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  • Standard Specification for Concrete Aggregates1

    portions of fine and coarse aggregate and the addition of blending aggregate sizes if required or approved. 1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.5 The text of this standard references notes and footnotes which provide explanatory material.

  • Standard Test Methods for Determination of the Impact ...

    5.1 Impact Value, as determined using the standard 4.5 kg (10 lbm) hammer, has direct application to design and construction of pavements and a general application to earthworks compaction control and evaluation of strength characteristics of a wide range of materials, such as soils, soil aggregates, stabilized soil and recreational turf. Impact Value is one of the

  • Aggregate Impact Value Test - Procedure & Uses - [Civil ...

    How do you calculate the aggregate impact value? The impact value is measured in the ratio between the sieved aggregate of 10mm & 2.36mm aggregates. The aggregate impact value test will be conducted as per the Indian Standard Code IS code 2386 Part 4.

  • Aggregate Impact Value | Weight | Brass

    Aggregate Impact Value (BS 812: Part 3) 1. Objective. To determine the aggregate impact value in the laboratory. 2. Introduction. Impact value of an aggregate is the percentage loss of weight particles passing 2.36mm sieve by the application of load by means of 15 blows of standard hammer and drop, under specified test condition.

  • An introduction to Value-at-Risk

    value determines the strength of the relative movements. The value of the coefficient ranges from -1 to +1, depending on the nature of the relationship. So if, for exmple, the value of the correlation is 0.5, this means that one instrument moves in the same direction by half of the amount that the other instrument moves. A value of zero means

  • 5 Aggregate Specifications and Requirements

    The maximum percentage of absorption allowed by the Standard Specifications is 5.0 percent and applies to aggregate classes AP, AS, A, B, and C only. Abrasion Resistance Abrasion resistance applies only to coarse aggregates. Aggregates vary in their resistance to fracturing under impact (toughness)

  • (PDF) DETERMINATION OF AGGREGATE IMPACT VALUE (AIV) (BS ...

    Scope: This Part of BS 812 describes methods for the determination of the aggregate impact value (AIV) which gives a relative measure of the resistance of an aggregate to sudden shock or impact. Principle A test specimen is compacted, in a

  • Standard Test Methods for Determination of the Impact ...

    5.1 Impact Value, as determined using the standard 4.5 kg (10 lbm) hammer, has direct application to design and construction of pavements and a general application to earthworks compaction control and evaluation of strength characteristics of a wide range of materials, such as soils, soil aggregates, stabilized soil and recreational turf. Impact Value is one of the properties used to evaluate ...

  • How to Determine the Aggregate Crushing Strength Value in ...

    Apr 26, 2018· Calculation of aggregate crushing value. The aggregate crushing value is defined as the ratio of the weight of fines passing through specified IS (here 2.36mm sieve) to the total weight of sample expressed in percentage. W1= Weigh of the total aggregates (Wa-We) W2= Weigh of aggregates passing through 2.36mm IS sieve.

  • Aggregate Impact Value - Civil Engineering

    The apparatus used for determining aggregate impact value of coarse aggregates is Impact testing machine conforming to IS: 2386 (Part IV)- 1963,IS Sieves of sizes 12.5mm, 10mm and 2.36mm, A cylindrical metal measure of 75mm dia. and 50mm depth, A tamping rod of 10mm circular cross section and 230mm length, rounded at one end and Oven.

  • Exp 4 Aggregate Impact Value - Civil Engineers PK

    Aggregate Impact Value. The standard amount of impact is produced by a known weight, i.e. a steel cylinder, falling a set height, a prescribed number of times, onto an amount of aggregate of standard size and weight retained in a mould. Aggregate Impact Values, (AIVs), below 10 are regarded as strong, and AIVs above 35 would normally be ...

  • (DOC) AGGREGATE IMPACT VALUE TEST | hong g.woei -

    The aggregate impact test has been standardized by the British Standard Institution and the Indian Standard Institution. The aggregate impact value indicates a relative measure of the resistance of aggregate to a sudden shock or an impact, which in some aggregates differs from its resistance to a slow compressive load. The method of test covers ...

  • Aggregate Impact value Test Apparatus, Procedure and uses ...

    Jul 01, 2019· The Aggregate Impact Value is the mean of two observations, rounded to a nearest whole number. Precautions. Place the plunger centrally so that it falls directly on the aggregate sample and does not touch the wall of the cylinder in order to ensure that the entire load is

  • Indian Standard - Civil Engineer

    Indian Standard SPECIFICATION FOR APPARATUS FOR AGGREGATE IMPACT VALUE 0. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Institution on 20 December 1979, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by the Civil Engineering Division Council.

  • IMPACT STRENGTH OF BRITTLE MATERIALS (ROCKS)

    Test AIV (Aggregate Impact Value, SS 1974) The AIV (Aggregate Impact Value) is a standard test procedure by which the impact strength of aggregates is tested. Just like in Protodyakonovs test, the material used consists of irregularly shaped particles of the

  • IS 9377 (1979): Specification for apparatus for aggregate ...

