Cement (Part - 02).pdf

Ordinary Portland Cement Specification – IS 269 - 2015 Table – 1 – Performance Improvers; Table – 2 – Chemical Requirements for OPC GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - TWO 1 DETAILS OF IS 4031 (ALL PARTS) PART 1 DETERMINATION OF FINENESS BY DRY...

Ordinary Portland Cement Specification – IS 269 - 2015 Table – 1 – Performance Improvers; Table – 2 – Chemical Requirements for OPC GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - TWO 1 DETAILS OF IS 4031 (ALL PARTS) PART 1 DETERMINATION OF FINENESS BY DRY SIEVING PART 2 DETERMINATION OF FINENESS BY BLAINE AIR PERMEABILITY METHOD PART 3 DETERMINATION OF SOUNDNESS PART 4 DETERMINATION OF CONSISTENCY OF STANDARD CEMENT PASTE PART 5 DETERMINATION OF INITIAL AND FINAL SETTING TIMES PART 6 DETERMINATION OF COMPRESSIVE STRENGTH OF HYDRAULIC CEMENT OTHER THAN MASONRY CEMENT PART 7 DETERMINATION OF COMPRESSIVE STRENGTH OF MASONRY CEMENT PART 8 DETERMINATION OF TRANSVERSE AND COMPRESSIVE STRENGTH OF PLASTIC MORTAR USING PRISM PART 9 DETERMINATION OF HEAT OF HYDRATION PART 10 DETERMINATION OF DRYING SHRINKAGE PART 11 DETERMINATION OF DENSITY PART 12 DETERMINATION OF AIR CONTENT OF HYDRAULIC CEMENT MORTAR PART 13 MEASUREMENT OF WATER RETENTIVITY OF MASONRY CEMENT PART 14 DETERMINATION OF FALSE SET PART 15 DETERMINATION OF FINENESS BY WET SIEVING GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 2 TWO  Testing of cement in Laboratory Standard Consistency of Cement (If water required is P) Initial & Final Setting time (Amount of water required is 0.85P) Specific Gravity of cement Compressive Strength of Cement (Amount of water (0.25P+3)% of (wt of cement + Sand) Fineness of Cement Soundness of Cement (Amount of water 0.75P) GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 3 TWO  Vicat’s Apparatus - IS 5513 – 1996 GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 4 TWO Standard Consistency of Cement Amount of water required for preparing the standard cement paste. The result of this test will be required for the following THREE TESTS Initial Setting Time & Final Setting Time Compressive Strength of Cement Soundness Test IS Code for Vicat’s Apparatus – IS 5513 – 1996 IS Code for Determination of Consistency of Standard Cement Paste – IS 4031 (Part -4) 1988 IS Code for Determination of Initial & Final Setting time – IS 4031 (Part 5) 1988 GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 5 TWO FINAL SETTING TIME The period elapsing between the time when water is added to the cement and the time at which the needle makes an impression on the surface of test block while the attachment fails to do so shall be the final setting time. GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 6 TWO COMPRESSIVE STRENGTH OF CEMENT – IS 4031 (PART 6) CEMENT + STANDARD SAND (IS 650) AMOUNT OF WATER (0.25P+3)% BY WT. OF CEMENT + SAND STANDARD SAND IS AVAILABLE @TAMILNADU MINERALS – TAMIN ENNORE SAND – ENNORE IS A BEACH NEAR CHENNAI CEMENT + SAND1( 2mm to 1 mm) +SAND2 (1mm to 0.5 mm) +SAND3 (0.5 mm to 0.09 mm)= 200 GMS EACH TOTAL CEMENT + SAND = 800 gms Amount of water = (0.25P+3)% of 800 gms = Standard mixing – mould of 50 sq cm = 7.07 cm x 7.07 cm Curing and testing under standard conditions GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 7 TWO  Soundness of cement IS 4031(3) - 1988 Presence of excess CaO, MgO This will undergo expansion Lechatelier’s apparatus – IS 5514 – 1996 Accelerated test is performed GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 8 TWO Soundness of cement IS 4031(3) - 1988 Cement paste with water = 0.78P is placed in the mould Put the top and bottom glass plate and immerse is water (27 2oC) for 24 hours Measure the distance between the two legs (indicators) Submerge the assembly in water and bring to boiling temp in 30 minutes and keep in boiling for 3 hours Remove from water and allow it to cool Measure the distance between the legs The difference shall not be more than 10 mm for OPC and 5 mm for OPC sleeper grade cements GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 9 TWO Types of Cements IS 269 - 2015 GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 10 TWO Types of Cements GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 11 TWO Types of Cements GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 12 TWO  Types of Cements GEOPOLYMER CONCRETE LC3 CEMENT – LIME CALCINED CLAY CEMENT MOLTEN PLASTIC LIVING CONCRETE OR BACTERIAL CONCRETE GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 13 TWO Rapid Hardening Cement IS 8041 - 1990 More C3S – More Heat of Hydration Fineness not less than 325 m2/kg (finer than OPC) Soundness nor more than 5 mm (Lechatelier) Setting times same as OPC Comp strength at 24 hrs (72 Hrs) not less than 16 MPa, (27 MPa) Extra rapid hardening cement = Rapid Hardening cement + CaCl2 Prefabrication, Where early removal of formwork is required, road works where early release of traffic is required, Cold areas where rapid strength is required. GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 14 TWO Sulphate Resisting Cement IS 12330 - 1988 Restricted C3A GARJE RAJESH KUMAR – CE204 CONCRETE TECHNOLOGY - 15 TWO