. Not only does it increase the strength and durability of concrete structures, it also enhances their serviceability and increases the useable life. If you're interested in getting a free quote or arranging a site visit, feel free to give us a call at 303-674-2290. The 3/8-nap roller leaves a slightly rough texture on the wall. The two slabs do not connect. Item # 10389. 1. Click to select Overview Concrete deck with fluid applied membrane, PRMA, ballasted with cast-in-place concrete topping slab, with XPS insulation between topping and structural slab. Reinforce concrete at corners and columns. Cast-in-place, composite concrete topping is highly recommended to provide a smooth, level floor surface that serves as a horizontal diaphragm when properly reinforced. Only one or two inches (3-5 cm) of head . A single-component, polymer-modified, colored cementitious topping that may be applied from feather edge to 30 mm thickness and textured with Creative Concrete's range of stamping tools to simulate the look of natural stone, tile, and slate. Concrete Accessories Concrete Admixtures Concrete Reinforcing Fibers Cast-In-Place Concrete Precast Concrete This requires placing the topping on a clean, rough surface for maximum bond development. Cut control joints on a very pattern that does not exceed 10 feet in either direction and make the pattern square or nearly so. Be sure that the base concrete is damp so that it will not pull too much water from the topping mix. More recently, hollow-core slabs with depths as great as 16 in. Dudick Inc. Polymer Alloy, Polymer Alloy 1000, Polymer Alloy 1200. Step 2. Dry Shake Hardeners For Concrete Floors. Contact Nitterhouse Concrete Today Step 1. Concrete poured on top of an existing slab needs to be bonded to existing slab by means of an epoxy tie coat must be applied immediately prior to the fresh concrete screed being laid to prevent the topping from curling and delaminating as drying shrinkage occurs. Common depths of prestressed hollow-core slabs range from 6 to 10 in. The biding agent of concrete i.e., cement, needs to retain moisture to gain its strength. Upgrading of existing plain slabs. Whenever a bonded topping is being installed on an existing slab, contamination is a potential issue. Heavy equipment repair facilities. Dust is removed with a shop vacuum. Laurelton Hall, completed in 1905 and cited as Tiffany's greatest work of art, was destroyed by fire in 1957. Topping concrete is a layer of high-strength concrete to increase the strength of old concrete. Topping slabs Ultra-thin whitetopping consists of bonding 2"-4" of fiber reinforced concrete to a worn asphalt surface. Membrane is designed as a thick waterproofing and vapor barrier membrane for applications on horizontal slabs where a topping slab is required. Finishing The type of finishing required for the topping concrete depends on many factors such as place, usage and surface requirement. ABOUT THE AUTHORS: Scott Tarr Consulting Engineer and President of North S.Tarr Concrete Consulting, P.C. Sand/Topping Mix. This process is done when the concrete has reached a semi-dry state. If topping concrete is placed on the existing slab, then it is given rough finish for laying of flooring material. In other applications, the topping slab may be sacrificial. very high in rank, degree, etc.. Sand Topping 60-lb Sand Mix Concrete Mix. The Roadware Easy Injection System for crack and delamination repair. 1) Level the slab with self-leveling compound (if possible), put a vapor barrier down, lay my subfloor plywood, and put down the floors. How I poured a concrete slab over an existing concrete porch slab. For an . At the same time, they tend to be a little less long-lived due to the lack of reinforcement. Spray it with water every few hours in a day, and the project will be much more durable. We just heard of an interior topping slab . Now recognized as a world leader in specialty chemicals and other products specifically engineered for concrete, we continue to bring technologies to the market that focuses on the optimization of costs and durability of concrete. Another method is to dry diamond drill a 2 or 3 inch (5-8 cm) diameter hole into the concrete slab down to the delamination. (410 mm) have become available and are capable of spanning more than 50 ft (15 m). With more than 20 years of experience in industrial concrete floors construction around the world, CoGri Asia's Topping Slab Floor System (TP-FS) is a proven and low risk solution which provides a durable and . bags - 42 per pallet. Ensuring that the concrete is damp can increase the strength of the concrete during the early stages of curing. Also known as scaling, it is the result of a weak surface that is susceptible to damage. The concrete was tested in accordance with . 