Explain the procedure for determination of compressive strength of cement in laboratory.

Explain the procedure for determination of compressive strength of cement in laboratory.
by

1 Answer

Answer :

Procedure for determination of compressive strength of cement in laboratory: 1. Take 200 gm cement, 600 gm standard sand and add water ((p/4)+3) % to that of combined weight of cement and sand. Prepare homogenous mortar. 2. Fill the prepared mortar in the cube mould of size 7.07 cm side by proper compaction. Compact the filled mould on vibrating machine for 3-5 minutes. 3. Keep filled moulds at room temperature for 24 hours and 90% humidity for initial hardening. 4. Remove cube moulds and keep cement cubes under fresh water for curing for 7, 14, 21, 28 days. 5. Remove cube from water after curing period and keep it under compression testing machine (CTM) for testing. 6. Apply compressive load at a rate of 35 N/mm2 till failure of cube. 7. Note down the failure load in kN shown by red pointer of dial gauge. 8. Calculate compressive strength of cement cube by dividing failure load in N to cross sectional area of cube in mm2 . 9. Calculate average compressive strength of three test cubes in N/mm2 . 

by

Related questions

Explain the laboratory procedure to determine the compressive strength of concrete cubes as per IS-516-1959 with reference to following points: i. Preparation of test specimen ii. Procedure of testing iii. Interpretation of results

Description : Explain the laboratory procedure to determine the compressive strength of concrete cubes as per IS-516-1959 with reference to following points: i. Preparation of test specimen ii. Procedure of testing iii. Interpretation of results

Last Answer : Preparation of test specimen: i. Take three cubes of 15 cm sides and apply oil to its inner surface. ii. Prepare the concrete mixture of required grade and fill it in each mould in 3 layers. ... say 23N/mm 2) than the specified grade M20, then that concrete is safe and good for construction.

For the determination of shear strength parameters, c and , of soil in the laboratory, the test to be conducted will be (a) Triaxial compression test (b) Sieve analysis (c) Compaction test (d) Relative density test

Description : For the determination of shear strength parameters, c and , of soil in the laboratory, the test to be conducted will be (a) Triaxial compression test (b) Sieve analysis (c) Compaction test (d) Relative density test

Last Answer : (a) Triaxial compression test

Explain the rebound hammer test procedure and show the relationship between compressive strength and rebound number with hammer horizontal and vertical on dry and wet surface of concrete.

Description : Explain the rebound hammer test procedure and show the relationship between compressive strength and rebound number with hammer horizontal and vertical on dry and wet surface of concrete.

Last Answer : Rebound Hammer Test: i. Initially the plunger of rebound hammer is Kept touching to the target concrete surface ii. Then the tubular casing of hammer is pushed towards concrete, so that the spring gets ... of concrete will be less, But if it is more, then concrete possess sufficient strength.

Explain the procedure to determine compressive strength of concrete in lab.

Description : Explain the procedure to determine compressive strength of concrete in lab.

Last Answer : Procedure to determine compressive strength of concrete in lab: The following steps are essential to determine the compressive strength of concrete in the laboratory. 1. Take three cube moulds of 15 cm side and ... in mm2 . 8. Calculate average compressive strength of three test cubes in N/mm2 . 

The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2 /gm. (A) 800 (B) 1600 (C) 4000 (D) 8500

Description : The compressive strength of cement should not be less than about 110Kg/cm2 after three days & not less than 170Kg/cm2 after seven days. The fineness of an ordinary cement as determined by turbidimetric method should be about __________ cm2 /gm. (A) 800 (B) 1600 (C) 4000 (D) 8500

Last Answer : (B) 1600

Pick up the incorrect statement from the following. For performing compressive strength test of cement (A) Cement and standard sand mortar are used in the ratio of 1 : 3 (B) Water is added at the rate of (P/4) + 3.0 percentage of water where P is the percentage of water for standard consistency (C) A cube mould of 10 cm × 10 cm × 10 cm is used (D) The prepared moulds are kept in a atmosphere of 50% relative humidity

Description : Pick up the incorrect statement from the following. For performing compressive strength test of cement (A) Cement and standard sand mortar are used in the ratio of 1 : 3 (B) Water is added at the ... cm 10 cm is used (D) The prepared moulds are kept in a atmosphere of 50% relative humidity

