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What kind of machine-made sand grading interval and fineness modulus are suitable for preparing concrete?

The bigger the fineness modulus is the more coarse the sand is The fineness modulus of the sand used in ordinary concrete is within 37 16And if M x is within 37 31 it is coarse sand if M x is within 30 23 it is medium sand if M x is within 22 16 it is fine sand and if M x is within 1507 it is superfine sand which should be considered specifically when concrete is

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Data Collection and Analyses Pertinent to EPAS

Since the flexural modulus is recommended for use in pavement design calculations and since this value is lower than the compressive modulus the modulus of eleasticity is based on the flexural modulus For LFA mixtures the modulus of elasticity is in the range of 15 x 106 Psi to 25 x 106 psi Reference 148 California Bearing Ratio

RIlangovana NMahendran and KNagameane made a study on concrete by 100 replacement of natural sand by quarry dust They concluded that the compressive strength flexural strength and durability properties of concrete made of artificial sand are nearly 10 more than the conventional concrete

Preparing the concrete cubes with coconut shells and gravel Testing those cubes in compression testing machine The technique adopted for this study was batching by volume using a standard mould of 150x150x150 mm for casting the cubes

Laboratory investigation on coconut shell in concrete

Laboratory investigation on coconut shell in concrete

To avoid this ambiguity fineness modulus could be used as a yard stick to indicate the fineness of sand The following limits may be taken as guidance Fine sand Fineness Modulus 22 26 Medium sand FM 26 29 Coarse sand FM 29 32 Sand having a fineness modulus more than 32 will be unsuitable for making satisfactory

Sand production with VSI crushing and air classification

In order to carry out research on the performance of machinemade sand concrete with stone powder content the PO 425 cement from Qijianshang Concrete Station in Gansu Province was used in the

11441 Strength properties Guney et al 2010 replaced fine aggregate with 0 5 10 and 15 WFS in concrete and observed a decrease in fluidity and the slump value of the fresh concrete This may be due to the presence of clayey type fine materials in the WFS which are effective in decreasing the fluidity of the fresh concrete

Compared with natural sand due to the different production processes of machinemade sand in different regions there are problems such as poor gradation of machinemade sand large fineness

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

Aggregates Portland Cement Association

Aggregates Portland Cement Association

A NEW MIX DESIGN METHOD FOR HIGH PERFORMANCE CONCRETE

Aug 24 2016 The locally available natural sand passing through 475mm IS sieve having fineness modulus of 320 specific gravity of 280 and conforming to grading Zone I of IS3831970 was used

Besides the local sand available in rivers is very fine in nature and it belongs to grading ZoneIV as per Indian Standard code IS 383 This type of sand does not give very good strength moreover there may be excessive shrinkage To overcome this problem upgradation of grain size of local sand with suitable replacement by relatively

Fineness modulus 250 to 335 Unit weight tested for but no specifications No crushed material Must be washed sharp feel desirable No sand used because of clogging of Inlets and drainage and motorist safety Must be free of too much clay loam etc particles must not degrade In service and must visually contrast with Icesnow

Jun 01 2018 The trend was that concrete made from Sand A absorbed water of about 77 of its dry weight within 24 h of immersion while concrete from Sand B had the least water absorption of 38 which is about 50 of that of concrete from Sand A Concrete samples from other sands C D and E had water absorption of 62 54 and 42 respectively

Aggregates for Concrete Memphis

aggregatessand gravel crushed stone and aircooled blastfurnace slagproduce freshly mixed normalweight concrete with a density unit weight of 2200 to 2400 kgm 3 140 to 150 lbft 3 Aggregates of expanded shale clay slate and slag Fig 53 are used to produce structural lightweight concrete with a freshly mixed density

Aggregates for Concrete Memphis

Aggregates for Concrete Memphis

The fineness modulus shall not be less than 226 or more than 314 If this value is exceeded the fine aggregate will be rejected unless suitable adjustments are made in proportions of coarse and fine aggregate The fineness modulus of fine aggregate shall be determined by adding the cumulative

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

Aug 24 2016 The locally available natural sand passing through 475mm IS sieve having fineness modulus of 320 specific gravity of 280 and conforming to grading Zone I of IS3831970 was used

Characterisation and mix specification of commonly used

Mar 02 2019 The maximum particle size of 236 mm was maintained for mortar preparation and the fineness modulus of the sand was determined as 23 It means the average size of river sand particle was in between 118 mm to 085 mm ASTM C 144 17 20 specified limits of fine aggregate gradation to be used in masonry mortar is presented as lower and

Fineness modulus of different type of sand is as per given below Type of Sand Fineness Modulus Range Fine Sand 22 26 Medium Sand 26 29 Coarse Sand 29 32 Generally sand having fineness modulus more than 32 is not used for making good concrete Fineness modulus can also be used to combine two aggregate to get the desirable

Lab Practicaldoc 10 Individual Background Information

Lab Practicaldoc 10 Individual Background Information

The fineness modulus must be not less than 23 nor more than 31 nor vary more than 02 from the typical value of the aggregate source If this value is exceeded the fine aggregate should be rejected unless suitable adjustments are made in the proportions of fine and coarse aggregate

Based on a series tests the properties of protomachinemade sand of gravel such as grain feature fineness modulus grading density void ratio and MB value as well as the fineness distribution

Aggregates for Concrete Memphis

concrete volume 70 to 85 by mass and strongly influence the concretes freshly mixed and hardened properties mixture proportions and economy Fine aggregates Fig 51 generally consist of natural sand or crushed stone with most particles smaller than 5 mm 02 in Coarse aggregates Fig 52 consist of one or a comCHAPTER 5

The bigger the fineness modulus is the more coarse the sand is The fineness modulus of the sand used in ordinary concrete is within 37 16And if M x is within 37 31 it is coarse sand if M x is within 30 23 it is medium sand if M x is within 22 16 it is fine sand and if M x is within 1507 it is superfine sand which should be considered specifically when concrete is

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