5). When two slab courses are to move independently of each other or when the topping slab is to replace & un-bonded systems are used. Re: concrete topping on existing slab. Formally West Coast Light Weight Concrete, AUS has specialized in concrete toppings for 35 years. A topping slab will need to be at least 1 " thick in order to accommodate the tubing plus some reinforcing mesh over the top and then to have about " of concrete over everything. 40 lb. The objective of the analysis was to study the effect of the link properties (that is, stiffness) Fig. 80 lb. Thin slabs and long joint spacing tend to increase curling. This is video #3 of my porch to room addition series. Broom Overlay Mix 6000 PSI Add water and mix - Grey or white The city-hired attorneys wrote that concrete testing has revealed defects in the composition of the concrete, the manner in which it was poured, and in the lack of bonding of the concrete to the underlying structural concrete deck in places. Concrete topping, as the name suggests, is the application of high strength concrete on an old concrete surface. Size is determined by a structural engineers, and usually designed in conjunction with a topping slab. Figure 1 shows No. Used for patching and leveling steps, walks and floors. Broom Concrete Finish. What are the correct concrete mixing ratios ratio chart 5 topping slab concrete mix design material quantity kgfm 3 lbjyd table mix design fundamentals considerations for concrete slabs on ground construction specifier floor top . The first is when a floor simply needs to be replaced in an older building that is built out for reuse. Separate perimeter, corners and columns with a flexible material like insulation or sill gasket. Technical Data Sheet TopCrete 610 Aggregates are additives that make up most of a concrete mix. Shop QUIKRETE. Stamped Concrete Finish. Use with concrete acrylic fortifier for applications less than 1-in thick. Swirl Concrete Finish. 3 BFRP reinforcement that was used for this project. The topping concrete should be spread, compacted, screeded and bull floated as for a concrete floor 4. It is a simple yet effective method to rejuvenate deteriorated concrete structures. This type of mix is best for pouring a very thin coat of concrete, such as when topping off or leveling out an existing slab. Install crack control (ie. From elevated walkways, to balconies and terraces, we can cover all exterior areas of wood-framed construction. Browse companies that make concrete topping and view and download their free cad drawing, revit BIM files, specifications and other content relating to concrete topping as well as other product information formated for the architectural community. Shrinkage differences from top to bottom in these cases are larger than for slabs on absorptive subgrades. Topping concrete is the process of applying a layer of high-strength concrete over an old, worn-out surface of the concrete to create a dense, abrasion-resistant surface and increase the structural depth and strength of the base concrete. 1103) consists of a uniformly blended mixture of portland cement, commercial grade sands and other approved ingredients. Concrete contractors are still being penalized when welded wire reinforcement (WWR) is found to be incorrectly positioned in concrete slabs. Concrete topping slab is an overlay designed to provide a dense, abrasion-resistant, and a finished floor surface for multiple purposes such as providing a wearing course to support traffic loads in parking facilities and bus terminals, providing a level surface for interior floors, providing special base for electrical and mechanical equipment, and to resurface worn or damaged floors. Biddle says dosage rates of macro fibers between 3 to 7-1/2 lbs. The Hollow Core slab is manufactured in a standard 4' width and 8", 12", and 12 " thicknesses using a continuous concrete extrusion process. This 36-page guide discusses the basics of topping slabs, both bonded and unbonded, providing you with unique economic options to improve many aspects of