Which Factors Affect The Elastic Modulus Of Cement Paste?

Which Factors Affect The Elastic Modulus Of Cement Paste
8 Factors Affecting Modulus of Elasticity of Concrete

  • Strength of Concrete.
  • Cement Paste.
  • Aggregates.
  • Concrete Wetness Condition.
  • Transition Zone.
  • Mix Proportion.
  • Concrete Age.
  • Curing Regime.

What is the factors affecting the strength of cement paste?

🕑 Reading time: 1 minute Concrete strength is affected by many factors, such as quality of raw materials, water/cement ratio, coarse/fine aggregate ratio, age of concrete, compaction of concrete, temperature, relative humidity and curing of concrete.

What is a factor which controls the elastic modulus?

Young’s Modulus The Young’s Modulus of a material is a fundamental property of every material that cannot be changed. It is dependent upon temperature and pressure however. The Young’s Modulus (or Elastic Modulus) is in essence the of a material. In other words, it is how easily it is bended or stretched.

To be more exact, the physics and numerical values are worked out like this: = / Strain where: Stress = force / cross sectional area Strain = change in length / original length when graphed, the resulting plot will look something similar to this:

The Young’s modulus is the slope of the initial section of the curve (i.e. m in y = mx + b). When a material reached a certain stress, the material will begin to deform. It is up to point where the materials structure is stretching and not deforming. However, if you are to stress the material more than this, the molecules or atoms inside will begin to deform and permanently change the material.

  • A good analogy to this would be a rubber band: when you stretch a rubber band you are not deforming it, but stretching it.
  • However, if you pull it too hard the rubber band will begin to deteriorate, or deform.
  • Usually when this happens, it is not too much longer until it breaks.
  • Why Important? The Young’s Modulus is very important to doctors and scientists as this constant can tell them when a structural implant will deform.

This will let them know how to design a piece mechanically for use in a body. : Young’s Modulus

What is modulus of elasticity of concrete?

🕑 Reading time: 1 minute Modulus of elasticity of concrete(Ec) is defined as the ratio of the applied stress to the corresponding strain. Not only does it demonstrate the ability of concrete to withstand deformation due to applied stress but also its stiffness.

In other words, it reflects the ability of concrete to deflect elastically. Modulus of elasticity of concrete is sensitive to aggregate and mixture proportions of concrete. In the design of concrete structures, modulus of elasticity is considerably important that requires to be defined. The linear analysis of elements, which is based on elastic theory, is used in some cases to satisfy requirements of ultimate and serviceability limit state such as in the design of pre-stressed concrete structures.

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Common applicable codes around the world such as ACI Code, European Code, British Standards, Canadian standard association, and Indian standard have provided a formula for the computation of elastic modulus of concrete.

What is the main factor that affects elasticity?

Summary –

  • Elasticity is a general measure of the responsiveness of an economic variable in response to a change in another economic variable.
  • The three major forms of elasticity are price elasticity of demand, cross-price elasticity of demand, and income elasticity of demand.
  • The four factors that affect price elasticity of demand are (1) availability of substitutes, (2) if the good is a luxury or a necessity, (3) the proportion of income spent on the good, and (4) how much time has elapsed since the time the price changed.
  • If income elasticity is positive, the good is normal. If income elasticity is negative, the good is inferior.

What causes the setting of cement paste?

The setting of cement and hardening of concrete – planete-tp : All about public works Cement hardens when it comes into contact with water. This hardening is a process of crystallization. Crystals form (after a certain length of time which is known as the initial set time) and interlock with each other.

Concrete is completely fluid before the cement sets, then progressively hardens. The cement and water mixture that has crystallized in this way encloses the aggregate particles and produces a dense material. The concrete continues to harden over several months. Hardening is not a drying process and can very well take place in water.

