Application of Nanotechnology in Smart Civil Structures

Yash Kothari 1, Snehal Dewalkar 2
1Department Of Civil Engineering, Sinhgad Academy Of Engineering (SAE), Kondhwa (BK), Pune-48, India
2Department Of Civil Engineering, Sinhgad Academy Of Engineering (SAE), Kondhwa (BK), Pune-48, India

Nanotechnology has the potential to make construction faster, safer, cheaper and more varied, resulting in smart construction. Automation of nanotechnology construction can allow for the creation of structures from advanced homes to gigantic skyscrapers much more quickly and at much lower cost and higher efficiency. In the near future, Nanotechnology can be used to sense cracks in foundations of structures and can send nanobots to repair them. It can also provide self powered failure prediction and prevising mechanisms for high capital structures.

This paper explores the vision in making of smart and innovative infrastructure and leading a smart city with the help of application of nanotechnology in civil structures.

The study of nanoscience and various nanoparticles and their implementation in construction field is illustrated in this paper. The article further emphasizes more on the futuristic demand and application of nanotechnology in constructing smart structures. The paper is managed to be written in simple language for easy grasping.

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Study On Behaviour Of Concrete Partially Replacing Quartz Sand As Fine Aggregate

E.Divya1 , R.Shanthini2, S.Arulkumaran3
Student, Dept. of civil engg., IFET college of engg., India1, 2
Asst. professor, Dept. of civil engg., IFET college of engg., India3

The use of quartz sand as replacement for sand is an economical solution for making the concrete resistant to weathering. The paper presents a concrete mix design procedure for partial replacement of sand with quartz sand. Present method was performed to evaluate the additional compressive, flexural strength with higher slump over conventional concrete in which sand is replaced with 0%, 25%, 50% and 100% of quartz sand by weight with 1% super plasticizers. The research also revealed that there is possibility of replacing fine aggregate with quartz sand in the production of structural concrete. The mix proportion adopted was 1:1.7:3 as per 10262:2009. Compressive and flexural strength tests were carried out to evaluate the strength properties of concrete at the age of 7 and 28 days. Modulus of elasticity tests were carried out at the age of 28 days.

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Noise Pollution from Vehicular Traffic from Selected Junctions in Bengaluru

Paul Pop, Rashmi Kulranjan, Nived Uthaiah. P, Radhika V G
St Joseph’s College, Bengaluru

Mahesh Kashyap, Consultant, Bengaluru

Noise pollution can be defined as the unwanted sound that is released to the environment and disturbing the human beings. Sources of noise pollution include industrial sources, non-industrial sources, vehicles, uncontrolled use of loud speakers, construction activities such as drilling, etc. Noise levels from vehicles through engines and horns are the main cause of concern in cities and may potentially contribute about 60% of total noise pollution. An attempt was made to measure noise levels emanating from vehicles on selected roads within a radius of approximately two kilometers from St Joseph’s College. These are major roads that witness heavy traffic during peak and non-peak hours. Traffic volume and noise levels were measured at various junctions on these roads during peak and non-peak hours. The study also includes remedial measures that can be implemented to reduce the noise levels.

Keywords: Noise, Vehicles, Pollution, Decibels
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Aquifer Characteristics in UYO Metropolis

UKPONG, E. C and ABARAOGU, Civil Engineering Department, Faculty of Engineering University of Uyo, Akwa Ibom State, Nigeria.
UDECHUKWU JOHN Civil Engineering Department, Faculty of Engineering University of Uyo, Akwa Ibom State, Nigeria.

The description and location of geologic formations and water-bearing zones within the study area are discussed. The geologic aquifer in the area are the upper, medium and lower sands. Pumping test and soil sample data were obtained from Ifa Atai, State Secretariat and Ewet Housing Estate all in Uyo metropolis were analysed. The analysis reveals the following Aquifer and well characteristics, permeability (3.74-20.952) m/d, transmissivity (146.13-914.63) m2/d, storativity (0.141-0.181), specific capacity (4.26-28.69) m3/h/m, well efficiency (77.31-95.03%), expected drawdown (4.36-29.34)m. The result shows that the geologic formation have good water-bearing formations with medium sand being predominant. Draw down values after prolonged pumping test are indicative of high well productivity. Generally the aquifers in the study area are permeable and of high storage capacity.

Keywords: Pumping test, soil sample data, geologic formations, aquifer, permeability, and specific capacity.

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Materials Engineer
Kaushal Kishore is retired from IIT, Roorkee and now a Consulting Materials Engineer. He has over 50 years of experience in all types of Concrete Mix Design.

Vice President Project
Supertech Limited
Rakesh Sharma is Vice President Project of M/s Supertech Limited. He has 28 years of experience in Construction.

I.T. Park, Doon Square Mall at Dehradun, Uttarakhand is being constructed by M/s Supertech Ltd. For this site M-30 grade of concrete suitable for pumped concrete is required. Aggregates for construction was stored at site. Its analysis report is given in Table 2.

For laboratory trial 5 brands of PPC cement bags were taken from local market. They were identified as cement brand, 1, 2, 3, 4 and 5. Two reputed brands of normal superplasticizers based on sulphonated naphthalene formaldehyde (SNF) were taken for trials. They were identified as SP (A) and SP (B) to find their compatibility with the given 5 brands of PPC cement identified as cement brand 1, 2, 3, 4 and 5.

The behavior of concrete in the presence of superplasticizers is related to the amount and type of sulfate added to the clinker. The rheological and setting Behavior are changed depending on whether the sulfate is added as anhydrite, hemihydrates, or gypsum. The difference are explained by the different rates of dissolution of these sulfates.
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