    IS I 9377 - 1979 Indian Standard SPECIFICATION FOR APPARATUS FOR AGGREGATE IMPACT VALUE 0. FOREWORD 0.1 This Indian Standard was adopted by the Indian Standards Institution on 20 December 1979, after the draft finalized by the Cement and Concrete Sectional Committee had been approved by

  • Determination of Aggregate Impact Value - Impact Test on ...

    The aggregate impact value is a measure of resistance to sudden impact or shock, which may differ from its resistance to gradually applied compressive load. Procedure o f Aggregate Impact Test The test sample consists of aggregates sized 10.0 mm 12.5 mm. Aggregates may be dried by heating at 100-110° C for a period of 4 hours and cooled.

  • Aggregate Impact Value | Construction Aggregate | Wear

    Faculty : Faculty of Civil and Environmental Engineering Department : Department of Infrastructure and Geomatic Engineering Title : AGGREGATE IMPACT VALUE 1.0 INTRODUCTION Impact value of an aggregate is the percentage loss pf weight of particles passing 2.36mm sieve by the application on load by mean of 15 blows of standard hammer and drop under specified test condition.

  • Road Aggregate 101: Important Stuff

    Road Aggregate 101: Nominal maximum and/or minimum sized stone in mix The nominal size distribution of an aggregate specification is defined as the range of sieve openings through which of the aggregate can pass. Road Aggregate 101: Gradation or distribution of different sized stones Open graded aggregate vs. well graded aggregate.

  • IMPACT STRENGTH OF BRITTLE MATERIALS (ROCKS)

    Test AIV (Aggregate Impact Value, SS 1974) The AIV (Aggregate Impact Value) is a standard test procedure by which the impact strength of aggregates is tested. Just like in Protodyakonovs test, the material used consists of irregularly shaped particles of the -14 + 10 mm size fraction. The weight of the specimen is A.

  • CORRELATION BETWEEN AGGREGATE CRUSHING VALUE

    4000 psi, 5000psi. The process of concrete mix design and determination of Aggregate Crushing Value according to ACI 211.1(ACI 211.1, 2009) and BS 812-110 standards (BS 812-110, 2009)was used in

  • Aggregates for Concrete

    standard ASTM C 33 (AASHTO M 6/M 80) sieves for fine aggregate have openings ranging from 150 µm to 9.5 mm (No. 100 sieve to . 3 8. in.). The 13 standard sieves for coarse aggregate have openings ranging from 1.18 mm to 100 mm (0.046 in. to 4 in.). Tolerances for the dimensions of open-ings in sieves are listed in ASTM E 11 (AASHTO M 92).

  • (PDF) Standard Test Method for Resistance to Degradation ...

    Standard Test Method for Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine 1 Hassan Ali 1. 2 The values stated in SI units are to be regarded as the standard.

  • Aggregate Impact Value | Construction Aggregate | Wear

    Faculty : Faculty of Civil and Environmental Engineering Department : Department of Infrastructure and Geomatic Engineering Title : AGGREGATE IMPACT VALUE 1.0 INTRODUCTION Impact value of an aggregate is the percentage loss pf weight of particles passing 2.36mm sieve by the application on load by mean of 15 blows of standard hammer

  • Aggregate Impact Value test we civil engineers

    Jan 23, 2018· Aggregate Impact Value Tester IS : 2386 (Part-IV) i) Impact testing machine conforming to IS: 2386 (Part IV) 1963. ii) IS Sieves of sizes 12.5mm, 10mm and 2.36mm. iii) A cylindrical metal measure of 75mm dia. and 50mm depth. iv) A tamping rod of 10mm circular cross section and 230mm length, rounded at one end. v) Oven. PREPARATION OF ...

  • Aggregate Impact Value Testing | AIV TEST | Civil ...

    Jan 09, 2018· The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact, which in some aggregates differs from Its resistance to a slow compression load. The Indian Standard CODE IS 2386 (Part IV) 1963 is used for procedure and classification of aggregate by result.

  • Revised Outcome Measures Standard Behavioral Health

    Revised Outcome Measures Standard Behavioral Health Care Accreditation Program ... objective data to track the impact of care, treatment, or services has become a high-profile issue in ... Organizations may also choose to use aggregate data to demonstrate the value that the

  • EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

    basalt or crushed limestone, aggregate sizes of 12 mm ('h in.) or 19 mm (:Y. in.), and coarse aggregate contents with aggregate volume factors (ACI 211.1-91) of0.75 and 0.67. Water-to-cementitious material ratios range from 0.24 to 0.50. Compressive strengths range from 25

  • EFFECTS OF AGGREGATE TYPE, SIZE, AND CONTENT ON

    basalt or crushed limestone, aggregate sizes of 12 mm ('h in.) or 19 mm (:Y. in.), and coarse aggregate contents with aggregate volume factors (ACI 211.1-91) of0.75 and 0.67. Water-to-cementitious material ratios range from 0.24 to 0.50. Compressive strengths range from 25 MPa (3,670 psi) to 97 MPa (13,970 psi).

