01 a straight sided container like a 1 kg jam jar, or a clean, empty cane 02 a steel measuring rule 03 a steel rod to support the sand 04 a second container to immerse it into, and some water Method: Initially, load the A sample of moist fine aggregate is filled into a measuring cylinder in the normal manner Note down the level, say H1 Pour water into the Bulking OF Fine Aggregates Learning Take 100 gm of given sand sample and fill it in measuring cylinder about one third of its weight Take this volume of sand V1 ml Now add 2% water by weight in sand initially Shake the cylinder vigoursly using palm at top and bottom to cylinder Note down the increased volume of sand V2 ml Calculate % bulking of sand as b1 = ((V2 V1)/ V1] x 100Explain determination of bulking of fine aggregate with
Test Procedure Take the sample sand and fill the measuring cylinder up to 200 ml To make the necessary correction use the steel rule but don’t A Procedure for Compacted Bulk Density Measure the volume of the cylindrical metal measure by pouring water into the metal measure and record the volume “V” in litre Fill the cylindrical metal measure about onethird full with thoroughly mixed aggregate and tamp it 25 times using tamping bar Add another layer of onethird volume of HOW TO TEST AGGREGATE FOR BULK DENSITY AND obtained by heating the aggregate quickly in an open pan The process can also be speeded up by pouring inflammable liquid such as methylated spirit or acetone over the aggregate and igniting it 15 Testing of aggregates 151 Bulking of Aggregates The free moisture content in fine aggregate results in bulking of volume Bulking phenomenon can be1 Lecture 6: Testing of aggregates
The Fineness Modulus is used in US practice and is a measure of the grading of fine aggregates It can be calculated from a sieve analysis by adding the cumulative percentages of fine aggregates retained on the following sieve sizes; 015mm, 030mm, 060mm, 118mm, 236mm and 475m This value is then divided by 100 to give the fineness modulusThe Aggregates (fine + coarse) generally occupy 60% to 75% of the concrete volume or 70% to 85% by mass and strongly influence the concrete’s freshly mixed and hardened properties, mixture proportions, and economy All Aggregates pass Sieve Analysis of Fine Aggregates Procedure and Test Determination of Bulking of Sand The apparatus and procedure to determine percentage bulking of fine aggregates is described below 1 Laboratory Test for Bulking of Sand Apparatus 250ml measuring cylinder; Weighing balance; Fine aggregate; Procedure Take 500 grams of fine aggregate over dried at a temperature of 100 to 110 degree Celsius for Bulking of Sand – Cause, Tests and Importance The
Bulking of Sand – Cause, Tests and Importance Bulking of fine aggregate or sand is the phenomenon of increase in sand volume due to the increase of moisture content Bulking test on fine aggregates has to be performed before 12 5) Templates for belt sampling Sample Reduction Equipment required for AASHTO T 248: 1) Mechanical splitters 2) Buckets Sieve Analysis Equipment required for AASHTO T 27 1) Sieves for coarse aggregates 15 in x 23 in or 14 in x 14 in screensInspection Sampling Procedures for Fine Coarse 01 a straight sided container like a 1 kg jam jar, or a clean, empty cane 02 a steel measuring rule 03 a steel rod to support the sand 04 a second container to immerse it into, and some water Method: Initially, load the Bulking Test Of Sand Importance Of Bulking Of
sand and particularly the manufactured fine aggregate bulks as much as about 40 per cent Due to the bulking, fine aggregate shows completely unrealistic volume Therefore, it is absolutely necessary that consideration must be given to the effect of bulking in proportioning the concrete by volume1Size of fine aggregates: The largest size that falls under the limit of the exact set is 475 mm Using the largest size will give more dense concrete, but a mixture of all sizes is more desirable and more economical If cement mortar is prepared for masonry work or plastering work, very fine types of sand of similar size is usedFine Aggregates: Types, Properties Uses in construction Essential Points Most of the aggregates possess a relative density within 24 – 29 with a similar particle density of about 24002900 Kg/m 3 (150181 lb/ft 3); Hereabouts, for coarse aggregates, the standard test process has Density of Cement, Sand and Aggregate, Bulk
