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Civil Engineering Information

Construction & Management of Underground Structure with Scheduling & Estimation

By
Mr. S.L. Ghorpade
Under the guidance of Prof. A.B. Shendge
Dattakala Group of Institutions Faculty of Engineering, Swami – Chincholi (Bhigwan).

Abstract- The construction of tunnel is important for different purposes. They can be constructed for railways, roadways, pedestrian footways and can be built in hard rock, soft ground, river bed and are also used to convey Hydroelectric power, water stream, or as a sewer. The construction of Diversion Tunnel, Pressure Shaft, and Tailrace Tunnel to convey water is considered in this project. To identify Scheduling of different activities by various methods Network Diagram, C.P.M., P.E.R.T. and their cycle time is calculated. Scheduling for different activity is carried out with the help of Network Diagram & Primavera Software will be carried out in a project stage II. Study of Estimation for a Diversion Tunnel, Pressure Shaft, and Tailrace Tunnel by both methods. Excavation in heading and benching, Rock bolt support work, lining work is considered for cycle time and cost estimation calculation in Diversion Tunnel, Pressure Shaft, and Tailrace Tunnel. Estimation is also carried out by two methods. The comparison of two methods adopted for excavation work and estimation will be carried out in a project stage II.

Keywords- Scheduling, C.P.M., P.E.R.T., Gantt chart, Network Diagram, Estimation, Heading, Benching, Cycle time, Lining, Rock Bolts, Diversion Tunnel, Pressure Shaft, Tailrace Tunnel.

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Types of CAD Softwares used by Civil Engineers

Introduction
Computer-Aided Design Software or CAD is used to create, analyze, modify, or stimulate for optimizing design. Architects, engineers, and designers use it to create or modify designs in 2D or 3D that was impossible to be exhibited on paper. It transforms designs into codes that are understandable by the computer, resulting in viewing a designed object from various perspectives.

Different companies use different CAD software versions to carry out desired results for the company’s standards. CAD offers expandable features that can be used by companies working in various fields. This software facilitates conversion from design to construction process. Because of low-cost development and less time consumption, this software is gaining traction. Some of such software that is used in various industries shall be discussed here in details.
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What is Asphalt Flooring? Its Uses, Preparation and Installation

Introduction:
Asphalt is petroleum liquid with a very high viscosity. In many settings, asphalt flooring is the best solution. Asphalt mastic is created by mixing asphalt and sand in a 2:1 ratio when used as a flooring layer over a concrete subfloor. In place of sand, asphalt can be used to create a marble mosaic. Aside from asphalt, inert chemicals and mineral pigments are used to create asphalt tiles.

Asphalt flooring
Fig: Asphalt flooring
Courtesy: designingbuildings.co.uk

What is Asphalt Flooring?
The components of asphalt flooring are asphalt, chrysotile, paint, and glass beads, resulting in a smooth coating. It has a flat profile of around 1/8 to 3/16 inches and is indestructible, flame-resistant, cheap, and simple to shape. This flooring is well-known for its attractive appearance, as well as its anti-slip and soundproof properties, as well as its resistance to water, dirt, grease, acid, and dirtiness.
Asphalt flooring expands when wet, even when minimal maintenance requirements are followed; linoleum, on the other hand, can be installed in a quarter of the time and is resistant to viruses, acids, oils, and animal fats. Its use becomes appropriate for the ground temperature to be below 27 degrees Celsius.

Where is Asphalt Flooring Used?
Asphalt flooring can be seen in various settings, including parking lots, flyovers, footbridges, and verandas. On an existing concrete slab, its installation time is drastically reduced. It’s a smart idea to widen passageways like patios and bridges. As a result of its toughness and longevity, asphalt flooring is widely favored across the globe. The garage, the flyover, the walkway, and the runways are just a few places where asphalt flooring may be useful.

Preparation and Installation of Asphalt Flooring:

  • Clean the old floor and remove any cement, sand, or other debris before installing it. Massive equipment is required to break up the old asphalt. All debris from demolition must be removed, and the area must be thoroughly cleaned before the installation can begin. Additionally, cut up the smaller trees and grasses. More tanks in the space between buildings are wasteful and may lead to complications.
  • Make sure the water drains correctly by setting the lean after cleaning. If the concrete is poured properly, it will delay the collapse of your floors. Water can pool at the edge of the floor because of the design.
  • A well-installed sub-base is crucial since it serves as the flooring’s central support system and provides a stable foundation. The sub-base serves as an ice bridge in cold weather, minimizing fissures created by the time-consuming thawing process.
  • It is time to proof roll once the sub-base has hardened and been compacted. The stability of the basic pattern, essential for the asphalt and the load, is ensured by proof rolling.
  • Layer in your folder structure. The smooth zone of the base and the sub-base must be located before you can set your folder base. Finally, install the new asphalt flooring once a binder coating has been applied. When properly assembled, the sand, oil, and microscopic particles that give it its black appearance can be transformed into a soft, brilliant, and endearing floor.
  • Your new asphalt joints for pavement, highway, and parking space are the last touch because you’ll need to transition between the two configurations seamlessly.

