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Practical Guide

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GRAIN SIZE ANALYSIS

GRAIN SIZE ANALYSIS

AIM To determine the particle size distribution of the given fine aggregate and to determine ,the fineness modulus,the effective size and uniformly coefficent . THEORY Fine aggregate is the sand used in mortars. Coarse aggregate is the broken stone used... (Continue reading)

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BULCKING OF FINE AGGREGATE

BULCKING OF FINE AGGREGATE

AIM To study the behaviour of sand grains under varying percentage of moisture content . APPARATUES. 250 ml measuring cylinder ,weighing balance etc . PROCEDURE (i) Take 500gm (W1) of the aggregate. (ii) Keep the sample in an oven in... (Continue reading)

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BULK DENSITY AND PERCENTAGE VOIDS OF AGGREGATES

BULK DENSITY AND PERCENTAGE VOIDS OF AGGREGATES

Aim To determine the bulk density and percentage voids of aggregate . Apparatus (I)Balance -A balance sensitive to 0.5% of the weight of the sample to be weighed . (ii) Cylindrical Metal Measure- The measure shall be of 3,15 or... (Continue reading)

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SPECIFIC GRAVITY OF FINE AND CORSE AGGREGATES

SPECIFIC GRAVITY OF FINE AND CORSE AGGREGATES

AIM To determine the specific gravity of given sample of fine and coarse aggregates.   SPECIFIC GRAVITTY OF COARSE AGGREGATE. Apparatus A balance or scale of capacity not less than 3 kg, readable and accurate to 0.5 g and of... (Continue reading)

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AGGREGATE CRUSHING VALUE

AGGREGATE CRUSHING VALUE

AIM To determine the aggregate crushing value of coarse aggregate. ”The aggregate crushing value gives a relative measure of the resistance of an aggregate crushing under gradually applied compressive load . With aggregate crushing value 30 or higher’ the result... (Continue reading)

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SOUNDNESS OF CEMENT

SOUNDNESS OF CEMENT

AIM To determine the soundness of cement by the Le-chatelier method   APPARATUS Le- chatelier mould The mould consist of a small split cylinder of spring brass or other suitable metal of 0.5mm thickness forming of a mould 30mm internal... (Continue reading)

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SPECIFIC GRAVITY OF CEMENT

SPECIFIC GRAVITY OF CEMENT

AIM To determine the specific gravity is normally defined as the ratio between the weight of a given volume of material and weight of an equal volume of water.To determine the specific gravity of cement, kerosene which doe snot recent... (Continue reading)

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COMPRESSIVE STRENGTH TEST ON CONCRETE CYLINDERS

COMPRESSIVE STRENGTH TEST ON CONCRETE CYLINDERS

AIM To determine the compressive strength of concrete cylinders. APPARATUS Compression testing machine, cylinder mould of 150mm diameter and 300mm height, weighing balance. PROCEDURE (i) Cast the cylinder and cure for 28 days. (ii) Takeout the specimen from the curing... (Continue reading)

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DETERMINATION OF MODULUS OF ELASTICITY OF CONCRETE

DETERMINATION OF MODULUS OF ELASTICITY OF CONCRETE

AIM To determine the modulus of elasticity of concrete. SPECIMEN Concrete calender 15 cm diameter and 30cm long PROCDURE Setting Up of Compressometer (i) Assemble the top and bottom frame by keeping the spacers in position. (ii) Keep the pivot... (Continue reading)

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SPLITTING TENSILE STRENGTH TEST ON CONCRETE CYLENDERS

SPLITTING TENSILE STRENGTH TEST ON CONCRETE CYLENDERS

AIM To determine the splitting tensile of concrete. APPARATUS Compression testing machine, two packing strips of plywood 30 cm long and 12mm wide. SAMPLING MOULDS The cylinder mould shall is of metal ,3mm thick. Each mould is capable of being... (Continue reading)

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HYDRAULICS LABORATORY EXPERIMENTS

HYDRAULICS LABORATORY EXPERIMENTS

1. CALIBRATION OF VENTURIMETER 2. CALIBRATION OF ORIFICEMETER 3.CALIBRATION OF VARIOUS TYPES NOTCHES 4. META CENTRIC HEIGHT OF A FLOATING BODY 5. DETERMINATION OF DARCY’S & CHEZY’S CONSTANT FOR PIPE FLOW 6. HYDRAULIC COEFFICIENTS OF ORIFICE 7. CALIBRATION OF WATER... (Continue reading)

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REYNOLDS EXPERIMENT

REYNOLDS EXPERIMENT

OBJECTIVE: To perform the Reynolds experiment for determination of different regimes of flow. BASICS: The flow of real fluids can basically occur under two very different regimes namely laminar and turbulent flow. The laminar flow is characterized by fluid particles... (Continue reading)

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VERIFICATION OF BERNOULLI’S THEOREM

VERIFICATION OF BERNOULLI’S THEOREM

OBJECTIVE: To verify Bernoulli’s theorem EQUIPMENT: a)Apparatus for the verification of Bernoulli’s theorem b)measuring tank and c)a stop watch BASICS: Bernoulli’s theorem states that for a stream lined, steady, frictionless and incompressible fluid flow, the sum of pressure head, velocity... (Continue reading)

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CHEZY’S CONSTANT AND MANNING’S COEFFICIENT FOR OPEN CHANNELS

CHEZY’S CONSTANT AND MANNING’S COEFFICIENT FOR OPEN CHANNELS

OBJECTIVE: i. To find Chezy’s constant for open channels. ii. To find Manning’s Roughness coefficient for the given open channel. iii. To draw the following graphs for two different slopes of channel. iv. Chezy’s constant C vs. Reynolds number. v.... (Continue reading)

CALIBRATION OF WATER METER

OBJECTIVE: (i) To calibrate the given water meter EQUIPMENT: a) Water meter of size 25 mm with a needle and number gauge b) Measuring tank of size .6x.6x.8 meter with over flow arrangement, gauge glass scale arrangement and a grain... (Continue reading)

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HYDRAULIC COEFFICIENTS OF ORIFICE

HYDRAULIC COEFFICIENTS OF ORIFICE

OBJECTIVE: (i) To determine the hydraulic coefficients, coefficient of discharge (Cd) coefficient velocity ( Cv) and coefficient contraction (Cc) of the given orifice fitted on a tank. (ii) To draw the graph Cd vs Hw. EQUIPMENT: a) The given orifice... (Continue reading)

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