FINENESS OF CEMENT BY BLAINES AIR PERMEABILITY METHOD (IS-4031-PART-2)

Overview Blaine’s air permeability apparatus consists essentially of a means of drawing a definite quantity of air through a prepared bed of cement of definite porosity. The fineness is expressed as a total surface area in square centimeters per gram. Apparatus Measuring instruments Name Range Accuracy Blaine air permeability apparatus Refer to IS:5516 Balance 3 … Read more

FIELD TESTS ON CEMENT FOR QUALITY CONTROL PURPOSE

Field test on cement

Field Tests on Cement There are some field tests which gives some basic idea about the quality of the cement without elaborate facility of laboratory in the field. These tests are as given under Date of manufacture should be seen on the bag. It is important because the strength reduces with age. Open the bag … Read more

SPECIFIC GRAVITY/DENSITY OF HYDRAULIC CEMENT (IS:4031-Part 11-1988)

Overview Specific gravity is defined as the ratio between the weight of a given volume of cement and weight of an equal volume of water. Apparatus Measuring Instruments NAME CAPACITY / RANGE / SIZE ACCURACY / LEAST COUNT Lechatelier flask Balance Water bath Other Apparatus  Tray Environmental Conditions Temp Relative humidity Test Procedure Dry the Le-chatelier … Read more

COMPRESSIVE STRENGTH OF HYDRAULIC CEMENT(IS:4031-Part 6-1988)

Cement Mould

Overview Compressive strength of cement is determined by compressive strength test on mortar cubes compacted by means of a standard vibration machine. Standard sand (IS:650) is used for the preparation of cement mortar. The specimen is in the form of cubes 70.6mm*70.6mm*70.6mm. Apparatus Measuring Instruments NAME CAPACITY / RANGE / SIZE ACCURACY / LEAST COUNT Cube … Read more

SOUNDNESS OF CEMENT BY AUTOCLAVE METHOD (IS:4031-Part 3-1988)

Overview In the soundness test a specimen of hardened cement paste is boiled for a fixed time so that any tendency to expand is speeded up and can be detected. Soundness means the ability to resist volume expansion. Apparatus Measuring Instruments NAME CAPACITY / RANGE / SIZE ACCURACY / LEAST COUNT Autoclave 1000C (min) 10C Length … Read more

SOUNDNESS OF CEMENT BY LE-CHATELIERS METHOD (IS:4031-Part 3-1988)

Le chatelier Apparatus

Overview In the soundness test a specimen of hardened cement paste is boiled for a fixed time so that any tendency to expand is speeded up and can be detected. Soundness means the ability to resist volume expansion. Apparatus Measuring Instruments NAME CAPACITY / RANGE / SIZE ACCURACY / LEAST COUNT Le-chatelier apparatus  Should be made … Read more

FINENESS OF CEMENT BY DRY SIEVING (IS:4031-Part 1-1996)

90 micron sieve

Overview Fineness of cement is measured by sieving it on standard sieve. The proportion of cement of which the grain sizes are larger than the specified mesh size is thus determined. Apparatus Measuring Instruments NAME CAPACITY / RANGE / SIZE ACCURACY / LEAST COUNT Sieve 90 micron mesh — Balance 10g (max.) 10 mg Supplementary accessories … Read more