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)
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)
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)
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)
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)
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)
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)
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)
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)
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)
Properties of Hardened Concrete Early volume change Creep Properties Permeability Stress-Strain Relation I. Early Volume Change (Shrinkage) What is the problem? >> May result in cracking Plastic Shrinkage Due to water loss from fresh paste by evaporation or from suction... (Continue reading)
Penetration value is a measure of hardness or consistency of bituminous material. It is the vertical distance traversed or penetrated by the point of a standard needle in to the bituminous material under specific conditions of load, time and temperature.... (Continue reading)
Compaction factor apparatus’ trowels, hand scoop (15.2 cm long), a rod of steel or other suitable material (1.6 cm diameter, 61 cm long rounded at one end ) and a balance.... (Continue reading)
To determine the compressive strength of concrete specimens prepared and to verify the strength requirements as desired in the mix design and stipulated in the IS code.... (Continue reading)
To study the workability (determine the consistency) of prepared concrete either in the laboratory or laboratory or during the progress of work in the field and to check the uniformity of concrete from batch to batch.... (Continue reading)
Take 200gm of cement and 600gm of standard sand in the proportion 1:3 by weight) in a pan. (The standard sand shall be of quartz, of light, gray or whitish variety and shall be free from silt. The sand grains... (Continue reading)