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highway aggregate impact test objective
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Objective - LinkedIn SlideShare
Aggregates is then transfer into another steel mould . The empty steel mould is weighed first. After weighed, the steel mould is then filled with compacted aggregates. Both of the mass is recorded in the table. The sample test is subjected to 15 blows of the hammer dropping 381mm by using Aggregates Impact Tester. After 15 blows of the hammer, the sample is then weighed and the mass of the
7 Lab Tests on Aggregates to Make Better
Place the mould in the aggregate impact testing machine and administer 15 numbers of blows of a metal hammer. After that, remove the crushed aggregate and sieve it through a 2.36 mm sieve. The aggregate impact value is measured as % of aggregates passing through the 2.36mm sieve (W2) to the total weight of the sample (W1). To know more in detail read, Impact Test on Aggregates. 04.
Impact Value of Aggregate
1. objective. 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 compressive load. . apparatus required. Fig. 1: Balance. Balance should be accurate upto 1 g. Fig. 2: Sieves. Seives required are 12.5, 10.0 and 2.36 mm . Fig. 3: Impact Testing machine. Weight of hammer is
PROPERTIES AND TESTING OF AGGREGATES
Impact Test on Aggregates. Impact value of aggregate will give aggregate capability against sudden loads or forces. For this test also aggregate passing through 12.5mm and retained on 10mm sieve is taken and oven dried. Fill the cylinder with aggregate in 3 layers, 25 strokes of tamping for each layer. Weight w1 noted. The cylinder is placed in impact testing machine which consist a hammer
Aggregate Impact Value - Civil Engineering
AGGREGATE IMPACT VALUE This test is done to determine the aggregate impact value of coarse aggregates as per IS: 2386 (Part IV) – 1963. 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
Effects of Los Angeles Abrasion Test Values on the
and impact. The most common test used to measure this resis Mineral Aggregates, of the Highway Research Board, prepared and distributed a ques tionnaire on aggregate degradation (8) . The responses among agencies that were using solely an abrasion test (e.g., the LA abrasion test) indicated that only 36 percent felt protected against accepting problem aggregates. The level of
Los Angeles Abrasion Test Procedure, Apparatus
The Los Angeles test is a measure of degradation of mineral aggregates of standard gradings resulting from a combination of actions including abrasion or attrition, impact, and grinding in a rotating steel drum containing a specified number of steel spheres. The Los Angeles (L.A.) abrasion test is a common test method used to indicate aggregate toughness and abrasion
AGGREGATE IMPACT VALUE (IS:2386-Part IV
07.05.2013· Objective For determination of the aggregate impact value of coarse aggregate, which passes 12.5 mm. IS sieve and retained on 10 mm. IS sieve. Reference Standards IS: 2386(Part IV)-1963 Methods of test for aggregate for concrete Part IV Mechanical Properties. Equipment & Apparatus Aggregate Impact Test Machine Sieves (12.5mm,10mm) Cylindrical metal measure Tamping Rod
Aggregate Impact value Test Apparatus,
The apparatus of the aggregate impact value test consists of: A testing machine weighing 45 to 60 kg and having a metal base with a plane lower surface of not less than 30 cm in diameter. Level and plane concrete floor of minimum 45 cm thickness are used to support it. The base of the machine should also have provisions for fixing its base. A cylindrical steel cup of internal diameter 102 mm
AGGREGATE IMPACT TEST by Nurul Afiqah on
design by Dóri Sirály for Prezi AGGREGATE IMPACT TEST In conclusion,the percentage of aggregate's wear depends on the quality of aggregate. In this test, we can conclude that: The loss of aggregate = 1663 g The percentage of wear = 33.26% Lower abrasion loss values indicate the
7 Lab Tests on Aggregates to Make Better
Place the mould in the aggregate impact testing machine and administer 15 numbers of blows of a metal hammer. After that, remove the crushed aggregate and sieve it through a 2.36 mm sieve. The aggregate impact value is measured as % of aggregates passing through the 2.36mm sieve (W2) to the total weight of the sample (W1). To know more in detail read, Impact Test on Aggregates. 04.
