(PPT) AGGREGATES AND OTHERS | Aniket Patel - Academia.edu

2. Dimensional Stability. 3. Shrinkage. 4. thermal changes. 5. Strength and Stiffness. 6. Economy. 7. To make the concrete denser. SPECIFICATION The Specifications for aggregates are detailed These specifications are to be followed when inspecting aggregates. There are two general types of requirements for aggregate: quality and gradation.

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The aggregate impact value provides a relative measure of resistance to crushing under a gradually applied compressive load. To achieve a high quality of pavement, lower aggregate impact value should be preferred. Toughness is the property of a material to resist impact. Due to traffic loads, the aggregate are subjected to the pounding action ...

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Aggregates. Aggregates are inert granular materials such as sand, gravel, or crushed stone that, along with water and portland cement, are an essential ingredient in concrete. For a good concrete mix, aggregates need to be clean, hard, strong particles free of absorbed chemicals or coatings of clay and other fine materials that could cause the ...

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Impact crushers are traditionally classified to two main types: horizontal shaft impact (HSI) crushers and vertical shaft impact (VSI) crushers. These different types of impact crushers share the crushing principle, impact, to reduce the material to smaller sizes, but features, capacities and optimal applications are far from each other.

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Flakey is the term applied to aggregate or chippings that are flat and thin with respect to their length or width, Aggregate particles are said to be flakey when their thickness is less than 0.6 of their mean size. – PowerPoint PPT presentation. strength valve, as defined by the 10 value test. construction projects.

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Aggregate crushing value test on coarse aggregates gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load. 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.

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May 17, 2019· 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 …

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Apr 28, 2013· 24The aggregate crushing value givesa relative measure of resistance ofan aggregate to crushing under agradually applied compressive load.The aggregate crushing strengthvalue is useful factor to know thebehaviour of aggregates …

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The apparatus of the aggregate crushing value test as per IS: 2386 (Part IV) – 1963 consists of: 1) A 15cm diameter open ended steel cylinder with plunger and base plate, of the general form and dimensions as shown in Fig 1. 2) A straight metal tamping rod …

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Uniformly blend the aggregate during crushing operations or mix in a plant. The plant shall blend and mix the materials to meet the specifications and to secure the proper moisture content for compaction. 208–3.4 PLACING. Place aggregate base material on the prepared underlying course and compact in layers of the thickness shown on the Plans.

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AN INTRODUCTION TO RECYCLED AGGREGATE CONCRETE: PRODUCTION AND APPLICATIONS Piyush Sharma Department of Civil Engineering, Amity School of Engineering & Technology Amity University, Haryana, India Email: [email protected] ABSTRACT To obtain good quality concrete using recycled aggregate it is necessary to follow the minimum …

Road Aggregate 101: Important Stuff

Road Aggregate 101: Nominal maximum and/or minimum sized stone in mix The nominal size distribution of an aggregate specification is defined as the range of sieve openings through which of the aggregate can pass. Road Aggregate 101: Gradation or distribution of different sized stones Open graded aggregate vs. well graded aggregate.

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The aggregate crushing value should not exceed 45% for aggregate used for concrete other than for wearing surfaces, and 30 % for concrete for wearing surfaces, such as runways, roads for pavements. Aggregate impact value gives a relative measure of the resistance of an aggregate to sudden shock or impact, As an alternative to

ASPHALTIC CONCRETE Description

Specifications require the Contractor to be responsible for obtaining an acceptable material source and producing mineral aggregate that will meet all of the specifications. Utilizing mineral aggregate, crushed, processed, separated, and stockpiled, the Contractor shall formulate a mix design which meets all of the specified design criteria.

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2. If using aggregate produced from concrete pavement with only one type of aggregate but repaired with concrete patches with a different aggregate type. C. Aggregates for Optimized Gradation . 1. Coarse Aggregate Requirements . a. Coarse aggregate includes all aggregate particles greater than or retained on the . 3 / 4-inch sieve. b.

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Crushing also improves the size distribution and range. Crushed stone is also a processed aggregate. It is created when the fragments of bedrock and large stones are crushed so that all particle faces ar e fractur ed. Variation in size of particles is achieved by screening. Aggregates that have received little or no screening are known as ...

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Aggregate Application Rate Calc •Need -Ave least Dimension •Need -Specific Gravity of the Aggregate •Calculate the Voids in Loose Agg •V= (Loose unit weight (lbs/cubic ft)/(62.4*Spec Gravity) •Wastage factor Example 10% for high traffic, 5% for very low slow traffic 1+.10 = 1.10 high Traffic