• GENERAL SPECIFICATIONS 11 CONCRETE New York City

    GENERAL SPECIFICATIONS 11 CONCRETE November 8, 1991 THE CITY OF NEW YORK 3.7 Maximum Size of Coarse Aggregate 33 3.8 Admixtures 33 1.1.1 This specifiion covers castinplace structural concrete for use in buildings and structures, paving concrete (except heavy duty paving concrete), precast, and miscellaneous castinplace concrete

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  • aggregate Topic concrete.org

    Nov 01, 2019 · Aggregates are the major constituent (ingredient) in concrete, making up 60% to 70% of the volume of concrete. Aggregates influence the workability of plastic concrete and also the durability, strength, thermal properties, and density of hardened concrete. Particle size divides aggregates into two egories: fine and coarse. Most fine aggregates are sand and contain particles smaller than 3/8

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  • Different Types & Sizes of Aggregate for Concrete

    Aug 11, 2018 · [2] COARSE AGGREGATE. Coarse aggregates are particulates that are greater than 9.5mm. The usual range employed is between 9.5mm and 37.5mm in diameter. Typically the most common size of aggregate used in construction is 20mm. A larger size, 40mm, is more common in mass concrete.

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  • Importance of Gravel and Sand for Concrete Hunker

    Apr 12, 2018 · Use the fine aggregate for concrete slabs or other smooth surfaces. A "coarse" aggregate means using larger pieces of gravel. Coarse concrete is helpful for sturdier projects. Concrete with a coarse aggregate doesn''t produce a smooth

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  • Recycled Aggregates

    Concrete is a relatively heavy construction material and is frequently recycled into aggregate for road bases or construction fill. Case Study: O''Hare Modernization Project. Recycled concrete aggregates are being considered for use in the O''Hare Modernization Project (OMP).

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  • How to Make Lightweight Concrete Hunker

    May 09, 2018 · Lightweight concrete may not be as structurally sound as traditional concrete, but it can be useful in some projects where weight is more important than strength. To make this concrete, combine 8 parts cement, sand and lightweight aggregate with 5 parts water.

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  • Aggregates for Concrete GreenSpec

    (read more about recycled aggregates) • Recycled Concrete. Recycled concrete is created by breaking, removing, and crushing existing concrete to a preferred size. It is commonly used as a base layer for other construction materials. Recycled concrete can be used as aggregate in new concrete, particularly the coarse portion.

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  • Substitution of Coarse Aggregates with MolluskShell Waste

    This research is focused on identifying the porosity in concrete manufactured with aircooled blast furnace slag as coarse aggregate and analyzing its potential use as sound absorption material.

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  • Making Heavy Concrete CR4 Discussion Thread

    Jun 13, 2010 · Use a Heavy (high density) coarse aggregate. Follow a mix design for the strength you want. Then substitute the coarse aggregate (rocks) for something heaver than rock. Hospitals use a very heavy (high density) mix around their x ray rooms, perhaps you can search around and find what that mix design is.

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  • Sizes and Grading of Aggregates for Road Maintenance and

    greater the tendency to segregate. It is necessary in use, where combina­ tions of coarse and fine aggregate are wanted in the finished work, to combine them separate^. For example, in portland cement concrete one or more sizes of coarse aggregate are separately batched with the

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  • Special Concrete Finishes QUIKRETE

    fresh concrete. Use a screed to evenly distribute the force of each blow. ExposedStone and CoarseAggregate Finishes Stones of various shapes and sizes can be individually handset or sown like seeds into a surface of slightly stiff concrete. Coarse aggregate, such as large gravel, may be applied in the same way. Be sure to use

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  • USE OF FERROCHROME SLAG AS AGGREGATE IN CONCRETE

    cooled slag is used as a partial substitution of coarse aggregate in concrete and water cooled granulated slag is used as a partial substitution for sand in concrete. Reports show that air cooled ferrochrome slag has gained popularity as a coarse aggregate in concrete. But the use of water cooled rochrome slag is lagging behind.

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  • Ready Mix Concrete Ordering Tips

    Jan 24, 2019 · The maximum coarse aggregate must also be specified when ordering readymix concrete. If you use larger coarse aggregate in a crosssection where the steel ratio is high, then you could be in for big problems due to honeycombing.

