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what is mass concrete quora

what is mass concrete quora

What is mass concrete? - Quora

Concrete is a composite materialmass concrete is a mixture of ciment water gravels and sand mainly Concrete without steels bars is weak in tensionboth together is called reinforced concrete which Engineers design

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What is the slump value for mass concrete work? - Quora

Slump values for concrete vary dependant upon the application the concrete is being poured for. Any mixed concrete less than about 60 slump will not pour well from a delivery truck and will probably need to be tamped into place onsite. 80 slump co...

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What is concrete? - Quora

Concrete is one if the most used construction materials in the world today. It can be placed in forms to create almost any shape, or placed in flat slabs thousands of feet long and inches or feet thick, it can be structural columns and beams suppo...

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What is concrete - civilarchives.quora

Jun 06, 2020  Concrete is a material used for making columns, beams, slabs, waffle forms, panels and many other elements of construction. Those elements are used to make bridges, dams, roads and runways, pipes, docks, pilings, prestressed and precast forms used for making buildings and even canoes and sailboats.

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What is the quantity of cement for a concrete beam 9in ...

Jul 07, 2020  if you have 4.5cubic metres concrete at a ratio of 1:2:3, total units of cement and aggregates is 6. For cement we therefore have. 1/6 x 4.5CM=0.75CM of cement. Density of cement=1440kg/cubic m. Therefore mass=1440x0.75=1080kg. Consider shrinkage of 30% and 5%waste=378kgs. Total=1458kgs; 2/6 x 4.5CM=1.5CM of sand.

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When rebar rusts and breaks the concrete, what force is ...

The strength of concrete is usually measured by crushing it in controlled conditions. It may be crushed as a cured cube of the concrete mix or a cored cylinder of it. The failure mechanism of the test sample under crushing stresses is caused by the progressive dislocation of the concrete mass under the applied load - a hydraulically applied force.

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Proportioning for Mass Concrete

F Mass of Fly Ash 133 133 133 133 Lb/Cu.Yd. W Mass of 1 yd 3 of Concrete 3877 3877 3877 3877 Lb/Cu.Yd. H 1 Heat of Hydration, Portland 58.2 58.2 58.2 58.2 Cal/G

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What is the worst case of mass hysteria ever to hit the UK ...

We see mass hysteria today in Donald Trump’s base. This is a group of people who have forsaken core values they espoused as Christians only a few years ago—truth, mercy, fairness, decency, neighborliness, courtesy, generosity, kindness—for a mean sort of political belligerence that is as ugly as it is un-Christian.

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How do concrete and cement differ in composition and usage ...

AGGREGATE: It provides mass and strength to the concrete. The mass of the concrete is varied by the size of the aggregate and the strength of concrete is varied by the crushing strength of the concrete. SAND: Sand is the filling agent of concrete. It fills the void and removes air. Since sand is silica so it also adds to the strength marginally.

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What is the quantity of cement for a concrete beam 9in ...

Jul 07, 2020  if you have 4.5cubic metres concrete at a ratio of 1:2:3, total units of cement and aggregates is 6. For cement we therefore have. 1/6 x 4.5CM=0.75CM of cement. Density of cement=1440kg/cubic m. Therefore mass=1440x0.75=1080kg. Consider shrinkage of 30% and 5%waste=378kgs. Total=1458kgs; 2/6 x 4.5CM=1.5CM of sand.

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Mass Concrete - Portland Cement Association

Mass concrete is defined by the American Concrete Institute as: “any volume of concrete in which a combination of dimensions of the member being cast, the boundary conditions, the characteristics of the concrete mixture, and the ambient conditions can lead to undesirable thermal stresses, cracking, deleterious chemical reactions, or reduction in the long-term strength as a result of elevated ...

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What are the different types of shrinkage which occur in ...

Concrete subjected to alternate wetting and drying in air containing CO2, carbonation shrinkage becomes progressively more apparent. The total shrinkage at any stage is greater than drying the concrete in CO2 free air. Thus carbonation increases the magnitude of irreversible shrinkage and crazing of exposed concrete mass occurs.

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Proportioning for Mass Concrete

F Mass of Fly Ash 133 133 133 133 Lb/Cu.Yd. W Mass of 1 yd 3 of Concrete 3877 3877 3877 3877 Lb/Cu.Yd. H 1 Heat of Hydration, Portland 58.2 58.2 58.2 58.2 Cal/G

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What is the grade of concrete for nominal mix design ...

Jun 29, 2020  From M5 to M25 grade, the concrete proportions are called Nominal mix. Nominal mix is generally adopted for small scale constructions. In this type of mix, the mix ratios and concrete constituent proportions are prefixed and specified. Example - M20 for M20 grade of concrete, the quantity of cement, sand aggregate is batched in volume as per ...

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What is the weight of Cement bag? - Anything Informative

Lower the ratio, higher is the strength and vice versa. But lower water content makes it difficult to compact the concrete especially if it is a reinforced concrete structure. To overcome the difficulty we use large-sized aggregate in mass concrete structures and lower size aggregates in reinforced concrete

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Mass concrete - Wikipedia

Mass concrete is defined by American Concrete Institute Committee 207 as "any volume of concrete with dimensions large enough to require that measures be taken to cope with the generation of heat from hydration of cement and attendant volume change to minimize cracking.". As interior temperature of mass concrete rises due to the process of cement hydration, the outer concrete may be cooling ...

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What is the best cement for construction of house ...

Oct 02, 2020  Use OPC 53 for RCC and prestressed concrete of high grades. 2. PPC (Portland Pozzolana Cement) - It is used for the construction of masonry mortars, plastering, hydraulic structures, marine works, mass concerning like dams, wall foundations, sewage pipes, etc.

