Crushing resistance of coarse aggregate is the key to the stability and durability of the skeleton structure of permeable asphalt PA mixture. To determine the technical requirements of crushing value of coarse aggregate used in PA mixture, step-loading compression tests were conducted on the mixtures of PA-13 and a control asphalt mixture AC-13, respectively.
To determine the aggregate crushing value of coarse aggregates as per IS 2386.as per require IS code, thus, it is a suitable to use results in increased consumption of natural aggregate mechanical properties like crushing value, Impact. Read more.
3. Results and Discussions 3.1. Crushed Aggregates Effects on Slumps of Concrete. The Figure 1 depicts slum value of A-1 coarse aggregates for all five groups. For Impact Crushed A-1 coarse aggregates slump values were evaluated for all five groups and it was evident from experiment that, there was a steady decrease in slump value with the decrease of wc ratio.
Coarse aggregate crushing value is the percentage by weight of the crushed material obtained when test aggregates are subjected to a specified load under standardized conditions. Aggregate crushing value is a numerical index of the strength of the aggregate and it
crushing strength, impact value and water absorption value as co mpared to normal concrete. 2. Use of recycled coarse aggregate up to 20 did not affect the functional requirement of
Aggregate Crushing Value - For Coarse Aggregate 21.84 For CS Aggregate 4.71 Aggregate Impact Value - For Coarse Aggregate 7.25 For CS Aggregate 4.26 V. Elongation index For gravels 58.54 For CS Aggregate 50.56 Flakiness index For gravels 15.69 For CS Aggregate 97.19 Grade 7 days 14 days 21
aggregate crushing value of coarse aggregate. Abstract The purpose of this study is to find artificial coarse aggregates and cut stones around Khartoum. To meat the The tests include Specific Gravity SG, water absorption, Los Angeles abrasion test value LAA, Aggregate Impact Value AIV, Aggregate Crushing Value ACV and soundness test.
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. The aggregate used in surface course
Flakiness Index Weight of aggregate passed through width gauge 10 mm to 6.3 mm W2 Total weight of aggregate sample taken W1 W2W1 x 100. For example, Weight of aggregate passed through width gauge of 10 mm to 6.3mm W2 200 gm and Total weight of aggregate sample 1000 gm. Flakiness Index 200 gm 1000 gm x 100 20.
The crushing of disintegrated rocks manufactures Coarse Aggregates. 2 The particle size is less than 4.75mm. The particle size is greater than 4.75mm. 3 Fine Aggregates are used in concrete as filler material to fill the voids that are formed between the coarse aggregate.
Table 4- Result of Aggregate Impact Value Test on Coarse Aggregate 20mm and RAP Table 5- Result of Aggregate Crushing Value Test on Coarse Aggregate 20mm and RAP Weight of sand 0.5 kg Weight of pycnometer or gas jar containing sand and filled with water 1.932 kg Weigh of pycnometer or gas jar filled with water only 1.613 kg
crushing value is defined by the percentage loss in mass on 2.36 mm size of test. Bigger percentage of aggregate crushing value means the aggregate is inferior in quality. According to BS 8821992, aggregate with crushing value less than 25 can be used in heavy duty floor, crushing value for more than 30, aggregate to be used in concrete for ...
The crushing value of recycled CDW coarse aggregate was higher than the dolomitic aggregate by 1.09 to 1.92. The angularity index of recycled CDW coarse aggregate was higher than the dolomitic aggregate by 10 to 16. The elongation index of recycled CDW coarse aggregate was higher than the dolomitic aggregate by 10 to 15.
Apr 13, 2020 Strength Of Coarse Aggregates By crushing strength of rocks, aggregate crushing value, aggregate impact value and abrasion value the material strength of these aggregate is indicated. Aggregates Absorption For applying a correction factor for aggregates in dry condition and determining water demand for concrete in saturated surface dry ...
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.
The average crushing value in the different tests is the actual crushing value of aggregate. Important points to remember. It is recommended that the crushing value of aggregate should be less than 30. If it is more than 30 then 10 finer aggregate is suggested to use. The aggregate whose crushing value is less than 30 can be used for ...
AGGREGATE IMPACT VALUE TEST-10 IMPORTANT , It has been found that for majority of aggregates, the aggregate crushing value and aggregate impact values are numerically similar within close limits For deciding the suitability of soft aggregates in base course construction, aggregate impact test is commonly used A modified impact test is also often carried out in the case of soft aggregates to ...
aggregate crushing value of coarse aggregate. NOTE 1 -The aggregate crushing value gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. With aggre- gate of aggregate crushing value 30 or higher, the result may be anomalous, and in
Apr 22, 2021 The aggregate crushing strength value is a useful factor to know the behavior of aggregates when subjected to compressive loads. Impact Value. The aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact. The impact value of an aggregate is sometime used as an alternative to its crushing value.
Sep 30, 2019 Additionally, the crushing values Q a indicate that N and R meet the Class I requirement Q a 12 and that S meets the Class III requirement Q a 30. As dispersed particles in concrete, coarse aggregate has a large influence on the apparent density, elastic modulus and volume deformation of concrete.
Name of the experiment Aggregate Crushing value test. Objective 1. Determine the aggregate crushing value of coarse aggregate. 2. Assess suitability of coarse aggregates for use in different types of road. Theory The aggregate crushing value give a relative measure of the resistance of an aggregate to crushing under gradually applied ...
Aggregate Abrasion Value Test is to find the percentage wear due to the relative rubbing action between the aggregate and steel balls used as abrasive charge. Home ... if any, which exists between results for these coarse gradings using the 10000 gm samples and the finer ones using the 5000 gm samples. ... Aggregate Crushing Value
Jun 30, 2018 The results showed that the aggregate crushing values for specimens from Palodheri and Jamal Garhi are above 30 and hence it is not advisable to use it on wearing surfaces but can be used in other concrete works while the samples from other localities can be safely used for both concrete and pavement. Table-2 3.6. Aggregate Impact Value
crushing value of coarse aggregate practile volues ... crushing value of coarse aggregate practile volues. Normal Aggregate . ... 75 of the concrete volume is ... sand and coarse aggregate is sieve No. .... Read more. aggregate crushing value and suppliers Aggregate and ...
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 ...
The aggregates crushing value test should be performed as per IS code 2386 Part IV. First, fill the sample aggregate with one-third of the cylindrical measure in three layers. Each layer should be tamped 25times freely. After filling the sample aggregate, weigh and record it as W1. Now fill the aggregate in the mould along with the plunger on top.
Therefore, an L.A. abrasion loss value of 40 indicates that 40 of the original sample passed through the No. 12 1.70 mm sieve. The standard Los Angeles abrasion test is AASHTO T 96 or ASTM C 131 Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine Background
The Procedure of Aggregate Crushing Value Test Aggregate Crushing Value Mould. Take the Empty weight of cylindrical measure as W1. Fill aggregate sample passing through 12.5 mm and retained on 10 mm IS sieve in measuring cylinder in 3 equal layers such that
Aggregate Crushing Value. This test helps to determine the aggregate crushing value of coarse aggregates as per IS 2386 Part IV 1963. The apparatus used is Cylindrical measure and plunger, Compression testing machine, IS Sieves of sizes 12.5mm, 10mm and 2.36mm. i The aggregates passing through 12.5mm and retained on 10mm IS Sieve ...