Basic Civil Engineering Questions and Answers
What is the bending moment (BM) & Shear force (SF) – Explain.
bending moment refers to the internal rotational moments that cause a section to bend. While Shear force refers to the force acting along on a surface which is opposite and equal to the resultant force.
What are the steps involved in the concreting process, explain?
The major steps involved in the process of concreting are as follows: 1. Batching 2. Mixing 3. Transporting and placing of concrete 4. Compacting
Describe briefly the various methods of concrete curing.
There are three basic ways of curing concrete. The first - involves keeping the surface of the concrete moist by the use ponding, spraying/sprinkling, damp sand or damp hessian. The second prevents the loss of moisture from the concrete by covering it with polythene sheeting or leaving the formwork in place
What is the minimum curing period?
Allow Proper Time to Water Cure. After concrete is placed, the concrete increases in strength very quickly for a period of 3-7 days. Concrete which is moist cured for 7 days is about 50% stronger than uncured concrete
What Do You Understand by M25 Concrete?
strength of concrete cube of 150mm x150mm x150mm tested at. the end of 28 days should be minimum 25 N/Sq.mm.
What is Water-Cement Ratio and How it is related to the strength of concrete?
The water cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix and has an important influence on the quality of concrete produced. A lower water-cement ratio leads to higher strength and durability but may make the mix more difficult to place.
What is a bearing capacity of soil?
Ans. In geotechnical engineering, bearing capacity is the capacity of soil to support the loads applied to the ground. ... Ultimate bearing capacity is the theoretical maximum pressure which can be supported without failure; allowable bearing capacity is the ultimate bearing capacity divided by a factor of safety.
How to increase the bearing capacity of soil?
Increasing depth of foundation.
Draining the soil.
Compacting the soil.
Confining the soil.
Replacing the poor soil.
Using grouting material.
Stabilizing the soil with chemicals.
What are the different types of foundation?
Shallow foundations (sometimes called 'spread footings') include pads ('isolated footings'), strip footings and rafts. Deep foundations include piles, pile walls, diaphragm walls and caissons.
Explain moment of inertia and its importance.
The moment of inertia depends on how mass is distributed around an axis of rotation, and will vary depending on the chosen axis
How do we determine the specific gravity of a cement?
By Le Chatelier method.
Density Of 1 cum cement?
Density of cement is 1440 kg/cum and 1 bag contains 50 kg of cement
What are the causes of the building collapse?
There are several reasons which have been advanced to explain why buildings collapse. Most buildings collapse mainly because of structural failure. ... The dead or permanent load is load of the building elements themselves like the weight of the walls, roofs and permanent partition floors.
What is bar bending schedule (BBS) & how to prepare it?
Bar Bending Schedule, commonly referred to as “BBS” is a comprehensive list that describes the location, mark, type, size, length and number, and bending details of each bar or fabric in a Reinforcement Drawing of a Structure.
Why is concrete cube test carried out?
Concrete cube test is carried out for finding out the Characteristic Compressive strength of Concrete.
What is the bending moment (BM) & Shear force (SF) – Explain.
bending moment refers to the internal rotational moments that cause a section to bend. While Shear force refers to the force acting along on a surface which is opposite and equal to the resultant force.
What are the steps involved in the concreting process, explain?
The major steps involved in the process of concreting are as follows: 1. Batching 2. Mixing 3. Transporting and placing of concrete 4. Compacting
Describe briefly the various methods of concrete curing.
There are three basic ways of curing concrete. The first - involves keeping the surface of the concrete moist by the use ponding, spraying/sprinkling, damp sand or damp hessian. The second prevents the loss of moisture from the concrete by covering it with polythene sheeting or leaving the formwork in place
What is the minimum curing period?
Allow Proper Time to Water Cure. After concrete is placed, the concrete increases in strength very quickly for a period of 3-7 days. Concrete which is moist cured for 7 days is about 50% stronger than uncured concrete
What Do You Understand by M25 Concrete?
strength of concrete cube of 150mm x150mm x150mm tested at. the end of 28 days should be minimum 25 N/Sq.mm.
What is Water-Cement Ratio and How it is related to the strength of concrete?
The water cement ratio is the ratio of the weight of water to the weight of cement used in a concrete mix and has an important influence on the quality of concrete produced. A lower water-cement ratio leads to higher strength and durability but may make the mix more difficult to place.
What is a bearing capacity of soil?
Ans. In geotechnical engineering, bearing capacity is the capacity of soil to support the loads applied to the ground. ... Ultimate bearing capacity is the theoretical maximum pressure which can be supported without failure; allowable bearing capacity is the ultimate bearing capacity divided by a factor of safety.
How to increase the bearing capacity of soil?
Increasing depth of foundation.
Draining the soil.
Compacting the soil.
Confining the soil.
Replacing the poor soil.
Using grouting material.
Stabilizing the soil with chemicals.
What are the different types of foundation?
Shallow foundations (sometimes called 'spread footings') include pads ('isolated footings'), strip footings and rafts. Deep foundations include piles, pile walls, diaphragm walls and caissons.
Explain moment of inertia and its importance.
The moment of inertia depends on how mass is distributed around an axis of rotation, and will vary depending on the chosen axis
How do we determine the specific gravity of a cement?
By Le Chatelier method.
Density Of 1 cum cement?
Density of cement is 1440 kg/cum and 1 bag contains 50 kg of cement
What are the causes of the building collapse?
There are several reasons which have been advanced to explain why buildings collapse. Most buildings collapse mainly because of structural failure. ... The dead or permanent load is load of the building elements themselves like the weight of the walls, roofs and permanent partition floors.
What is bar bending schedule (BBS) & how to prepare it?
Bar Bending Schedule, commonly referred to as “BBS” is a comprehensive list that describes the location, mark, type, size, length and number, and bending details of each bar or fabric in a Reinforcement Drawing of a Structure.
Why is concrete cube test carried out?
Concrete cube test is carried out for finding out the Characteristic Compressive strength of Concrete.
