ASTM C702

CCIL

/ LABORATORY INSPECTION CHECKLIST

Standard Standard Practice fo r Reducing Samples Samples of Aggregate to Testing Size  ASTM C702 – 98 (Reapp ro ved 2003)  APPA RATUS RATU S 1. Mechanical Splitter (Me Splitter (Method thod A) / Clause 7.1 a.

For Coarse Aggregate and Mixed Aggregate -

b.

For Fine Aggregate (Dry Sample / P/9.5 mm) -

c.

Not less than 8 chutes …………………………………………… ……………………………………………………… ………… ____ Minimum width width of individual chutes to be approximately 50 % larger than the largest particles in the sample to be split …………………………… …………………………… ____

Not less than 12 chutes ………………………………………………… ……………………………………………………. …. ____ Chutes 12.5 to 20mm wide shall be used ……………………………….. ____

For CA & Mixed Mixed Aggregate / For Fine Aggregate -

-

Equipped with a hopper or straight edge pan (feeder pan) which has a width equal to or slightly less than over-all width of the assembly of  Chutes ……………………………………………………………………….. ____ Receptacles (catch pans) to hold the 2 halves of split sample sample ………... ____

2. Equipment to be used for Quartering Procedure (Method (Method B ) / Clause 9.1 -

Straight-edged scoop, shovel, or trowel ………………………………….. ____ Broom or brush ……………………………………………… ……………………………………………………………… ……………… ____ Canvas blanket for alternative for alternative procedure – approx. 2 x 2.5 m ( 6 x 8’) ____

SELECTION OF METHOD a.

For Coarse Aggregate and Mixtures of Coarse and Fine Aggregate / Clause 5.2 -

Sample reduced using mechanical splitter (Method A / Preferred Method) or by quartering (Method B) ……………………………………………….. ……………………………………………….. ____ Note 1: Method C not permitted For CA and mixtures of CA & FA (Refer to  ASTM C702 / Clause 11 & 12).

b.

For Fine Aggregate / Clause 5.1 to 5.1.2 -

Sample less than saturated-surf ace-dry (free flowing) use mechanical splitter  according to Method A ……………………………………………………..  ____ Note 2: If sample is too wet, and Method Method A is preferred, dry entire sample to at least the SSD condition at a temperature not exceeding those specified by any test.

-

Moist material (wetter than saturated-surface-dry) reduced by quartering (Method (Method B) ……………………………… …………………………………………………………………... …………………………………... ____ Note 3: FA Aggregate will retain its shape shape (molded in hand) if wetter than SSD.

Page 2 Standard Practice fo r Reducing Samples of Aggregate to Testing Size  ASTM C702 – 98 (Reapp ro ved 2003)

SAMPLING a. Obtained samples in accordance with Practice D75 or as required by individual test methods? ……………………………………………………………………………… ____

PROCEDURE: Method A / Clause 8.1 a. b.

Distribute sample uniformly into feeder pan from edge to edge? ……………… ____ Introduce sample from feeder pan into feed chute at a rate that will permit the material to flow freely through the chutes, so that approximately the same amount will flow through each chute into the receptacles? ……………………………….. ____ c. Repeat a & b by using the portion of the sample in one of the receptacles as many times as necessary until the sample has been reduced to the intended mass as specified by test proce dure? ………………………………………………………… ____ d. Repeat above procedures for other tests using the remaining portion if  required? ………………………………………………………………………………. ____ Method B / Clause 10.1.1 a. Placed sample on a hard, clean, and level surface – surface area to be of sufficient size to prevent loss of material? …………………………………………………….. ____ b. Mixed sample thoroughly by turning sample over 3 times? ……………………... ____ c. Shoveled into a conical pile and then flattened pile to a uniform thickness and diameter? ……………………………………………………………………………… ____ d. Diameter approximately 4 to 8 times the thickness? ……………………………... ____ e. Divide flattened sample into 4 equal quarters with trowel or shovel? …………… ____ f. Removed diagonally opposite quarters including all fine material? …………….. ____ g. Repeat procedure successively with remaining material until sample is reduced to required mass? ……………………………………………………………………….. ____ Method B (alternative) / Clause 10.1.2 a. b.

Canvas blanket placed on uneven floor surface? ………………………………… ____ Place sample on canvas blanket and repeat procedures (a to g)? ….………….. ____ Or 

c. d.

Alternatively lift each corner of the canvas and pull over sample towards the diagonally opposite corner? …………………………………………………………. ____ Repeat Items (c to g) – also described in Method B (clause 10.1.1)? ………… ____ Note 4: If surface area too uneven to use shovel, refer to ASTM C702 / clause 10.1.2 for procedure utilizing a stick or pipe under the canvas blanket.

Page 3 Standard Practice fo r Reducing Samples of Aggregate to Testing Size  ASTM C702 – 98 (Reapp ro ved 2003)

PROCEDURE (cont inu ed) Method C / ASTM C702 a.

Refer to clause 12.1 for details

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