Building curved forms for a sidewalk or other concrete project is not much harder than building straight forms, and the results are definitely more interesting. This initial marking cut need be only a few millimetres deep, as this is just a surface scoring, indicating the limit of removal, and not a major line of weakness. This basic division is better explained in the diagram below, which shows a fairly simple patio layout that incorporates both versions. Each cut is made in turn, and the sequence is shown in the diagram. If the arc line projects outward, the task of cutting pavers convexly is easier than cutting concave curves. The arc has been scribed onto the flag and is shown in orange. The area where the pavement should be placed needs to be clearly marked. Creating a design with pavers requires planning. In general, joint spacing to control drying and thermal shrinkage in industrial slabs should range from 12 to 20 feet in unreinforced and lightly reinforced concrete floors. Check inside radius, outside radius, paver width and other dimensions before cutting and using templates to mark and cut the pavers. A curved edge or circle is usually accomplished by spacing the pavers close together near the center and gapped slightly more at the farthest point from the center of the circle. Remember that you can't actually cut curves with the saw. External arcs are cut as a series of straight lines, each successive line at a slightly skewed angle, so the result is not actually a true arc. If the area is to have some straight lines, use an edge restraint to clearly mark them. But with a straight cutter blade, you may need to draw 3 or 4 straight lines to follow, using the curve as the guide. You can also cut pavers at an angle to achieve a tighter joint in a circle layout. I've got a curved design in mind for a client and they like porcelain paving . Two chords are scribed, joining the points where the arc intersects the edges of the flags and the centre line of the flag. Take a chisel and scratch out the line you need to cut. This page looks at the techniques we commonly use for this task. Cut joints deep enough Cut joints 25% of the depth of the slab. However, there is a limit: once a cut edge is less than around 50mm in length, it becomes difficult to justify the extra work involved in making additional cuts. I was oblivious to everything until the lady next door opened my side gate & walked right up to me to complain. In addition to the concrete mix and the weather conditions, determining when to saw concrete is based on the concrete's hardness as well as the type of cutting equipment used to make the saw cuts. However, the curves will be faster and the hose would need to have greater flexibility. Lay out the curves. Place joints under walls or under carpet areas Its dawned on me that I've been asked absolutely thousands of questions by thousands of people. It should be obvious that four cuts are needed to produce the shape and size of flag shown above. Spraying the pavers with lacquer can protect the guide line while cutting. You may have reached the end of your walkway, for example, and the area only requires a slab half the size of what you used on the rest of the walkway. The 1st I knew was when her both our dogs started jumping over eachother next to me while I still had the saw running. This can be tricky but there are a few ways to make it a little simpler. The time when the concrete slab is saw-cut to make control joints is an important aspect for the efficient use of control joint. Place the chisel and strike it with the hammer over the length of line. A concrete floor is designed to be sturdy and strong, and take a lot of abuse. There are a couple of methods that can be used to cut true, or true-ish, arcs, and these are described later in this section, but the vast majority of internal arc cuts rely on cutting short, straight lines. It should be noted that these convex blades (also known as radius blades or radius cutting blades) are not suitable for full depth or 'plunge' cutting: their shape precludes penetration deeper than a few millimetres, and so additional cutting may be necessary, much as described above, to create weaknesses that can be exploited to reduce the flag to the required curved line-of-cut. Step 2 - Cut the paver. When laying the pavers down, mark the curve lines on them. Internal curves are those that bite into the body of a flag (or pavement), what might be called 'concave' in another discipline, while external curves are those that project outwards from a flag (or pavement), convex, in other words. However, if we abide to this 'intersection and no further' rule, because of the curvature of the cutting blade, it's not possible to create a complete all-the-way-through cut: there will be