Last Answer : Answer: Option A

Pick up the correct statement regarding low heat cement from the following: (A) It possesses less compressive strength (B) Its initial setting time is about one hour (C) Its final setting time is about 10 hours (D) All the above

Description : Pick up the correct statement regarding low heat cement from the following: (A) It possesses less compressive strength (B) Its initial setting time is about one hour (C) Its final setting time is about 10 hours (D) All the above

Last Answer : Answer: Option D

Le-Chatelier's device is used for determining the (A) Setting time of cement (B) Soundness of cement (C) Tensile strength of cement (D) Compressive strength of cement

Description : Le-Chatelier's device is used for determining the (A) Setting time of cement (B) Soundness of cement (C) Tensile strength of cement (D) Compressive strength of cement

Last Answer : Answer: Option B

According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than (A) 7 MPa (B) 11.5 MPa (C) 16 MPa (D) 21 MPa

Description : According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than (A) 7 MPa (B) 11.5 MPa (C) 16 MPa (D) 21 MPa

Last Answer : Answer: Option C

Soundness of cement is tested by (A) Vicat's apparatus (B) Le-chatelier apparatus (C) Compressive strength testing apparatus (D) None of these

Description : Soundness of cement is tested by (A) Vicat's apparatus (B) Le-chatelier apparatus (C) Compressive strength testing apparatus (D) None of these

Last Answer : Answer: Option B

For testing compressive strength of cement, the size of cube used is (A) 50 mm (B) 70.6 mm (C) 100 mm (D) 150 mm

Description : For testing compressive strength of cement, the size of cube used is (A) 50 mm (B) 70.6 mm (C) 100 mm (D) 150 mm

Last Answer : B

For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of (A) 1 : 2 (B) 1 : 3 (C) 1 : 4 (D) 1 : 6

Description : For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of (A) 1 : 2 (B) 1 : 3 (C) 1 : 4 (D) 1 : 6

Last Answer : Answer: Option B

For performing the compressive strength test of cement, the size of cube mould should be (a) 7.06cm (b)75mm (c)80mm (d)All the above

Description : For performing the compressive strength test of cement, the size of cube mould should be (a) 7.06cm (b)75mm (c)80mm (d)All the above

Last Answer : (a) 7.06cm

The compressive strength an ordinary Portland cement (1:3) after 7 days test should not be less than. (a) 11N/mm2 (b) 17.5 N/mm2 (c) 22 N/mm2 (d) 27.5N/m2

Description : The compressive strength an ordinary Portland cement (1:3) after 7 days test should not be less than. (a) 11N/mm2 (b) 17.5 N/mm2 (c) 22 N/mm2 (d) 27.5N/m2

Last Answer : (b) 17.5 N/mm2

Which of the following cements is expected to have the highest compressive strength after 3 days (a) Ordinary Portland cement (b) Rapid hardening cement (c) High alumina cement (d) Sulphate resisting cement.

Description : Which of the following cements is expected to have the highest compressive strength after 3 days (a) Ordinary Portland cement (b) Rapid hardening cement (c) High alumina cement (d) Sulphate resisting cement.

Last Answer : (c) High alumina cement

Minimum compressive strength of cement required at the age of 3 days for ordinary Portland cement of grade 33 is [ A ] 1.15 N/mm2 [ B ] 11.5 N/mm2 [ C ] 2.10 N/mm2 [ D ] 21 N/mm2

Description : Minimum compressive strength of cement required at the age of 3 days for ordinary Portland cement of grade 33 is [ A ] 1.15 N/mm2 [ B ] 11.5 N/mm2 [ C ] 2.10 N/mm2 [ D ] 21 N/mm2

Last Answer : [ B ] 11.5 N/mm2

For determining the compressive strength test on cement is, the percentage amount of water to be added as (Pa = Percentage of water for required consistency) [ A ] 0.25 Pa + 2.5 [ B ] 0.25 Pa + 3.5 [ C ] 0.35 Pa + 2.5 [ D ] 0.35 Pa + 3.5

Description : For determining the compressive strength test on cement is, the percentage amount of water to be added as (Pa = Percentage of water for required consistency) [ A ] 0.25 Pa + 2.5 [ B ] 0.25 Pa + 3.5 [ C ] 0.35 Pa + 2.5 [ D ] 0.35 Pa + 3.5