your concrete slab, including aesthetics, strength, and serviceability. Contaminates can be present within the slab, even when they are not visible at the immediate surface. We have tested the slabs for moisture content by two different testing companies and the results from both is about a 50% moisture content mainly on the topping slab throughout but there is also high moisture content in many areas of the structural slab. When working with cement-based products, always wear eye protection and waterproof gloves. structural concrete slab supported by the structural steel frame and the concrete topping slab above (Fig. XPS and EPS rigid insulation have an R-value of 4.7 and 3.6, respectively. Concrete broom finishing is done by finishing the rough texture by pulling the broom over the concrete surface. My objective was to create a new lev. The composite action between the thin concrete overlay and underlying surface reduces the stress and allows for a thinner overlay when compared to a unbonded overlay. Approximately 144 square feet of fiber-reinforced infills. In some cases, the use of a high-range water-reducing admixture (HRWRA) may be needed to improve workability. A 4-inch concrete slab has an R-value of 0.4, which is very low; heat escapes through concrete very easily. This is risky business.You should be absolutely certain of the existing slab's integrity.Any cracks will tend to translate to the new overlay.I have used a high strenghth topping mix to level the floor for tile.I also had to use an isolation membrane to negate this problem.The floor I . 60 lb. Purchase concrete with a fine aggregate for small repairs. Typical: 4000-5000 psi. topping slab) Cast-in-PlaCe (CiP) ConCrete Post-tensioned Quality Concrete strength Typical precast concrete: 6000+ psi. Published July 8, 2015 | By axisqueenbee. Mix this to a creamy consistency and brush it into the base just ahead of placing the new topping. Our skilled team looks forward to helping solve your warehouse flooring needs. In order to do so, the minimum thickness needs to be 2 (2-1/4 on hydronic heat systems). noun the act of a person or thing that tops. There is no mechanical attachment or bonding between the top layer of concrete and the. The concrete topping slab constructed by Nosal has cracked, debonded and deteriorated excessively.". ARDEX K 301 Exterior Self-Leveling Concrete Topping is a self-leveling topping and underlayment for fast-track resurfacing and smoothing for exterior and interior applications over concrete and approved, properly prepared, non-porous surfaces, including terrazzo, epoxy coatings and ceramic and quarry tile - on, above or below grade. So the recommendation in this article is that when casting a topping layer of fresh concrete on old concrete, adhere to the following guidelines; (1) Prepare the surface properly (2) Make sure that the substrate is at saturated surface dry condition (3) Use a bonding agent and follow the manufacturer's technical recommendation properly. toppings, the parts removed in topping or cropping plants, as branches. 1: Typical components of a plaza deck system Fig. bags - 80 per pallet. Model # 110360. High Performance Concrete Floors Slabs And Toppings Construction Magazine. Presents the results of an investigation on the transfer and development lengths required for Grade 270, 0.6 in. Marshalls has been the leading concrete paving manufacturer in the UK since the company's inception in the late 19th century. Spalled concrete may be caused by any of the following: Freeze-thaw cycles De-icing salts Poor finishing techniques Like mud slabs, they are usually laid directly on top of the soil. 2" Topping Slab Precast Concrete 14" Tee: 73 : AT001011: 4" Concrete Slab 1/2" Plywood 2" KINETICS RIM L-2-12 2" Topping Slab Precast Concrete 14" Tee : 70: AT001012: 6" Concrete Slab: 53: 27: AT001049: Shredded Rubber Flooring 4" Concrete Slab KINETICS LSM Isolator 2" Air Space, Vented 6" Structural Slab : FIIC 73: AT001066: TREMproof 250GC is commonly used as a between slab on plaza decks, parking decks, roof terraces . A Topping Slab of this type is not bonded to the underlying concrete slab. For a bonded topping, make sure you use a good bonding agent, prepare the existing slab by scabbling the surface and make your control joints in the new slab match the old. 04-06-2002, 12:26 AM. A topping slab is often intended to be purely decorative but nevertheless it has