Heat speeds up the setting and hardening of cement, and cold slows it down and can even completely stop the processes. Which Factors Affect The Elastic Modulus Of Cement Paste In order to crystallize or hydrate) cement requires a quantity of water equal to 25% of its weight. But in order for it to be laid and remain sufficiently workable, twice this amount is usually required. However, too much water can reduce the strength and durability of the concrete.

How does water affect the quality of cement paste?

The cement paste glues the aggregate together, fills voids within it, and allows it to flow more freely. Less water in the cement paste will yield a stronger, more durable concrete; more water will give an freer-flowing concrete with a higher slump.

What causes high elastic modulus?

A stiffer material has a higher elastic modulus.

Does modulus of elasticity change with temperature?

Increase in temperature decreases the modulus of elasticity. Increase in modulus of elasticity will increase the initial impact stress.

On what factors does the elastic limit of a material depend?

Solution : The elastic limit of a material wire depends on (i) the nature of material and (ii) the radius of the wire.

Which cement has the highest modulus of elasticity?

Modulus of elasticity and strength properties of dental cements – PubMed Clipboard, Search History, and several other advanced features are temporarily unavailable. The,gov means it’s official. Federal government websites often end in,gov or,mil. Before sharing sensitive information, make sure you’re on a federal government site. The site is secure. The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely. Display options Format Abstract PubMed PMID The modulus of elasticity of commercial dental cements was determined by an optical strain gauge method.

  1. Values of compressive and tensile strengths also were measured.
  2. Of the cements of primary consistency tested, a noneugenol zinc oxide cement had the lowest mechanical properties.
  3. A zinc phosphate cement had the highest value of compressive strength and modulus, but a zinc polyacrylate cement had the highest tensile strength.
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A zinc polyacrylate cement base had the highest tensile strength, but a zinc phosphate cement base had the highest compressive strength and modulus of elasticity. A calcium hydroxide liner had higher mechanical properties than an unmodified ZOE liner.

Hormati AA, Fuller JL. Hormati AA, et al. J Prosthet Dent.1980 Jan;43(1):52-7. doi: 10.1016/0022-3913(80)90354-6. J Prosthet Dent.1980. PMID: 6927908 Farah JW, Powers JM, Dennison JB, Craig RG, Spencer J. Farah JW, et al. J Dent Res.1976 Jan-Feb;55(1):115-20. doi: 10.1177/00220345760550010301. J Dent Res.1976. PMID: 1060645 Oilo G, Espevik S. Oilo G, et al. Nor Tannlaegeforen Tid.1978 Dec;88(11):500-3. Nor Tannlaegeforen Tid.1978. PMID: 281671 Norwegian. Montenegro AC, Machado AN, Depes Gouvêa CV. Montenegro AC, et al. Implant Dent.2008 Dec;17(4):451-60. doi: 10.1097/ID.0b013e31818c4947. Implant Dent.2008. PMID: 19077583 Review. Riccitiello F, Manieri G, Prisco R, Carratu P. Riccitiello F, et al. Arch Stomatol (Napoli).1990 Apr-Jun;31(2):197-216. Arch Stomatol (Napoli).1990. PMID: 2097939 Review. Italian.

What are the 3 modulus of elasticity?

Elastic Moduli can be of three types, Young’s modulus, Shear modulus, and Bulk modulus. In this article, we will understand elastic moduli in detail.

How can the modulus of elasticity for concrete be improved?

Modulus of elasticity of concrete is dependent on its compressive strength. Higher W/C ratio, shorter curing period or lesser vibration will produce concrete of lesser compressive strength. With increase in age compressive strength increases and therefore modulus of elasticity of concrete increases.

What are the 3 factors used to determine elasticity of products?

The main determinants of a product’s elasticity are the availability of close substitutes, the amount of time a consumer has to search for substitutes, and the percentage of a consumer’s budget that is required to purchase the good.

What are the 4 types of elasticity?

What Are the 4 Types of Elasticity? – Four types of elasticity are demand elasticity, income elasticity, cross elasticity, and price elasticity.

