Aggregates In Concrete Ppt
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- Aggregates In Concrete Ppt
This document discusses different types of aggregates used in concrete. There are four main types of aggregates: natural aggregates like granite, limestone, and …
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CONCRETE AGGREGATES binding medium (mortar) Portland Cement Concrete relatively inert filler ... – A free PowerPoint PPT presentation (displayed as an HTML5 slide show) on PowerShow - id: 40f4d3-NjJlM
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15 Deleterious Substances Item Mass % of Total Sample Clay lumps and friable particles 3.0 Material finer than 75 micron (No. 200) sieve: Concrete subject to abrasion 3.0* All other concrete 5.0* Coal and lignite: Where surface appearance of concrete is of importance 0.5 1.0 Source: Table 1 Limits for Deleterious Substances in Fine Aggregate for Concrete, ASTM C 33.
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Functions Of Coarse Aggregate in Concrete. Coarse aggregate is used in concrete to achieve the following functions: 1. It makes a solid & hard mass of concrete with cement and sand. 2. It provides bulk to the concrete. 3. …
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Learning Objective Develop a basic understanding of aggregates and aggregate properties. Most concrete problems are a result of lack of control of the variables in the materials and …
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The document presents the results of a study on using copper slag as a replacement for fine aggregates in concrete. Various concrete mixes were prepared with 0- …
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3. Introduction Recycled aggregate are comprised of crushed, graded inorganic particles processed from the materials that have been used in the construction and demolition debris. These materials are generally from buildings, roads, bridges, and sometimes even from catastrophes, such as wars and earthquakes. Recycled aggregate is generally produced by …
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Therefore, it is necessary to strengthen and control the construction of mass concrete for construction projects. This paper introduces crack prevention technology of mass …
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7. Classification & properties of recycle aggregate concrete Material composition is the basis for classification of recycled concrete aggregate in two main types- 1) Crushed concrete 2) Mixed material Each of these types …
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AGGREGATES By Farhan Sadiq 2k9-SCET-43/civil Muhammad Haroon 2k9-SCET-40/civil Numan Yousaf 2k9-SCET-41/civil Saqib Munir 2k9-SCET-09/civil Rashid Mehmood 2k9-SCET-06/civil. Concrete • Concrete is basically a mixture of two components • Paste (Portland cement, water, and air) • Aggregate (sand, gravel, crushed stone) • Aggregates …
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3. INTRODUCTION: The high demand for concrete in the construction using normal weight aggregates such as gravel and granite drastically reduces the natural stone …
WhatsApp: +86 18221755073binding medium (mortar) Portland Cement Concrete relatively inert filler materials (aggregates) In concrete mixtures the proportions of cement paste & aggregates is controlled by the following factors: Suitable workability & placeability of fresh mass. Adequate strength & durability of hardened product. Minimum cost of the final product
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The document discusses different types of aggregates used in construction. It defines aggregates as materials like sand, gravel, and crushed stone. It then discusses the purposes of aggregates, which include providing strength, weight, and being economically viable. It also discusses how aggregates are used in concrete, roads, and railways.
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Alkali-Aggregate Reactivity. Chapter 5 Alkali-Aggregate Reaction 5.1 Introduction 5.2 Types of Reactions 5.3 Evaluating Aggregates 5.4 Preventive Measures ... 5.3.3.5 Accelerated Concrete Prism Test (RILEM AAR-4) 5.3.3.6 Chinese Accelerated Concrete Microbar Test
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35. CONCLUSIONS (contd.) For HSC 30%-40% recycled coarse aggregates with reduced wc ratio may give same output as normal concrete gives. For low grade concrete 50% RCA replacement will give almost equal …
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If 65% of recycled aggregate or above is used, each physical properties will drop greatly. • However, if the portion of recycled aggregate adds to concrete is limited, it won't affect each property much. Based on the …
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Title: Aggregates in Civil Engineering 1 Aggregates in Civil Engineering. Base and Subbase ; Environmental Filters ; Fillers ; Dams Cores; 2 Aggregates in Composites. 60-70 of Concrete Volume ; 80-90 of Asphalt Volume ; Control Low-Strength Fill Material ; 95 of Polymer Concrete; 3 Uses of Aggregates. Filler material ; Dimensional Stability ...
