Procedure of Aggregate Impact value test. The test sample: normally aggregates sized 10.0 mm to 12.5 mm. the aggregates should be dried by heating at 100-110 0C for a period of 4 hours and cooled.
Aggregate impact value = (B/A) x 100% iii) Two such tests should be carried out and the mean of the results should be reported. Saurav Sadhukhan November 2, 2015 at 10:35 am. What is the practical implementation of the test? How are the test conditions experienced in real life? Reply Link Quote. Prasad November 10, 2015 at 3:11 am.
Determination of Aggregate Impact Value – Impact Test on Aggregates is done to carry out to: Determine the impact value of the road aggregates, Assess their suitability in road construction on the basis of impact value. Contents:1 Aggregate Impact Value on Coarse Aggregates1.1 Apparatus for Aggregate Impact Test1.2 Theory of Aggregate Impact ...
Experiment No. 4: Determination of the aggregate impact value of different coarse aggregate samples. (BS 812) Scope & significance: Aggregate Impact Value The aggregate impact value gives a relative measure of the toughness or the resistance of aggregate sudden shock or impact is not proportional to the resistance to a slowly applied compressive load.
23/1/2018· A sample proforma for the record of the test results is given in the below table. APPLICATION S OF AGGREGATE IMPACT VALUE. Aggregate having AIV % less 50% is better to use in construction where as those having value more than 50% are bad for construction.
AGGREGATE IMPACT VALUE TEST
Aggregate Impact Value Test. AIV test is conducted to determine the Aggregate Impact Value of Coarse aggregate. 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 …
The value of aggregate impact test should not be more than 45% by weight of aggregates, used for concrete other than wearing surface. An impact value 35% is permissible for the bituminous macadam. Maximum permissible impact value for the water bound macadam is 40%.
7.6.7.3 Results. Calculate the mean of the two values determined in (a) or (b) of 7.6.6.2 to the nearest whole number. Report the mean as the aggregate impact value, unless the individual results differ by more than 0.15 times the mean value. In this case repeat the test on two further specimens, calculate the median of the four results to the ...
Results: The mean of the three results is reported as the AIV (Aggregate Impact Value) of the specimen to the nearest whole number. Limits : < 10% Exceptionally strong, 10–20% Strong, 20–30% Satisfactory for road surfacing & > 35%Weak for road surfacing.
Results: The mean of the three results is reported as the AIV (Aggregate Impact Value) of the specimen to the nearest whole number. Limits : < 10% Exceptionally strong, 10–20% Strong, 20–30% Satisfactory for road surfacing & > 35%Weak for road surfacing.
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.
8/12/2017· In this video , we will see the procedure of determining aggregate impact value as per IS 2386 PART4.
Table 5.4 presents the statistical data of the LA abrasion mass loss, aggregate crushing value (ACV) and aggregate impact value (AIV) obtained from 307 RA samples. As expected, the LA abrasion results suggest that the resistance to fragmentation of RA, in descending order, is RCA, MRA and RMA. However, this trend is not clear in the case of AIV and ACV.
In this test we will find out the percentage of the weight of the aggregate sample which gets crushed with respect to the total weight of the sample. This percentage is known as the aggregate impact value and more the aggregate impact value less is the toughness of the road aggregates and vice verse.
The aggregate impact value is expressed as the percentage of the fines formed w.r.t the total weight of the sample Aggregate Impact Value (AIV) = (100*M2)/M1 Where: M1 =Mass of the test specimen M2 = Mass of the test specimen passing 2.36 mm test sieve
Los Angeles abrasion test on aggregates is the measure of aggregate toughness and abrasion resistance such as crushing, degradation and disintegration. This test is carried out by AASHTO T 96 or ASTM C 131: Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine.
5.16 The Heavy Impact Value has application to testing the same materials as those tested by the standard, light, medium, and heavy medium heavy impact soil testers, but the greater mass of this impact soil tester provides less sensitivity of the output so is applicable for harder materials at the top end the scales or beyond the ranges of the lighter impact soil testers.
The aim of aggregate impact test is to determine the relative measure of the resistance of aggregate to sudden shock or impact in which in some aggregate differs from its resistance to a slowly applies compressive load. The property of a material ...
The net weight of aggregate in the measure shall be determined to the nearest gram and this weight of aggregate shall be used the duplicate test on the same material. Test Procedure: The impact machine shall rest with out wedging or packing upon the level plate, block or floor, so that it is rigid and the hammer guide columns are vertical.
Results The mean of the two results is reported as the aggregate impact value of the specimen to the nearest whole number. Aggregate impact value is to classify the stones in respect of their toughness property as indicated below: Aggregate impact values < 10% Exceptionally strong:.
estimating the impact of unknown unknowns on aggregate query results. A na ve solution for the SUM query from Section 1.2 would be to rst estimate the number of un-known data items using species estimation techniques [46] and then use mean substitution to estimate their value [37]. This assumes that the missing items have on average the
Concept and significance of the Aggregate crushing value test. The ‘ aggregate crushing value test ` gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. Aggregate crushing value is defined as the percentage by weight of the crushed (or finer) material obtained when the test aggregates are subjected to a specified load under ...
Impact test The aggregate impact test is carried out to evaluate the resistance to impact of aggregates. Aggregates passing 12.5 mm sieve and retained on 10 mm sieve is filled in a cylindrical steel cup of internal dia 10.2 mm and depth 5 cm which is attached to a metal base of impact testing machine.
number. Report the mean as the aggregate impact value, unless the individual results differ by more than 0.15 times the mean value. In this case repeat the test on two further specimens, calculate the median of the four results to the nearest whole number, and report the median as the aggregate impact value.
number. Report the mean as the Aggregate Crushing Value, unless the individual results differ by more than 0.07 times the mean value. In this case repeat the test on two further specimens, calculate the median of the four results to the nearest whole number and report the median as the Aggregate Crushing Value. A data sheet is given as Form 7.7.1.
27/3/2020· AGGREGATE IMPACT VALUE TEST AIM: To find Impact value of the given aggregate sample. APPARATUS The apparatus consists of an impact-testing machine, a cylindrical measure, tamping rod, IS sieve, balance, tamping rod and oven. PROCEDURE The test sample consists of aggregates passing 12.5 mm...
Aggregate Impact Value Test offered by Harjai And Company, a leading supplier of Aggregate Impact Tester in Ajmeri Gate, Delhi, . The Company was incorporated in 1991 and is registered with IndiaMART. | ID: 4857966897
A sample proforma for the record of the test results is given below.. As per IS 283-1970 aggregate impact value shall no exceed 45% by weight for aggregates used for concrete other than wearing surface and 30% for concrete of wearing surfaces (Run …
has been harmonised throughout the European Union. Some familiar aggregate tests previously used in the UK and Ireland, such as Aggregate Crushing Value, Ten Percent Fines Value, Aggregate Impact Value, and Wet Attrition Value, have been withdrawn from use, and do not now have the status of a national standard.
Location
CONTACT INFO