What is Consistency of Cement? – A minimum quantity of water (in percentage) added to cement that initiate the chemical reaction between water and cement to form a uniform paste of sufficient viscosity and desirable strength is known as consistency of cement.
- Consistency test of cement is done by Vicat appartus consist of Vicat apparatus, Plunger, Vicat Mould, scale and weighing balance, measuring cylinder and glass plate.
- 1) Normal or Standard Consistency of cement – the minimum quantity of water required for cement to form uniform paste that provide sufficient viscosity which will allow the Vicat plunger to penetrate to 5-7 mm point from the bottom and 33 -35mm from top of Vicat cement mould according to standard condition of temperature and humidity is known as cement normal or standard consistency.
Now question is “What is Standard or Normal consistency of cement? Their answer will be following: The standard or normal consistency of ordinary Portland cement varies between 25-35%.
Contents
- 1 What do mean by consistency of cement?
- 2 Why is consistency of cement important?
- 3 What is consistency and why is it important?
- 4 What is consistency in construction?
- 5 What is consistency strength?
- 6 Why consistency is a strength?
- 7 Why is consistency important in quality?
- 8 What is consistency and continuity?
- 9 What is consistency in construction?
What do mean by consistency of cement?
Consistency, plastic consistency, and workability – Q. What is meant by the terms “consistency,” “plastic consistency,” and “workability” as applied to concrete mixtures? A. Consistency is the relative mobility or ability of freshly mixed concrete to flow.
It includes the entire range of fluidity from the driest to the wettest possible mixtures. Plastic consistency indicates a condition where applied stress will result in continuous deformation without rupture. A plastic mixture possesses cohesion and does not crumble. It flows sluggishly and without segregation.
Workability is the property of freshly mixed concrete that determines the ease with which it can be mixed, placed, consolidated, and finished to a homogeneous condition. It is synonymous with placeability. It involves not only the concept of a consistency of concrete, but also the condition under which it is to be placed — size and shape of the member, spacing of reinforcing, or other details interfering with the ready filling of the forms.
For example, a stiff mixture with large aggregate that is workable in a large open form would not be placeable in a thin wall with complicated reinforcing details. Also, a mixture that appears too stiff may flow readily when it is vibrated with the proper equipment having the needed frequency and amplitude.
References: SP-1(02) ; ACI 238.1R-08 ; SP-233 Topics in Concrete: Admixture ; Concrete Fundamentals ; High Performance Concrete ; Testing of Concrete
Why is consistency of cement important?
What is the consistency test of cement? – The consistency of cement is the minimum water requirement to start the chemical reaction between water and cement. This test helps to identify the minimum water required to make the cement paste.
What is consistency & strength of cement?
Significance:- – When water is mixed with cement, it starts hydration. Excessive addition of water in cement results in an increase in Water cement ratio & ultimately cement loses its strength when it hardens. If Less water is added than required, Cement isn’t properly hydrated and results in loss of strength.
- The Standard or Normal consistency for Ordinary Portland cement varies between 25-35%.
- To prepare a mix of cement paste of Standard consistency 25-35% of water is added to cement.
- To explain in detail Let us assume a standard consistency is 30%.
- Take 400g of Cement for this quantity, Add 30% of Water.i.e., 120g of water content is added in cement to attain standard consistency.
Also Read:- Initial and final setting time of cement
What is consistency with example?
Consistency is carrying out something the same way, or something staying the same as it’s achieved in a particular way. An example of this could be when we’re painting a wall to achieve the same color and look overall. This creates a uniform look and is overall consistent to create the same color or design overall.
What is consistency and why is it important?
What it means to stay consistent – Consistency is the critical driver for success. Being consistent means dedicating yourself to your goals and staying focused on the things and activities to achieve your goals. Consistency requires a long-term commitment from you and involves sustained effort in doing actions repeatedly until you achieve your goals.
Discipline, accountability, and responsibility are all parts of staying consistent. Consistency can spell the difference between failure and success. Being consistent can help anybody to achieve success in any field of endeavor. It can be pretty easy to see why many people cannot be successful in their lives nowadays because of the way our society works and the proliferation of technology everywhere.
The world today revolves around providing instant gratification, and the presence of technology has made people more impatient, and they want quick results. With just too many distractions, people’s minds have become muddled about what they want to achieve in life, and there’s a lack of focus on what they want to do.
Why is consistency important in process?
A bit about Tallyfy – Are you looking to automate tasks between co-workers or clients? You’ve found the right app for that! With Tallyfy – you can automate tasks and business processes – within minutes. Let’s resume the rest of this article! Process consistency allows businesses to deal with the unknown and react to changes in the competitive landscape.
