Please discuss the Determination of Time of Setting of Hydraulic Cement by Vicat Aparatus Materials and EquipmentPortland cementScales and weightGraduated cylinder, 200 or 250 ml capacityVicat apparatusProcedure1. Preparation of Cement PasteMix 650 grams of cement with the percentage required for normal consistency following theprocedure of mixing hydraulic cement pastes and mortars of Plastic consistency.2. Molding of Test Specimena Quickly form a cement paste into a ball and toss six times from one hand to the othermaintaining the distance between the hands about 152 mm apart.b. Press the ball into the conical ring filling the ring with paste completely. Remove the excess|paste by a single movement of the palm of the hand.c. Place the ring on a glass plate. Šlice off the excess paste by a single oblique stroke of asharp-edged trowel. Take care not to compress the paste during cutting or smoothing excesspaste.d. Immediately after molding, place the specimen in the moist closet or moist room with atemperature of 23°Cc (734 F) =1.7°C (3°F) ; and allow it to remain there except whendeterminations of time of setting are being made. The specimen shall remain in the conicalmold, supported by the glass plate throughout the test period.3. Time of setting Determinationa Allow the specimen to remain in the moist cabinet or room for 30 minutes after moldingwithout being disturbed. Determine the penetration of the one mm needle at this time andevery 15 minutes thereafter until a penetration of 25 mm or less is obtained.b. For the penetration test, lower the needle of the rod until it rests on the surface of the cementpaste. Tighten the set screw and set the indicator at the upper end of the scale, or take aninitial reading. Release the rod quickly by releasing the set screw and allow the needle tosettle for 30 seconds, then take the reading to determine the penetration. No penetration testshall be made closer than 4 in. from any previous penetration and nor shall be made closerthan 3/8 in from the inside mold.c. Record the results of all penetration tests and, by interpolation detemine the time when apenetration of 25 mm is obtained which the initial is setting time.d. At the time the needle does not sink visible into the paste, it is considered too be final settingtime.

Question

Please discuss the Determination of Time of Setting of Hydraulic Cement by Vicat Aparatus Materials and EquipmentPortland cementScales and weightGraduated cylinder, 200 or 250 ml capacityVicat apparatusProcedure1. Preparation of Cement PasteMix 650 grams of cement with the percentage required for normal consistency following theprocedure of mixing hydraulic cement pastes and mortars of Plastic consistency.2. Molding of Test Specimena Quickly form a cement paste into a ball and toss six times from one hand to the othermaintaining the distance between the hands about 152 mm apart.b. Press the ball into the conical ring filling the ring with paste completely. Remove the excess|paste by a single movement of the palm of the hand.c. Place the ring on a glass plate. Šlice off the excess paste by a single oblique stroke of asharp-edged trowel. Take care not to compress the paste during cutting or smoothing excesspaste.d. Immediately after molding, place the specimen in the moist closet or moist room with atemperature of 23°Cc (734 F) =1.7°C (3°F) ; and allow it to remain there except whendeterminations of time of setting are being made. The specimen shall remain in the conicalmold, supported by the glass plate throughout the test period.3. Time of setting Determinationa Allow the specimen to remain in the moist cabinet or room for 30 minutes after moldingwithout being disturbed. Determine the penetration of the one mm needle at this time andevery 15 minutes thereafter until a penetration of 25 mm or less is obtained.b. For the penetration test, lower the needle of the rod until it rests on the surface of the cementpaste. Tighten the set screw and set the indicator at the upper end of the scale, or take aninitial reading. Release the rod quickly by releasing the set screw and allow the needle tosettle for 30 seconds, then take the reading to determine the penetration. No penetration testshall be made closer than 4 in. from any previous penetration and nor shall be made closerthan 3/8 in from the inside mold.c. Record the results of all penetration tests and, by interpolation detemine the time when apenetration of 25 mm is obtained which the initial is setting time.d. At the time the needle does not sink visible into the paste, it is considered too be final settingtime.

Accepted Answer

Initial setting time should be less than 30 minutes.
Initial setting is the time in which cement…