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what is the minimum final setting time for cement quora

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What is the initial and final setting time of high ... - Quora

Answer (1 of 2): The initial setting time of this cement is more than 3.5 hours. The final setting setting time is about 5 hours. It therefore allows more time for mixing and placing operations. 1. It sets quickly and attains higher ultimate strength in a short period. Its strength after 1 day i...

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What is the desirable minimum initial setting time ... - Quora

Answer (1 of 2): Thanks for A2A As per our Indian standard code there's an range given for initial and final setting time for OPC I.e. Minimum initial setting time should be 30 minutes. and final setting time should not exceed 600 minutes or 10 hours . Here ultratech cement gives you great ...

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What is meant by the initial and final setting time of

Answer: 1. Initial setting time is the time when the paste starts losing its plasticity. 2. Final setting time is the time when the paste completely loses its plasticity.

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Setting Time Of Concrete Test Concrete Setting Time

Aug 29, 2019  The Setting Time of Concrete completely differs from the setting time of cement.The setting time of cement does not match or compare cement setting time with which the concrete is made. The concrete setting time mostly depends upon the w/c ratio, temperature conditions, type of cement, use of mineral admixture, use of plasticizer, in particular, retarding plasticizer.

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What is the initial and final setting time of high ... - Quora

Answer (1 of 2): The initial setting time of this cement is more than 3.5 hours. The final setting setting time is about 5 hours. It therefore allows more time for mixing and placing operations. 1. It sets quickly and attains higher ultimate strength in a short period. Its strength after 1 day i...

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What is meant by the initial and final setting time of cement?

Answer: 1. Initial setting time is the time when the paste starts losing its plasticity. 2. Final setting time is the time when the paste completely loses its plasticity.

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Initial and Final Setting Time of Cement

The final setting time is the time elapsed between the moment the water is added to the cement, and the time when the paste has completely lost its plasticity and has attained sufficient firmness to resist certain definite pressure. The temperature of moulding room, dry

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Test to Determine the Setting Time of Cement

Dec 22, 2018  Initial Setting Time of Cement – Note down the time, when needle fails to penetrate 5 – 7 mm from the bottom of the test block. This time is denoted as an initial setting time of cement. Final Setting Time of Cement – Note down the time, when needle fails to make an impression on the surface of the test block. This time is denoted as a ...

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Setting Time Of Concrete Test Concrete Setting Time Test ...

The Setting Time of Concrete completely differs from the setting time of cement.The setting time of cement does not match or compare cement setting time with which the concrete is made. The concrete setting time mostly depends upon the w/c ratio, temperature conditions, type of cement, use of mineral admixture, use of plasticizer, in particular, retarding plasticizer.

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Initial Setting Time and Final Setting Time of Concrete ...

Initial setting time=T 2-T 1. Final setting time=T 3-T 1. Where, T 1 =Time at which water is first added to cement. T 2 =Time when needle fails to penetrate 5 mm to 7 mm from bottom of the mould. T 3 =Time when the needle makes an impression but the attachment fails to do so. Standard Specification of Setting Time for Different Type of Cement

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Initial and Final Setting time of Cement Effects How ...

Oct 06, 2017  Significance of calculating Initial and final setting time of cement:-. Well, After mixing cement with water, it takes time to place the cement paste in position, initial setting time possess a primary role in strength it is mandated that cement paste or concrete is placed in position before it crosses initial setting time. i.e.,30mins.

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Table 1 Setting Time of Concrete at Various Temperature

Use of Admixture and Its Effects on Setting Time. Initial set, as defined by ACI 116R, is a degree of stiffening of a mixture of cement less than final set, generally stated as an empirical value indicating the time in hours and minutes required for the cement paste to stiffen sufficiently to resist to an established degree, the penetration of a weighted test needle.

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What is the difference between PPC cement and OPC ... - Quora

53 Grade OPC cement is Used in RCC and pre-stressed concrete of higher grades, cement grouts, instant plugging mortars etc. where initial higher strength is the criteria. 43 Grade OPC Cement are commonly used for plastering works, Non-RCC structures, pathways etc where initial setting time is not of importance and the same is for PPC cement.

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Setting time of cement decreases by adding

Setting time of cement decreases by adding Calcium Chloride. by adding calcium chloride decrease setting time of cement or shortens the time wasted at the wellsite as operators wait for cement properties to take hold. The mineral composition of cement and their ratios are the main factors affecting the setting and hardening of cement.

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Civil Engineering interview questions and answers for ...

What is the standard size of brick19 cm x 9 cm x 9 cm. What is the purpose of providing frog on brick. It is form key for holding mortar and joint to another brick above. What are initial and Final setting times of cement. Initial setting is about 30 min and final setting time is about 10 hrs.

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Initial Setting Time Final Setting Time - Setting ...

Initial setting time can be defined as the time when the cement paste starts losing its plasticity. As per IS specification, the minimum initial setting time is 30 minutes for ordinary portland cement and 60 minutes for low heat cement. Final Setting Time Of Cement: The final setting is defined as the time taken to reach the cement paste to ...

