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fathima
fathima

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How to repair Honeycombs in Column?

  1. AdityaBhandakkar

    AdityaBhandakkar

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    AdityaBhandakkar User
    How to repair Honeycombs in Column?

    Causes of honeycombing in the column: Improper mixing ratio Vibrating not done properly Use of excessive stiff concrete. Use of figure size of aggregate in concrete during mixing. Curing not done properly Following are the remedies of honeycombing in the column: the spacing of reinforcement should bRead more

    Causes of honeycombing in the column:

    1. Improper mixing ratio
    2. Vibrating not done properly
    3. Use of excessive stiff concrete.
    4. Use of figure size of aggregate in concrete during mixing.
    5. Curing not done properly

    Following are the remedies of honeycombing in the column:

    1. the spacing of reinforcement should be maintained properly so that the vibrating needle goes middle in of the column and operating properly. If the spacing of reinforcement and stirrups is less, this illustrates the vibrating operations.
    2. In a column, strictly use of less than 20 mm aggregate used to reduce honeycombing defects.
    3. Tapping the shuttering with the help of wooden hammer during concreting this helps for minimising the honeycomb being up to great extent.
    4. Use of a thinner needle, it may be less than 25 mm. This allows vibrating at in very less space in the column.

    Hope this helps.

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Seshachalam Chamarthy
Seshachalam Chamarthy

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Dear All, What is the difference between Additional works and Extra works?

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare

    Assume one work is awarded to a contractor on item rate basis. During the execution of work, the necessity arises to do some works which are not given in the contract, but the contractor has been requested to carry out such works and payment will be made after supplemental rates and agreement are exRead more

    Assume one work is awarded to a contractor on item rate basis. During the execution of work, the necessity arises to do some works which are not given in the contract, but the contractor has been requested to carry out such works and payment will be made after supplemental rates and agreement are executed

    This is extra. work

    Example Providing stainless steel handrails instead of aluminum handrails

    Here extra work is provision of stainless steel handrails

    During the execution of foundation work, the quantity given in the agreement is exceeding due to actual type of soil

    Here additional quantity of earthwork, filling, RR work will be coming which are needed

    Usually in the agreement itself it will be mentioned that the rates are applicable up to 5% more or less besides quantity

    Here the additional work comes.

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Gopal Mishra
Gopal Mishra

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What are the main differences between masonry and timber buildings? What are their benefits in aspects such as durability, insulation, construction, etc.?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    Masonry building : Masonry is the building of structures from individual units, which are often laid in and bound together by mortar. The term masonry can also refer to the units themselves. For masonry construction, the common materials are brick, building stones,etc. Masonry is highly durable formRead more

    Masonry building :

    Masonry is the building of structures from individual units, which are often laid in and bound together by mortar. The term masonry can also refer to the units themselves. For masonry construction, the common materials are brick, building stones,etc. Masonry is highly durable form of construction.

    Benefits of Masonry Buildings :

    • Fire protection ; Fire protection benefits of concrete masonry are recognised by the Fire service and insurance industry. The extra ability to resist fire comes from the types of aggregates used and the equivalent solid thickness of the masonry units.
    • Sound Control ; Masonry is an ideal sound barrier, providing reduced sound transmission relative to the size of the wall.
    • Structural durability ; Masonry construction provides solidity, permanence and a real sense of substance.
    • Energy efficiency ; The main benefit of masonry construction is the cost setting derived from its capacity to store energy and to delay the passage of heat.

    Timber Buildings ;

    Timber construction is a category of framing styles typically characterized by the use of large solid wood panels for wall, floor and roof constrution. It also includes innovative forms of sculptural buildings and non-building structures formed from solid wood panel or framing system.

    Benefits of Timber Buildings ;

    • Low embodied energy if constructed in local timber.
    • Quick build time.
    • Reduced time to weather the structure.
    • It can be built to exceed 60 year design life.
    • Low volume of waste on site requiring removal.
    • Durable and easy to maintain.

     

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Asked: In:
Gopal Mishra
Gopal Mishra

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A double layer HDPE liner shall be installed in an oily water evaporation Pond with Leak Detection. The size of the pond is 70m by 70m

  1. Omprakash Dhawale

    Omprakash Dhawale

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    Omprakash Dhawale Beginner
    This answer was edited.

    Sir, HDPE liner was choosen to protect the surface and groung waters of the area and to assist with the evaporation of the water. This liner is also known as the HDPE goe-membrane. It contains 98% high density polyethylene. It is durable and long lasting and are used to line cooling ponds due to theRead more

    Sir,

    HDPE liner was choosen to protect the surface and groung waters of the area and to assist with the evaporation of the water.

    This liner is also known as the HDPE goe-membrane. It contains 98% high density polyethylene.

    It is durable and long lasting and are used to line cooling ponds due to their low permeability and resistance to UV light.  

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Asked: In:
Gopal Mishra
Gopal Mishra

Gopal Mishra

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I want to know the new practices in the field of planning, execution, quality in the construction sector.

  1. aviratdhodare

    aviratdhodare

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    aviratdhodare

    It has been seen that it is very difficult to adopt any new innovations in Construction Industry especially in India. When we talk about Construction of Residential Buildings it has been observed that the the variation in cost could be matter a lot. When final estimation sanctioned and at the time oRead more

    It has been seen that it is very difficult to adopt any new innovations in Construction Industry especially in India.