What is the use of consistency test?
9.5.1.3 Consistency test – The consistency test for cement mortar can also used to evaluate the fluidity and plasticity of soil, The test instrument is mainly composed of a cone with a sliding rod (height: 145 mm, cone base diameter: 75 mm, weight: 300±2 g) and a conical metal container.
- The evenly stirred soil is place in the container, the soil is tamped according to the test standards when it is about 1 cm from the top of the container, and the cone is allowed to sink freely from the center of the mortar surface.
- The consistency of the mortar, evaluated by penetration depth of the cone, is the reading of its falling distance after 10 seconds, which can be used to evaluate the fluidity and plasticity of the soil.
Read full chapter URL: https://www.sciencedirect.com/science/article/pii/B9780128239926000096
What is the consistency test?
Consistency Test – The results presented above are purely qualitative, based on the subjective assessment of many individuals. However, as is generally the case for many registration problems in practice, there was no ground truth available to test the registration against.
This makes the area of quantitative assessment of methods quite difficult. In order to test the method more quantitatively, a comparative consistency test was performed. This test aims to measure the robustness, rather than the accuracy of the registration method. Robustness is defined here as the ability to get close to the global minimum on all trials, whereas accuracy is the ability to precisely locate a (possibly local) minimum of the cost function.
For example, one method might always (say in over 99.99% of cases) be between 0.2mm and 0.6mm from the best possible solution compared to another method that was often less than 0.1mm from the best solution but would sometimes (say in 5% of cases) fail to find the global minimum and get trapped in a local minimum which could be in excess of 10mm from the best solution.
In this case the former method would be considered more robust than the latter while the latter method would be more accurate but less robust. Ideally a registration method should be both. The consistency test is designed to assess one necessary, but not sufficient, aspect of robustness. That is, the ability to find the same solution regardless of the initial position.
Any robust method, which always finds the global minimum, will give the same solution each time whereas a non-robust method which can be trapped by a local minimum is likely to give different solutions depending on the initial position. However, this condition is not sufficient in determining robustness as the same, consistent, solution may just be a large local minimum, rather than the global minimum.
Therefore it is also necessary to check that the registration solution is acceptable to someone trained in neuroanatomy. This aspect was addressed in the trials described above. More specifically, the consistency test for an individual image I involved taking the image and applying several pre-determined affine transformations, A j to it.
All these images (both transformed and un-transformed) were registered to a given reference image, I r, giving transformations T j, If the method was consistent the composite transformations should all be the same, which is illustrated in figure 6, Moreover, an RMS deviation between the composite registration and the registration from the un-transformed case allows quantification of the consistency.
The particular test used (which is also described in ) used 18 different images as the floating images (like the one shown in figure 3 a), all with the MNI 305 brain as the reference image. The 18 images were all, T2 weighted MRI images with voxel dimensions of 0.93mm by 0.93 mm by 5mm, while the MNI 305 template is a, T1 weighted MRI images with voxel dimensions of 1mm by 1 mm by 1mm. In addition to FLIRT, several other registration packages were tested. These were AIR, SPM, UMDS and MRITOTAL, These methods were chosen because the authors’ implementations were available, and so this constituted a fair test as opposed to a re-implementation of a method described in a paper, where often the lack of precise implementation details makes it difficult to produce a good working method.
- The results of such a test, using six different rotations about the Anterior-Posterior axis, are shown in figure 7,
- It can be seen that only FLIRT and MRITOTAL were consistent with this set of images.
- This indicates that the other methods, AIR, SPM and UMDS, get trapped in local minima more easily, and are not as robust.
In particular, rotations of only sometimes resulted in large differences in the final registrations, showing how sensitive the methods are to initial position.
A further consistency test was then performed comparing only MRITOTAL and FLIRT. This test used initial scalings rather than rotations. The reason that this is important is that MRITOTAL uses a purely local optimisation method (Gradient Descent) but relies on initial pre-processing to provide a good starting position.
This pre-processing is done by finding the principle axes of both volumes and initially aligning them. However, this initial alignment does not give any information about scaling and is dependent on the FOV, since when the edges of the volume truncate the image it can have a significant impact on the principle axes that are computed.
The results of the scaling consistency test are shown in figure 8, It can be seen that, although generally consistent, in three cases MRITOTAL produces registrations that deviate by more than 20mm (RMS) from each other. In contrast, FLIRT was consistent (less than 2mm RMS) for all images.
What is consistency in construction?
By Concrete Construction Staff. What is meant by consistency? Consistency refers in a general way to fluidity or workability and can be defined by such terms as dry, plastic, fluid, or wet. Slump is a more specific term for one kind of measurement of concrete consistency.
