Tests on Aggregates 2.1 Sieve analysis 9 2.2 Water absorption 13 2.3 Aggregate abrasion value 15 2.4 Aggregate impact value 18 2.5 Aggregate crushing value 21 3. Tests on Fresh Concrete 3.1 Workability 23 3.1.1 Slump 23 …
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The aggregate crushing value test (ACV, BS 812-Part-110) is one of the test methods for determining the crushing resistance of the aggregates. Alvarado et al. and Reyes et al. concluded that the ACV test was practical, reproducible, and stable and is a pivotal method in the evaluation of aggregate crushing resistance.
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Aggregate Crushing Value Test - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Aggregate Crushing Value Test Documents
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To achieve a high quality of pavement, aggregate possessing low aggregate crushing value should be preferred. Object: To determine the aggregate crushing value by compressive testing machine. Apparatus:
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Result: Aggregate crushing value = 20.4%. Result Analysis: 1. The value is higher when more percentage of aggregates crush and break into smaller. pieces which indicates the aggregates are of a lower quality. 2. Aggregate crushing value < 45% for aggregates used for concrete for non-wearing.
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Final Verdict. The aggregate crushing value for good quality aggregate used in base course shall not exceed 45 percent, and the value for surface course shall be less than 30 percent. The aggregate crushing value of coarse aggregates to be utilized for cement concrete pavement surface should not exceed 30%, according to the IRC and BIS.
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the aggregate crushing value (ACV) which gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. The method is …
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Aggregate crushing value Test Lab Report. 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 compressive load.
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8/16/2019 Aggregate Testing 7 Significance of Test Each type of aggregate test requires a specified aggregate size (E.g. 10-12.5 mm for crushing test) Each bituminous mix type has a recommended aggregate gradation(% passing 26.5 mm in 55-90 for GSB1) So aggregate is passed through a set of sieves to get material of various sizes
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AggregatesAggregates && Water for ConcreteWater for Concrete. AggregatesAggregates • Aggregates generally occupy 65- 80% of a concrete'sAggregates generally occupy 65- 80% of a concrete's volume.volume. Aggregates are inert fillers floating in theAggregates are inert fillers floating in the cement paste matrix for concretes of low …
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Test on Aggregates.ppt. ... Aggregate crushing value test: The 'aggregate crushing value' gives a relative measure of the resistance of an aggregate to crushing under a gradually applied compressive load. The aggregate crushing value should not be more than 45% for aggregates used for concrete other than for wearing surfaces. The ...
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crushing value. The relationship between the aggregate sizes and the crushing values will however vary with the type of specimens tested. When non-standard sizes of aggregates are used for the crushing test, (i.e. aggregate larger than 12.5 mm or …
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Aggregate crushing value is a numerical index of the strength of the aggregate and it is used in construction of roads and pavements. …
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2.3 Aggregate abrasion value 15 2.4 Aggregate impact value 18 2.5 Aggregate crushing value 21 3. Tests on Fresh Concrete 3.1 Workability 23 3.1.1 Slump 23 3.1.2 Compacting factor 25 3.1.3 Vee-Bee 27 4. Tests on Hardened Concrete 4.1 Non-destructive tests 29 4.1.1 Rebound hammer 29 4.1.2 Ultrasonic pulse velocity 31 4.2 Compression test 34
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The aggregate crushing value is a relative measure of crushing resistance under a continuously applied compressive stress. Aggregates with strong crushing resistance or a low aggregate …
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Aggregate Impact Value = 172.4 / (414.4)* = 41.60% Sample 03. Aggregate Impact Value = 184.4 / (428.5)* = 43.04% Weight of the retained aggregate sample = W5-W4 g Weight of the …
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Calculation of Aggregate Crushing Value. The crushing value of aggregates is measured in the ratio between the crushed aggregates, obtained from the IS sieve 2.36mm and the …
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AGGREGATE CRUSHING VALUE TEST. ( IS : 2386 PART 4 ) INTRODUCTION: The principal mechanical properties required in stones are (i) satisfactory resistance to crushing under the roller during construction and (ii) adequate resistance to surface abrasion under traffic. Aggregates used in road construction, should be strong enough to resist crushing …
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1. Determine the aggregate crushing value of coarse aggregate 2. Check the suitability of coarse aggregates to use in different types of road Apparatus Required for Crushing value test 1. A balance should be accurate up to 1 gm 2. IS sieves of size 12.5 mm, 10 mm, and 2.36 mm 3. Mould, measuring cylinder with plunger and base plate 4.
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The aggregate Crushing Value Test is an important test to be performed on aggregate. The strength of aggregate parent rock is determined by preparing cylindrical shape specimens of size 25 mm in diameter and 25 …
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To calculate aggregate Crushing value by testing aggregate passing 12.5 mm sieve and retained on a 10 mm sieve. Scope of Aggregate Crushing Value This procedure covers all relative activity for the project site. Apparatus of Aggregate Crushing Value: 15cm dia. steel cylinder with plunger and base plate
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Figure 1: Aggregate crushing value test apparatus Procedure: Reduce the laboratory sample to produce a test portion of sufficient mass to produce three test specimen of 14 mm to 10 mm size fraction. Thoroughly sieve the entire surface dry test portion on the 14 mm and 10 mm test sieves to remove the oversize and undersize fractions.
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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 of 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.
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The testing procedure to determine the aggregate crushing value typically follows the testing standard BS 812- 110: 1990. ... ... Aggregates used for the construction of road bases should be...
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