Last Answer : [ B ] 0.25 Pa + 3.5

Le Chatelier apparatus is used to determine which of the following properties for cement A) Soundness* b) Initial setting time c) Compressive strength d) Tensile strength

Description : Le Chatelier apparatus is used to determine which of the following properties for cement A) Soundness* b) Initial setting time c) Compressive strength d) Tensile strength

Last Answer : A) Soundness*

Laboratory determination of the diffusivity of vapor is done by __________ method. (A) Wetted wall column (B) Gilliland's (C) Winkelmann's (D) Wike's

Description : Laboratory determination of the diffusivity of vapor is done by __________ method. (A) Wetted wall column (B) Gilliland's (C) Winkelmann's (D) Wike's

Last Answer : (C) Winkelmann's

Define specific gravity of soil. Explain the stepwise procedure of determination of specific gravity of soil by pycnometer.

Description : Define specific gravity of soil. Explain the stepwise procedure of determination of specific gravity of soil by pycnometer. 

Last Answer : Specific Gravity: It is ratio of unit weight in air of a given volume of soil solids at a specific temperature to unit weight in air of an equal volume of distilled water at same temperature. ... Repeat all above steps two more times to calculate average specific gravity of given soil sample.

State the step by step procedure for determination of OMC and MDD using standard proctor test and explain compaction curve.

Description : State the step by step procedure for determination of OMC and MDD using standard proctor test and explain compaction curve. 

Last Answer : Procedure: 1. Take about 5 Kg. of de-aired soil passing through sieve 20mm in tray. 2. Add about 4% water (approximately 120ml) to the soil and mixed thoroughly with trowel and cover it ... decreases. Since there is formation of double layer of water around soil particles in the same volume.  

Explain laboratory procedure for mechanical sieve analysis of soil.

Description : Explain laboratory procedure for mechanical sieve analysis of soil.

Last Answer : Laboratory Procedure for mechanical sieve Analysis Mechanical in laboratory 1) Dry sieve Analysis 2) Wet sieve analysis Apparatus required for test - i) Weighing balance accurate to 1g and 0.1g ... through the set of sieves. The material retained on each sieve is weighed and analysed

Explain the procedure for measurement of density of an oil in laboratory.

Description : Explain the procedure for measurement of density of an oil in laboratory.

Last Answer : Procedure: i. Weigh the empty mass of measuring cylinder by using electronic weighing balance. Record the mass in kg (W1) ii.Pour 100 ml oil in measuring cylinder. Use a dropper to add or remove ... to calculate density of an oil. vi.Use following relation to calculate density of an oil.

Explain procedure to find specific gravity of the fine aggregate in laboratory.

Description : Explain procedure to find specific gravity of the fine aggregate in laboratory.

Last Answer : Procedure to find specific gravity of fine aggregate in laboratory: 1. Take 2000 gm. aggregate sample in wire basket. Immerse the basket in water completely and take it out to remove entrapped air. ... ). 8. Repeat all above steps for two more samples to get average specific gravity of aggregate.

State the procedure for the determination of water content by oven-drying method.

Description : State the procedure for the determination of water content by oven-drying method.

Last Answer : i) This is commonly adopted and simplest method for determination of water content of a soil sample in the laboratory. ii) The method basically consists of drying a weighed moist sample of soil in an oven ... The above table gives the minimum quantity of soil sample to be taken for test.  

Write down the procedure for determination of tacheometric constants.

Description : Write down the procedure for determination of tacheometric constants.

Last Answer : Method of determining tacheometric constants in the field1) A fairly level ground is selected. The tacheometer is set up at O and pegs are fixed at A, B & C, known distances apart. 2) The staff ... 5) By solving the equations in pairs, find tacheometric constants (f/i) and (f+d)

Describe the procedure for determination of workability by compaction factor method.

Description : Describe the procedure for determination of workability by compaction factor method.

Last Answer : Procedure for determination of workability by compaction factor method: The procedure of determining the workability of concrete using compaction factor as per IS: 1199-1959 is as follows. 1. Take the freshly ... upon calculated C.F., the degree of workability can be designated as follows. 

Write step by step procedure for determination of specific gravity by pycnometer bottle.

Description : Write step by step procedure for determination of specific gravity by pycnometer bottle. 

