Aggregate: granular material used in construction. Aggregate may be natural, manufactured or recycled. Aggregate size: description of aggregate in terms of lower (d) and upper (D) sieve sizes (see later text). Coarse aggregate: designation given to the larger aggregate sizes with D greater or equal to 4 mm and d greater than or equal to 2 mm.

(b) Test coarse and fine aggregate for PCC for alkali silica reactivity (ASR) per 902.10. (c) 1.5 if material passing No. 200 sieve is dust of fracture, free of clay or shale. (d) In areas exposed to traffic, manufactured sand shall have a minimum ultimate Dynamic …

Jul 07, 2014· A coarse aggregate which has the sizes of particles mainly belonging to a single sieve size is known as single size aggregate. For example 20 mm single size aggregate mean an aggregate most of which passes 20 mm IS sieve and its major portion is retained on 10 mm IS sieve. All in Aggregate. It is the aggregate composed of both fine aggregate ...

Aug 14, 2018· friends we use different sizes such as 40 mm, 20 mm,10 mm, aggregates so we use theses aggregate in different conditions. In this lecture i discussed these t...

Filler material shall conform to Subsection 703.04(A) - Coarse Aggregate, except grading shall conform to Table 703.04-2 - Grading Requirements. TABLE 703.04-2 - GRADING REQUIREMENTS Sieve Size Coarse Aggregate Modified Size 4 (Percent Passing By Weight) Filler Size 8 (Percent Passing By Weight) 2 Inch 100 1-1/2 Inch 75-100 1 Inch 15-55

Jul 10, 2020· AIM OF THE EXPERIMENT: To determine the gradation of coarse aggregate by sieve analysis. CODE OF REFERENCE: IS 383 (1970): Specification of coarse aggregate and fine aggregate from natural sources for concrete [CED 2: Cement and Concrete] APPARATUS USED: Weight pan. IS Sieve of sizes – 40 mm, 20 mm, 10 mm, 4.75 mm. Round […]

Road Aggregate 101: Gradation or distribution of different sized stones From PennDOT Publication 408, Section 703 .2 – Coarse Aggregate The AASHTO system ranks specs according to size (1-10), with 1 being the largest (all material must pass a 4" sieve) and 10 …

1. The coarse aggregates should be properly graded, and the gradation becomes more and more important as we increase the maximum size of coarse aggregate because of greater voids, which needs to be filled to attain the desired compressive strength. As void fraction increases on increasing the size of aggregates…

Mar 23, 2015· On the other hand in smaller size aggregates the surface area is increased which increases w/c ratio and lower strength is achieved. In general for strength upto 200 kg/cm 2 aggregates upto 40 mm may be used and for strength above 300 kg/cm 2 aggregate upto 20 mm may be used. Conditions That Decide Maximum Size of Coarse Aggregate to be Used in ...

Mar 23, 2015· On the other hand in smaller size aggregates the surface area is increased which increases w/c ratio and lower strength is achieved. In general for strength upto 200 kg/cm 2 aggregates upto 40 mm may be used and for strength above 300 kg/cm 2 aggregate upto 20 mm may be used. Conditions That Decide Maximum Size of Coarse Aggregate to be Used in ...

The coarse aggregate grading limits are given in ASTM C33/ C33M and IS 383 – 1970 – table 2, Clause 4.1 and 4.2 for single size aggregate as well as graded aggregate. Fig. 2: Well, Good, and Gap Graded Aggregate

Jun 30, 2017· According to size coarse aggregate is determined by ranked mixture of its nominal size i.e. 40 mm, 20 mm, 16mm and 12 mm etc. A coarse aggregate which all aggregate passes through a singe IS sieve then it is called coarse aggregate. Example: if 20 mm single size aggregate mean an aggregate most passes through 20 mm IS sieve and its major ...

Sep 18, 2018· As far as gradation goes, coarse aggregates are roughly ten times larger than fine aggregates. There are generally three types of aggregate gradations: Gap Graded. This type of aggregate has coarse aggregate particles that are similar in size but vary in size from the fine aggregate. It pieces together the large aggregate and the fine aggregate.

The size of the aggregate bigger than 4.75 mm is considered as the coarse aggregate i.e. basically, all other aggregates which are retained on 4.75mm IS sieve while sieve analysis is performed. According to sources of coarse aggregates, it can be further classified as: (a) Uncrushed Gravel or Stone: It results from natural disintegration of rock.

