Properties of Concrete

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Properties of Concrete

  1. 1. PROPERTIES OF CONCRETE4/22/02 Author: Tomas U. Ganiron 1 Jr
  2. 2. CONCRETE• IS A MIXTURE OF CEMENT, AGGREGATES, AND WATER. IT CAN ALSO BE LOOKED UPON AS A MIXTURE OOF AGGREGATES BOUND TOGOTHER USING CEMENT PASTE, CONPRISED OF PORTLAND CEMENT AND WATER.4/22/02 Author: Tomas U. Ganiron 2 Jr
  3. 3. Concrete • Voids 2%-8% • Cement paste 25%-40% • Aggregates 60%-75%4/22/02 Author: Tomas U. Ganiron 3 Jr
  4. 4. Properties of fresh ConcreteBLEEDING—IS THE MOVEMENT AND APPEARANCE OF WATER AT THE SURFACE OF FLESHLY PLACED CONCRETE. IT IS THE RESULT OF SETTLEMENT OF HEAVIER PARTICLES AND CAN BE HOOKED UPON AS A FORM OF SEGREGATIONWORKABILITY—THE EASE WITH WHICH A FRESH CONCRETE MIX CAN BE HANDLED FROM THE MIXER TO THE FINAL STRUCTURE4/22/02 Author: Tomas U. Ganiron 4 Jr
  5. 5. WORKABILITY1.CONSISTENCY2.MOBILITY3.COMPACTABILITY4/22/02 Author: Tomas U. Ganiron 5 Jr
  6. 6. CONSISTENCY• IS A MEASURE OF CONCRETE WETNESS OR FLUIDITY, WICH DEPENDS ON THE MIX PROPORTIONS AND PROPERTIES OF THE INGREDIENTS4/22/02 Author: Tomas U. Ganiron 6 Jr
  7. 7. SEGRAGATTIONTHE TENDENCY FOR SEPARATION OF LARGE ANF FINE PARTICLES IN A FRESH CONCRETE SCALING COMPRISES THE SURFACE CRACKS AND THE REMOVAL OF SURFACE LAYER IN CONCRETE PRODUCE BY THE PRESSURE GENERATED WHEN THE WATER IN CONCRETE PORES FREEZES4/22/02 Author: Tomas U. Ganiron 7 Jr
  8. 8. MIXING, PLACING, CURINGBATCHING—WEIGHING OUT OR MEASURING OUT ALL THE INGREDIENTS FOR A BATCH OF CONCRETE1. HAND MIXING2. TRUCK MIXER OR TRANSIT MIXER4/22/02 Author: Tomas U. Ganiron 8 Jr
  9. 9. TOOLS• SQUARE POINTED SHOVELS• TAMPER• STRIKE BOARD• WOOD FLOAT• STEEL(HAND)FLOAT OR TROWEL• EDGER4/22/02 Author: Tomas U. Ganiron 9 Jr
  10. 10. Tools• SHOVEL EDGER4/22/02 Author: Tomas U. Ganiron 10 Jr
  11. 11. FINISHES• SMOOTH FINISH• TROWEL FINISH• BROOM FINISH• ROCK SALT FINISH• EXPOSED AGGREGATES FINISH4/22/02 Author: Tomas U. Ganiron 11 Jr
  12. 12. CURING• PONDING• FOG SPRAYING• MOIST CURED OR WATER CURED• COVERING WITH PLASTIC, FIKM, OR PLASTIC SHEET• LIQUID CURING COMPOUNDS OR LIQUID MEMBRAIN FORMOING COMPOUNDS4/22/02 Author: Tomas U. Ganiron 12 Jr
  13. 13. TEMPERATURE• STEAM CURING IS ONE OF THE CURING TECHNIQUES IN WHICH HYDRATION RATE IS INCREASED BY SUPPLYING STEAM4/22/02 Author: Tomas U. Ganiron 13 Jr
  14. 14. 2 KINDS OF STEAM CURING• ATMOSPHERIC PRESSURE• HIGH-PRESSURE STEAM AUTOCLAVES4/22/02 Author: Tomas U. Ganiron 14 Jr

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