How to Join Two Concrete Slabs | Hunker e) Be doweled into existing curbing, as applicable. Our Process - Concrete Solutions of Atlanta I would recommend against dowelling into a 150mm slab as it very often breaks out the concrete. Because its the easiest quickest way to do the form work. Bottle brush and air for 30 seconds. Celtic will not be responsible for any permits or cracking that occours in concrete. Question: How Deep Epoxy Rebar In Concrete? - Epoxy Resin Blog sidewalk at existing tool joint surface be level with concrete shall match color of and joint sealing compound 4 ' 5 shall be placed on a b. a min. I need to dowel #8 rebars with 20" embedment for a new pier into an existing concrete footing. Filling joints and voids in masonry. 8620-31) is a commercial grade, high strength, two component structural epoxy with an extended working time of approximately 20 minutes. High Strength Anchoring Epoxy. Grout Where plans or special provisions do not specify a bonding material, a cement paste is to be used as outlined in Section 51- 1.13 of the Standard Specifications. I asked one company if the new patio would tied into existing foundation with dowels or rebar etc. 4" sand cushion 1 / 8" to line and grade and shall and sand shall be compacted to 95% std. Use a drill bit with a diameter that is 1/8-in. Used to brace joints between concrete into the existing reinforcing steel. Grouting bolts, dowels, and rebar into concrete, stone, and masonry. (280 mm) splice. 8 Foot Tee Wall, 12" Thick, Backfill 2-7 Feet, <50% Fines, Machinery Allowed On Non-Structural Slab, And On Soil. 0.00 0.00 It is then filled with a special high strength concrete mix. Learn how to install rebar with an epoxy anchor into concrete using Hilti's standard cleaning method. Once the hole is completely filled with epoxy, put the end of one of your rebar dowels in it. Because its the easiest quickest way to do the form work. I have concerns with him messing with the storm shelter. Fill the hole with epoxy slowly. Vibrate fresh concrete to hold old concrete and ensure fresh concrete has surrounded the bar fully. If the design lane (most heavily trafficked lane) of the roadway has less than 80 trucks per day, dowels are . Use f8 mesh on 60mm 5 chairs. The carport has very good foundations all around, and I'd like to reenforce my concrete slab by tying the rebar into the existing foundation. A concrete pedestal was left at the center of the existing columns. And I'm about 99.9% (unless it is off the ground) sure your house isn't on piles. 4. Is this overkill?-use mesh reinforcement. 10 11 Reinforcing Steel 602 12 13 Epoxy-Resin Adhesive 712.02 14 15 Epoxy Grout 712.04(B) 16 17 Submit test certificates indicating conformance of materials to . A.: In ACI 302.1R-89, "Guide for Concrete Floor and Slab Construction," ACI Committee 302 does not recommend keyed joints for slabs thinner than 6 inches, and also doesn't provide guidance for dowels in slabs thinner than 5 inches. Reply To This Thread Posting in the Eng-Tips forums is a member-only feature. No good. (2) Clean drilling dust, debris, and excess moisture from holes before inserting the epoxy and dowel bar. And then also we're not gonna dowel into the existing driveway, we're just gonna go 6 . 1 . the dowels were placed about 4' apart and into the existing driveway about 2". Accommodate some differential movement longitudinally along the joint. When butting up a new footing to a basement wall, the boss would have us simply knock a hole or two in the cinderblock about 6" round, stuff some ruble into the top of the block below the holes & allow the concrete to flow into the block & drop a piece of rebar in once the concrete level was half way up the hole. Drill through sound concrete compatible diameter to a specified depth as per the specifications of epoxy adhesive and fix the new rebars under a competent person's supervisio. He's calling out for a 6-inch deep concrete, with a 3250-PSI straight cement, and also he's gonna go with wire mesh. 6 reinforcing bars where new concrete is to be joined to existing concrete by means of 7 dowel reinforcing bars grouted into holes drilled into existing concrete. Once sealed within the concrete the air cannot get to the bar and so it will never rust. Insert the tip of the epoxy gun into one hole and pump the trigger. Furthermore, if you're tying into another concrete component -- like a footing or a reinforced concrete wall -- you must use a bit that allows for the placement of the rebar and the anchoring epoxy. The bars may be equipped with hooks or heads on the cast-in end, but are by necessity straight on the post-installed end; b. I would use either 1/2" or 5/8" threaded rod or #5 rebar. Historically, 3/4 inch x 14 inch and 1 inch x 16 inch smooth round dowels spaced at 12 inches on center have been used in construction joints for 5- to 6-inch and 7- to 8-inch-thick slabs (Ref. Just lay a 2X4 on the ground with the 3 1/2" side vertical and boom instant form. Very heavy and massive pieces of concrete will use heavier gauge rebar, but for typical driveway, sidewalk and step repair, ½-inch rebar is usually adequate. Insert the tip of the epoxy gun into the hole as far as you can. This eliminates the need to embed the bar deep enough into the base material to develop the rebar for steel failure. Another rule of thumb for the use of dowels is truck traffic. That solution would be for a monolithic pour on base material compacted to a min. Do remove the grass first. Put a slab next to it. However, the concrete may crack anyway because the bars also . 