Repairs to Asphalt Flooring:
Mastic asphalt flooring is convenient because it doesn’t have to be completely removed if damage occurs. Identifying the damaged section of an asphalt floor is the first step in repairing the damaged section. As a next step, the asphalt will be pliable again by applying a “hot poultice” around the circumference of the damaged region. The maintenance worker will use a bolster and hammer to break up the asphalt before shoveling it away.

The exposed edge is cleaned for a broken joint, and heating felt or staple tissue is applied. Depending on the desired thickness, the flooring is layered with asphalt in one or two layers.
Then, the asphalt is recreated and reheated to produce a fusion joint with the rest of the mastic asphalt. As a final step, coarse sand is rubbed into the asphalt, allowing the material to cool.

Advantages of Asphalt Flooring:

  • Placing the asphalt flooring catalog in a parking lot will result in a sturdy and long-lasting plane, which will be evaluated for its strength and durability.
  • Pavement made of asphalt will have bitumen applied to make it even more watertight.
  • Particles are less likely to stick to asphalt flooring than concrete because of the material’s structure.
  • Asphalt flooring bases can help smooth out imperfections like sharp corners and edges that would otherwise damage your floor.
  • With asphalt, materials may be revived and used again because it does not degrade.
  • Asphalt walkways on balconies are a terrific choice for a practical and long-lasting floor.
  • Healing with asphalt is rational and straightforward; if you administer asphalt, you will need less supervision.

Disadvantages of Asphalt Flooring:

  • Asphalt flooring requires more maintenance than concrete since it must be sealed every four to five years with plaster to keep it from cracking. There will be instances when flying isn’t necessary.
  • For the best results, heat the material to between 250 and 350 degrees Fahrenheit before applying it to the asphalt floor of the airplane. Then, coat it with sand or other materials for added compression and longer service life.
  • Asphalt will deteriorate if you haven’t varied and positioned it properly, and you can repair and level off cracked or uneven surfaces before flooring.
  • In the future, asphalt will be made from fuel, which causes harm when the organic compound is removed—reverse asphalt, which can be used to build asphalt concrete with no organic compounds.
  • Asphalt flooring cannot be laid without a tracked truck and the right accessories.

Conclusion:
Asphalt flooring is becoming increasingly popular due to its numerous useful properties, such as toughness, elasticity, durability, water resistance, acid resistance, and aesthetic appeal. Since mastic asphalt flooring is both silent and nonslippery, it may be used anywhere from factories to loading platforms to swimming pools and terraces.

References:
1. “Mastic Asphalt Flooring.” Mastic Asphalt Flooring – Designing Buildings, www.designingbuildings.co.uk/wiki/Mastic_asphalt_flooring. Accessed 10 Nov. 2022..
2. Asphalt, Heritage. “Asphalt Contractors: Heritage Asphalt #1 UK Asphalt Company.” Mastic Asphalt Contractor, masticasphaltcontractor.co.uk. Accessed 10 Nov. 2022.
3. “What Is Asphalt Flooring: Its Advantages and Disadvantages.” Real Estate Forum by NoBroker.com, www.nobroker.in/forum/what-is-asphalt-flooring. Accessed 10 Nov. 2022.
4. “Mastic Asphalt Flooring | the Construction Civil.” The Construction Civil, 28 Sept. 2012, www.theconstructioncivil.org/mastic-asphalt-flooring.
5. Geeky. “Pros and Cons of Asphalt and Concrete | Richmond Blacktop.” Richmond Blacktop, 19 Aug. 2016, richmondblacktop.com/blog/pros-cons-asphalt-concrete.
6. Asphalt, London. “London Asphalt.” London Asphalt, www.asphaltroofinglondon.co.uk. Accessed 10 Nov. 2022.