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Civil Engineering Basic Knowledge

June 9th, 2018 - CIVIL ENGINEERING Cement’s Intial Setting Time Should Be 30 Min Minimum And 90 Min Maximum Final Setting Time Of Cement Should Be 10 Hours''Civil Engineering Basic Knowledge of civil Engineer June 16th, 2018 - Basic Knowledge of civil Good one you explain all building and civil related work to must use for the pre engineering

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Is a 456 a cube? – Rehabilitationrobotics

May 22, 2020  In short, the curing should start after minimum six hours (Final setting time of cement) and not less than 24 hours. Thus, when concrete curing has to start is varies and depends on when the surface of the concrete begins to dry. How are bricks cured? Firing hardens and strengthens the brick.

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Setting Time of Concrete Concrete Retarder Allied Concrete

At low temperatures setting time is retarded. Proper curing techniques and site preparation will aid the setting time. However when concrete is being used in times of temperature extremes, i.e. colder weather or in the middle of summer, several admixtures may be used in the concrete mix to aid in the placement of the final product.

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Exp 2 Setting Time of Cement - Civil Engineers PK

After Performing the experiment we have concluded the results that the initial setting time of cement is 1 hr 20 mins and final setting time of cement paste is 4 hrs 25 mins. The minimum initial setting time is 45 minutes and maximum final setting time is 10 hrs. As the Initial and Final setting time is coming in between the prescribed range ...

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What is the difference between PPC cement and OPC ... - Quora

53 Grade OPC cement is Used in RCC and pre-stressed concrete of higher grades, cement grouts, instant plugging mortars etc. where initial higher strength is the criteria. 43 Grade OPC Cement are commonly used for plastering works, Non-RCC structures, pathways etc where initial setting time is not of importance and the same is for PPC cement.

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Table 1 Setting Time of Concrete at Various Temperature

Use of Admixture and Its Effects on Setting Time. Initial set, as defined by ACI 116R, is a degree of stiffening of a mixture of cement less than final set, generally stated as an empirical value indicating the time in hours and minutes required for the cement paste to stiffen sufficiently to resist to an established degree, the penetration of a weighted test needle.

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What is concrete - civilarchives.quora

Concrete is a mixture of cement, usually Portland cement, coarse and fine aggregates (think of coarse as gravel and fine as sand, though other materials may be used). When cement is mixed with water and the appropriate aggregates, it becom. Concrete is one

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Setting time of cement decreases by adding

Setting time of cement decreases by adding Calcium Chloride. by adding calcium chloride decrease setting time of cement or shortens the time wasted at the wellsite as operators wait for cement properties to take hold. The mineral composition of cement and their ratios are the main factors affecting the setting and hardening of cement.

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DETERMINATION OF INITIAL FINAL SETTING TIMES

Record the period elapsed between the time of adding water to the cement to the time when needle fails to pierce the mould by 5 + 0.5mm as the initial setting time. Final Setting Time Replace the needle of the vicat apparatus by the needle with an annular ring Lower the needle and quickly release.

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Initial Setting Time - an overview ScienceDirect Topics

Initial and final setting times of cement, which are determined using the Vicat needle test, are used as a quality control measure for cement characterisation (EN-196, 1995) and specified as a requirement in related standards (EN-197, 2011; ASTM C150, 2015).A comparison between the initial and the final setting time of cements manufactured with and without CS (Alp et al., 2008; Supekar, 2007 ...

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How To Determine The Initial And Final Setting Time Of The ...

5- Record the period elapsed between the time of adding water to the cement to the time when needle fails to pierce the mould by 5 + 0.5mm as the initial setting time. Final Setting Time 1- Replace the needle of the vicat apparatus by the needle with an annular ring 2- Lower the needle and quickly release.

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What is reinforced cement concrete? - Civil Engg.. n Design

Adding lime to plain unreinforced cement concrete or mortars alongwith pozzolanic materials helps make it more plastic and workable, more impervious to water, prolongs setting time to adjust minor deformations during the construction process and develops self-healing properties to automatically seal shrinkage cracks with time.

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PRODUCT MANUAL FOR PORTLAND POZZOLANA CEMENT

(iv) Setting time 6. Scope of the Licence : “Licence is granted to use Standard Mark on Portland Pozzolana Cement – Fly ash based as per IS 1489 (Part 1): 2015”. Any other aspect required as per the Standard Transverse strength test is optional test as per agreement between purchaser and

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Civil Engineering interview questions and answers for ...

What is the standard size of brick19 cm x 9 cm x 9 cm. What is the purpose of providing frog on brick. It is form key for holding mortar and joint to another brick above. What are initial and Final setting times of cement. Initial setting is about 30 min and final setting time is about 10 hrs.

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What Is Consistency of Cement What Is Initial Setting ...

Determination of Final Setting Time: from IS Code 4031 part 5, page no 2, cl 5.3. Replace the needle ( C ) of the Vicat apparatus by the needle with an annular attachment ( F ). The cement shall be considered as finally set whenFrom IS Code 4031 part 5. Upon applying the needle gently to the surface of the text test block, the needle makes an impression thereon, while the attachment fails to ...

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Initial Setting Time of Cement as per IS 4031, IS 269 ...

Initial Setting Time of Cement as per IS 4031, IS 269. Initial setting time of concrete is the time period between 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 mould 5mm to 7mm from the bottom of the mould. This test is required to understand the time cement ...

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