1) hammer-drill holes sideways into the cut surfaces of the concrete to make holes 3-inch deep for dowels (3/8 rebar that I already have sitting around) 2) remove all loose material from the dirt hole. rebar was used and was 16" square pattern. line 2 ft. curb & gutter section a 2% maximum cross-slope for sidewalk concrete driveway rebar subgrade pvmt. QUIKRETE® High Strength Anchoring Epoxy (No. expansion joint spaced @ 20' o.c. 1) #4 2) Yes, if that gets the rebar into the holes, with the ridges. (2) Clean drilling dust, debris, and excess moisture from holes before inserting the epoxy and dowel bar. Honeycombing reduces concrete strength and durability. This eliminates the need to embed the bar deep enough into the base material to develop the rebar for steel failure. The range of dowel bar length will be 45d to 50d as d is the dia of the bar. Mark the tie bar locations and drill holes into the existing concrete at least 10 in. 8 9 656.02 Materials. I've heard this is good practice as it locks the new slab in with the old so they will heave together. b. A good ICF footing will be at least 11" deep, allowing for 8" of the dowel to be embedded into the concrete (a 4 to 6-inch "L" at . Originally posted by AZ Contractor View Post. Alright in this video we go over the usefulness and time saving of Speed/Slip dowels for your rebar instead of later drilling up to 100 holes into the freshl. Can a rotary hammer drill be used to drill a hole for a #8 rebar 20" deep into existing concrete for a post-installed #8 bar application? Strengthening an existing concrete structure through the use of shear dowels is a primary application of post-installed rebar. 7,500.00 7,500.00 Concrete Celtic will furnish all labor and material to completeabove portion of the project. These dowel bar slots are then chipped out to place a 1 1/4 " dowel bar 15" long in the slots. in Figure 2. Special Provisions will contain a Re: Drilled and Epoxied Rebar Installation. Do remove the grass first. proctor density approved equal. Restraint increases the chance that your slab will crack. I want to pour a 16 x 22 patio from my house foundation (slab) and encasing 3/4 sides of the storm shelter. Efficient use of steel. We've seen metal key forming systems with knockouts for dowels advertised for 3- and 4-inch slabs, but we don't . Would someone explain how to connect the rebar properly? 3) clean rocks and concrete out of the fill dirt. Additionally, dowel rods can be used when looking to reinforce concrete in one horizontal direction, whilst allowing some movement in a direction perpendicular to the initial direction. After holes are drilled into the concrete footing or slab, the holes are cleaned and epoxy injected. Selecting the correct product Use Prime Bond 3000 or Prime Bond 3100 to produce pourable grout for horizontal applications. Rebar dowels are used to brace the joints between two concrete elements. The retrofit begins with cutting of six slots (three in each wheel path) across all transverse joints or cracks. Dowel into existing concrete, spacing maximum - 18". High Strength Anchoring Epoxy-862031 - The Home Depot 4) These look to be primarily shear, so probably 6" embedment is fine. When the rebar is not being used to hold the concrete members together, post-installed anchor theory can be applied. Recommended uses: Interior and exterior. 7. where new sidewalk is placed against existing where new sidewalk is placed against existing sidewalk, saw cut existing sidewalk to an even straight line prior to installation of the new sidewalk install #4 rebar dowel into existing sidewalk. The contractor states he will drill and place rebar dowel every 2 feet into the foundation AND storm shelter. Rebar dowels are used to brace the joints between two concrete elements. I'm getting bids on having a concrete patio poured (approx 600-700sq ft). Non-sag, solvent-free, low odor formula. If the holes in the concrete are at least 1-1/2" Greater concrete bearing area, less stress. For epoxy coating bars having cover less than 3db or clear space between bars less than 6db, use . Figure 9-80 shows the drilling operation being performed at a widening joint. sidewalk joints. 11-22-2006, 09:16 PM. (Dowel rebar into existing concrete) Step: 4 (Install 4,000 p.s.i. Coating rebar. And I'm about 99.9% (unless it is off the ground) sure your house isn't on piles.