Last Answer : Procedure for determination of specific gravity by pycnometer bottle: 1. Clean the pycnometer bottle and dry it. Take the weight of empty pycnometer with conical cap as W1' gm. 2. Oven dry the ... 8. Repeat all above steps two more times to calculate average specific gravity of given soil sample.

what is the procedure of breaking sed dormancy by hot water treatment in the laboratory? -Biology

Description : what is the procedure of breaking sed dormancy by hot water treatment in the laboratory? -Biology

Last Answer : answer:

what is the procedure of breaking sed dormancy by hot water treatment in the laboratory? -Biology

Description : what is the procedure of breaking sed dormancy by hot water treatment in the laboratory? -Biology

Last Answer : answer:

What laboratory procedure you would use to separate and recover the components of a mixture containing BaSO4 Na2CO3 and C10H8?

Description : What laboratory procedure you would use to separate and recover the components of a mixture containing BaSO4 Na2CO3 and C10H8?

Last Answer : Na2CO3 is soluble in water and separated by filtration from a water mixture.Naphtalene is separated by heating when sublimation occur.

How is the Gram stain procedure performed in the microbiology laboratory?

Description : How is the Gram stain procedure performed in the microbiology laboratory?

Last Answer : In the laboratory, a heat- fixed smear of bacteria is stained with crystal violet for one minute. Then, iodine,which acts as a mordant, is added to the smear for one minute, and the remainder ... the stains are examined under the microscope and the color of the bacteria reveals the Gram reaction.  

Write step by step procedure to determine coefficient of permeability of fine grained soil by falling head method in laboratory.

Description : Write step by step procedure to determine coefficient of permeability of fine grained soil by falling head method in laboratory.

Last Answer : This method is suitable for fine grained soil as quantity of water collected through soil mass is very less and cannot be measured accurately 2. The falling head test is used for relatively less permeable ... equal to the difference of water level in the stand pipe and the bottom tank. 

Write step by step procedure to determine specific gravity of soil by pycnometer in laboratory.

Description : Write step by step procedure to determine specific gravity of soil by pycnometer in laboratory.

Last Answer : 1. Clean the pycnometer and dry it, find the mass of pycnometer, brass cap and washer accurate to 1g. say M1 2. Put about 200gm to 400gm of wet soil sample in pycnometer and find its mass with its cap ... it top of cap and find its weight say M4. 5. The specific gravity is calculated by 

Write the laboratory procedure to determine liquid limit by Casagrande’s method with neat sketch.

Description : Write the laboratory procedure to determine liquid limit by Casagrande’s method with neat sketch.

Last Answer : Procedure of liquid limit 1. Take about 120 gm of air dried soil sample passing through 425 micron IS Sieve in metal tray. 2. Add 20% distilled water to form uniform soil paste. 3. Put this soil paste in the ... graph as liquid limit (wL) of given soil sample.  (ii) Grooving Toos  

In the method of voids for determination of the quantity of cement paste, it is assumed that (A) Voids in coarse aggregates are filled by fine aggregates (B) Voids in fine aggregates are filled by the cement paste (C) Volume of fine aggregates is equal to total voids in coarse aggregates plus 10% extra (D) All the above

Description : In the method of voids for determination of the quantity of cement paste, it is assumed that (A) Voids in coarse aggregates are filled by fine aggregates (B) Voids in fine aggregates are filled by ... of fine aggregates is equal to total voids in coarse aggregates plus 10% extra (D) All the above

Last Answer : Answer: Option D

If ‘W’ is the percentage of water required for normal consistency of cement, water to be added for determination of initial setting time is (a) 0.50 W (b) 0.62 W (c) 0.75 W (d) 0.85 W

Description : If ‘W’ is the percentage of water required for normal consistency of cement, water to be added for determination of initial setting time is (a) 0.50 W (b) 0.62 W (c) 0.75 W (d) 0.85 W

Last Answer : (d) 0.85 W

Calculate quantity of water to be added for casting cubes in laboratory by 12.5 kg cement if w/c ratio 0.45.

Description : Calculate quantity of water to be added for casting cubes in laboratory by 12.5 kg cement if w/c ratio 0.45. 

