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fineness of cement and concrete quality| concrete

fineness of cement and concrete quality| concrete

Fineness of Cement and Concrete Quality Concrete ...

How does the fineness of cement affect the quality of concrete? If the fineness is high, what procedures can be followed to maintain quality in the product? A.: The fineness of cement usually affects the rate at which cement gains strength. It may also have a minor effect on workability but probably not much.

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Cement Fineness Concrete Construction Magazine

Aug 01, 1970  Increasing the fineness of cement reduces the amount of bleeding in concrete. This is more pronounced for concrete containing no entrained air. 2. Increasing the fineness of cement from 2700 to about 4000 cm2/g reduces the water requirement of concrete. Increasing the fineness of cement beyond an optimum limit increases the water requirement of ...

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What Is Fineness Of Cement Fineness Test Of Cement ...

May 29, 2019  What Is Fineness of Cement. The fineness of cement is a measure of cement particle size and is denoted as terms of the specific surface area of cement.. The Fineness Test of Cement is done by sieving cement sample through standard IS sieve. The weight cement particle whose size greater than 90 microns is determined and the percentage of retained cement particle are calculated.

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What is the Fineness of Cement It's Test and Effects ...

Apr 12, 2020  A Fineness of Cement is Measure of the size of Cement Particle, and it is described in terms of the specific surface area of Cement particle. The Fineness of cement can be Calculated by particle size analysis, by using the air permeability method, by using sedimentation method.

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Effect of the marble fineness on the rheological ...

This marble powder showed a very high Blaine fineness value of about 1500 m2/kg, with 90% of particles finer than 50 μm and 50% under 7 μm. For rheological studies, several cement pastes were ...

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How does the cement fineness affect the concrete strength ...

The rate of hydration depends on the fineness of cement particles. More the fineness of the cement is, more rapid is the development of strength of concrete. The fineness of cement is measured in terms of specific surface. Specific surface is expr...

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Quality and Durability of Concrete

It is observed that, because of insufficient quantity of good quality flyash, the cement manufacturers are grinding the coarse flyash to the required fineness to produce PPC of minimum fineness of 300m 2 /kg. By this process, the "ball-bearing effect" of the spherical shape of the flyash particles is lost, and consequently, the beneficial ...

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Cement Standards and Concrete Standards

Cement Standards and Concrete Standards. ASTM's cement and concrete standards are instrumental in the evaluation and testing of concrete, cement, and aggregates. Concrete can have different properties depending upon the mixture that is used in creating it, which contains cement, chemical admixtures, and aggregates.

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Variation in Fineness of Portland Cement and its Effects ...

4) High strength concrete was developed by using the same brand of cement available in market (having fineness value of 2975 cm2/g).Six trials were made to design the concrete mix. Concrete with water cement ratio, 0.28 and mix proportion of 1:0.75:1.75 with 1.7% by weight of cement super plasticizer was selected. 5) 6 concrete mixes were prepared by using Mix.

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FINENESS OF CEMENT - T Square Civil Engineering

Jul 02, 2021  Apparatus Required 90-micron sieve Weigh balance Tray The procedure of the test Weigh accurately 100gms of Cement in a tray. Place on a standard IS Sieve 90 microns, breaking down any air set lumps in cement samples if any. Continuously sieving the sample by holding the sieve in both hands with gentle wrist motion for Continue reading FINENESS OF CEMENT

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Fineness of Cement – Definition – Test - Definecivil

Mar 23, 2021  Fineness of cement Definition. Fineness of cement is an important physical property of cement that defines the particle size and the surface area of cement particles. It is expressed in %age when determined as a modulus with sieving or units of cm2/gm or m2/kg in case when determine by Blaine air permeability apparatus.

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How does the cement fineness affect the concrete strength ...

The rate of hydration depends on the fineness of cement particles. More the fineness of the cement is, more rapid is the development of strength of concrete. The fineness of cement is measured in terms of specific surface. Specific surface is expr...