    When we talk about Construction of Residential Buildings it has been observed that the the variation in cost could be matter a lot. When final estimation sanctioned and at the time of execution it seen that 3 factors affect this capital :

    1. MATERIAL ( Variation of cost would be 55 to 65%)
    2. MANPOWER ( Variation of cost would be 25 to 35%)
    3. EQUIPMENT ( Variation of cost would be 10 to 15%)

    Note: Above is the condition in case of Residential Buildings only.

    This suggests that every project needs a Good Decision.

    Suppose, if you have :

    1. Sufficient Captial for Project.
    2. Sufficient Space for equipments etc.
    3. But there is Time constraints.

    Now the Question is what method of formwork Do You Use? To complete your project.

    Now a days less number of companies Using Mivan Formwork. It comes from Malaysian Company.

    Is this Case we can use this method. This is method you can cast one floor at a time as single unit. Less thickness of Concrete wall made that increases the carpet area. It is made of Aluminum so obviously it is less weight and easy to handle and in this method there is no wastage of materials, this formwork made a air tight casement so no league of concrete is possible.

    So, what i thought, in India, near in 2 to 3 years every company will adopt this technique.

    Edit 1: Someone are thinking that it a Old technique. My simple Question is that Is there any company in India presently using Robotic Technology or Nano Technology ? As both are invented before independence only. Just read my first sentence of this answer and comment accordingly.

    Edit 2: Just think Which formwork is best and why? If you have 3 options Timber Formwork, Steel Formwork and Aluminum Formwork. Now, when i said Aluminum Formwork, so is it that Aluminum Formwork is nothing but Mivan Formwork?

    Note: Every Mivan is a Aluminum formwork but every Aluminum Formwork is not Mivan.

    Right from Rotating towers (Dynamic tower-Bubai) to self reparing roads (in a villageIndia-Developed by ) Hyperloop there are many innovations coming up day by day.

    As many friends have discussed few topics above. I would like to share what latest technologies / innovations being implemented in my surroundings.

    As a part of Junctions development few grade seperateors are proposed in Hyderabad city.

    Construction methodology followed at one of the locations is first of its kind in Hyderabad .

    Only the foundations are cast-in-suit and rest all are brought – placed & pre stressed in stages for speed up in construction .

    At few other places steel piers and girders are proposed.

    => Precast building construction is growing up rapidly.

    => Box pushing methods for underpass / RUB

    construction .

    => Aerocon ACC blocks -super strong & light weight for fast and easy construction used by many developers.

    These are few things on construction side.

    Coming to software’s with latest technologies/Innovations in Civil 3D …etc..

    All the designs i.e. alignment design , structure design etc…can be done in one go as per exactly integration with Google maps.

    What ever latest technologies/innovations came or coming. Olden techniques are always mind grabbing and beyond the imaginations.

    Civil engineering rocks…

    1. New Emergent Materials. These materials can be “grown” as opposed to built. They posses properties that react to certain to certain conditions that make them change. While some of these are still in very early development and others not yet in production, when they do become available, how will our industry change when a structure can grow itself with pre programmed instructions for perfect engineering.

    2. Generative Design- the ability of a computer to create an architectural or engineering design without Human Intervention. Its “fed” data from 1000s of previous design projects and uses that to optomize and create “its” own.

    3. Laser Scanning Point Clouds- A laser or a multiple photographs is used to create a 3D mapp of a structure or surface. This blows away traditional surveying.

    4. 3D Printing- Additive Manufacturing that produces products by extruding material layer by layer. Entire buildings have been produced this way.

    5. Robotic Prefabrication- Robots enable the production of a structures parts in pieces within controlled enviorment factories. Components are produced and assembled and than delivered on the sight for drop in place finish. This dramatically reduces labor and schedule.

    • Building Information Modelling (BIM)
    • Cloud And Mobile Technology
    • Drones Or Unmanned Aerial Vehicles (UAVs)
    • Virtual Reality
    • Augmented Reality
    • 3D Printing
    • Artificial Intelligence
    • Robotics
    • Exoskeletons
    • The Connected Jobsite
    • Autonomous Vehicles
    • Advanced Materials
    • The Intelligent Built Environment
    • Machine Learning
    • Prefabrications
    • Predictive Analytics
    • Construction Software And Data Ecosystem
    • Self Healing Concrete
    • Advance Uses Of GPS
    • New Effective Scanning Solutions
    • Timber Constructions
    • Wearable Technology
    • Smart Building
    • Modular Construction And 3D Printed Dwellings
    • Smart Buildings
    • Connected Homes
    • Home Analytics
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Asked: In:
amr soliman
amr soliman

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what is the importance of expansion joints on concrete bridge decks?

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    The importance of expansion joints on concrete bridge deck is that they are designed to allow for continuous traffic between structures while accommodating movement, shrinkage and temperature variations on reinforced and prestressed concrete, composite and steel structures.

    The importance of expansion joints on concrete bridge deck is that they are designed to allow for continuous traffic between structures while accommodating movement, shrinkage and temperature variations on reinforced and prestressed concrete, composite and steel structures.

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DevilAVRT
DevilAVRT

DevilAVRT

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Beginner

What is the object of pointing? Describe the operation of pointing.

  1. nikeetasharma

    nikeetasharma

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    nikeetasharma Guru

    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 :-
    1. 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.

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