using a 4 20 mm coarse aggregate

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HOW TO CLASSIFY AGGREGATES ACCORDING TO SIZE?

 · It is the aggregate composed of both fine aggregate and coarse aggregate. According to size All-in-aggregate is described as all-in-aggregates of its nominal size, i.e. 40mm, 20mm etc. For example, all in aggregate of nominal size of 20mm means an aggregate most of which passes through 20 mm IS sieve and contains fine aggregates also.

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Practical Grading of Aggregates | Concrete Technology

Zone II represents medium sand, generally suitable for the standard 1:2 fine to coarse mix, when the maximum size of coarse aggregate is 20 mm. The choice of correct proportion is particularly important as the grading of the sand approaches the fine outer limit of zone 4 or the coarse outer limit of zone I.

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Aggregates

Fine Aggregate The other type of aggregates are those particles passing the 9.5 mm (3/8 in.) sieve, almost entirely passing the 4.75 mm (No. 4) sieve, and predominantly retained on the 75 µm (No. 200) sieve are called fine aggregate. For increased workability and for economy as reflected by use of less cement, the fine aggregate should have a rounded shape.

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The Effect of Aggregate Size on The Strength of Concrete

using coarse aggregate 10mm, 20mm and fine aggregate (sand mining) 3mm, randomly purchased from suppliers. These samples were test using with the mixing ratio of 1: 2: 4 and water cement ratio is set 0.5. Cement used was Ordinary Portland

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JP2010228947A

Provided are a coarse aggregate for high-strength concrete and a high-strength concrete using the coarse aggregate. [Selection] Figure 1 【Task】 Conventionally, there are only JIS standards for coarse aggregate for concrete, such as water absorption rate and absolute dry density.

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Concrete Mix Design

aggregate using Fig. 11.5. Fig. 11.5(a) is for 10 mm size, 11.5(b) is for 20 mm size and Fig. 11.5(c) is for 40 mm size coarse aggregate. The parameters involved are maximum size of coarse aggregate, the level of workability, the water/cement ratio, and

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What is bulk density and % voids of coarse aggregates

W2= weight of cylindrical metal measure filled with loosely coarse aggregate of size 20 mm = 32.56 kg 4) now calculating the net loose weight of coarse aggregate of size 20 mm by subtracting weight of empty cylindrical metal measure from the the weight of cylindrical metal measure filled with loosely coarse aggregate

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(PDF) Properties of Porous Blocks Using Different Sizes …

Accepted 20 September 2014 Two coarse aggregate sizes were selected; passing 8 mm retains 5 mm and passing 10 mm retains 8 mm. Fine aggregate was eliminated from being mixed. Compressive strength, porosity and skid resistance tests were performed to evaluate the properties of PCPB.

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Study of Properties of Sustainable Concrete using Slag and Recycled Concrete Aggregate

mix proportion was carried out for a slump of 100 ± 20 mm als required for 1m3 of conventional M30 concrete mix is given below. Quantity of materials Quantity Cement (kg/m3) 400 Fine aggregate(kg/m3) 819 Coarse aggregate(kg/m3) 1072 Water(l/m3l/m3

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Need for a suitable aggregate, and about coarse aggregate …

Grading zone of coarse aggregate. The size of the coarse aggregate varies from 4.75 mm to 80 mm. And we use the graded aggregate in our concrete mix design. Graded aggregate means aggregates of all sizes with different proportion are available in that particular grading, so …

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Corrosion risk assessment of structural concrete with …

 · The concrete was crushed to a 40 mm down product, which was later processed to remove the fines content (d < 4 mm) and larger aggregates (d > 20 mm) to obtain a coarse CCA conforming to ''type A'' aggregates suitable for concrete ().

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4/20 mm aggregate

Sub-base transfer layer: 4-20 mm coarse graded angular aggregate to BS EN 13242:2002 (not crushed concrete). Sub-base main drainage layer: 4-40 mm... Read more

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What is the weight of a 20-mm coarse aggregate in 1 …

If talking in general terms it''s about 1500–1750kg per cum. For accurate calculation, we will be needing Bulk density of Agg and Vol of air and specific gravity of Aggregate

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Coarse Aggregates: Types, Properites & Applications

The size of the coarse aggregate depends on the use of the concrete is to be poured. For large-scale concreting operations without complex reinforcement, large aggregates of size 80 mm, 40 mm, 20 mm are used. For the simple construction of residential or other buildings, 20 mm …

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Influence of size of aggregates on the Compressive strength of …

workability (slump) increased with increasing aggregate size. The concrete made from the 10 mm, 12mm and 15 mm aggregate sizes had workability (slumps) of 10 mm, 15 mm and 20 mm, respectively. The mean compressive strength for the 10 mm, 12

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Angularity Number Test for Coarse Aggregate, Shape Test …

Angularity Number Test for Coarse Aggregate, Shape Test for Aggregate, IS: 2386 (Part 1)–1963 Hi friends, you are welcomed in the world of Civil Allied Gyan . Here, I have explained about angularity number test for coarse aggregate.

