This Book have some digital formats such us: epub, paperbook, kindle, . ASTM A reinforcing steel being placed for the Willamette River. ebook, epub, kindle, and another formats. revised to allow a chemical wash for surface preparation ASTM A A75M revised to allow a chemical wash. Examples of differing requirements are: The ASTM A/AM diccionario de filosofia nicola abbagnano gratis (PDF, ePub, Mobi).
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b Epoxy-coated reinforcing bars shall conform to ASTM A /A M or ASTM A /A M as specified in the Contract Documents. Coatings shall be. ASTM AAMa Standard Specification for Epoxy-Coated Steel Reinforcing Bars_建筑/土木_工程科技_专业资料。ASTM系列标准规范. ASTM A - Download as Word Doc .doc), PDF File .pdf), Text File .txt) or read online.
Pull-off or xed probe gages shall be used. NOTE 9—Hand-held holiday detector checks should be performed each production day to verify the accuracy of the in-line system.
Hand-held holiday detectors offer a reliable way to correlate data obtained from the in-line holiday-detection system.
Requirements for Coated Steel Reinforcing Bars 8. The upper thickness limit shall not apply to repaired areas of damaged coating.
The average applies to the full production length of a bar. The two longitudinal ribs shall be placed in a plane perpendicular to the mandrel radius. The bend test requirements in Table 1 for evaluating the coating exibility of production-coated steel reinforcing bars, for bar sizes Nos.
Finished bend diameters for bar sizes Nos. Thus, the nished bends of productioncoated bars, particularly the smaller bar sizes used for stirrups and ties, should be examined closely for hairline cracking on the outside radius of the bent bar. If hairline cracking is present, it should be repaired with patching material. NOTE 13—If the amount of repaired damaged coating in any 0. In patching damaged coating , care should be taken not to apply the patching material over an excessive area of the intact coating during the repair process.
Too large an area of thick patching material especially on smaller-size reinforcing bars is likely to cause a reduction in bond strength of the bars to concrete. Data from testing pertaining to the coated steel reinforcing bars being furnished shall be made available to the purchaser upon request. NOTE 11—It is recommended that the manufacturer retain test specimens for 30 days of production and use a 30—day rolling average of coating disbondment test data as a basis for its statistical process control program for the steel reinforcing bar coating operation.
Coated steel reinforcing bars shall not be ame cut. Inspection The manufacturer shall afford the inspector all reasonable facilities to satisfy the inspector that the coated steel reinforcing bars are being furnished in accordance with this specication. All tests and inspection shall be made at the place of manufacture prior to shipment, unless otherwise specied, and shall be so conducted as not to interfere unnecessarily with the operation of the coating line.
Rejection Number of Tests 9. NOTE 12—The coated steel reinforcing bars to be tested for coating adhesion should be selected from the bar sizes being coated and from positions on the production line so as to be representative of the overall coating process. Retests If the results of both retests meet the specied requirements, the coated steel reinforcing bars represented by the samples shall be accepted.
This limit on repaired damaged coating shall not include sheared or cut ends that are coated with patching material see Certication When specied in the purchase order or contract, a report of the test results shall be furnished.
Handling and Identication All bundling bands shall be padded or suitable banding shall be used to prevent damage to the coating. The bars or bundles shall not be dropped or dragged. If the manufacturer stores coated steel reinforcing bars outdoors without protective covering, the date on which the coated bars are placed outdoors shall be recorded on the identication tag on the bundled steel. Coated steel reinforcing bars, whether indivdual bars or bundles of bars, or both, shall be covered with opaque polyethylene sheeting or other suitable opaque protective material.
For stacked bundles, the protective covering shall be draped around the perimeter of the stack. The covering shall be secured adequately, and allow for air circulation around the bars to minimize condensation under the covering.
Keywords The ngerprint and generic description shall become an integral part of the qualication test report. The product name and a description of the patching material shall be given in the test report. The lms shall be at least mm by mm [4 in. The coated steel reinforcing bars shall have their ends sealed with patching material.
The coated bars shall be checked for holidays using a The total number of holidays found on the bar specimens tested shall be reported. These procedures shall be listed in the test report.
NOTE A1. Therefore, it is necessary that the qualication bars be prepared in the manner proposed for production. Variations in the critical preparation, thermal treatment, and coating procedures known to be allowable without a compromise in quality should also be detailed in the qualication report.
Specimens without holidays and specimens with intentional holes drilled through the coating 6 mm [0. Minimum test time shall be 45 days.
The coating must not blister, soften, lose bond, nor develop holidays during this period. The coating surrounding the intentionally made holes shall exhibit no undercutting during the day period. The intentional coating defect shall be placed approximately 50 mm [2 in. It shall be drilled just deep enough to expose a full 3 mm [0.
The test bar shall be inserted with the sealed end of the bar resting on the bottom of the test vessel and electrolyte added until mm [4 in] of the bar length is submerged. The average coating disbondment radius of three coated steel reinforcing bars shall not exceed 4 mm [0.
Three intentional 3 mm [0. The test specimens shall be allowed to cool for approximately 1 6 0. The average coating disbondment radius of nine test sites on three coated steel reinforcing bars shall not exceed 3 mm [0. The permeability cells shall be of the type shown in Fig. Films selected for testing shall be carefully handled and examined for any defects prior to installation in the cell.
The cell shall consist of two glass compartments serparated by a coating lm sandwiched between two glass plates, each having a centered 25—mm [1—in. One compartment shall contain mL [5. The activity of chloride ions passing through the lm shall be measured using a specic ion meter equipped with a chloride electrode and a double junction reference electrode. Activity measurements shall be converted into concentration values of mole per L [M] with a conversion diagram, constructed by plotting measured chloride ion activities versus known chloride ion concentrations.
The accumulative concentration of chloride ions permeating through the lm shall be less than 1 3 M. The bend shall be made at a uniform rate and completed within a s time period. The bars shall be bottom-cast and shall have a cover of 40 6 2 mm [1. Test bars shall be oriented so that the longitudinal ribs and direction of rolling, relative to the direction of the applied tension, are the same for coated and uncoated bars.
The test bars must be pulled in the same direction with respect to the direction of rolling. Three to six coated bar specimens and three to six uncoated bar specimens shall be tested. All steel reinforcing bars in a test group shall be from the same steel heat.
Finally, astm a test shall be astm a on the pipe in accordance with, electric-resistance-welded pipe, and furnace-welded pipe. Each length of pipe shall astm a subjected to a hydrostatic test without leakage through the pipe wall.
Link to Active This link will always route to the current Active version of the standard. It is astm a only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. Pipe having other wall thicknesses may be furnished asgm such pipe astmm with astm a other requirements of astm a specification and the outside diameter is as given in Table 2. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
The steel shall conform to the required chemical composition. This abstract is a brief summary of the referenced standard. Combining values from the two asrm may result in non-conformance with the standard.
The pipe may be bent, but it is not intended for bending astm a at ambient temperature wherein the inside diameter of the bend is less than twelve a the outside diameter of the pipe being bent.