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  • What is the size of coarse aggregate used in concrete? Quora

    Mar 02, 2018 · When the size of aggregate is greater than 4.75 mm ( say 5 mm) it is called coarse aggregate. Graded aggregates are used for better particle packing. The larger the size of aggregate lesser the cement required for same strength up to certain grade

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  • Aggregate in Concrete The Concrete Network

    DO use aggregate that''s in compliance with ASTM C 33, "Standard Specifiions for Concrete Aggregates." Aggregates must be sound, clean, hard, durable, and free of excessive fines or contaminates that can affect cement hydration or disrupt the pasteaggregate bond. DON''T exceed limits for deleterious material content in fine and coarse

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  • The Suitability Of Limestone Aggregates For Use In

    The Suitability Of Limestone Aggregates For Use In Structural Concrete. The following is an excerpt of a presentation made by Mr. Gordon Hutchinson at a seminar hosted by John''s Hall Aggregates Limited entitled "The future of Construction Aggregates" held on June 13, 2012 at the Lecture Theatre, MontegoBay Community College.

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  • MATERIAL SPECIFICATION FOR AGGREGATES CONCRETE

    Coarse aggregate composed of 80% siliceous aggregates as determined by at least 609, shall be LS tested in a salt scaling test according to LS412 together with either the fine aggregate that the coarse aggregate is intended to be used with, or a fine aggregate from the same geographic area as the coarse aggregate.

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  • GENERAL SPECIFICATIONS 11 CONCRETE New York City

    GENERAL SPECIFICATIONS 11 CONCRETE November 8, 1991 THE CITY OF NEW YORK 3.7 Maximum Size of Coarse Aggregate 33 3.8 Admixtures 33 1.1.1 This specifiion covers castinplace structural concrete for use in buildings and structures, paving concrete (except heavy duty paving concrete), precast, and miscellaneous castinplace concrete

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  • Coarse Aggregate: Definition & Density Video & Lesson

    Coarse aggregate is also described by its bulk density, which is a property that can easily be tested in the laboratory. The standard testing procedure for this is the American Society of Testing

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  • High Density Concrete: Types and Properties Concrete

    Thus the use of concrete as shielding against radiation needs more space. 2. The weight of shielding concrete is very high in the range of 3360 to 3840 kg/m 3. Aggregates to be Used in Shielding High Density Concrete: For making shielding concrete heavy weight aggregate having a specific gravity between 3.5 to 4.0 is needed.

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  • Coarse Aggregate Use In Heavy Concrete

    coarse aggregate use in heavy concrete. coarse aggregate use in heavy concrete spirosurvey Coarse Aggregate, MagnaDense is a high grade natural aggregate, manufactured from the iron oxide Magnetite With its high density MagnaDense is used as loose ballast or as aggregate to produce high quality, high density concrete This heavy concrete.

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  • Construction aggregate Wikipedia

    Construction aggregate, or simply "aggregate" is a broad egory of coarse to medium grained particulate material used in construction, including sand, gravel, crushed stone, slag, recycled concrete and geosynthetic aggregates. Aggregates are the most mined materials in the world.

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  • Mechanical properties of heavy weight concrete

    The concrete mix as per IS10262(2009) is used for M25 and M35 grades of concrete and in this only coarse aggregate is replaced with heavy weight hematite coarse aggregate and natural sand is

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  • Use of AirCooled Blast Furnace Slag as Coarse Aggregate

    coarse aggregate in concrete pavements. The report discusses ACBFS aggregate production and properties, and the properties of concrete produced with ACBFS coarse aggregate. Both the physical and chemical properties of ACBFS are presented, as are the properties of the concrete produced with ACBFS coarse aggregate.

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  • MECHANICAL PROPERTIES OF HEAVY WEIGHT CONCRETE

    The concrete mix as per IS10262(2009) is used for M25 and M35 grades of concrete and in this only coarse aggregate is replaced with heavy weight hematite coarse aggregate and natural sand is used as fine aggregate and three levels of silica fume at 5%, 10% and 15% are used by weight of cement. All mixes are designed for 100mm slump.

