Explain the significance of batching, compaction and curing of concrete. 

1 Answer

Answer :

Significance of Batching: 1. If the batching of materials required for concrete is not done appropriately, then random quantity of materials produce non-homogeneous concrete, which further leads to various difficulties in handling the concrete operations in terms of bad workability and poor strength. 2. There are more chances of wastage of concrete to produce good quality of concrete. 3. Un-batched materials results in various defects in concrete in later stages.

Significance of Compaction: 1. If compaction is not done then the concrete mass shows voids in it, resulting porous concrete. 2. Insufficient compaction results in honeycombing of concrete, hence it is important to get dense concrete 3. Compaction is significant to achieve desired strength and to ensure enhanced durability of concrete structure. 

Significance of Curing: 1. Curing plays vital role in completing the hydration of cement hence to achieve characteristic strength of concrete. 2. Curing is essential to gain early and ultimate strength of concrete. 3. Curing is necessary to make the concrete impermeable in nature its hardened state.

Related questions

Description : The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known (A) Grading (B) Curing (C) Mixing (D) Batching

Last Answer : (D) Batching

Description : The process of proper and accurate measurement of concrete ingredients for uniformity of proportion, is known as [ A ] Curing [ B ] Mixing [ C ] Grading [ D ] Batching

Last Answer : [ D ] Batching

Description : The produce impermeable concrete (A) Thorough mixing of concrete is required (B) Proper compaction of concrete is required (C) Proper curing of concrete is required (D) All the above

Last Answer : Answer: Option D

Description : The process of keeping concrete moist for a certain period after its finishing, is known as (A) Finishing of concrete (B) Curing of concrete (C) Placing of concrete (D) Compaction of concrete

Last Answer : Answer: Option B

Description : Pick up the correct statement from the following: (A) Plain cement concrete is equally strong in compression as well as in tension (B) Slump test is performed to check concrete strength (C ... D) Fineness modulus is the index number expressing the relative sizes of both coarse and fine aggregates

Last Answer : Option D

Description : The process of consolidating concrete mix after placing it in position is termed as. (a) Curing (b) Wetting (c) Compaction (d) All of these

Last Answer : (c) Compaction

Description : For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are: (A) 70 litres of sand and 120 litres of aggregates (B) 70 kg of sand and 140 litres of ... C) 105 litres of sand and 140 litres of aggregates (D) 105 litres of sand and 210 litres of aggregates

Last Answer : Answer: Option D

Description : The compaction of concrete, improves (A) Density (B) Strength (C) Durability (D) All the abov

Last Answer : (D) All the above

Description : Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor (Wp/Wf ) is 0.95, the workability of concrete is (A) Extremely low (B) Very low (C) Low (D) High

Last Answer : Option D

Description : Concrete is unsuitable for compaction by a vibrator if it is (A) Dry (B) Earth moist (C) Semi-plastic (D) Plastic

Last Answer : Answer: Option D

Description : Non-uniform compaction may cause the concrete (A) Porous (B) Non-homogeneous (C) Reduced strength (D) All the above

Last Answer : Answer: Option D

Description : The property of the ingredients to separate from each other while placing the concrete is called (A) Segregation (B) Compaction (C) Shrinkage (D) Bulking

Last Answer : Answer: Option A

Description : Workability of concrete mix with low water cement ratio is determined by (A) Tensile strength test (B) Slump test (C) Compaction factor test (D) Flexural strength test

Last Answer : Answer: Option C

Description : The compaction of concrete in the drilled pile hole is done by compressed air in the case of (A) Simplex pile (B) Franki pile (C) Pressure pile (D) Vibro pile

Last Answer : Answer: Option C

Description : The purpose of lateral ties in short R.C. columns is to (a) Increase the load carrying capacity of column (b) Facilitate compaction of concrete (c) Facilitate construction (d) Avoid buckling of longitudinal bars

Last Answer : (d) Avoid buckling of longitudinal bars

Description : The workability of concrete is expressed by (a) Water-cement ratio (b) Slump value (c) Compaction factor (d) Both (a) and (b)

Last Answer : (d) Both (a) and (b)

Description : The purpose of lateral ties in short reinforced concrete columns is to [ A ] Facilitate construction [ B ] Facilitate compaction of concrete [ C ] Increase the load carrying capacity of the columns [ D ] Avoid buckling of longitudinal bars

Last Answer : [ D ] Avoid buckling of longitudinal bars

Description : Workability of a concrete – mix is determined by (i)Slump cone test (ii)Compaction factor test (iii)Vee bee test [ A ] i [ B ] ii [ C ] i and ii [ D ] i, ii and iii

Last Answer : [ D ] i, ii and iii

Description : Workability of concrete mix with low water cement ratio is determined by [ A ] Tensile strength test [ B ] Slump cone test [ C ] Compaction factor test [ D ] Flexural strength test

Last Answer : [ C ] Compaction factor test

Description : While determining the workability of concrete mix, the compaction factor test is ------than the slump cone test [ A ] Less accurate [ B ] More accurate [ C ] Approximate method [ D ] None of the above

Last Answer : [ B ] More accurate

Description : Concrete is unsuitable for compaction by vibration if it is [ A ] Semi – plastic [ B ] Plastic [ C ] Earth moist [ D ] Dry

Last Answer : [ B ] Plastic

Description : For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is (A) 1 (B) 2 (C) 3 (D) 4

Last Answer : (A) 1

Description : Which one of the following represents an activity? (A) Excavation for foundation (B) Curing of concrete (C) Setting of question paper (D) All the above

Last Answer : (D) All the above

Description : Curing (A) Reduces the shrinkage of concrete (B) Preserves the properties of concrete (C) Prevents the loss of water by evaporation (D) All of the above