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HOW TO BLEND AGGREGATE USING SURFACE INDEX …

 · Sieves required for sieving = 80 mm, 40 mm, 20 mm, 10 mm, 4.75 mm, 2.36 mm, 1.18 mm, 600 micron, 300 micron & 150 micron. Step-2 Find out the corresponding surface index values for different aggregate grading (refer table-1)

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An experimental study of replacing conventional coarse …

 · Aggregate having maximum nominal size of 20 mm with the specific gravity 2.7, Impact value 17%, Fineness modulus 2.59 and Aggregate crushing value 15.37% was used for conducting the experiment. The physical properties of the coarse aggregate areTable 4.

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Coarse Aggregate: Definition & Density

A typical range for natural coarse aggregate is 2.4 to 2.9, meaning that the coarse aggregate is 2.4 to 2.9 times the density of water. Therefore, multiplying the specific gravity and the density ...

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4-20mm Sub Base Aggregate

4-20mm Sub Base Aggregate Permeable Paving Aggregate to BS EN 13242:2002 Widely Used for installation below permeable paving blocks to ensure the structural load of the paving system is carried and the correct drainage requirements are obtained.

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Coarse Aggregates: Types, Properites & Applications

Coarse aggregates are obtained from stone quarries and stone crushers, the size between 4.75 mm to 80 mm. Good qualities of an ideal aggregate: A correct aggregate used for the construction of concrete and mortar must meet the following requirements.

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Gradation of Coarse Aggregate by Sieve Analysis

The graded coarse aggregate is defined by its nominal size i.e., 40 mm, 20 mm, 16 mm, 12.5 mm, etc. For example, a graded aggregate of nominal size 12.5 mm means an aggregate most of which passes the 12.5 mm IS Sieve.

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How Coarse Aggregate Affects Mix Design of Concrete?

Smaller maximum size of coarse aggregate would require greater fine aggregate content to coat particles and maintain cohesiveness of concrete mix. So, for the same workability, 40mm down aggregate would have lower water/cement ratio, thus higher strength when compared to 20mm down aggregate.

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Effect of the Aggregate Size on Strength Properties of …

Concrete with recycled aggregates of 5∼15 mm (A), 15∼20 mm (B), 20∼30 mm (C), and their combinations were subjected to a series of unconfined pressure tests after curing for 28 days. Based on the results obtained from the tests, an effort was made to study the relationship between the mechanical characteristics of recycled aggregate concrete and aggregate particle size.

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Chapter 4: mix design calculation sheet for 40 N/mm2 concrete …

Maximum aggregate size 20 mm Type of coarse aggregate Crushed Type of fine aggregate Crushed W f = 195 3kg/m3 W c = 225 kg/m W = 32/3W f + 1/3W c = 205 kg/m [When coarse and fine aggregates are of different types] Free-water content3 8-Cement ...

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Sieve Analysis of Aggregates | Ontario Sand, Stone & …

When hand sieving mixtures of coarse and fine aggregate, the material should be separated into two sizes on the 4.75 mm sieve. Any material passing the 4.75 mm sieve from the coarse sieve analysis must be added to the original pass 4.75 mm fraction and thoroughly blended before splitting off the fine aggregate sample for testing.

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Different Types & Sizes of Aggregate for Concrete » …

 · When the aggregate is sieved through 4.75mm sieve, the aggregate passed through it. Natural sand is generally used as fine aggregate, silt, stone dust and clay also come under this category. The purpose of the fine aggregate is to fill the voids in the coarse aggregate and to act as a …

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coarse aggregate | A blog of Civil Engineering

 · Considering 20 mm : 10mm = 0.6 : 0.4 20mm = 701 kg . 10mm = 467 kg . Hence Mix details per m3 Cement = 400 kg Water = 160 kg Fine aggregate = 660 kg Coarse aggregate 20 mm = 701 kg Coarse aggregate 10 mm = 467 kg Admixture = 0.6 % by weight

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