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The particle size distribution of the coarse aggregate is termed as "Gradation". The sieve analysis is conducted to determine this particle size distribution. Coarse aggregate used in making concrete which contain aggregate of various sizes. A wel...

Keep ReadingBut the manufactured aggregates means the natural aggregates are processed to produce new size & quality aggregates which are suitable for different construction activities. The coarse aggregates are manufactured in different sizes like 10 mm, 12 mm, 20 mm, and now manufactured sand is also available instead of river sand.

Keep ReadingFine aggregate is also known as sand. 2) Coarse aggregate:- The aggregate whose size is greater than 4.75 mm is known as coarse aggregate. Stone is also known as coarse aggregate. The size of aggeregates comonly used for prepairing different grade of concrete are given below.

Keep ReadingSize of Coarse Aggregate Materials that are large enough to be retained on the 4.7mm sieve size usually constitute coarse aggregates and can reach a maximum size of 63mm. The size of coarse aggregates affects several aspects of the concrete, mainly strength and workability, and the amount of water needed for the concrete mix.

Keep ReadingMar 23, 2015· 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 Concrete. The following conditions decide the maximum size of coarse aggregate to be used in concrete

Keep ReadingTo this end, a synthesis of experimental studies with different recycled coarse aggregate (RCA) substitute rates (0%, 30%, 50%, 70% and ), different prismatic sizes of 70 × 70 × 210, 100 × 100 × 300, 150 × 150 × 450 and 200 × 200 × 600 mm are carried out to investigate the size effect of RAC with consideration of the influence of ...

Keep ReadingCoarse 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 ...

Keep ReadingThe Coarse Aggregate Test (ASTM C127 and AASHTO T 85) is simply a volume determination by displacement of water. A basic test can be performed with a woven-wire basket and water container, or the complete test can be performed more efficiently using a specific gravity bench for suspended weighing of the specimen from an electronic balance.

Keep ReadingA. 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 slabs. (iii) three-fourths the minimum specified clear spacing between individual reinforcing bars or wires ...

Keep ReadingApr 11, 2020· Source: ASTM Standard C33/C33M The second column in the table shows the aggregate size range that is always decided prior to use. For example, if we are to prepare a concrete mix using an aggregate sample that contains a maximum particle size of 63mm and a minimum particle size of 37.5mm, we'll look through the second row and the values present in the columns will brief the …

Keep ReadingUse coarse aggregate that is well graded within the limits and sizes specified in Table 800.1. 6. Detrimental Substances a. Detrimental substances include shale, weathered or decomposed rock, friable particles, or any substance that may be detrimental for the use intended.. b. Do not use any aggregate that can cause a deleterious reaction. c.

Keep ReadingDec 02, 2017· In this video you will learn how to decide the maximum size of aggregate for concrete work. The maximum size of aggregate for concrete in residential buildin...

Keep ReadingCoarse 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.

Keep ReadingAPPENDIX D — INDOT COURSE AGGREGATE SIZE SPECIFICATIONS Sieve Sizes Coarse Aggregate Sizes (Percent Passing) Coarse Graded Dense Graded 2 5 8 9 11 12 431 91 531 731 4 in. (100 mm) 3½ in. (90 mm) 2½ in. (63 mm) 100 2 in. (50 mm) 80-100 1½ in. (37.5 mm)

Keep ReadingJun 04, 2021· Nominal maximum size of an aggregate is the smallest sieve size through which the major portion of the aggregate must pass. The nominal maximum-size sieve may retain 5% to 15% of the aggregate depending on the size number. Amount of cement required decreases as the maximum size of coarse aggregate increases.

Keep Readingincrease in aggregate size results in a decrease in the compressive strength of concrete. Cook (1989) showed that, for compressive strengths in excess of 69 MPa (10,000 psi), smaller sized coarse aggregate produces higher strengths for a given water-to-cement ratio. In fact, it is generally agreed that, although larger coarse aggregates can be used

Keep ReadingStandard Sizes of Coarse Aggregate Amounts Finer than Each Laboratory Sieve (Square Openings), weight percent Size No. Nominal Size Square Openings 4 inches 3 1/2 inches 3 inches . 2 1/2 inches 2 inches . 1 1/2 inches 1 inch . 1 . 3 1/2 to 1 1/2 inches 100 ; 90 to 100 - 25 to 60 - 0 to 15 - 2 . 2 1/2 inches to 1 1/2 inches - - 100 :

