The document discusses the materials used in GPC including fly ash, aggregates, and alkaline activators. It presents the mix design for M20 grade GPC using different molarity alkaline activator solutions. ... "Performance studies on standard and high strength self compacting concretes", Indian concrete journal vol 13,issue no 2,pp7 …
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 …
AGGREGATES There are two types of aggregates Coarse Aggregates Fine Aggregates. AGGREGATES There are two types of aggregates Coarse Aggregates Fine Aggregates Fine and coarse aggregates make up the bulk of a concrete mixture. Sand, natural gravel and crushed stone are mainly used for this purpose. COURSE …
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 …
Download ppt "AGGREGATES." Role of Aggregates in Concrete: Concrete is basically a mixture of two components Paste (Portland cement, water, and air) Aggregate (sand, …
26. Polymer impregnated concrete with polymer loading of 5.6% MMA and polymerized by radiation have shown flexural strength 3.6 times more than that of the control specimen, i.e. the flexural strength was increased to 18.8 MPa from 5.2 MPa. Compressive Creep deformation of MMA impregnated concrete and styrene— …
13. Size classification Concrete is made with aggregate particles covering a range of size up to a maximum which usually lies between 10 mm and 50 mm (20 mm as typical). The particle size distribution is called grading Low grade concrete may be made with aggregates from deposits containing a whole range of sizes, ranging from the …
7. b) Manufactured aggregates - expanded clay, shale & slate are produced from natural materials - fly ash & slag are the main industrial waste used to produce lightweight aggregate - vermiculite and perlite manufactured from natural materials can be used to produce low – density concrete - Only aggregates produced by expansion of …
• Download as PPT, PDF • 11 likes • 3,425 views. AI-enhanced description. Self-employed Follow. Concrete aggregates make up 70-75% of concrete by volume and influence its properties like strength, durability, and economy. Aggregates are classified based on source, petrological characteristics, unit weight, and size. Their shape, surface ...
3. The aggregate occupies The aggregate occupies ~ ~70-75% of the 70-75% of the volume of concrete, so its quality is of volume of concrete, so its quality is of great importance. great importance. Aggregates may affect the following Aggregates may affect the following properties of concrete: properties of concrete: – Strength Strength – …
• Special care is necessary when using recycled fine aggregate. Only up to 10% to 20% recycled fine aggregate is beneficial. • Higher porosity of recycled aggregate compared to natural aggregate leads to a higher absorption. • It is recommended that recycled aggregates be batched in a prewetted and close to a saturated surface dry …
AGGREGATES There are two types of aggregates Coarse Aggregates Fine Aggregates. AGGREGATES There are two types of aggregates Coarse Aggregates Fine Aggregates Fine and coarse …
1) Dmax < 1/5 min (20,40)=4cm 2) Dmax < 1/3 (9)=3cm 3) Dmax < 3/4 (4)=3cm 4) Dmax < 4cm Dmax < 3cm. Download ppt "CONCRETE AGGREGATES." binding medium …
Sintered FA, ed slag. Normal-weight ( 2100 kg/m3) Natural ... Sintered Fly Ash. Mix fly ash with coal slurry, pelletise and sinter at 14000C. Properties ... – A free PowerPoint PPT presentation (displayed as an HTML5 slide show) on PowerShow - id: 11e4d1-NjYzZ
3. AGGREGATE ABRASION VALUE AIM :- To determine the abrasion value and hardness property of aggregates as per IS: 2386 (Part IV) - 1963. APPARATUS :- 1) Los Angles abrasion testing machine 2) IS Sieve of size - 1.7mm 3) Abrasive charge - 12 nos. cast iron or steel spheres approximately 48mm dia. and each weighing between …
Theresults obtained with the replacement of natural coarse and fine aggregates in 25%, 50%, and , and the advance in the political-administrative guidelines of thecity in the last eleven years, allow deducing the possibility of preparing structural and non-structural concretes for massive use in the construction area.
The document discusses the potential for geopolymer concrete to reduce CO2 emissions from the concrete industry. Geopolymer concrete is made from industrial byproducts like fly ash rather than …
6. A.K. Padmini, Influence of parent concrete on the properties of recycled aggregate concrete, Construction and Building Materials 23 (2009) 829–836. 7. Valeria Corinaldesi, Mechanical and elastic behaviour of concretes made of recycled-concrete coarse aggregates, Construction and Building Materials 24 (2010) 1616–1620. 27
3. INTRODUCTION: The high demand for concrete in the construction using normal weight aggregates such as gravel and granite drastically reduces the natural stone deposits and this has damaged the environment thereby causing ecological imbalance (Short and Kinniburgh, 1978). In developed countries, the construction industries have …
Recycled-Concrete-Aggregate.pptx - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. The document discusses recycled concrete …
Aggregate • 60-75% of the solid volume of most concretes The aggregate is principally responsible for the unit weight, elastic modulus, and dimensional stability of the concrete because these properties depend on the physical characteristics (strength, and bulk density) of the aggregate. • In addition, porosity, shape and texture of the ...
aggregates.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. This …
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 …
18 Aggregate Characteristics and Tests Abrasion resistance ASTM C 131 (AASHTO T 96), ASTM C 535, ASTM C 779 Freeze-thaw resistance ASTM C 666 (AASHTO T 161), ASTM C 682, AASHTO T 103 Sulfate resistance ASTM C 88 (AASHTO T 104) Particle shape and surface texture ASTM C 295, ASTM D 3398 Grading ASTM C 117 (AASHTO T 11), …
1 Aggregates for Use In Concrete. 2 Learning Objective Develop a basic understanding of aggregates and aggregate properties. Most concrete problems are a result of lack of …
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 …
8. By Weight • Normal weight aggregates • Natural – sand, gravel, crushed rock as granite etc., • Artificial – broken brick, air-cooled slag, etc., Produce normal-weight concrete 2200 to 2400 kg/m3 • Light weight aggregates – Shale, Clay, Slate, Slag Produce structural lightweight concrete 1350 to 1850 kg/m3 Produce lightweight insulating …
5. B.) Sedimentary Rock Types of Aggregate • Such rocks are formed by the deposition and subsequent cementation of these materials at the Earth's surface and within water. • Lime stone and sand …
• Download as PPT, PDF ... Water Content 2.Size of Aggregates 3.Shape of Aggregates 4.Mix proportions 5.Grading of Aggregates 6.Surface Texture of Aggregates 17. Strength of Concrete: …
Aggregates have 3 main functions in concrete. To provide a mass of particles which are suitable. to resist the action of applied loads show. better durability then cement paste …
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