If the volume is unit then, Bulk Density= Mass Unit in kg/m 3 or lb/ft 3 In this definition, the volume is that contains both the aggregates and the voids between aggregates particles The approximate bulk density of aggregate that is commonly used in normalweight concrete is between 12001750 kg/m3 (75110 lb/ft3) Concrete Technology Multiple Choice Questions on “Bulking of Aggregates” 1 What do you mean by bulking? a) The volume increase of fine aggregate due to presence of moisture content in it b) The moisture present in aggregate forms a film around each particle c) Fine aggregate shows completely realistic volume250+ TOP MCQs on Bulking of Aggregates and Answers Cement = 1440 kg/cum ; Fine Aggregate = 1600 kg/cum ; Coarse Aggregate = 1450 kg/cum ; Water = 1000 kg/cum The dry loose density varies for Considering a concrete mix proportion (by volume) of 1:2:4 ie, Cement: Fine aggregate (Sand) : Coarse Aggregate is in the ratio of 1:2:4 by volume Cement required = 01 bag = 50 kg ~ 36 liters or 0036 cumHow to Calculate Cement, Sand and Aggregate required
1 ton 10mm 20mm 40mm aggregate convert to cubic meter (m3) 1 ton 10mm aggregate to cubic meter :10mm aggregate or stone chips is categories as fine aggregate, dry density of 10mm aggregate = 1680 kg/m3, it means 1m3 of 10mm aggregate weight is 1680kg or 16ton, 1 ton = 1000kg, 1 ton 10mm aggregate or stone chips to cubic meter = 1000/1680 = Bulking of Sand – Cause, Tests and Importance Bulking of fine aggregate or sand is the phenomenon of increase in sand volume due to the increase of moisture content Bulking test on fine aggregates has to be performed before Bulking of Sand – Cause, Tests and Importance 01 a straight sided container like a 1 kg jam jar, or a clean, empty cane 02 a steel measuring rule 03 a steel rod to support the sand 04 a second container to immerse it into, and some water Method: Initially, load the Bulking Test Of Sand Importance Of Bulking Of
T 27 Sieve Analysis of Fine and Coarse Aggregates T 84 Specific Gravity and Absorption of Fine Aggregate T 85 Specific Gravity and Absorption of Coarse Aggregate T 112 Clay Lumps and Friable Particles in Aggregate T 248 Reducing Field Samples of Aggregate to Testing Size T 304 Uncompacted Void Content of Fine Aggregate sand and particularly the manufactured fine aggregate bulks as much as about 40 per cent Due to the bulking, fine aggregate shows completely unrealistic volume Therefore, it is absolutely necessary that consideration must be given to the effect of bulking in proportioning the concrete by volume1 Lecture 6: Testing of aggregates Test Procedure First, we have to fill the measuring cylinder with 1% solution of salt and water up to 50 ml Add sand to it until the level reaches 100 ml Then fill the solution up to 150 ml level Cover the cylinder and shake it Silt Content Test for Sand (Fine Aggregate)
The level of the fine aggregate is noted as ‘h1’ Now water is poured into the measuring cylinder till the fine aggregate is completely inundated Since the fine aggregate is completely saturated, there are no bulking effects Now its level is noted down as ‘h2’ and the percentage bulking can be calculates using the following formula If the volume is unit then, Bulk Density= Mass Unit in kg/m 3 or lb/ft 3 In this definition, the volume is that contains both the aggregates and the voids between aggregates particles The approximate bulk density of aggregate that is commonly used in normalweight concrete is between 12001750 kg/m3 (75110 lb/ft3) Density of Aggregate Bulk and Relative Density Civil Cement = 1440 kg/cum ; Fine Aggregate = 1600 kg/cum ; Coarse Aggregate = 1450 kg/cum ; Water = 1000 kg/cum The dry loose density varies for Considering a concrete mix proportion (by volume) of 1:2:4 ie, Cement: Fine aggregate (Sand) : Coarse Aggregate is in the ratio of 1:2:4 by volume Cement required = 01 bag = 50 kg ~ 36 liters or 0036 cumHow to Calculate Cement, Sand and Aggregate required
Step 2 – Determine your TDEE Cutting means burning fat To burn fat, you need to create a calorie deficit, and that means providing your body with fewer calories than it needs Faced with this shortfall in calories, your body has no Normal weight aggregates They have a specific gravity between 25 to 27 produce concrete with unit weight ranging from 23 to 26 KN/m 3 and crushing strength at 28 days between 15 to 40 MPa are termed normal weight concrete The commonly used aggregates ie Sands and gravels: crushing rocks such as granites, basalt, quartz, sandstone and Classification of Aggregate Based on Size, Shape, Unit