a portion of the flag cross-section that just cannot be cut without extending the cut line too far, as shown in the diagrams below, which show a simple, two-line cut with just one intersection. Please read Email FAQ before sendingemails, questions, photos, etc. Here at Landscaping Supplies Direct, we stock a stunning selection of paving circles in a wide range of colours and styles, using high quality stone every time. Factors such as concrete mix, weather conditions, hardness of concrete and types of machines used for making the control joints determine when to cut the concrete slab.When the concrete is sawed with the help of blade before it has reached its initial setting time, the aggregates may strew out of the concrete slab and leave a messy, weakened edge along the joint. When designing patios, walkways or other types of hardscapes with paving slabs, there invariably comes a point when you must cut a slab to fit into a given area. If you spot any glaring errors or cock-ups, please let me know...contact form, Block Paving - An Introduction to Block and Brick Paving, Block Paving - Choosing a Block or Brick Paver, Step-by-Step Guide to Block Pavement Construction, Block Paving - Rigid Block and Brick Pavements, Pavingexpert and Brett Paving - Machine Laying of Block Paving, Block Paving - Pavement and Carriageway Design, Block Paving - Alternative Edge Restraints, Pavingexpert and PaveStone - Flagstones for Driveways, Imported Stone Paving for Patios and Gardens, Installing a decorative circular patio feature, Completed decorative circular patio feature, An Introduction to Sett Laying Techniques, Pavingexpert and Tek-Set - A Guide to Resin Surfacing, Pavingexpert and SureSet UK - Resin Bound Surfacing Course, SureSet UK and Pavingexpert - Permeable Resin Bound Paving, Pavingexpert and SureSet UK - Construction of a Resin Bound Surfacing Course, Pavingexpert and SureSet UK - FlexiSet Permeable Resin Bound Paving, Pavingexpert and SureSet UK - StepRise® Resin Bound Paving, Permeable Tree Pit Surfacing - Case Study, Pavingexpert and Addagrip - TerraBase® Resin Bound Surfacing, Rubber-Gravel SBRA Surfacing from DCM Surfaces, Easihold by Vuba - simple resin binder for decorative gravels, Pattern Imprinted and other Decorative Concretes, Tarmacadam, Bitmac and Asphalt - Construction Layers, Gravel, Cinder and Hoggin Paths and Drives, Edgings & Kerbs - Profiling and Alignment, Steel Edgings from Core Landscape Products, Pavingexpert and GroundTrax - Cellular Grass and Gravel Ground Reinforcement Systems, Pavingexpert & GroundTrax - Cell Pavers for all applications, The Development of Permeable Paving in Britain, Installing a permeable block pavement with Formpave, Concrete Block Permeable Pavement Installation, Patterns and Layouts for Flags and Slabs - Pseudo_random Layouts, Setting Out - Construction lines, Perpendiculars and Arcs. Lay on the pavers as though filling a square or rectangle. Hence, you need the help of the expert in paver cutting services. Arcs with larger radii ( slow arcs ) may be cut as true arcs, as it is possible to 'twist' the blade of the saw to a small degree as it traverses the flag(s). An example is a curved garden path through a lawn area or around flower beds. If necessary, make additional vertical cuts through the unwanted section, but be careful to ensure the blade does not cut into the surface of the flag. This is because the blade can be adjusted gently to match the curve line. One of these flags is a 600mm wide piece, and this is shown in the accompanying illustration. The narrow gaps between the pavers should be filled with sand and then compacted using a power tamper. FAQ - Is a concrete base better than a sub-base beneath block paving? The shape will appear curved, however, when all the pavers have been set. These are the convex (external curve) and the concave (internal curve). As long as these cuts are full depth (or nearly so) and they divide the discard section into relatively narrow strips, the shallow surface scoring will be sufficient to focus the breaking forces and ensure the flag snaps where required, and nowhere else. When cutting flags to relatively fast arcs, the size of the saw blade can make it difficult to achieve short-length cuts. As described above, when a line of cut extends over two or more flags, a better finish will be achieved by marking the arc onto the flags once all of them are in place. As you lay the furthest pavers, etch the curves over them. How to Measure the Cut. I was once cutting a load of paving slabs in half with a stone cutting disc in a circular saw. Instance, convex on the left side will juxtapose concave on the ground a... Was once cutting a load of paving slabs with a certain amount of.... 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