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MANUAL on CONCRETE LABORATORY - VSSUT

Concrete is one of the most widely used construction material throughout the world. It is obtained by mixing together cement, aggregates, water and sometimes admixtures. The mixture when placed in forms and allowed to cure, it hardens into a rock like mass. The quality of concrete is exclusively dependant on the quality of its ingredients and the

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Effect of Fineness of Sand on the Cost and Properties of ...

To find out the effect of fineness modulus (FM) of sand on concrete, sand of different FM from 2.0 to 3.0 is chosen. Two sizes of coarse aggregate particles: i.e. 20 10 mm, which are generally used in standard concrete mix, were chosen for the investigations. Concrete Mix Selected: Concrete Grade : M30 Water-Cement Ratio : 0.45

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Too Much Fineness Of Cement (a) Results Cracks In Concrete ...

Description : According to the rule of water cement ratio, the strength of concrete wholly depends upon. (a) The quality of cement. (b) The quality of cement mixed with aggregate. (c) The amount of water used in preparation of concrete mix. (d) All of the above. Answer : (c) The amount of water used in preparation of concrete mix.

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(PDF) CONCRETE LABORATORY MANUAL Jayashree Sengupta ...

Finer cement offers a greater surface area for hydration and hence the faster and greater the development of strength. Increase in fineness of cement is also found to increase the drying shrinkage of concrete. Fineness of cement is tested either by sieving or by determination of specific surface by air- permeability apparatus.

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Testing cement for quality and reliability

Jan 02, 2018  The expansion of cement can also be determined by the length comparator method. The length comparator is a device used for measuring length changes of cement paste, mortar and concrete in accordance with ASTM and AASHTO specifications. The unit consists of a sensitive dial or digital indicator mounted on a sturdy, dual post construction frame.

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Properties of Concrete - Workability, Setting, Bleeding ...

Mar 19, 2017  Following are the factors that affect the setting of concrete. 1. Water Cement ratio 2. Suitable Temperature 3. Cement content 4. Type of Cement 5. Fineness of Cement 6. Relative Humidity 7. Admixtures 8. Type and amount of Aggregate. 2. Workability of Concrete

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(PDF) Importance of Consistent Cement Quality for a ...

S. Ahamed and L. A. Qureshi, "Variation in fineness of fetco cement and effects on other properties of cement and concrete," presented at 29 th conference on our world in concrete structures ...

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Concrete Ingredients And Its Properties Construction Civil

Demands strict quality control; Concrete Ingredients – Cement: It is necessary to use cement as concrete ingredients of appropriate grade and type for specific applications and environmental conditions. The following varieties of cement for concrete

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What is Workability of Concrete? - Factors Affecting ...

The quantity of water is usually expressed in litre per bag of cement. if water required for one bag of cement is 30 litres, the water-cement ratio is equal to 30/50 = 0.6. The water-cement ratio should be such that it should impart a reasonable degree of workability to concrete, excess water affects the durability and strength of the concrete.

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Properties of Cement- Everything you need to know Cement ...

Jul 11, 2020  FINENESS OF CEMENT. Fineness is the measure of the particles of cement or the specific surface area of cement. The hydration rate of cement is directly related to its fineness. Higher the fineness of cement higher is the specific surface area available per unit volume of cement. ie More area is available for cement and water action (hydration).

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Cement Fineness Concrete Construction Magazine

Aug 01, 1970  Increasing the fineness of cement reduces the amount of bleeding in concrete. This is more pronounced for concrete containing no entrained air. 2. Increasing the fineness of cement from 2700 to about 4000 cm2/g reduces the water requirement of concrete. Increasing the fineness of cement beyond an optimum limit increases the water requirement of ...

get price

What is the Fineness of Cement It's Test and Effects ...

Apr 12, 2020  A Fineness of Cement is Measure of the size of Cement Particle, and it is described in terms of the specific surface area of Cement particle. The Fineness of cement can be Calculated by particle size analysis, by using the air permeability method, by using sedimentation method.