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The present experimental study has the aim of arriving at the optimum quantity of the replacement material for the aggregates in concrete mixtures, for various engineering applications. For achieving a proper bond with the surrounding concrete paste, the recycled aggregates have been designed with respect to their size, shape and gradation.
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14. Experimental Study of Light Weight Concrete by Partial Replacement of Coarse Aggregate Using Pumice Aggregate CASE STUDY14 Coarse Aggregate Crushed stone …
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Materials for Civil and Construction Engineers CHAPTER 5 Aggregates. 5.1 Aggregate Sources • Natural: • natural sand & gravel pits, river rock • quarries (crushed) • Manufactured & recycled materials: • pulverized concrete & asphalt • steel mill slag • steel slugs • expanded shale • styro. 5.2 Geological Classifications • Igneous • Sedimentary • …
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8. METHODOLOGY In this study for different types of mixes or combination is being considered and designed as per Indian Standard Specification IS: 10262(2009) Water cement ratio- The water cement ratio we have selected according to the grade of concrete chosen and mix design to be done. The 20mm and down size rubber aggregate are used in concrete. …
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Aggregates for Use In Concrete * Cook out method – ASTM C566 is the most accurate * Always make sure you adjust your mix for moisture. * * * When you dealing with specific gravity you are using it to calculate absolute volumes …..Do not confuse with Bulk Volumes (An Example (1) Cement bulk volume 94 lbs / cubic foot (2) Cement absolute volume 196.56 lbs / cubic foot …
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filler materials (aggregates) In concrete mixtures the proportions of cement paste & aggregates is controlled by the following factors: Suitable workability & placeability of fresh mass. Adequate …
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8 Manufactured Aggregate Crushed rock or air-cooled slag Fine and coarse aggregate Rough, angular texture Cubical or elongated shape More uniform in size Less likely to be contaminated Manufactured aggregate is produced by crushing sound parent rock at stone crushing plants. As a result of the crushing operation, manufactured aggregates often have a rough surface texture, …
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9. How toproduce recycle aggregate concrete Crushing and screening systems start with primaryjaws, conesand/or largeimpactor takingrubblefrom 30inches to 4 feet. Asecondary cone or impactor may or may not need to be run, and then primary and secondary screensmayor maynot beused, depending upon the project, the equipment usedand the final …
WhatsApp: +86 18221755073The high cost of conventional building materials is a major factor affecting housing delivery in world. This has necessitated research into alternative materials of construction and analyzing flexural and compressive strength …
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• The normal specifications with respect to cement, aggregate and water also apply to shotcrete but the coarse aggregate used should be harder to account for attrition and of small size. The w/c ratio is kept quite low. The admixtures such as accelerators are used to permit quick setting of shotcrete. • The high cost of shotcrete and the ...
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Important Characteristics of Aggregate in Concrete . A well-graded aggregate should typically be within the size range of 1/8 to 2 inches; however, most guidelines suggest sizing coarse aggregates between 3/8 inch and 1.5 inches (9.5 mm to 37.5 mm) based on project requirements. Aggregates larger than 3 inches are not suitable for most concrete ...
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Geopolymer concrete ppt - Download as a PDF or view online for free ... no further strength loss -no visible cracks up to 600 οC -minor cracks at 800 οC -GPC with more …
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Aggregates Ppt - Aa - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. This document summarizes key information about aggregates used in concrete, including: the importance and benefits of aggregates; factors affecting concrete strength; classification of aggregates by size, source, and density; how …
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aggregates.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. This document discusses different types of aggregates used in concrete, including their classification, properties, and common tests. It defines aggregates as inert materials mixed with cement or lime to make concrete or mortar.
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Aggregates, Concrete & Cement Mailing Leads. The Aggregates, Concrete & Cement Mailing List includes companies that manufacture and/or distribute ready-mix cement, concrete, bricks, floor tiles, flue lining, mortars, paving brick, sewer pipes/fittings, roofing tiles as well as sand, gravel, shale, clay mining and quarrying.
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The function of the coarse aggregate is to act as the main load- bearing component of the concrete. >Fine aggregate: Aggregate passing No.4(4.75mm) sieve and …
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9. Classification of Aggregate III. Classification based on unit weight a. Normal weight aggregates: The commonly used aggregates i.e. sand, gravel, crushed rocks such as granite, basalt, sandstone (sedimentary) and limestone. It has specific gravities between 2.5 and 2.7 produce concrete with unit weight ranging from 23 to 26 kN/m3 The compressive strength …
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