to maintain structural integrity. (51 mm) on center in high. (150 to 250 mm) for spans of approxi-mately 30 ft (9 m). Sika EmeriCrete Topping is designed for use in areas where an extremely durable wear-course is required. THIS ITEM IS CURRENTLY UNAVAILABLE. So if the moisture evaporates gradually, you're less likely to witness any cracks or early deterioration. In practice, a concrete topping layer is often cast in place Topping Slabs Material properties The topping slabs were constructed using BFRP-reinforced concrete. Fiber reinforcing has no impact on the air content of concrete compared to the same sample of non-fiber concrete, but the impact on slump is significant. cant strips to depth of the concrete at critical or flooring transition locations.) Fine aggregates are typically sand or crushed stone. Nitterhouse Concrete Products, Inc. in Chambersburg, PA, is a family-owned company serving the construction industry since 1923. Plain slabs need to be significantly thicker than other kinds of concrete. concrete topping is done to provide a surface abrasion-resistant surface of the concrete. Typical w/cm ratio* 0.35-0.40 for precast concrete. Suitable on interior and exterior applications. Exposed Aggregate Concrete Finish. Z Con was the concrete contractor for the Redwood Campus in Baltimore City, Maryland. The two slabs do not connect. Avoid an overly wet mix and excessive troweling. Salt Concrete Finish. In this article you'll learn: Types of Concrete Topping: Advantages of Concrete Topping: ARCHITECTURAL CONCRETE TOPPING. These . for concrete floor construction are found in ACI 360R for slabs-on-ground, ACI 223R for shrinkage-compensating concrete floors, and ACI 421.1R and 421.2R for suspended floors. These topping slab floor system (TP-FS) are then finished to the required floor flatness for both Free Movement or VNA applications. A thin-topping slab at the Daffodil Terrace, Charles Hosmer Morse Museum of American Art, Winter Park, Fla. Natural gray concrete was floated by machine and subsequently troweled by hand, creating a sporadic leathery sweat finish. He theorizes this is primarily due to the fibers ability . 206. But just because XPS has a higher R-value doesn't make it the clear-cut best choice for rigid insulation. bags - 56 per pallet. If the existing slab had finish flooring, even when the adhesive has been stripped the solvent may have penetrated into the existing slab. Bonded Slabs. Fig 1: Section of topping concrete over existing slab. Give us a call at 717-267-4505 or contact us online for information on more quality precast, prestressed products to meet your design and construction needs. Roadware 10 Minute Concrete Mender is poured or pumped into the void. The use of fiber generally will decrease the same sample by 2 inches. Prior to the construction of the slabs, the concrete and the BFRP reinforcement were tested by independent materials laboratories. in contrast to a solid-slab deck that is comprised of a single concrete element performing the roles of both the structural support and traffic surface, a split-slab, sometimes called a "sandwich slab" is deck comprised of a structural supporting slab over which a topping slab or wear course is installed to handle direct traffic contact and Thin Micro-Topping Produces durable surface to color or stain Self Leveling Overlay Find the overlay to meet your project's needs Stamp Overlay Mix Allows 2 to 6 hours of working time for stamping and carving T1000 Stampable Overlay For use with resurfacing concrete floors and hardscapes. QUIKRETE Sand/Topping Mix (No. Once the mix gets old, concrete has cured enough and won . It can be applied to structural or non-structural slabs exposed to interior or exterior conditions: Waste and recycling tipping floors. bags - 6 per bale. Fibre Concrete Solutions are experts in fibre reinforced concrete and can provide the necessary experience and technical knowledge to provide robust, cost saving solutions. An epoxy tie coat (Sikadur 32) must be applied immediately prior to . Sometimes dry preparation methods such as abrasive blasting are specified to remove grease, oil, paint, and weak concrete. Formulated for placing concrete overlays less than 2-in. You may also send an email to info@kalmanfloor.com. Light-body drywall compound is usually created by shortening water, resulting in a less-messy application.
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