AASHTO T 119 - SLUMP OF HYDRAULIC CEMENT CONCRETE Conduct this procedure according to AASHTO T 119. Consult the current edition of AASHTO for procedure in its entirety and equipment specification specification details. SCOPE A sample of freshly mixed mixed concrete concrete is placed placed and compacted compacted by rodding in a slump cone. The mold is raised and the concrete alloed to slump. The distance beteen the original and displaced position of the center of the top surface is measured and reported as the slump of the concrete. The slump measurement is used as an indicator of consistency. This test is not considered applicable to non!cohesi"e #slumps greater than 9$ or %&' mm( and non!plastic #slumps less than 1)%$ or 1* mm( concrete or concrete batched ith coarse aggregate o"er 1+$ #&, mm( in si-e. REFERENCED DOCUMENTS AASHTO T 11/ Sampling 0reshly 0reshly ixed ixed Concrete APPARATUS Slump cone and base plate/ or non!absorbent/ rigid/ flat surface Tamping rod/ %$ #2'' mm( length/ and *),$ #12 mm( diameter/ rounded to a hemispherical tip Scoop 3uler Sponge or brush TEST SPECIMEN Obtain a concrete sample according to AASHTO T 11. Test must be started ithin fi"e minutes of obtaining the final portion of the composite sample. The entire test from the start of the filling through remo"al of the mold must be completed/ ithout interruption/ in %+ minutes PROCEDURE 4ampen the mold and place it on a le"el nonabsorbent rigid surface or the base plate pro"ided ith the cone. Hold mold in place by standing on the %!foot pieces or by clamps if using a base plate. 5mmediately fill the cone in three layers. 6ach layer should be approximately 1)& the "olume of the cone. One third is approximately %!*),$ #2* mm( depth7 to thirds is approximately 2!1),$ #1** mm( depth. o"e each full scoop around the top edge of the cone as the concrete slides from it to ensure e"en distribution of the concrete ithin the cone. Consolidate each layer of concrete %* times ith the tamping rod/ rounded end don. 4istribute the stro8es in a uniform manner o"er the cross section of the cone. 5ncline the rod slightly to reach the perimeter. 4istribute approximately half the stro8es near the perimeter and progress to "ertical stro8es toard the center. se a spiral pattern. Tamp the bottom layer through its full depth. 0ill the second layer. Consolidate %* times ith the tamping rod. 3od the layer through its full depth and :ust penetrate the first layer.
0ill the final layer. ;eep the concrete abo"e the top edge of the mold at all times hen rodding the third layer. Add additional concrete if needed and continue rodding. 3od through the layer but :ust penetrate the pre"ious layer. After the consolidation of the top layer has been completed/ stri8e!off the surface of the concrete ith the tamping rod using a screeding and rolling motion. Continue to hold mold don firmly and remo"e any excess concrete from the area surrounding the base of the mold.
AASHTO T 154-06 - TIME OF SETTING OF HYDRAULIC CEMENT PASTE AASHTO 4esignation> T 1*!'2 AST 4esignation> C %22!' SCOPE
This test method co"ers the determination of the time of setting of hydraulic!cement paste The "alues stated in S5 units are to be regarded as the standard. The "alues gi"en in parentheses are for information only. This standard may in"ol"e ha-ardous materials/ operations/ and equipment. This standard does not purport to address all of the safety problems associated ith its use. 5t 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. ?arning> 0resh hydraulic cementitious mixtures are caustic and may cause chemical burns to s8in and tissue upon prolonged exposure. The use of glo"es/ protecti"e clothing/ and eye protection is recommended. ?ash contact area ith copious amounts of ater after contact. ?ash eyes for a minimum of 1* minutes. A"oid exposure of the body to clothing saturated ith the liquid phase of the unhardened material. 3emo"e contaminated clothing immediately after exposure. The text of this standard references notes and footnotes hich pro"ide explanatory material. These notes and footnotes #excluding those in tables and figures( shall not be considered as requirements of the standard. REFERENCED DOCUMENTS AASHTO Standards>
@ %'1/ oist Cabinets/ oist 3ooms/ and ?ater Storage Tan8s sed in the Testing of Hydraulic Cements and Concretes @ %1'/ se of Apparatus for the 4etermination of
@ T 12%/ echanical ixing of Hydraulic Cement astes and ortars of lastic Consistency ASTM Standards>
@ C 2B'/ ractice for reparing recision Statements for Test ethods for Construction aterials @ C 1''*/ Specification for ?eights and ?eighing 4e"ices for se in the hysical Testing of Hydraulic Cements
@ 4 119&/ Specification for 3eagent ?ater APPARATUS
