Civil Engineer Notebook

  SETTING TIME OF CEMENT AIM:             To determine the initial and final setting time of cement. APPARATUS REQUIRED: Vicat apparatus confirming to IS: 5513-1976 Stop Watch Measuring jar Metal Tray Weigh balance 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: Prepare a neat cement paste by gauging the cement (500g) with 0.85 times the water required to give a paste of standard consistency. The paste shall be gauged in the manner under the condition prescribed in IS: 4031(Part)-1988 Start the stop watch at the instant when the water is added to the cement. Record th...

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...

  COMPRESSIVE STRENGTH TEST OF CEMENT AIM: To find out the compressive strength of cement. APPARATUS REQUIRED: 1. Cube mould (70.6mm X 70.6mm X 70.6mm) 2. Mixing pan 3. Trowel 4. Measuring Jar 5. Tamping Rod 6. Compressed test machine 7. Weigh balance SAMPLE: The cement to be used must be finely powdered material that when an adequate amount of water is added can harden both underwater and in the air resulting in a hardening of constituents through chemical interaction with water as also have a binding effect on the material that needs to be set. Formerly at 3535-1986 (Reference IS: 3535 - 1986 ) PROCEDURE: The standard sand confirming to IS 650 – 1966 is taken for the test. Take 200gm of cement and 600gm of standard sand in the proportion 1:3 by weight in a pan. Mix the cement and sand in dry condition with a trowel for 1minitues and then with water until the mixture is of uniform colour. The quantity of water shall be (p/4+3) % of combined weight of cement and sand where, p is t...

SOUNDNESS TEST OF CEMENT AIM: To identify how much volumetric expansion the cement sample goes through once it is set. APPARATUS REQUIRED: 1. Chatelier test equipment 2. Metal tray 3. Weighing balance 4. Measuring cylinder 5. Thermometer SAMPLE: The cement absorbed must be fine-ground material to which the addition of sufficient amount of water can harden both in water and in the air due to the chemistry of reaction of its materials with water and to have the capacity of binding together the right materials. Oxygenated (Reference IS: 3535 - 1986) PROCEDURE: 1. Before commencing setting time test, do the consistency test to obtain the water required to give the paste normal consistency (P). 2. Prepare a paste by adding 0.78 times the water required to give a paste of standard consistency (i.e. 0.78P) as per IS 4031 (Part 4)-1988. 3. Lightly oil the Le-chatelier mould and place it on a lightly oiled glass sheet. 4. Fill the mould with the prepared cement paste. In the process of ...

  STANDARD CONSISTENCY TEST OF CEMENT AIM: To determine the quantity of water required to produce a cement paste of standard consistency. APPARATUS:  1. Vicat apparatus and plunger   2. Measuring jar 3. Metal tray  4. 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:  1. Take 500g of cement and prepare a paste with water (24% by weight of the cement) for first trial. 2. The paste must be filled in to Vicat mould within 3 to 5 minu...

 SETTING TIME OF CEMENT AIM: To determine the initial and final setting time of cement. APPARATUS REQUIRED: 1. Vicat apparatus confirming to IS: 5513-1976 2. Stop Watch 3. Measuring jar 4. Metal Tray 5. Weigh balance 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: 1. Prepare a neat cement paste by gauging the cement (500g) with 0.85 times the water required to give a paste of standard consistency. 2. The paste shall be gauged in the manner under the condition prescribed in IS: 4031(Part)-1988 3. Start the stop watch at the instant when the water is added to the cement. Record this time (t1). 4. Fill the Vicat mould with the cement paste gauged as above, the mould should be resting on a non-porous ma...

FINNESS OF CEMENT TEST BY DRY SIEVE as per IS 4031 Part - 1 1. Scope : This procedure covers the test method for determining the fineness of cement by dry sieving as represented by the mass of residue left on a standard 90 micron IS Sieve. 2. APPARATUS : Sieve - 90 micron IS Sieve Balance - Balance - The balance shall be accurate to 0.1 percent of the weight of the test sample. Brush - A nylon or pure bristle brush, preferably with 25 to 40 mm bristle, for cleaning the sieve. 3. Test Procedure : Weigh accurately 100gm of cement (Wc) and place it on a 90 micron IS sieve. Break down any air lumps in a sample with fingers without rubbing them on sieve.  Place it on the sieve, being careful to avoid loss. Disperse any agglomerates. Fit the lid over the sieve. Continuously sieve sample by holding the sieve in both hand & Giving wrist motion until no more fine material passes through it. Weight the residue left on the sieve after sieving as (W1). Repeat the procedure for second sampl...