Coarse aggregate may be available in several different size groups, such as 19 to 4.75 mm (3/4 in. to No. 4), or 37.5 to 19 mm (1-1/2 to 3/4 in.). ASTM C 33 ("Standard Specifications for Concrete Aggre-gates") lists several such size groups using the simplified practice recommendation (SPR) number designation. The number and size of sieves ...

6. Standard Sizes 6.1 Standard aggregate sizes shall conform to the require-ments prescribed in Table 1 for the size number speciﬁed. Conformance shall be determined by means of laboratory sieves having square openings and conforming to Speciﬁcation E11. 7. Basis of Classiﬁcation 7.1 Classiﬁcation of an aggregate is based upon the size

Jan 15, 2016· For example coarse aggregate has a standard grading requirement for each different size from #1 to #8. A #1 aggregate is a nominal size of 3 ½ to 1 ½ inches and a #8 aggregate is a nominal size of 3/8 to 0.094 inch. More specifically, a #57 aggregate is the combination of #5 and #7 aggregates ranging from 1 to 0.19 inch.

If the total combined quantity of the listed items is less than 10,000 square yards (8000 m 2), ensure that the coarse aggregate is one of the following size: No. 7, 78, 8, 57, or 67. Where No. 7, 78, or 8 size is selected, test the coarse aggregate according to 703.02 .

Jun 06, 2018· Coarse aggregate is the portion of the concrete which is made up of the larger stones embedded in the mix. Concrete contains three ingredients; Water, cement, and aggregate. That aggregate is made of fine sand and coarse gravel.

Coarse aggregates are further grouped into following groups based on size: Type of c oarse aggregate Group –I II Single size aggregate 10 mm to 20 mm 40 mm to 63 mm Graded aggregate 12.5 mm to 20 mm 40 mm Aggregates for Mass concrete Small & Medium Large & Very large iii) All – in – Aggregate

What nominal maximum sizes of aggregate are recommended? Q. What nominal maximum sizes of aggregate are recommended? A. According to 26.4.2.1 (a)(5) of ACI 318-19, nominal maximum size of coarse aggregate shall not exceed the least of (i), (ii), and (iii): (i) one-fifth the narrowest dimension between sides of forms (ii) one-third the depth of ...

The number of sieves is five for the coarse aggregates and ten for all-in-aggregates. It is only six in the case of fine aggregates. Sieve Size for Grading of Aggregates. Coarse Aggregates: 80 mm, 40 mm, 20 mm, 10 mm, IS Nos. 480. Fine Aggregates: IS No. 480, 240, 120, 60, 30 and 15.

Does the use of larger coarse aggregate in a mix tend to produce concrete of higher strength? A recent report by the National Ready Mixed Concrete Association reached the following conclusions: 1. At a given water ratio, within the range employed in most structural concrete, smaller maximum sizes of aggregate will tend to produce higher ...

Approved List Sources of Fine & Coarse Aggregates. The Materials Bureau also maintains the Materials and Equipment Approved List. Contacts: Regional Offices - Material Engineers Materials Supplier Viewer (Approved Aggregate Sources); The Materials Supplier Viewer contains the NYSDOT-Approved Sources of Aggregate for hot mix asphalt and portland cement concrete.

For coarse aggregates, maximum percentage of d can be 10%, 15%, 20% or 35%. For all-in aggregates, d is always zero. For example, coarse aggregate previously called 20mm single size, and suitable for pre-coated chippings, would be designated as:

Fine Aggregate (FA) Coarse Aggregate (CA) 1: Definition: Fine aggregates are small size filler materials in construction. Coarse aggregates are larger size filler materials in construction. 2: Size of Particles: Fine aggregates are the particles that pass through …

Coarse aggregates are classified into two main groups: (i) single-size aggregate and (ii) graded aggregate. Single-size aggregate is based on a nominal size specification. It contains about 85 to 100 percent of the material which passes through that specified size of the sieve and zero to 25% of which is retained in the next lower sieve.

Aggregates are evaluated through tests to determine their suitability for various applications. Mineralogy, grain size and texture, and petrographic description of rock samples are also used to evaluate suitability. Types of Aggregates Coarse Aggregate. Coarse-grained aggregates will not pass through a sieve with 4.75 mm openings (No. 4).

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