Civil Engineer Notebook

 BULK DENSITY TEST OF COARSE AGGREGATE AIM: The bulk density of the coarse aggregate could be found out. BULK DENSITY: Bulk density is that mass of substance by unit volume and is in kg/lit as per the requirement of this standard. APPARATUS: 1. Density cylinder 2. Weighing Balance 3. Tamping Rod 4. Shovel SAMPLE: This test is usually conducted on dry aggregate that fee that does not contain any unwanted materials. See: Reference IS: 2386 (Part III) 1963). PROCEDURE: 1. Weigh out to the nearest 0.1gm. 50g of the sample. 2. Pour the sample in an appropriate graduated cylinder and fill the sample in three layers. 3. The sample will be packed to be approximately one-third full with thoroughly mixing aggregate and tamped 25strokes of the rounded end of the tamping rod. 4. Another similar measure of aggregate would then be added and 25 strokes more of tamping would then be rendered. 5. Up to 25 times there should be the last layer filled to overflowing and tamping. 6. The aggregate has t...

  SPECIFIC GRAVITY TEST OF COARSE AGGREGATE AIM: To determine the Specific gravity of the aggregate using Pycnometer . APPARATUS REQUIRED: 1. Pycnometer of about 1 litter capacity 2. Weighing balance, with an accuracy of 1g.                  3. Vacuum pump  4. Oven                                                                                           SAMPLE: The sample of 2000g to 1000g of aggregate shall be taken for tested. The aggregate which have been heated artificially shall not be taken. Reference IS: 2386 (Part III) – 1963 ). ads PROCEDURE: 1. A sample of 1kg for 10mm to 4.75mm size and 500gm for less than 4.75mm size. The sample is placed in a tray and fully covered w...

SILT CONTENT TEST OF FINE AGGREGATE AIM: To determine the Silt content in the Fine aggregate. APPARATUS REQUIRED: Glass Measuring jar                                                                                               PROCEDURE: A measuring jar of (200 – 500ml) should be half filled with the sample. Water is added to the jar up to the 3/4th of its full capacity. The jar with water should be shaken for at least 30seconds, so that all the silt particle get mixed with water and jar is kept in undisturbed condition for two hour. After the clay and silt content settle down, the height of the clay and silt standing over the fine aggregate should be measured. ads OBSERVATION:   SI.No   Trail  ...

STANDARD CONSISTENCY TEST OF CEMENT  AIM: To determine the quantity of water required to produce a cement paste of standard consistency. APPARATUS REQUIRED:  Vicat apparatus and plunger  Measuring jar Metal tray  Weigh balance STANDARD CONSISTENCY:  The standard consistency of the cement paste is defined that consistency, which will permit the Vicat plunger to penetrate to a point 5 to 7mm from the bottom of the Vicat mould when the cement paste is tested. SAMPLE: The cement taken should be finely ground material which of addition of requisite quantity of water is capable of hardening both under water and in air by the chemical interaction of its constituents with water and capable of binding together the appropriate materials. (Reference IS: 3535 - 1986) PROCEDURE:  Take 500g of cement and prepare a paste with water (24% by weight of the cement) for first trial. The paste must be filled in to Vicat mould within 3 to 5 minutes of mixing them The gaugi...

FINENESS TEST OF CEMENT   AIM:           To determine the fineness of cement. APPARATUS REQUIRED: IS: 90 micron sieve  Weighing balance  Brush  Tray & Trowel Stopper jar SAMPLE: The cement taken should be finely ground material which of addition of requisite quantity of water is capable of hardening both under water and in air by the chemical interaction of its constituents with water and capable of binding together the appropriate materials. (Reference IS: 3535 - 1986) PROCEDURE:  Agitate the sample of cement to be tested by shaking for 2minutes in a stopper jar Stir the resulting powder gently by using a clean rod in order to distribute the fineness throughout the cement. Weigh approximately 10g of cement to the nearest 0.01g and place it on the sieve (W1) Agitate the sieve by swirling, planetary and linear movement until no fine material passes through it. Remove and weigh the residue (R1)  Repeat the procedure using a...