Consistency test to be done before starting the test procedure to find out the water required to give the paste normal consistency (P). Setting time is the time required for stiffening of cement paste to a defined consistency. ACC Cement is the most commonly used cement in all constructions including plain and reinforced cement concrete, brick and stone masonry, floors and plastering. Initial setting time duration is also required to delay the process of hydration or hardening.Final setting time is the time when the paste completely loses its plasticity.It is the time taken for the cement paste or cement concrete to harden sufficiently and attain the shape of the mould in which it is cast. Start the stop watch at the instant when the water is added to the cement. Become VIP Member. To determine an appro- Your email address will not be published. Determination of final setting time period facilitates safe removal of scaffolding or form. How to Choose Water Pumps for Construction Sites? Setting time of PPC us higher than OPC. Concrete producers some-times address setting-time requirements. https://www.youtube.com/watch?v=Tnvd9OUPu3A, The fineness value of PSC when tested by Blaine’s air permeability method shall not be less than 225 m. The expansion value (i.e. A cement is a binder, a substance used for construction that sets, hardens, and adheres to other materials to bind them together. autoclave soundness test after aeration of the cement, incorporating a clause on false set of cement and permitting packaging of cement in 25 kg bags. 2 IS 12269 : 2013 Table 2 Chemical Requirements for Ordinary Portland Cement, 53 Grade (Foreword and Clauses 5.1 and 5.2)Sl No. Or. The average compressive strength of at least 3 mortar cubes, when tested as per IS-4031-Part 6, shall be as follows. Take 400 g of cement and prepare a neat cement paste with 0.85P of water by weight of cement. the setting time of cement are measured using VICAT APPARATUS . The cement block thus prepared is called test block. Final setting time is that time period between the time water is added to cement and the time at which 1 mm needle makes an impression on the paste in the mould but 5 mm attachment does not make any impression. Place the test block confined in the mould and resting on the non-porous plate, under the rod bearing the needle. This time should not be more than 10 hours (600 minutes) which called final setting time of cement. It is the time period between the addition of water to cement till the time at 1 mm square section needle fails to penetrate the cement paste, placed in the Vicat’s mold 5mm to 7mm from the bottom of the mold. The determination of final setting time period facilitates safe removal of scaffolding or form. 12.3.2 Setting Time Test Cement paste of standard consistence is used for this test. Initial setting time is that time period between the time water is added to cement and time at which 1 mm square section needle fails to penetrate the cement paste, placed in the Vicat’s mould 5 mm to 7 mm from the bottom of the mould. Gauge time is kept between 3 to 5 minutes. Final setting time of 53 grade OPC shall not be more than 600 minutes. Setting tests are used to characterize how a particular cement paste sets. For Ordinary Portland Cement, The Final Setting Time is 600 minutes (10hrs). 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