  • The requirements of AS 2758.1 - 2009

    is shown in Appendix A of the Standard. Figure 1: Impact of aggregate skeleton on water demand. Shows the influence of the void system (aggregate skeleton) on the volume of water required. The more consistent and well graded the particle distribution within the mix, the less free water is needed and the greater the strength and the lower the

  • AGGREGATE TOUGHNESS/ ABRASION RESISTANCE AND

    Performance predictability of the two British tests, impact and crushing, is unknown although they are standard tests. Bullas and West [4] reported the aggregate impact value did not, but the aggregate crushing value did separate suitable and unsuitable aggregate for

  • IS 9377: Specification for apparatus for aggregate impact ...

    In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them.

  • PHYSICAL PROPERTIES OF AGGREGATES

    Physical Properties of Aggregates 4 Coarse Aggregate Angularity Measured on + 4.75 mm material Based on fractured faces fractured surface larger than 25% of aspect ratio ASTM D 5821 Specification requirements depend on: depth of layer within pavement

  • Aggregate Impact - an overview | ScienceDirect Topics

    3.4.10 Aggregate Impact Value. The impact test ( BS 812-112, 1990 ), as in the case of the compaction test ( BS 812-110, 1990), has been taken out of the set of standard tests used for determining the physical properties of aggregates for assessing their suitability for use in construction applications.

  • Cost-benefit analysis for climate change adaptation ...

    the society is the estimation of its aggregate impact. To do so the Net Present Value (NPV) of each alternative must be computed. NPV equals the difference between the PV of the benefits (B) and costs (C): NPV = PV(B) PV(C). The basic decision rule for a single project, relative to the counterfactual, is to

  • IS 5640 (1970): Method of test for determining aggregate ...

    this standard, if the final value, observed or calculated, is to be rounded off, it shall be done in accordance with IS:2-1960t. 1. SCOPE 1.1 This standard covers the procedure for determining the aggregates impact value ofsoft coarse aggregate used for bases and sub-basesof road pavements. 2. APPARATUS 2.0 The apparatus shall consist ofthe ...

  • pdf Download BS 812-112: Testing Aggregates Part 112 ...

    Aggregates, Cement and concrete technology, Impact testing, Mechanical testing, Test equipment, Specimen preparation, Test specimens, Testing conditions, Reproducibility Methods which give a relative measure of the resistance of an aggregate to sudden shock or impact. ; Specifies methods for the determination of the aggregate impact value (AIV) which gives a relative measure of the resistance ...

  • DCC3113 DETERMINATION OF AGGREGATE IMPACT VALUE.

    Dec 15, 2017· Aggregate Impact Value (AIV) is the percentage of fines produced from the aggregate sample after subjecting it to a standard amount of impact. The standard amount of impact is produced by a known weight, i.e. a steel cylinder, falling a set height, a prescribed number of times, onto an amount of aggregate of standard size and weight retained in ...

  • Aggregate Crushing Value (ACV) - Civil Engineering Laboratory

    With aggregate of aggregate impact value higher than 30 the result may be anomalous. Also, aggregate sizes larger than 14 mm are not appropriate to the aggregate impact test. The standard aggregate impact test shall be made on aggregate passing a 14.0 mm BS test sieve and retained on a10.0 mm BS test sieve. If required, or if the standard ...

  • FLAKINESS AND ELONGATION INDEX OF AGGREGATE

    1. A quantity of aggregate shall be taken sufficient to provide the minimum number of 200 pieces of any fraction to be tested. 2. The sample shall be sieved with the sieves specified in Table 1: Size of Aggregate thickness (mm) Thickness Gauge * (mm) Length Gauge ** (mm) Passing through IS Sieve Retained on IS Sieve 63 50 33.90 - 50 40 27.00 81 ...

  • Manual of Aggregate Quality Test Procedures

    and unwashed fine aggregate. 1.2 The values stated in English units are to be regarded as the standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this procedure to

  • Experiment: Mechanical Testing- Impact & Hardness Testing

    (ksi), and CVN is the standard Charpy V-Notch impact test value. 3 Figure 1(a) and 1 (b) Schematic Drawing of a Standard Impact-Testing Apparatus. [Callister, 1991] Background - Statistical Considerations Chauvenet's Criterion

  • Aggregate Impact Value Test, Procedure, Result & Standards

    May 21, 2020· Aggregate impact value is the ratio of the weight of the fraction passing through 2.36 mm (weight W2) by the total weight of the sample (weight W1 + W2). Aggregate Impact Value = (W2/ (W1+W2)) * 100 = 80 gm / 300 gm = 26.67 (Impact Value)

  • Aggregate Impact value Test Apparatus, Procedure and uses ...

    Jul 01, 2019· The Aggregate Impact Value is the mean of two observations, rounded to a nearest whole number. Precautions. Place the plunger centrally so that it falls directly on the aggregate sample and does not touch the wall of the cylinder in order to ensure that the entire load is transmitted on the aggregates.

  • AGGREGATE TOUGHNESS/ ABRASION RESISTANCE AND

    Performance predictability of the two British tests, impact and crushing, is unknown although they are standard tests. Bullas and West [4] reported the aggregate impact value did not, but the aggregate crushing value did separate suitable and unsuitable aggregate for bitumen macadam roadbase.