Aggregate Crushing Value (ACV). However, ... point load test apparatus and procedure enables economical testing of core or lump rock samples in either a field or laboratory setting. In order to ...
Citation preview. DEPARTMENT OF CIVIL ENGINEERING BACHELOR IN CIVIL ENGINEERING (HONS) BEC 307 HIGHWAY LABORATORY LAB REPORT: DETERMINATION OF AGGREGATE CRUSHING VALUE GROUP: E2 SEPT / OCT SEMESTER 2016 SUBMISSION DATE 10 JANUARY 2017 LECTURER'S NAME SYED …
What is an aggregate crushing value? The resistance capacity of aggregate under gradually applied compression load is known as aggregate crushing value. The test …
Sampling of Aggregates. Select coarse aggregate that passes through a 12.5mm IS sieve and is retained on a 10mm IS sieve. Heat the aggregate at 100 to 110°C for 4 hours, cool it to room temperature, and ensure that the material depth in the cylinder, after tamping as described below, is 10 cm. Determine the appropriate quantity by filling …
The top surface of the measuring cylinder filled with the three layers of the sample is then levelled with the help of the tamping rod. Now the sample is poured in a pan and total weight of aggregate required to fill the measuring cylinder is weighed and recorded as W1.
Aggregate Crushing Value = 100(W2/W1) percent where: W2 = Weight of fraction passing the appropriate 2.36 mm sieve. W1 = Weight of dry sample. Normally, the percentage of fines should fall between 7.5 and 12.5. If it falls outside this range, conduct a new test at a load adjusted to bring the percentage of fines within the range of 7.5 to 12.5.
The Aggregate Crushing Value (ACV) test is a fundamental measure of a material's resistance to crushing under a compressive load. It is widely used in the construction industry to assess …
The aggregate crushing value test provides resistance of an aggregate to crushing under a gradually applied compressive load. To construct a high-quality pavement, aggregate possessing low aggregate crushing value …
A laboratory aggregate test program was carried out to evaluate the polishing/friction and crushing performance of 25 different aggregate sources from different locations. ... The Aggregate Crushing Value Test (British standard 812–110) is used to assess the aggregate crushing resistance by gradually ramping a compressive …
Calculate the Aggregate Crushing Value (ACV) expressed as a percentage to the first decimal place, of the mass of fines formed to the total mass of the test specimen from …
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.
The Aggregate Impact Value (AIV) (M2/M1)x100 19 % 23 %. AIV = M2/M1 * . Average aggregate impact value of the sample is 21 %. DISCUSSION 1. Give the impact value of a good aggregate to ensure the strength of the. aggregate used in road construction. -Aggregate impact value is measure of toughness of aggregate.
Aggregate Crushing Value Test. The objective of this test is to: Determine the aggregate crushing value of coarse aggregate. Assess suitability of coarse aggregates for use in different types of road. Apparatus. A steel …
Aggregate Impact Test. Read definition, apparatus, IS code, procedure, observations, formula, result and lab report about aggregate impact value test.
The aggregate crushing value, which is an inverse measure of ... Each aggregate sample was tested in the laboratory for crushing value and impact value following the specification
Observations of Los Angeles Test Original weight of aggregate sample = W 1 g Weight of aggregate sample retained = W 2 g Weight passing 1.7mm IS sieve = W 1 - W 2 g Abrasion Value = (W 1 - W 2 ) / W 1 X 100 Results Los Angeles Abrasion Value = Recommended Los Angeles Test Values for Pavements Los Angeles test is commonly …
000433 - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document describes the aggregate crushing value test procedure which is used to determine the resistance of aggregate samples to crushing under gradually applied loads. The test involves applying a 40 tonne load to aggregate samples contained in a metal …
The test requires samples of the aggregate to be subjected to standard load crushing conditions. Multiple layers of presieved materials are tamped 25 times before a 40-ton load is applied at a rate of 4 tons per minute. The crushed aggregate is then sieved, weighed, and compared to the original total weight to provide an aggregate crushing …
aggregate and crushed stone coarse and fine aggregate are produced by crushing natural stone. Crushing, screening, and washing may be used to process aggregates from either sand and gravel deposits or stone quarries. ... with typical range values, are shown in Table 2. Coarse and fine aggregates are generally sieved separately. That portion of ...
AGGREGATE CRUSHING VALUE TEST 1. Objective The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually …
The test aims at looking for the forces required to produce 10% of fine values (i.e. weight of fines aggregates/weight of all aggregates = 10%). This test is very similar to Aggregate Crushing Test in which a standard force 400kN is applied and fines material expressed as a percentage of the original mass is the aggregate crushing value.
During the laboratory the dry test was conducted, that is, the aggregate was in surface dry condition. The procedure was followed up to giving results of the tests. These tests are a measure of the crushing properties of the aggregate. Two tests were carried out for the aggregate crushing value (ACV) and the mean obtained gave the crushing value.
To achieve a high quality of pavement, aggregate possessing low aggregate crushing value should be preferred. With aggregate of an aggregate crushing value higher than 30 the result may be anomalous and in such as the ten percent fines value should be determined instead SAMPLING The standard aggregate crushing test shall be made …
The document summarizes an aggregate crushing value test lab report. The objective was to determine the suitability of coarse aggregates for use in different types of roads by assessing their resistance to crushing under load. The sample was tested according to procedure using an aggregate crushing value machine. The aggregate crushing …
This ratio is known as the Aggregate Crushing Value (ACV) and can be calculated using the following formula: Aggregate Crushing Value (ACV) = (W2 x 100) / (W1 - W) Example limits. Here is a list of the Aggregate Crushing Value limits for different types of road construction: Types of Roads / Pavements: Flexible Pavements. Water …
The aggregate crushing value (ACV) of an aggregate is the mass of material, expressed as a percentage of the test sample. which is crushed finer than a 2,36 mm sieve when a sample of aggregate passing the 13,2 mm and retained on the 9,50 mm sieve is subjected to crushing under a gradually applied compressive load of 400 kN. 2 APPARATUS 2.1 …
Determination of aggregate crushing value ... 10 Test report ... Reduce the laboratory sample to produce a test portion of sufficient mass to produce three test specimens of 14 mm to 10 mm size fraction. NOTE A single test specimen is that quantity of material required to fill the cylinder (see 8.1 and Table 2). ...
The original weight of the aggregate sample = W1 g The weight of the aggregate sample retained = W2 g Weight sample passing 1.7mm IS sieve = W1 – W2 g. Abrasion Value Formula. Abrasion Value = (W1 – W2 ) …