Modern Day Methods Of Dealing With Cracks In Concrete

INTRODUCTION
Cracks in concrete are common and it if often misunderstood as not having done mixing properly or compaction properly or problem in foundation and many more. In general cases cracks sizes ranging from 1/4 inch to 1/16 inch is considered to be acceptable limit. One can control cracking by properly preparing the subbase, proper curing, not favouring under-reinforcement or over-reinforcement, by proper placing and spacing crack control joints, etc. To fix narrow cracks in concrete, caulk-style concrete repair compound is used because of its easy application. For larger cracks especially in case of walls, epoxy injection kit is used which allows deep penetration through cracks. In case of repairing of stairs, vinyl concrete patcher is used as it is durable and easy to mould into a step like shape.

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What is Concrete Bonding Agent? Explain its Types and Uses

Introduction:
Concrete is a building material made of cement, aggregates (rock and sand), water, and additives (chemicals that enhance or modify the properties of concrete). There are a lot of chemicals used in construction now. From concrete admixtures to sealants, grouts, bonding agents, and waterproofing chemicals, the construction chemicals industry has a wide range of products. The construction industry uses these chemicals in a lot of different ways. These construction chemicals can make concrete stronger, and when used in different ways and amounts, they can also help get around many other problems. One chemical that is used in concrete is a “bonding agent.” This article will discuss concrete bonding agents and different types of concrete bonding agents.

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What is the Gradient of the Road and Types of Gradient of Road

Introduction:
The gradient of a road is crucial to the road’s very existence. The topography of most areas is not flat. Slopes are common on things that vary in scale. If a road were built there, there would likely be accidents. Road slopes facilitate these height fluctuations, which allow for smooth vehicle travel.

Different Types of Gradient of Roads
Fig: Different Types of Gradient of Roads
Courtesy: constructioncost.co

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What is Shoring in Construction?

Introduction:
Construction workers must use various shoring methods when working on excavations or building sites to keep a building from falling over. Shoring may help professionals meet safety standards and prevent accidents from happening while digging and building. Shoring is building temporary structures to support unstable structures in the short term. These hold up the side walls. When walls buckle, when walls crack because foundations sink unevenly, or when cracked walls need to be fixed, shoring is needed to take down nearby buildings if a hole in the wall needs to be fixed or made bigger.

What is Shoring:
Shoring is temporary side support used in construction, repairs, and excavations. It can be used when walls bulge out, when walls crack because of uneven foundation settlement and need to be fixed, when an adjacent structure needs to be torn down, or when new holes or openings need to be made in walls. In construction, shoring is needed to support a deep excavation so that the retained soil doesn’t topple over and cause a mistake on the project. Its support depends on the soil type and the difference in an excavation level at least 1.20 meters from ground level.

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Latest Innovative Construction Materials

Introduction:
Over the years, people in construction projects have always thought of new ways to do things. From the strong concrete used in old buildings to the steel used in bridges and skyscrapers, we can see how technology has changed the building industry. Some things change over time, while others are brand new. People had to develop new and creative ideas to keep up with the need for housing, natural disasters, and rising construction costs. This article will talk about some new, innovative building materials.

What is Innovation in Construction?
Regarding building materials, innovation means improving their quality and properties. The old material can be changed while its useful properties stay the same, or a new material can be used instead. Improving the building’s processes, products, or services is also a part of being innovative with building materials.

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Parapet Wall – Applications and Types

Introduction:
The parapet wall is a crucial structural element of our home. When completed, it forms a protective barrier at the end of the roof of the building or balcony. The parapet wall is crucial to the security of the building’s inhabitants. A parapet is usually the top part of a wall that goes over the roof and protects the roof, gutters, balconies, and walkways of houses, churches, castles, apartment buildings, commercial buildings, and other types of buildings. It could be made of bricks, stones, concrete, wood, or glass. A parapet can also stop a fire from spreading to a roof and protect against a sudden fall that could be fatal.

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Foundation Settlement – Causes, Types and Preventive Measures

Introduction:
The lowest level of a building is its base, also called its foundation. So, the structure’s load (or loads) can be safely transferred to the ground below. The stability of a building’s foundation is one of the most important parts of how well it works. A good foundation ensures the ground is kept from what it can handle. Even though it can, the ground sinks under the weight. The amount of the settlement is in a good range.

Additionally, many factors, such as soil type and how the foundation is constructed, can affect the total amount of foundation settlement. Foundations built on bedrock move very little. On the other hand, foundations in other kinds of soil, like clay, may sink much more. Since it was built in the early 1930s, the Mexico City Palace of Fine Arts has settled more than 15 feet (4.5m) into the clay soil on which it is built. On the other hand, foundation settlement is usually limited to millimeters or fractions of an inch. When a building’s foundation settles quickly, it can cause damage to the building.

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