INTRODUCTION AND CLASSIFICATION OF
13.12.2016· C) IMPACT TEST. Objective: To determine the impact value of road aggregates and to determine their suitability in road construction based on the impact value. Apparatus: i) A testing machine weighing 45 kg to 60 kg and having a metal cylinder base with 30 cm diameter supported on concrete floor of minimum 45 cm thickness.
100+ TOP Transportation Engineering LAB VIVA
How the flakiness index of the sample helps in deciding the design of a highway? How is aggregate Impact expressed? What do you understand by dry and wet Impact value? Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course? The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate
Technology's impact on highway construction •
Technology's impact on highway construction. 19th September 2016 . Infrastructure projects are complex and have a unique set of requirements. Contractors working on these types of projects need to be aware of regulations, safety mandates and so much more in order to succeed, reports ConExpo-ConAgg website. A new report on the future of road and highway construction in the United States
7 LAB TESTS ON AGGREGATE TO CHECK
12.09.2015· 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. The material is filled in 3 layers where each layer is tamped for 25 numbers of blows (see
Pavement materials: Aggregates - Civil Department
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. The material is filled in 3 layers where each layer is tamped for 25 number of blows. Metal hammer of
Aggregate Tests - Pavement Interactive
Free online knowledge for the paving industry. Pavement Interactive was developed by the Pavement Tools Consortium, a partnership between several state DOTs, the FHWA, and the University of Washington, as part of their effort to further develop and use computer-based pavement tools.
HIGHWAY CONSTRUCTION MATERIAL & PRACTICE
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. The material is filled in 3 layers where each layer is tamped for 25 numbers of blows. Metal
100+ TOP Transportation Engineering LAB VIVA
How the flakiness index of the sample helps in deciding the design of a highway? How is aggregate Impact expressed? What do you understand by dry and wet Impact value? Aggregate Impact value of material A is 15 and that of B is 35. Which one is better for surface course? The abrasion value found from Los Angeles test for two aggregates A and B are 50% and 38% respectively. Which aggregate
Laboratory Tests for Predicting Coarse Aggregate
1. Unconfined freeze-thaw test for coarse aggregate (MTO LS-614), 2. Micro-Deval abrasion test (BNQ 2560-070/82), 3. Aggregate impact vuluc test (BS 812), 4. Polished stone value test (BS 812), and 5. Aggregate abrasion value test (BS 812). The evaluation of the conventional and the alternative tests
Highway Engineering MCQ Questions & Answers
Learn Highway Engineering MCQ questions & answers are available for a Civil Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Highway Engineering MCQ question is the important chapter for a Civil Engineering and GATE students.
Pavement materials: Aggregates - Civil Department
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. The material is filled in 3 layers where each layer is tamped for 25 number of blows. Metal hammer of
Los Angeles Abrasion - Pavement Interactive
As the drum rotates the aggregate degrades by abrasion and impact with other aggregate particles and the steel spheres (called the "charge"). Once the test is complete, the calculated mass of aggregate that has broken apart to smaller sizes is expressed as a percentage of the total mass of aggregate. Therefore, lower L.A. abrasion loss values indicate aggregate that is tougher and more
objective of aggregate impact value - BINQ
28.01.2013· objective on experiment on aggregate crushing value. TEN PERCENT FINES VALUE (TFV) – Namicon Testing :: NDT a 258 aggregate impact value (aiv) apparatus bs 812-112 aggregate crushing value (acv) ten percent »More detailed
Concrete & Highway Materials Laboratory
• The objective of highway materials laboratory is to determine some of the properties of coarse aggregates and bitumen. Experiments include tests for impact, abrasion and crushing strength for coarse aggregates. For bitumen, tests include penetration, ductility, viscosity, softening point and flash and fire point. The students will be able