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What is Crazing Crack in Plaster?
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Crazing crack is a network of fine cracks, usually in a hexagonal pattern, which measure between 5 and 75mm across each hexagon. Crazing often occurs within a few hours of the plaster being applied to the wall and cracks may hardly be visible until dust or moisture makes them noticeable.
Crazing crack is a network of fine cracks, usually in a hexagonal pattern, which measure between 5 and 75mm across each hexagon. Crazing often occurs within a few hours of the plaster being applied to the wall and cracks may hardly be visible until dust or moisture makes them noticeable.
See lessWhy water is not used to find specific gravity of cement?
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Specific gravity of any material is defined as the ratio of weight of a volume of a material to the weight of same volume of water at particular temperature. So in this test the quantities are very important. Water is not used in testing of specific gravity of cement because cement reacts with waterRead more
Specific gravity of any material is defined as the ratio of weight of a volume of a material to the weight of same volume of water at particular temperature. So in this test the quantities are very important. Water is not used in testing of specific gravity of cement because cement reacts with water and form compounds. Thus , the quantities measured prior to the commencement of test will not be same after the test. Therefore kerosene which is inert (non-reactive) with cement is used. We should observe here that we calculate the specific gravity of cement with respect to kerosene and convert it with respect to water by using 0.79 (specific gravity of kerosene) in the formula of the same.
See lessWhat is membrane curing of concrete?
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Membrane curing of concrete is a method of curing a concrete usually in pavements by which a material in liquid form is sprayed over the exposed surface shortly after the concrete is finished after which the material solidifies and becomes essentially impervious and thus hold the mixing water in theRead more
Membrane curing of concrete is a method of curing a concrete usually in pavements by which a material in liquid form is sprayed over the exposed surface shortly after the concrete is finished after which the material solidifies and becomes essentially impervious and thus hold the mixing water in the concrete so that it can hydrate the cement over a period of time.
See lessWhat is the object of pointing? Describe the operation of pointing.
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Pointing :- It is the art of finishing the mortar joints in the exposed brick or stone masonry with suitable cement or lime mortar, in order to protect the joints from weather effects and also to improve the appearance of building structure. Pointing is a type of front of the house exposed finish onRead more
Pointing :- It is the art of finishing the mortar joints in the exposed brick or stone masonry with suitable cement or lime mortar, in order to protect the joints from weather effects and also to improve the appearance of building structure. Pointing is a type of front of the house exposed finish on masonry work.
Object of pointing :- The main object of the pointing is to maintaining the joints of the structures. Pointing being cheap can be adopted in places of low rainfall. Pointing gives resisting power to the bricks and stones used in construction towards weather conditions.
Operation of pointing :-
See less1. All the mortar joints (on the masonry face required to be pointed) are raked out by a special pointing tool to a depth of 15 to 20 mm, so as to provide an adequate key for the fresh mortar used for pointing.
2. All the loose mortar and dust are removed by brushes.
3. The joints and wall surface are washed with clean water, and then kept wet for few hours. The joints so prepared, are filled with suitable mortar with a small trowel.
4. The mortar is well presses into the joints to form a close contact with the old interior mortar joints and all excess mortar sticking to the sides are scraped away.
5. The finished pointing work is kept wet for about 3 days when lime mortar is used for pointing and for 10 days when cement mortar is used for pointing.
What is the diffrence between lap length and development length?
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lap length is required when bars placed short of their required length (due to nonavailability of longer bars) need to be extended. lap length is to be provided to safely transfer the load. Development length is provided to transfer the load from steel to concrete. It is also known as anchorage lengRead more
lap length is required when bars placed short of their required length (due to nonavailability of longer bars) need to be extended. lap length is to be provided to safely transfer the load.
Development length is provided to transfer the load from steel to concrete. It is also known as anchorage length.
See lessDifference between map and plan?
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The difference between MAP & PLAN are as follows ; MAP : Generally, MAP is said to be a visual representation of an area. It can also be said as a symbolic depiction highlighting relationships between elements of that space such as objects, regions, and themes. Map contains a lot of information.Read more
The difference between MAP & PLAN are as follows ;
MAP : Generally, MAP is said to be a visual representation of an area. It can also be said as a symbolic depiction highlighting relationships between elements of that space such as objects, regions, and themes. Map contains a lot of information. It shows only the important features of the area.
PLAN : PLAN are a set of two-dimensional diagrams or drawings used to describe a place or an object, or to communicate building or fabrication instructions. In plan details are given in form of symbols. Thus, it can show both length and breadth.
See lessWhere rafters are used? What is the purpose of it?
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Rafter is a structural component that is used as a part of a roof construction. Though typically it runs from the ridge or hip of the roof to the wall plate of external wall. Generally, rafters are laid in series, side by side, providing a base to support, roof decks, roof covering, etc. Rafters areRead more
Rafter is a structural component that is used as a part of a roof construction. Though typically it runs from the ridge or hip of the roof to the wall plate of external wall. Generally, rafters are laid in series, side by side, providing a base to support, roof decks, roof covering, etc. Rafters are designed to support the roof deck and its associated loads.
See lessBest laptop for a civil engineer?
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Civil engineering students should buy a laptop that provides the specific configurations which are required for civil engineering programs, softwares and applications. The laptop should have 4GB to 6GB RAM because advanced programming activities may require higher RAM. Students should choose the lapRead more
Civil engineering students should buy a laptop that provides the specific configurations which are required for civil engineering programs, softwares and applications. The laptop should have 4GB to 6GB RAM because advanced programming activities may require higher RAM. Students should choose the laptop which must allow upgrading for the best performance. The laptop should not be heavy because they need to carry it to many places. It should contain good quality display and sharpness. Laptop must be gaming laptop because it will be best to choose a laptop which provides the speed and configurations for playing games on laptop.
Some of the best laptop for civil engineers are mentioned below;