Last Answer : (D) All of the above

Description : Strength of concrete increases with (A) Increase in water-cement ratio (B) Increase in fineness of cement (C) Decrease in curing time (D) Decrease in size of aggregate

Last Answer : (B) Increase in fineness of cement

Description : The process of hardening the concrete by keeping its surface moist is known (A) Placing (B) Wetting (C) Curing (D) Compacting

Last Answer : Answer: Option C

Description : For providing a raft foundation, the following activities are involved 1. Ramming the foundation bed 2. Excavation of the soil upto required depth 3. Laying the reinforcement over the foundation bed 4. Curing the cement concrete placed over ... 2, 1 (C) 2, 1, 3, 5, 4 (D) 3, 2, 5, 1, 4

Last Answer : Answer: Option C

Description : Modulus of elasticity of concrete is increased with (a) Higher W/C ratio (b) Shorter curing period (c) Lesser vibration (d) Increase in age

Last Answer : (d) Increase in age

Description : The object of curing is to (a) Prevent the loss of water by evaporation. (b) Reduce the shrinkage of concrete (c) Preserve the properties of concrete (d) All of these

Last Answer : (d) All of these

Description : Blast furnace slag cement concrete requires ___________time for shuttering and curing. (a) Less (b) More (c) Medium (d) All the above

Last Answer : (b) More

Description : For Ordinary Portland cement concrete exposed to dry and hot weather conditions, good moist curing period is [ A ] 7 days [ B ] 10 days [ C ] 14 days [ D ] None of the above

Last Answer : [ B ] 10 days

Description : Modulus of elasticity of concrete is primarily influenced by [ A ] Elastic properties of aggregate [ B ] Curing of concrete [ C ] Age of concrete [ D ] Mix proportion and type of cement

Last Answer : [ A ] Elastic properties of aggregate

Description : At 28 days of curing concrete attains a strength of [ A ] 20 to 25% [ B ] 60 to 70% [ C ] 65 to 80% [ D ] 90 to 95%

Last Answer : [ D ] 90 to 95%

Description : The process of conversion of plastic concrete to solid stage is called [ A ] Hydration [ B ] Hardening [ C ] Setting [ D ] Curing

Last Answer : [ C ] Setting

Description : The process of keeping the concrete structure moist is called [ A ] Hydration [ B ] Curing [ C ] Creep [ D ] Shrinkage

Last Answer : [ B ] Curing

Description : The process of hardening of concrete in the presence of water is called [ A ] Creep [ B ] Hydration [ C ] Shrinkage [ D ] Curing

Last Answer : [ B ] Hydration

Description : Describe Briefly The Various Methods Of Concrete Curing?

Last Answer : Answer : Curing is the process of maintaining the moisture and temperature conditions for freshly deployed concrete. This is done for small duration of time to allow the hardening of concrete. The methods that ... can be applied on curing surface. This keeps the surface wet for a very long time.

Description : Classify the methods of curing of concrete with detail explanation of any one method.

Last Answer : Methods of curing: A. Water curing B. Membrane curing C. Application of heat D. Miscellaneous methods 1. Water curing: i) This is the best method of curing, because it satisfies all ... the surface prevents the mixed water from evaporation and thereby keeps the concrete wet for a long time. 

Description : Batching refers to (A) Controlling the total quantity at each batch (B) Weighing accurately, the quantity of each material for a job before mixing (C) Controlling the quantity of each material ... be added in each batch according to the moisture content of the materials being mixed in the batch

Last Answer : (C) Controlling the quantity of each material into each batch

Description : Proper batching ensures (A) Economy (B) Durability (C) Workability (D) All the above

Last Answer : (D) All the above

Description : Batching error means inaccuracy in the quantity of (A) Aggregates (B) Cement (C) Water (D) All the above

Last Answer : Option D

Description : Steam Boilers is used in _________industries • Heating Requirement for Facility. • Steam for Batching. • Steam for Processing. • All of the above

Last Answer : • All of the above

Description : Where are steam boilers used in the industries a) heating requirement for facility b) steam for batching c) steam for processing d) all of the above

Last Answer : d) all of the above

Description : Explain the significance of water reducing admixture in concrete with respect to properties of concrete.

Last Answer : Significance of water reducing admixture in concrete: Water reducing admixtures are essential for several purposes. The effect of using such admixtures on concrete properties is described below. 1. Water ... strength. 7. The durability of concrete structures can be ensured by using these admixtures.

Description : Explain different methods of field compaction of soil.

Last Answer : Methods of field compaction of soil i) Rolling- In this method, soil is compacted by using 6-8 tonne heavy rollers. The rollers are selected as per type of soil. Due to ... compactors. Vibrations of large amplitude, rearrange the soil particles together and hence overall compaction takes place.

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.  

Description : State field methods of compactions. Explain suitability of various compaction equipments. 

Last Answer : Field methods of compactions: 1. Compaction by rolling 2. Compaction by ramming 3. Compaction by tamping 4. Compaction by vibration Suitability of various compaction equipments. 1. Smooth ... both flexible and rigid pavement. It is also suitable for compacting granular soils with no fines.

Description : Soil compaction __________ yield of potato. a. Increases b. Decreases c. Does not effect d. Unknown

Last Answer : Decreases

Description : An instrument used to measure soil compaction is: a Hydrometer b Cone penetrometer c Tachometer d Hygrometer

Last Answer : b Cone penetrometer

Description : DNA compaction involves a. A Twisting And Packing Of The DNA. b. Supercoiling. c. The Formation Of Looped Domains. d. All The Above (A—C) Are Correct.

Last Answer : d. All The Above (A—C) Are Correct.