Principles Pervious Principles Pervious Concrete Testing - Charles Mitchell, P.E

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Principles Pervious Principles Pervious Concrete Testing present of Test Methods for Previous Concrete; ASTMASTM C1688/C1688MC1688/C1688M – 10a10a; ASTMASTM C1701/C1701MC1701/C1701M – 0909; ACI 522R-10; Compressive Strength of Pervious Concrete; ASTM draft – Compressive Strength Procedure – Curing Cylinders;...

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Nội dung Text: Principles Pervious Principles Pervious Concrete Testing - Charles Mitchell, P.E

Principles Pervious Concrete Testing Charles Mitchell, P.E. cmitchell@specializedengineerin.com www.specializedengineering.com
Test Methods for Previous C t Concrete Plastic Test Hardened Sample Tests In-situ Tests www.specializedengineering.com
Test Methods Specific to P i Previous C t Concrete 2 current ASTM tests  ASTM C1688 – Densityy & Void Content  ASTM C1701 – In Place Infiltration 3 draft test methods in ASTM Committee C09.49 (2012)  Compressive Strength  Surface Durability  Hardened Density & Porosity www.specializedengineering.com
ASTM C1688/C1688M – 10a Standard Test Method for D Density i and d Void V id Content C off Freshly F hl Mixed Pervious Concrete www.specializedengineering.com
ASTM C1688/C1688M – 10a Method not listed in ACI 522.1 522.1-08 08 (Specification for Pervious Concrete Pavement) 1.6.2 & 1.6.5.1 reference C138/C29 jigging ACI 522R-10 (Report p on Pervious Concrete) references C1688 Use C1688, not C138/C29 jigging Make sure mix design density references C1688 www.specializedengineering.com
ASTM C1688/C1688M – 10a Purpose: Compare density and void content of freshly mixed pervious concrete with mix design des g values a ues ((± 5 pc pcf pe per ACI C 522R-10) 5 0) Note: “Test results are not intended to represent the in- place density and void content” www.specializedengineering.com
ASTM C1688/C1688M – 10a Appa at s Apparatus Balance Standard Proctor Hammer Measure (1/4 cf - similar to ASTM C231 pressure meter) Strike off plate Scoop www.specializedengineering.com
ASTM C1688/C1688M – 10a P oced e Procedure Moisten inside of measure and weigh Place on flat, f level surface f ffree ffrom vibration Fill in 2 layers, approximately equal thickness 20 hammer drops per layer www.specializedengineering.com
ASTM C1688/C1688M – 10a 1st Layer ay Consolidation o o da o www.specializedengineering.com
ASTM C1688/C1688M – 10a 2nd Layer ay (heaping) ( ap g) www.specializedengineering.com
ASTM C1688/C1688M – 10a 2nd (Final) Layer La e After 10 hammer drops:  If nott enough h concrete, t add dd more  If too much concrete, remove some Complete 2nd layer with 10 more hammer drops (20 total) www.specializedengineering.com
ASTM C1688/C1688M – 10a 2nd Layer ay consolidation o o da o www.specializedengineering.com
ASTM C1688/C1688M – 10a P oced e (cont Procedure (cont.)) Strike off  Cover 2/3 & withdraw C ithd with ith sawing i motion ti  Cover same 2/3 & advance with sawing motion ti  Finish with several sawing motion strokes with inclined edge of plate Weigh measure with concrete www.specializedengineering.com
ASTM C1688/C1688M – 10a 1st Strike off o www.specializedengineering.com
ASTM C1688/C1688M – 10a Finish Screeding d g www.specializedengineering.com
ASTM C1688/C1688M – 10a Calc lation Calculation www.specializedengineering.com
ASTM C1688/C1688M – 10a Final a Weight g & Calculate a ua www.specializedengineering.com
ASTM C1701/C1701M – 09 Standard Test Method for I fil Infiltration i Rate R off In I Place Pl Pervious Concrete www.specializedengineering.com
ASTM C1701/C1701M – 09 Purpose: Determination of the field water i filt ti rate infiltration t off iin place l pervious i concrete (surface) Restrictions: Does not determine if bottom of pervious p concrete is clogged, and does not y g determine infiltration of underlying drainage layer and soil www.specializedengineering.com
ASTM C1701/C1701M – 09 Appa at s Apparatus Infiltration ring - 12±½” diameter Balance Container – 5 gallons Stop Watch Plumbers Putty Water www.specializedengineering.com