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What is the significance of Fineness of Cement? - The ...

Nov 17, 2020  The fineness of cement is the property of cement which indicates particle size and specific surface area. Significance: The cement hydrates with the presence of water. When cement is mixed with water, a layer is formed around the particles. The layer becomes bigger in size and makes the cement particles to separate.

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Investigation of effects of Portland cement fineness and ...

Jul 30, 2017  For 0.35 water:cement ratio concrete, for example, 28-day strengths increased from 61 to 74 MPa as cement fineness increased from 275 to 385 m 2 /kg. With respect to effects of alkali content, the opposite trend was observed, with compressive strength generally decreasing with

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Effect of Sand Fines and Water/Cement Ratio on Concrete ...

used for mixing the concrete will be absorbed by the aggregate to keep it at the saturated surface dry state and the rest for mixing the concrete and hydration of cement. The water absorption of coarse aggregate was 0.5% which was within the normal range from0.1 to 0.6%.The fineness

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MANUAL on CONCRETE LABORATORY - VSSUT

Concrete is one of the most widely used construction material throughout the world. It is obtained by mixing together cement, aggregates, water and sometimes admixtures. The mixture when placed in forms and allowed to cure, it hardens into a rock like mass. The quality of concrete is exclusively dependant on the quality of its ingredients and the

get price

Effect of Fineness of Sand on the Cost and Properties of ...

To find out the effect of fineness modulus (FM) of sand on concrete, sand of different FM from 2.0 to 3.0 is chosen. Two sizes of coarse aggregate particles: i.e. 20 10 mm, which are generally used in standard concrete mix, were chosen for the investigations. Concrete Mix Selected: Concrete Grade : M30 Water-Cement Ratio : 0.45

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1 Lab Manual of Concrete Technology

while 3-25 micron fraction has a major influence on the 28 days strength. Increase in fineness of cement is also found to increase the drying shrinkage of concrete. Fineness of cement is tested in two ways : (a) By sieving. (b) By determination of specific surface (total surface area of all the particles in one gram of cement

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(PDF) Importance of Consistent Cement Quality for a ...

S. Ahamed and L. A. Qureshi, "Variation in fineness of fetco cement and effects on other properties of cement and concrete," presented at 29 th conference on our world in concrete structures ...

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Too Much Fineness Of Cement (a) Results Cracks In Concrete ...

Description : According to the rule of water cement ratio, the strength of concrete wholly depends upon. (a) The quality of cement. (b) The quality of cement mixed with aggregate. (c) The amount of water used in preparation of concrete mix. (d) All of the above. Answer : (c) The amount of water used in preparation of concrete mix.

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Monitoring Concrete Temperature in Extreme Weather Conditions

Mar 23, 2018  The amount of heat produced during the reaction is largely related to the composition (Table 1) and fineness of the cement. Download Maturity e-Book Monitoring the temperature of your concrete pour after placement according to ASTM guidelines is one of the most important steps in the construction of a concrete structure.

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Properties of Cement- Everything you need to know Cement ...

Jul 11, 2020  FINENESS OF CEMENT. Fineness is the measure of the particles of cement or the specific surface area of cement. The hydration rate of cement is directly related to its fineness. Higher the fineness of cement higher is the specific surface area available per unit volume of cement. ie More area is available for cement and water action (hydration).

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Concrete Mix Design Calculations

concrete decreases. 4 • It’s a calculation: w/c ~ lbs. of water / lbs. of cement w/c m ~ lbs. of water / lbs. of cementitious Water / Cementitious Ratio Often when w/c is discussed its really w/c m that is intended as the reference = Water cement ratio concrete-pipe Water cement ratio Water needs to be drinkable or meet ASTM 1602

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Concrete Mix Design Manual Rev08-19 - NCDOT

Portland cement is the most common hydraulic cement used in concrete on NCDOT projects. It is composed primarily of calcium silicates, with a smaller proportion of calcium aluminates. By definition, the composition of portland cement falls within a relatively narrow band.

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