What are the 5 types of elasticity?

Elasticities can be usefully divided into five broad categories: perfectly elastic, elastic, perfectly inelastic, inelastic, and unitary.

Which of these is not a factor affecting elasticity of demand?

The cost of producing the product will not affect the elasticity of demand for a product.

What are 3 factors that impact elasticity?

Key Takeaways –

Many factors determine the demand elasticity for a product, including price levels, the type of product or service, income levels, and the availability of any potential substitutes.High-priced products often are highly elastic because, if prices fall, consumers are likely to buy at a lower price.Compared to essential goods, luxury items are highly elastic. Goods with many alternatives or competitors are elastic because, as the price of the good rises, consumers shift purchases to substitute items.Incomes and elasticity are related—as consumer incomes increase, demand for products increases as well.

What are the 3 factors used to determine elasticity of products?

The main determinants of a product’s elasticity are the availability of close substitutes, the amount of time a consumer has to search for substitutes, and the percentage of a consumer’s budget that is required to purchase the good.

What are 2 of the 4 main factors that influence the elasticity of supply?

What Factors Influence a Change in Supply Elasticity? Supply elasticity is a measure of the responsiveness of an industry or a producer to changes in demand for its product. The availability of critical resources, technology innovation, and the number of competitors producing a product or service also are factors.

  • The flexibility of production levels affects supply elasticity.
  • Availability of critical resources is a factor.
  • The number of competitors in an industry affects its supply elasticity.
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Elasticity of supply is a measure of a producer’s ability to cope effectively with changes in demand. A number of factors can affect it. Investopedia / Alison Czinkota

  • Availability of resources is a factor. If a company depends on an increasingly scarce resource to produce its product, it may be unable to step up production when demand increases. Moreover, the resource will become increasingly expensive, forcing a corresponding increase in the producer’s price or decrease in its production, or both.
  • Technology innovation is a factor in many industries. More efficient production reduces costs and allows for larger production numbers at lower prices.
  • The number of competitors is a factor. An increase in the number of suppliers makes the price of a product or service more elastic. If one supplier can’t meet demand, others will rush to fill the gap.
  • Flexibility is a big factor. If a resource becomes scarce, can another resource be substituted? Can production be ramped up quickly in response to greater demand? Efficient producers can respond more quickly to increased demand.

The price of any product or service also is elastic or inelastic in relation to its, This is determined by measuring the in its supply and the percentage change in its price over a period of time. Dividing the change in supply by the change in price results in a numerical value.

  1. If that number is more than one, the product shows price elasticity.
  2. If it is less than one, the product is inelastic.
  3. Technology innovation can reduce supply elasticity.
  4. More efficient production reduces costs and allows for expanded production.
  5. If supply is elastic, so is price.
  6. A greater supply of a product or service reduces its cost.

A scarcer supply forces prices up. The most notorious example of price elasticity may be seen in the price of gasoline at the pump. In 2008, demand for fuel soared worldwide, with big increases in developing nations like China. The price of crude increased to above $3 per gallon, while the price to American consumers increased to more than $100 per barrel.

  • With increases in production and inventories, prices fell off a cliff.
  • By early 2009, the price of crude was around $45 per barrel and the price to consumers was under $1.75.
  • The price of gasoline is elastic.
  • That is, consumers must buy it no matter what the price is.
  • Its supply is also elastic.
  • If demand increases, the industry will increase production to meet it.

Investopedia requires writers to use primary sources to support their work. These include white papers, government data, original reporting, and interviews with industry experts. We also reference original research from other reputable publishers where appropriate.

  1. U.S. Energy Information Administration.”.”
  2. U.S. Energy Information Administration.”.”

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Which of the following can affect Young’s Modulus?

When the impurity concentration is less than 10%, Young’s moduli decrease roughly linearly as the impurity concentration increases, with the impurity Si causing the biggest decreasing ratio and the impurity N the smallest.