ASTM C – 07 Standard Test Method for Potential Alkali-Silica Reactivity of Aggregates (Chemical Method) – Download as PDF File .pdf), Text File .txt) or. All the Controls products ASTM C standard. Enter now!. ASTM C Standard Test Method for Potential Alkali-Silica Reactivity of Aggregates (Chemical Method). Lab ID: Use A rapid indication of potential alkali.
Store the solution NOTE 2—In selecting the container, take care to ensure that the reagent will not be modified by reaction with the material composing the container, including pigments or other additives, or by transpiration of phases through the walls of the container. The astm a is a type, complicated for studies, events and other description weeks.
The 4 C — 03 method is particularly applicable to rapid control analysis of crystalloidal silica below 10 ppm. Use a porcelain Gooch crucible see Note 4 with a disk of rapid, analytical-grade filter paper cut to fit the bottom of the crucible, setting the crucible in a rubber crucible holder in a funnel.
Astm c 07 standard test method for potential alkali. The error introduced by calcium carbonate is not significant unless Sc and Rc values indicate the potential reactivity is marginal.
A specific precautionary statement is given in 5. Lithium hydroxide is a chemical admixture that effectively controls ASR. PART I At present, there is little practical guidance regarding the aatm of potential alkali-aggregate reactivity given in the various national standards.
Astm c 14 standard test method for potential alkali. Two problems often occur: The best way to control F289 is to ensure that you are not using reactive aggregates. A container that has been found suitable is shown in Fig. Astm b 04 pdf free download astm international. These should include full-face shields, rubber aprons, and gloves impervious to HF.
Even though aggregates may contain reactive forms of silica, astn will be no alkali-silica reaction if the alkali content of the cement is low, or if the finished concrete product is not exposed to excess moisture. Seal the four containers and gently swirl them to liberate trapped air.
These aggregates should be considered to indicate a potentially deleterious degree of reactivity until the innocuous character of the aggregate is demonstrated by service records or by supplementary tests in accordance with the provisions of Test Methods CCor Cas applicable. C — 03 Standard Test Method for Potential Alkali-Silica Reactivity of Aggregates Chemical Method 1 This standard is issued under the fixed designation C ; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision.
Other containers, made of corrosion-resistant material such as polyethylene, may be suitable. A 90a90m test method for weight mass of coating on iron and steel c2289 with zinc or zincalloy coatings2 a am specification for steel, sheet, carbon, and highstrength, lowalloy, hotrolled and coldrolled, 1 this specification is under the jurisdiction of astm committee a05 on metallic.
Reactive forms of silica in the aggregate High-alkali pore solution Sufficient moisture Even though aggregates may contain reactive forms of silica, there will be no alkali-silica reaction if the alkali content of the cement is low, or if the finished concrete product is not exposed to excess moisture.
ASTM-C-289-Potential Alcali-Silice Reactivity of Aggregates.pdf
Crush or grind the sample in small portions using a disk pulverizer, rotary mill rotatingpuck device, or mortar and pestle. Protect the dry reagent and solution from contamination by carbon dioxide. We need your help to maintenance c89 website. Reduction in Alkalinity Transport Research Laboratory Files: E57 3d imaging format reference implementation of the astm 3d imaging format.
Alkali Silica Reaction – Proactive Avoidance
Astm c standard test method for potential alkalisilica reactivity of aggregates chemical method standard number.
ASTM C Standard
Containers with wall thickness not less than 0. Read the concentration of silica in the solution directly from the previously prepared calibration curve correlating transmission of light of this wave length with silica concentration.
If the solution is c89 clear, filter through a fine-texture paper. To a fourth reaction container, by means of a pipet, add 25 mL of the same NaOH solution to serve as a blank. Record the total amount of time during which the vacuum is applied as the filtration time; make every effort to achieve an equal filtration time for all samples in a set, by uniformity of procedure in the assembly of the filtration apparatus and the packing of the solids in the crucible.
A potentially deleterious degree of alkali X1.
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Last previous edition approved in as C — Some form of petrographic examination is essential; it can often obviate the need for any further testing, and it will identify the most pertinent sequence of tests required and help in the correct interpretation of results. Ast you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
Other grades may be used, provided it is first ascertained that the reagent is of sufficiently high purity to permit its use without lessening the accuracy of the determination. Reserve this diluted solution for the determination of the dissolved SiO2 and the reduction in alkalinity.
Store the solution in a polyethylene container see Note 2. Without heating the residue further, treat it with 5 to 10 mL of HCl 1. With the aspirator in operation or the vacuum line open, decant a small quantity of the solution onto the filter paper so c2889 will seat properly in the crucible. The astm charges so every site that offers pdfs also charges. Dilute the solution with an equal volume of hot water, filter immediately through quantitativegrade, low—ash filter paper, and wash the separated silica SiO2 thoroughly with hot water see Note 5 and reserve the residue.