Flat Trowel, ha"ing a sharpened straight!edged steel blade 1'' to 1*' mm # to 2 in.( in length. Mixer, Bowl, Paddle, and Scraper Dconforming to the requirements of T 12%. Glass Graduates, %'' or %*' m< capacity/ conforming to the requirements of %1'. Mass Determining Devices, conforming to the requirements of AST C 1''*. The de"ices for determining mass shall be e"aluated for precision and bias at a total load of 1''' g. Plane on!A"sorptive Plates, 1'' mm = * mm # = '.19B in.( square/ of similar planeness/ corrosi"ity/ and absorpti"ity to that of glass #see T 1%9 0igure 1/ item H(. eedles, conforming to the folloing requirements>
The initial time of setting shall ha"e a mass of 11&. = '.* g #'.%*' = '.''1 lb( and a tip diameter of %.1% = '.'* mm #'.', = '.''% in.(. The final time of setting needle shall ha"e a mass of *&.2 = '.* g #1.''' = '.''1 lb( and a tip diameter of 1.'2 = '.'* mm #'.'% = '.''% in.(. The needle tips shall be cylindrical for a distance of ., = '.* mm #'.1,9 = '.'%' in.(. The needle ends shall be plane and at right angles to the axis of the rod and shall be maintained in a clean condition
SUMMARY OF TEST METHOD Sufficient ater is added to the cement that is being tested to produce a paste of normal consistency. A specimen is molded from this paste and is tested for time of setting by means of the initial and final needles. The initial time of setting is the time required for the test specimen to bear the initial needle ithout appreciable indentation/ hile the time required for the test specimen to bear the final needle ithout appreciable indentation is the final time of setting. PROCEDURE Preparation o# $ement Paste >
Obtain the cement paste used for determination of the time of setting from one of the folloing methods> repare a ne batch of paste by mixing 2*' g of cement ith the percentage of mixing ater required for normal consistency #T 1%9(/ folloing the procedure described in T 12%. At the option of the tester/ use the paste remaining from the batch used for the autocla"e expansion specimen #T 1'B( or from the normal consistency determination #T 1%9(. Molding Test Specimen D0rom the cement paste/ ma8e a pat approximately B2 mm #& in.( in diameter and approximately 1& mm #'.* in.( in thic8ness at the center ith a flat top and tapering to a thin edge on a clean plane non a"sorptive plate. 5n molding the pat/ flatten the cement paste first on the glass and then form the pat by draing the troel from the outer edge toard the center/ then flattening the top. After ma8ing/ place the pat in the moist cabinet or moist room and allo it to remain there except hen the determinations of time of setting are being made. Time o# Setting Determination D4etermine the time of setting by holding the needle in a "ertical position and lightly applying it to the surface of the pat.
AASHTO T 22 – COMPRESSIVE STRENGHT OF CYLINDRICAL CONCRETE SPECIMEN
SCOPE This test method co"ers determination of compressi"e strength of cylindrical concrete specimens such as molded cylinders and drilled cores. 5t is limited to concrete ha"ing a unit eight in excess of *' lb)ft& #,'' 8g)m&(. The "alues stated in 6nglish units are the standard. This standard may in"ol"e ha-ardous materials/ operations/ and equipment. This standard does not purport to address all of the safety problems associated ith its use. 5t is the responsibility of hoe"er uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Warning: eans should be pro"ided to contain concrete fragments during sudden rupture of specimens. Tendency for sudden rupture increases ith increasing concrete strength #ote 1(. Note 1: The safety precautions gi"en in the anual of Aggregate and Concrete Testing/ located in the 3elated aterials section of Eolume '.'% of the Annual Foo8 of AST Standards/ are recommended.
The text of this standard references notes hich pro"ide explanatory material. These notes shall not be considered as requirements of the standard . REFERENCED DOCUMENTS AASHTO Standards 3 &9 G a8ing and Curing Concrete Test Specimens in the
APPARATUS ST! ni"ersal Testing achine SUMMARY OF TEST METHOD This test method consists of applying a compressi"e axial load to molded cylinders or cores at a rate hich is ithin a prescribed range until failure occurs. The compressi"e strength of the specimen is calculated by di"iding the maximum load attained during the test by the cross!sectional area of the specimen.
PROCEDURE
Compression tests of moist-cured specimens shall be made as soon as practicable after removal from moist storage. Test specimens shall be kept moist by any convenient method during the period between removal from moist storage and testing. They shall be tested in the moist condition.
All test specimens for a given test age shall be broken within the permissible time tolerances prescribed as follows: Tes A!e
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= '.%* h or %.1
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= '.* h or %.1
& days
I % h or %.,
B days
I 2 h or &.2
%, days
I %' h or &.'
*2 days
I ' h or &.'
9' days
I % days %.%