Keep ReadingSep 27, 2021· The scope of sieve analysis is to get or provide information about the particles size distribution of coarse aggregates. Coarse Aggregates. Coarse aggregates are those aggregates that are retained on a 4.75mm sieve when they are sieved through 4.75mm. Standard. ASTM C136-05. …

Keep ReadingSize numbers (grading sizes) for coarse aggregates apply to the amounts of aggregate (by mass) in percent-ages that pass through an assortment of sieves (Fig. 5-5). For highway construction, ASTM D 448 (AASHTO M 43) lists the same 13 size numbers as in ASTM C 33. 81.

Keep ReadingThe 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.

Keep ReadingAug 30, 2021· The largest coarse aggregates should be given priority according to the feasibility of the structure. According to IS-456; the maximum size of aggregates that can be used in PCC and RCC are: a.1/4 th of the minimum dimension of the concrete member. b. 1/5 th of the minimum dimension of the reinforced concrete member.

Keep Reading2.1.2 Crushed Stone Sand - Fine aggregate produced by crushing hard stone. 2.1.3 Crushed Grace1 Sand - line aggregate produced by crushing natural gravel. . 2.2 Coarse Aggregate -- Aggregate most of which is retained on 4*75-mm IS Sieve and containing only so much finer material as is permitted for

Keep ReadingCoarse aggregates are particles less than 4.75 mm in size; for larger aggregates, however, the range can be found from 9.5 mm and 37.5 mm in diameter. Fine aggregates, on the other hand, are so small in scale that they can pass through a 9-mm sieve.

Keep ReadingCoarse aggregate is one of the essential components of concrete and occupies the largest volume in the mix. That is why it greatly affects the concrete mix design. Its properties such as strength, maximum size, shape, and water absorption influence water demand, the quantity of cement and fine aggregate in concrete mixture.

Keep ReadingFine 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 …

Keep ReadingNov 04, 2020· Figure 1. According to ACI-318/5 [3.3.2], the nominal maximum size of coarse aggregate shall not be larger than: 1/5 the narrowest dimension between sides of forms, nor. 1/3 the depth of slabs, nor. 3/4 the minimum clear spacing between individual reinforcing bars or wires, bundles of bars, individual tendons, bundled tendons, or ducts.

Keep ReadingTypically, coarse aggregate sizes are larger than 4.75 mm (5 mm in British code), while fine aggregates form the portion below 4.75 mm. A maximum size up to 40 mm is used for coarse aggregate in most structural applications, while for mass concreting purposes such as …

Keep ReadingThe maximum size of coarse aggregate that can be used in a mix depends on the size, shape, and reinforcing of a member, based on these "not-to-exceed" guidelines (see Photos 5 and 6): 3/4 of the clear spacing between rebar or between rebar and forms (cover distance)

Keep ReadingJul 10, 2020· 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. Because the aggregates are formed due to natural disintegration of rocks or by the artificial crushing of rock or gravel, they ...

Keep ReadingWhich size coarse aggregate is ideal for use in a concrete mix? a) Smaller b) 4.75-10mm c) Larger d) 10-20mm. View Answer & Solution. Answer: c Explanation: Using the largest size will result in a reduction of cement, water and shrinkage in the concrete mix. 6 - Question. Elongation index of coarse aggregates is calculated using:

Keep ReadingCoarse Aggregate Size. Coarse aggregates are any particles greater than 0.19 inch, but generally range between 3/8 and 1.5 inches in diameter. Gravels constitute the majority of coarse aggregate used in concrete with crushed stone making up most of the remainder. Size of …

Keep ReadingMay 25, 2020· 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 …

Keep ReadingAnswer: There is a range defined for classification of aggregate. So according to sieve size, the aggregate passing through 4.75mm sieve is termed as fine aggregate and retained on 4.75 mm sieve is termed as coase aggregate. So the range of coarse aggregate is 4.75mm to …

Keep ReadingTamping rod of 16 mm size and length 600 mm. 4) Tamping rod:- tamping rod is 16mm rounded bar of length 600 mm which have tamping nose at one end and second end is rounded and used applying strokes in different layer of coarse aggregate. Test procedure for finding loose bulk density. Test procedure for finding loose bulk density procedure are following

Keep ReadingThe 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.

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