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Aug 28 2020 the first type of fine aggregates generally consists of natural sand fig 51 or crushed stone in little pieces up to a size of 5 mm 02 in requirements of as well as water and cement most probably an aggregate proportions shrinkage pump ability durability porosity and workability of concreteconcrete from variations in grading.Inquiry Online
a clay fine silt and fine dust when in is 2386 partii natural sand or crushed gravel sand and crushed stone sand does not exceed 5 by mass.
Aggregate can be defined as the crushed stone which used in concreteAggregate in concrete occupied about 70 – 80 of the total volume which provides the main body to concrete.
Aggregates are the most mined material in the worldConstruction aggregate is a broad category of granular raw material of different sizes sand gravel crushed stone slag recycled concrete etc used in constructionAggregate can be used in a number of ways in construction.
Any construction site can use demolition wasteConstruction demolition wastes crushed and sieved are basically dead mortar and concrete separated from steel which when crushed and sieved can replace sand to the amount of 25 in concrete mixes.
Aug 28 2020 the first type of fine aggregates generally consists of natural sand fig51 or crushed stone in little pieces up to a size of 5 mm 0Requirements of as well as water and cement most probably an aggregate proportions shrinkage pump ability durability porosity and workability of concrete.
Crushed stone dust waste can be used effectively to replace natural sand in concrete.
Dec 01 2016 it is recommended to use crushed sandIt is an economic and ecological alternative to natural sandCrushed sand possesses properties similar to that of river and is a more sustainable construction material.
It is my first answer on quoraGenerally the sand use in construction for making of concrete and mortarSo i try to understand you why do we use the sand in making of concrete.
Introduction to fine aggregates the maximum size used is 80 mm and the range of 80 mm to 475 mn is known as coarse aggregate and 475 to 150 µm is called fine aggregate75 mm is common for both fine and coarse fractionsQualities of fine aggregates fine aggregate should be clean i.
Jan 12 2020 use of crushed stone sand its impact on concrete performanceThe concrete has been traditionally made with use of natural river sand as fine aggregate.
Lets look at a few types of sand used in construction 1Concrete sand is one of the types of sands in india that is made from crushed concreteIt is a common component in cement and asphalt mixtures.
Many nj homeowners have found it desirable to complete the crushed gravel pathway with an edging materialWhether it’s larger crushed stone bricks concrete pavers or some other material you’ll find that the border serves two purposes.
Natural sand and gravel are generally dug or dredged from a pit river lake or seabed 2Crushed rock aggregates crushed rock aggregate generally excavated or quarried stone that has been crushed and screened to the desired standard particle size and distribution.
Nov 21 2017 a good sand which is used in construction should have less than 3 of silica and no organic impuritiesDifferent construction activities requires different fineness modulus of sandSand used in brick work the sand used for brickwork should have a fineness modulus of 1.
Nov 21 2017 sand passing through the 15875 mm sieve is called fine sandFine sand is mostly used in plastering works for better finish.
Oct 11 2018 we do not use use sea sand in construction due to following reasonsSea sand tends to very fine and rounded smooth rounded particles would offer less resistance to rearrangement than angular or elongated particles with rough surfaces.
Oct 15 2019 crushed stone sand it looks like gravel and feels like gravelBut unlike gravel crushed stone sand is a natural but commercially created resource that is made from crushed minerals such as granite or limestoneCrushed stone sand is commonly used for road construction and is widely known as a lowcost highvalue commodity.
River sand is good for all construction activities like concrete production and plastering as it is well gradedAs per the indian standard codes sand used in preparation of concrete and in plastering should ideally confirm to is383 zoneii.
Sep 01 2016 the study investigates the use of crushed rock sand as viable alternative to natural river sand that is being conventionally used as fine aggregate in cement concrete.
Silt in sand should not be more than 2 for crushed sandScreening is done to eliminate dust particles and washing of sand eliminates very fine particles present withinThe end product will satisfy all the requirements of is383 and can be used in concrete construction.
Test results indicate that crushed stone dust waste can be used effectively to replace natural sand in concreteConcrete made this replacement attain the same compressive strength comparable tensile strength.
The edges of the particles should be groundedThe ratio of fines below 600 microns in sand should not be less than 30There should not be any organic impuritiesSilt in sand should not be more than 2 for crushed sand.
The percentage passing 150 microns of manufactured sand is relaxed to 20 while that of natural sand is limited to 10As per design and economics crushed sand can be used to partially or fully replace river sand from a concrete mixThe availability of crushed sand is not a concern as it can be manufactured from rocks in any season.
The results of mix design indicate that crushed sand can also make as good a concrete as that made of natural sandThe compressive strength obtained is same as of normal mixesIn fact use of crushed sand will become inevitable in near future because of dwindling sources of natural sand.
Types of aggregate used in building construction types of aggregate based on sizeThere are two types of aggregate used in constructionA fine aggregate b coarse aggregateA fine aggregate– the aggregate which are usually passes or sieve through sieve of 4That is known as fine aggregate and it is normally is sand or crushed stone having size less than 9.
Types of gravel used in constructionConstruction gravel which comes from crushed limestone is utilized to make a solid foundationWhether you are making a driveway patio or walkway in your own backyard a gravel is a perfect choiceBigger rocks are dug in a quarry and crushed into smaller pieces.
Washed sand should be used at site for getting more strength in construction workBulking of sand due to moisture in each particle of sand sand gets a coating of water due to surface tension which keeps the particles apart.
White sand is the type of sand most often used in application where it is likely to be seenIt is made of crushed limestone which gives it is distinctive white color and softer finer texture.
Zone i–sand being very coarse and zone 4 sand is very fineIt is generally recommended by code to use sands of zones i to zone iii for structural concrete worksAastho designation m693 standard specification for fine aggregate for portland cement concrete it indicates that the fineness modulus of sand will not be less than 2.
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