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Why was the concrete of the Romans so strong? - Ancient Europe

In order to cast concrete, we need to create formwork that will hold the concrete in place while it sets. Contrary to belief, concrete can set underwater. The chemical reaction that sets concrete [well, cement] in fact needs a lot of humidity [which is the reason why people water poured concrete on a slab to prevent cracks from happening].

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Thermal mass of concrete

Concrete has a high thermal mass with properties similar to brick and stone. It is possible to absorb heat from the atmosphere in warm weather and release it during cooler periods, e.g. overnight. This is known as the ‘thermal flywheel’ effect. In a passive concrete design the cooling capacity of concrete can be up to 25W/m 2 and with an ...

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How many mass shootings do you expect will occur in the ...

A mass shooting can have several definitions, one useful one is along the lines of “Four or more people, not including the shooter, shot and killed in a single pubic/random event”. Lets choose a time period (since the questions did not state one). I think a mass shooting in any calendar given year is a reasonable period.

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What is the difference between retaining wall and ... - Quora

Nov 22, 2020  Precast concrete diaphragm walls have the same advantages but are less flexible in terms of design. ... Definition Edit A wall for holding in place a mass of earth or the like, as at the edge of a terrace or excavation. A retaining wall is a structure designed and constructed to resist the lateral pressure of soil, when there is a desired ...

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What is Volumetric Batching of Concrete?

Sep 07, 2018  Mr. Ritesh Patel is a Civil Engineer who has earned Bachelor’s degree in 2005. He is a senior editor at GharPedia and, core member of Editorial Team, senior manager at SDCPL (Civil Eng.). He looks after constructing a House, Concrete, Material, Repairs, MEP etc. section of Gharpedia. His rich field experience helps in solving people’s day to day problems.

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How do concrete and cement differ in composition and usage ...

AGGREGATE: It provides mass and strength to the concrete. The mass of the concrete is varied by the size of the aggregate and the strength of concrete is varied by the crushing strength of the concrete. SAND: Sand is the filling agent of concrete. It fills the void and removes air. Since sand is silica so it also adds to the strength marginally.

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Proportioning for Mass Concrete

F Mass of Fly Ash 133 133 133 133 Lb/Cu.Yd. W Mass of 1 yd 3 of Concrete 3877 3877 3877 3877 Lb/Cu.Yd. H 1 Heat of Hydration, Portland 58.2 58.2 58.2 58.2 Cal/G

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What is the cylinder and cube compressive strength of M25 ...

Concrete is going to cure if it is mixed in proper proportions and allowed to harden. My assumption is the question means without taking steps to cure it by applying curing compound, keeping the surface wet, or covering it with a waterproof membrane to keep the water in the concrete mass while it cures.

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Mass Concrete Bespoke Concrete Design and Installation

Pioneering the world's appreciation of concrete. Founded in 2000, MASS Concrete is the UK’s leading manufacturer of unique products and installations in concrete. With a combined experience of over 70 years in the construction industry, our specialist team is widely recognised by leading architects, designers and specifiers for excellence in bringing creative ideas to life.

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If a photon is massless, why does it have momentum ...

Whatever said and done, it is an unimpeachable fact that light carries energy and mass with it, and we need a concrete theoretical explanation for this phenomenon. The reader may see that this paradox gets resolved with a conceptual understanding of the structure of a light ray as presented in Ch 8 and Ch 9. And, we will take up this issue once ...

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What makes concrete trucks so noisy? - Cars and Trucks

May 24, 2019  Skip to content. Skip to search. Sign In

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What is quick condition? - Civil engineering

It is used for normal grade of concrete upto M-20, plastering, flooring, grouting of cable ducts in PSC works etc. The fineness should be between 225 and 280. ii) 43 grade OPC: It is the most widely used general purpose cement. For concrete grades upto M-30, precast elements. For marine structures but C3A should be between 5 – 8%. iii) 53 ...

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What is the difference between kg-mass and kg-force? - Quora

Mass is the quantity of matter in a body regardless of its volume or of any forces acting on it. It is measured in kg. Kg - force is equal to the magnitude of the force exerted on one kilogram of mass in a 9.8 m/s² gravitational field. Thus 1 kg force = 9.8 newton.

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What is difference between deficient frame and redundant ...

Where, n = number of members and j = number of joints. Now, if in a frame, number of members and number of joints are not given by n = 2 j − 3 then it is called imperfect frame. Deficient frame and redundant frame are imperfect frame. If n 2 j − 3 then it is known as redundant frame.

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What Is Mass Media? - Definition, Types, Influence ...

Jul 30, 2020  Mass media is the means used to communicate to the general public. In this lesson, you will learn the different platforms for mass media and the influence that mass media has on society.

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What is Momentum in physics? - General knowledge

Dec 08, 2020  Momentum is the property that remains constant unless acted on by a force. Conversely, any change in momentum results in a force. The concepts of momentum and force are thus interwoven. From these two concepts we can build most of modern physics. What unifies the concepts of force and momentum is the concept of change.

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A rain drop of mass 2 gm falls from a height of 1 ... - Quora

(If m is the mass of the drop ,with the Vel without air resistance) (m v^2)/2=( 20000m)/2. Now KE= m2500/2. Difference tin the energy at the ground before fall is the work done by air friction. m(17500)/ 2 joul. m(8750) joul

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What Is Quora Why Should You Care?

Sep 11, 2020  Quora is a top-ranked question and answering community that can form the basis of a successful marketing campaign. This is how to do it. Quora is not only a

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What Is Concrete Slump? Hunker

Concrete is traditionally made out of a mixture of cement, water, sand and gravel. Modern concrete mixes also add other ingredients such as fibers, plastics and various chemical admixtures. The ingredients and the mixture proportion determine the properties of concrete, including slump.

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