What affects the consistency of the cement?
What is The Normal Consistency or Standard Consistency of Cement Paste? – The normal consistency or standard consistency of a cement is defined as that consistency which will permit the Vicat plunger of 10 mm diameter to penetrate to a point 5 mm to 7 mm from the bottom of the Vicat mould when the cement paste is tested as described in procedure.
| Name of Test | Amount of Water Required |
| Soundness of cement (Le-Chatelier method) | 0.78 P |
| Setting time of cement | 0.85 P |
| Compressive strength of cement | (P/4 + 3)% of combined mass of cement and sand. |
P=Consistency of standard cement paste Factors That Affect the Standard Consistency of Cement Paste:- The Normal consistency of cement paste depends upon the factors such as temperature and fineness of cement. Higher the temperature and higher the fineness of cement results higher the normal consistency of cement and vice versa.
| Vicat Apparatus |
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Hi friends, you are welcomed in the world of Civil Allied Gyan, Here I have explained about determination of normal consistency or standard consistency of cement. Read definition, apparatus, IS code, test procedure, formula, result, lab report about normal or standard consistency of cement by Vicat apparatus, IS Code For Normal Consistency or Standard Consistency Test of Cement:-
- IS: 4031 (Part 4)-1988, Methods of physical test for hydraulic cement.
- IS: 5513-1996, For specification for Vicat’s apparatus.
Apparatus Required For Normal Consistency or Standard Consistency Test of Cement:-
- Vicat’s apparatus conforming to IS: 5513-1976
- Weighing Balance of capacity 1000g and sensitivity to 1g.
- Gauging trowel conforming to IS: 10086-1982.
- Stop Watch
- Dial Gauge
What is Vicat’s Apparatus? Vicat apparatus is a penetration device used in testing of hydraulic cements and similar materials to determine their normal or standard consistency, It is also used to determine the initial setting time and final setting time of hydraulic cements and similar materials.
What is consistency of cement in civil engineering?
Consistency of Cement Meaning – The consistency of cement paste is defined as the percentage of water requirement of cement paste at which the viscosity of paste in such a way that it determines the amount of water needed to make a paste. It is necessary to determine consistency because the amount of water affects the setting time of the cement,
What is consistency strength?
Gallup StrengthsFinder Consistency definition: People exceptionally talented in the Consistency theme are keenly aware of the need to treat people the same. They crave stable routines and clear rules and procedures that everyone can follow. Fairness. Equity.
Merit. These are all words that those with strong Consistency talents find appealing, accurate and even comforting. What is fair and equitable are foundational values for those high in Consistency. Individuals high in Consistency are keenly aware of the need to treat people the same no matter what their station in life.
They become annoyed or even outraged when some are given preferential treatment because of their status or position as it simply is not fair to treat some people better than others. Everyone deserves the same chance and should be allowed to succeed or fail – to show their worth – based on his or her merit.
Why consistency is a strength?
Definition of The StrengthsFinder Theme of Consistency® – People with the Strength of Consistency® have the ability to see what is fair and equitable to others, Balance is important to them, and they are very mindful of how people are being treated, whether fairly or unfairly.
Although they may not verbally express what they observe, they see it and remember it. People with the Strength of Consistency® desire to treat all fairly, they want to avoid injustice and may find themselves supporting and volunteering for causes that seek equal and fair treatment of people. Fairness and equality are obvious to the person with the strength of Consistency®.
Key words to describe the way they see the world may be:
Fair Equitable Balanced Just Equal
The Strength of Consistency® is seen in how they treat other people, and of note, Consistency® is primarily a way of thinking and processing information, decisions, and relationships. For a person with the Strength of Consistency®, fairness is his operating system. He wants all people to be treated the same. There will be no unfair advantages and certainly no favorites.
What is the principle of consistency?
Defining the Consistency Principle – Simply put, the Consistency Principle means that once your organization, or, more specifically, your bookkeeper or accounting department, adopts an accounting principle or method of documenting and reporting information, that method has to be used consistently moving forward. This applies to the line items on your financial statements, including things like:
Cash flow statements Balance sheetsProfit & loss statementsAccounts payable/accounts receivable reports
Relying on a consistent accounting method ensures that statements and information will be comparable, and it will be easier to see trends and extract accurate information. Only when a principle or method has a new version that improves reported financial results should you change.
Why is consistency important in quality?
Quality Control – It’s important to ensure that the company producing your products has adequate quality control measures in place. This applies whether you handle the production yourself, or you use a contract manufacturer. An ISO-certified company has taken the time and effort necessary to learn and implement the stringent requirements of the International Organization for Standardization.
