Step 5b spread and texture the concrete patch to match the surrounding concrete. Defining concrete repair, as published in concrete construction, april 2016 new code sets standards for concrete repair. A concrete mixture ratio of 1 part cement, 3 parts sand, and 3 parts aggregate will produce a concrete mix of approximately 3000 psi. The concrete repair association was also represented on a working party of the concrete society to produce a comprehensive model specification document for patch repair to reinforced concrete, being an update of an earlier document, and this included a section on measurement of repairs and was first issued in 1991. Its possible to expect a 20 30 year life expectancy from a properly executed repair. Stir concrete patching compound using a margin trowel or putty knife.
Development of a con crete repair code was a key goal of the vision 2020 2 program which identified strategies to improve the concrete repair. Permanent concrete repairs are possible, well, nearly permanent. Standard reinforced concrete box culvert single 3ft x 2ft to single 6ft x 6ft for depths of fill up to 20 ft sheet 2 standards,culverts,drainage,drainage structures 1112001. Unique high performance fast set mortar is a commercialgrade, rapidsetting concrete repair material for patching concrete surfaces. It provides excellent workability and greater coverage than standard concrete, while also delivering high strength for a variety of concrete applications. Even the american concrete institute has no standards or recommendations that give a yes or no answer as to what cracks need repair based on width and other factors. It is a professionalgrade blend of portland cement, sand and gravel that is formulated for superior durability. This guide first discusses reclamations methodology for concrete. Use concrete with at least 3,000 psi and good adhesion. For more than a century, architects and engineers have referenced two documents to design safe, durable structures. Pressure wash the concrete, working in one direction so the debris will flow in one.
Concrete structures commentary supplement to as 36002009 guide to concrete repair. Prior to patching, sample cores of existing concrete. Once a few more crystals grow, the concrete can be finished with a steel trowel. The american concrete institute aci is a leading authority and resource worldwide for the development and distribution of consensusbased standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete. It is recommended that investigation into soundness of pavement be. Development of a con crete repair code was a key goal of the vision 2020 2 program which identified strategies to improve the concrete repair practice. If you use a readymix concrete patch, all you need to add is water. In general, cracks wider than a credit card and running through the depth of the concrete are structural in nature and could be a sign of more serious problems see concrete. Proper design and implementation of concrete repairs. It is a biobased, nonhazardous, extremelylow voc product primarily used as a component of an expansion joint assembly either to fill blockouts on each side of an expansion joint gap, to repair. Astm standards for concrete repair astm international. Five star products structural concrete concrete repair. Concrete repair guidelines concrete repairs can be broken down into four basic types, plus special repairs and planing. Placing silica fume concrete to repair a spillway floor damaged by cyclic freezing and thawing and.
Power epoxy patch kits are available in brown or grey below. Water used in mixing and curing of the concrete repair shall be clean and free from injurious amounts of oil, salt, acid, alkali, organic matter, or other deleterious substances. How to patch and resurface concrete steps howtos diy. International concrete repair institute icri technical guideline no. To reduce the risk of shrinkage cracks, use sakrete crack resistant concrete mix for projects with concrete. For small patching jobs, use a premixed concrete patch. One of the central problems in dealing with concrete is making repairs that will not fail prematurely. Concrete repair standards and approvals to european standards. Cement standards and concrete s tandards astms cement and concrete standards are instrumental in the evaluation and testing of concrete, cement, and aggregates. Defining concrete repair concrete construction magazine. This is done by gently swirling a wood float, block, or magnesium trowel over the stiffening concrete.
Patching compound shall be an acrylic polymer modified blend of portland cement, specially graded aggregates and admixtures, designed for low shrinkage, low stress cure, and compatibility with existing host concrete. Aci introduces specifications for repair and rehabilitation. Mixing water with the cement, sand, and stone will form a paste that will bind the materials together until the mix hardens. In 20, aci took the first step toward standardizing repair and rehabilitation by releasing aci 56216 code requirements. Before aci 562, work done to existing structures was sometimes held to standards for new construction. Use sakrete 5000 plus high strength concrete mix for repair and building projects where concrete thickness is 2 inches or more and demands excellent strength. In order to make concrete repair more reliable, astm committee c09 on concrete and concrete aggregates has created the newly approved astm standard, c 1583, test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair. Only one brand of any type of cement shall be used in any single repair as defined in section 18.
There is no such thing as a standard concrete repair. Concrete epoxy patch kits floor ramp concrete patch. In order to make concrete repair more reliable, astm committee c09 on concrete and concrete aggregates has created the newly approved astm standard, c 1583, test method for tensile strength of concrete surfaces and the bond strength or tensile strength of concrete repair and overlay materials by direct tension pulloff method. Five star products is an iso9001 certified manufacturer of precision nonshrink cement and epoxy grouts, concrete restoration materials, coatings and adhesives, cementitious, grouting, grout, fast set cement, rapid set cement, adhesives, epoxy, concrete, concrete repair, patching, waterproofing, crack repair. It is designed to serve as a companion document to the standard specifications for repair of concrete included in appendix a of this guide. Concrete repair specifications section 33 edison coatings. Click the link below and get directions to your closest sherwinwilliams store. When this publication, entitled standard specifications for roads and structures, dated january 2018, is incorporated by reference into the departments construction bid proposals or contracts. An elastomeric concrete nosing material, emcrete is flexible, durable, impact resistant. Concrete repair material shall have the following salient features. Once you have a good, sticky surface for the concrete, simply add water to premixed concrete and patch the crack. The procedures used to evaluate cracking in concrete and the principal techniques for the repair of cracks are presented. Concrete repair and repair products the concrete network.
Repair material, processes, and procedures are seemingly limitless. Concrete can have different properties depending upon the mixture that is used in creating it, which contains cement, chemical admixtures, and aggregates. Cement standards and concrete standards astms cement and concrete standards are instrumental in the evaluation and testing of concrete, cement, and aggregates. If you desire a smooth, steel trowel finish, you must first finish the surface and achieve a sand finish. Aci 56216 was developed to be integrated with the current us general building codes for existing structures. Select from products offering extending working time to rapid setting concrete repair and concrete patch products designed for quick pedestrian or vehicle traffic. In november 2018, the organization completed the process by releasing aci 56318, specifications for repair of concrete. The trick to a longlasting concrete repair lies in bonding the new material to the old material. With the en 1504 a new european standard on protection and repair of concrete structures. Concrete patch and repair compounds products laticrete. Causes, evaluation, and repair of cracks in concrete structures reported by aci committee 224 aci 224. The concrete repair manual is referenced in several 2014 standard specification items. This sec tion includes a list of each of those references, along with the corresponding section to reference. This page provides an overview of the repair procedures for use on new and existing concrete members cast for txdot.
American concrete institute aci 318 code requirements and aci 30116 specifications. Basics of concrete repair and structural strengthening sprayed. Repair specific standards save money, and historic structures. Fast patch concrete repair simply mix with water and trowel. Replacement concrete repair material shall be a material that consists essentially of a binding medium of port land cement and water that will meet all the. Concrete repair standards and approvals in accordance with european standards en1504 parts 1 to 10. Tape off the edges where you dont want new concrete. Systematics of concrete repair according to en 1504.