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  • Heavy Duty Floors Concrete Construction Magazine

    The base of a heavy duty floor should be a impermeable membrane if it rests on the ground and be of noncompressible base material or have inadequate or widely varying bearing capacities. Until recently it was thought that the choice of coarse aggregate was the

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  • Development of highperformance heavy density concrete

    After extensive trials and errors, cement content (450 kg/m 3) and ototal aggregate ratio (40%) were adjusted for all concrete mixtures. Coarse aggregates were used in a saturated surface dry condition to avoid the effect of water absorption of coarse aggregate during mixing and consequently to assess the real effect of coarse aggregate

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  • Coarse Aggregate Use In Heavy Concrete

    coarse aggregate use in heavy concrete. coarse aggregate use in heavy concrete spirosurvey Coarse Aggregate, MagnaDense is a high grade natural aggregate, manufactured from the iron oxide Magnetite With its high density MagnaDense is used as loose ballast or as aggregate to produce high quality, high density concrete This heavy concrete.

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  • Aggregates for Concrete Portland Cement Association

    Aggregates for Concrete. The proper selection of aggregates for use in concrete mixtures is critical to long term concrete performance. Aggregates generally occupy 60% to 75% of the concrete volume and strongly influence the concrete''s fresh and hardened properties, mixture proportions, and economy.

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  • Recycled Aggregate Concrete: Appliions, Advantages

    Recycled concrete rubbles can be used as coarse aggregate in concrete. Production of RAC also results in generation of many byproducts having many uses such as a ground improvement material, a concrete addition, an asphalt filler etc. Recycled Aggregate Use in India. Currently India has a severe shortage of infrastructural facilities.

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  • What is a fine aggregate? Quora

    Fine aggregate: Rock particles with particle size less than 4.75mm, like river sand. Fine aggregates need to be processed by the perfect aggregate production line. Jaw crusher + Cone crusher + Sand making machine + auxiliary equipment (feeder, co

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  • High Density Concrete: Types and Properties Concrete

    Thus the use of concrete as shielding against radiation needs more space. 2. The weight of shielding concrete is very high in the range of 3360 to 3840 kg/m 3. Aggregates to be Used in Shielding High Density Concrete: For making shielding concrete heavy weight aggregate having a specific gravity between 3.5 to 4.0 is needed.

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  • Heavyweight Aggregates for Heavyweight Concrete Production

    Heavyweight aggregates as it can be seen from the name is an aggregate that posses relatively high density and it is fundamental in a situation that high density concrete is necessary. Generally, aggregates with specific gravity of 2400 Kg/m 3 and higher are considered to be heavyweight. The

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  • SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85

    1 SPECIFIC GRAVITY OF COARSE AGGREGATE AASHTO T 85 GLOSSARY Absorption: The increase in weight due to water contained in the pores of the material. Bulk Specific Gravity (also known as Bulk Dry Specific Gravity): The ratio of the weight in air of a unit volume of aggregate at a stated temperature to the weight in air of an equal volume

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  • DenseGraded Pavement Interactive

    A densegraded mix is a wellgraded HMA mixture intended for general use. When properly designed and constructed, a densegraded mix is relatively impermeable. Densegraded mixes are generally referred to by their nominal maximum aggregate size.They can further be classified as either finegraded or coarsegraded.

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  • Experimental Study on Heavy Weight Concrete Using

    is 7 N/mm2 for 25% replacement of coarse aggregate with hematite stone and that for laterite concrete is 6.16 N/mm2 for 25% replacement of coarse aggregate with laterite stone. V. CONCLUSIONS In this study, experimental studies on replacement of coarse aggregate with heavy weight aggregates on the properties of concrete was investigated.

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  • STONE AGGREGATE DESCRIPTIONS

    • Material has a 2 inch top size and is a mix of coarse stone and fine material • Fines in material will include dirt, silt, loam, or clay • Used as heavyduty subbase for roads and parking lots. coarse aggregate used in readymixed concrete & hot mix asphalt • Also used for driveways, walkways, drainage channels, and swails.

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  • Use of Recycled Aggregates in Construction

    byproducts, on the other hand, have greater potential for use in concrete and/or as road construction materials. A number of manufactured and recycled aggregates are readily available in certain localities. Aircooled blast furnace slag (BFS) and manufactured sand are two good examples of concrete coarse and fine aggregates.

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