Why is consistency important in the first place?
Throughout my career, I’ve strived to stay consistent about consistency. Even the best business plans will fail without a dedication to consistency. If I say I’m going to do something, I do it. If I say I’m going to be somewhere, I’m there. If I initiate a new business process or initiative, I follow through.
- In my experience, consistency is a must as you build and grow your business.
- Here’s why: 1.
- Consistency allows for measurement.
- Until you have tried something new for a period of time and in a consistent manner, you can’t decide if it works or not.
- How do you measure effectiveness if what you are measuring isn’t performed consistently? I typically give new initiatives, processes, and organizational structures at least six months before judging them a success or failure.
It’s often minor tweaking instead of major overhauls that make the difference.2. Consistency creates accountability. I ask my employees to be accountable for their deliverables and goals. They should expect the same in return from my leadership. I put a priority on making time for and being available to my team.
I work to establish consistent and recurring meetings when a project or aspect of the business requires attention. The simple fact that there is a set time to report on progress is often the catalyst that moves an initiative along to a successful end.3. Consistency establishes your reputation. Business growth requires a track record of success.
You can’t establish a track record if you are constantly shifting gears or trying new tactics. Many efforts fail before they get to the finish line, but not because the tactic was flawed or goals weren’t clear. The problem is often that the team simply didn’t stay the course to achieve the objective.4.
- Consistency makes you relevant.
- Your employees and your customers need a predictable flow of information from you.
- All too often I see businesses, both small and large, adopt a campaign or initiative only to end it before it gains traction.
- It’s effective to run many advertisements, numerous blog entries, weekly newsletters, or continual process changes throughout a year.5.
Consistency maintains your message. Your team pays as much or more attention to what you do as to what you say. Consistency in your leadership serves as a model for how they will behave. If you treat a meeting as unimportant, don’t be surprised when you find they are doing the same to fellow teammates or even customers.
What is consistency and continuity?
Continuity has to do with how things happen over time: if there aren’t any bumps or breaks and everything goes on continuously, then there’s continuity, Continuity has to do with consistency. If you have the same Spanish teacher for several semesters, that’s great continuity.
- If you have five different teachers in one year, that’s awful continuity.
- In TV and movies, continuity involves keeping the plot and characters consistent from one scene to the next.
- It drives fans crazy when a character is allergic to peanuts in one episode, and then eats a peanut butter sandwich in the next one.
Definitions of continuity
noun uninterrupted connection or union noun the property of a continuous and connected period of time noun a detailed script used in making a film in order to avoid discontinuities from shot to shot
What is consistency in construction?
By Concrete Construction Staff. What is meant by consistency? Consistency refers in a general way to fluidity or workability and can be defined by such terms as dry, plastic, fluid, or wet. Slump is a more specific term for one kind of measurement of concrete consistency.
What is workability and consistency?
Consistency and Workability Difference Consistency and workability are often confused with one another. Workability means the ease with which concrete can be moved and placed in forms without segregation, Consistency, on the other hand, is degree of wetness of concrete.
- Means how much wet the concrete is.
- Lets see the difference between consistency and workability in detail.
- It is often said that increasing water increases workability of the concrete.
- However, this is not always true.
- Increasing water or degree of wetness doesn’t always increases the workability.
- If water is increased then there are greater chances of segregation.
If concrete is segregated then it means coarse aggregates are separated from fines. In this case as coarse aggregates settles down then it is difficult to move and place the concrete. In other words, workability of concrete decreases due to segregation.
In addition to water, workability of fresh concrete also depends on size and amount of coarse and fine aggregates. Slump test of concrete Consistency cannot measure workability but it can give indication of workability of concrete. Consistency of concrete is measured with the help of slump test. In slump test, fresh concrete is filled in a cone in three equal-volume layers and each layer is consolidated with rodding it 25 times with a tamping rod.
The cone is then lifted up straight and the sag of the concrete is measured to nearest 1/4 inch from top of slump cone. Detailed procedure of slump test can be found in titled ‘Standard Test Method for Slump of Hydraulic Cement Concrete’. A lower slump like 2-4 in is an indication to less workable mix.
However exact answer to how workable is the mix depends on where the concrete is to be placed. For small structures or where steel reinforcement is too congested, this indication is true. Concrete will be difficult to place there. However, for mass concrete, like in foundations or where the finishes are done with power finishing machines, this indication can be not perfectly true.
We may require 4 in slump for foundation concrete to control segregation and it can go just perfect. Share this post with your friends generously and do comment. This will motivate me to share more cool stuff with you : Consistency and Workability Difference