Last Answer : As w/c = (weight of water / weight of cement)  w/c = (Ww / Wc)  0.45 = (Ww / 12.5)  Ww = (0.45x12.5)  Ww = 5.625 kg or 5.625 Litres

The asbestos cement sewers are A. Light in weight B. Not structurally strong to bear large compressive stress C. Susceptible to corrosion by sulphuric acid D. All the above

Description : The asbestos cement sewers are A. Light in weight B. Not structurally strong to bear large compressive stress C. Susceptible to corrosion by sulphuric acid D. All the above

Last Answer : ANS: D

For an ordinary Portland cement (A) Residual does not exceed 10% when sieved through IS Sieve No. 9 (B) Soundness varies from 5 to 10 mm (C) Initial setting time is not less than 30 minutes (D) Compressive stress after 7 days, is not less than 175 kg/cm2

Description : For an ordinary Portland cement (A) Residual does not exceed 10% when sieved through IS Sieve No. 9 (B) Soundness varies from 5 to 10 mm (C) Initial setting time is not less than 30 minutes (D) Compressive stress after 7 days, is not less than 175 kg/cm2

Last Answer : (C) Initial setting time is not less than 30 minutes

Plain cement concrete is strong in taking (a) Compressive stress. (b) Tensile stress (c) Shear stress (d) All of these

Description : Plain cement concrete is strong in taking (a) Compressive stress. (b) Tensile stress (c) Shear stress (d) All of these

Last Answer : (a) Compressive stress.

Reinforced cement concrete is equally strong in taking (a) Tensile and compressive stress (b) Compressive and shear stresses. (c) Tensile, compressive and shear stresses. (d) Tensile and shear stresses.

Description : Reinforced cement concrete is equally strong in taking (a) Tensile and compressive stress (b) Compressive and shear stresses. (c) Tensile, compressive and shear stresses. (d) Tensile and shear stresses.

Last Answer : (c) Tensile, compressive and shear stresses.

Has anyone (in this case a true warrior) ever made you feel like a giant ass, but in a really good way? (Someone that inspires you with their strength and determination)

Description : Has anyone (in this case a true warrior) ever made you feel like a giant ass, but in a really good way? (Someone that inspires you with their strength and determination)

Last Answer : I’m having a hard day today. Someone I really love and look up to has read me the riot act and made me feel terrible. It hasn’t or doesn’t help me or inspire me and it doesn’t make me feel good. Sorry it is just a really hard day and things are pretty rough.

The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated (A) Sands (B) Clays (C) Gravels (D) Highly organic soils

Description : The vane shear test is used for the in-situ determination of the undrained strength of the intact fully saturated (A) Sands (B) Clays (C) Gravels (D) Highly organic soils

Last Answer : (B) Clays

Explain the procedure to determine fineness of cement by dry sieving method. State its IS requirement.

Description : Explain the procedure to determine fineness of cement by dry sieving method. State its IS requirement.

Last Answer : Procedure to determine fineness of cement by dry sieving method: 1. Take the 100 gm of cement sample given using balance as initial weight as W1 gm. 2. Take 90 micron IS sieve and keep pan at bottom. 3. Place the ... . ii) Rapid hardening Cement (RHC): 5 % max. iii) Low Heat Cement (LHC): 5 % max.

Why does metal have a high compressive strength?

Description : Why does metal have a high compressive strength?

Last Answer : Need answer

Cast iron has very high (A) Compressive strength (B) Ductility (C) Shock resistance (D) Resistance to brittleness

Description : Cast iron has very high (A) Compressive strength (B) Ductility (C) Shock resistance (D) Resistance to brittleness

Last Answer : (A) Compressive strength

Which of the following has the highest compressive strength? (A) Wrought iron (B) Cast iron (C) Mild steel (D) High carbon steel

Description : Which of the following has the highest compressive strength? (A) Wrought iron (B) Cast iron (C) Mild steel (D) High carbon steel

Last Answer : (D) High carbon steel

Steel rods are used in reinforced concrete to increase its __________ strength. (A) Shear (B) Tensile (C) Compressive (D) None of these

Description : Steel rods are used in reinforced concrete to increase its __________ strength. (A) Shear (B) Tensile (C) Compressive (D) None of these

Last Answer : (B) Tensile

Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about (A) Half (B) One third (C) One fifth (D) One twelfth

Description : Compressive strength of wood is usually more along the grains. The tenile strength of wood as compared to that of steel is about (A) Half (B) One third (C) One fifth (D) One twelfth

Last Answer : (C) One fifth