MIT-World Peace University (MIT-WPU) is a top educational institute located in Pune, India. It is recognized within&nbsp;UGC under Government of Maharashtra Act No. XXXV 2017.&nbsp;

It is part of the MIT group of institutions (established in 1983) which covers 10+ campuses across India and has more than 50,000+ students enrolled across various disciplines at a given point of time. The institute houses 15 schools ranging from Engineering &amp; Technology, Design, Pharmacy, Commerce, Governance among others. It offers undergraduate, postgraduate and PhD programs among different disciplines.&nbsp;

&nbsp;

MIT World Peace University

World University root node

School of Civil Engineering

Engineering and Technology

Lecture Notes in Civil Engineering

Model Testing on PET Bottle Mattress with Aggregate Infill as Reinforcement Overlaying on Fly Ash Under Circular Loading

The continuous and significant excavation of subsurface soil and rock for structural backfilling, impacts the environment negatively. The present study attempts on the exploitation of non-biodegradable and hard-to-dispose waste materials (in different capacities) such as fly ash (FA), rock quarry dust (RQD), and refurbished Polyethylene Terephthalate (PET) bottles were used as an alternative for structural backfill and reinforcement. For model testing, two phase novel methodology was proposed (Unreinforced and reinforced FA system). A total of 29 systems were examined, encompassing a broad range of boundary conditions like FA subgrade system, unreinforced FA system (FA&nbsp;+&nbsp;RQD) with varying RQD layer thickness “H”, and reinforced FA system (FA&nbsp;+&nbsp;RQD with PET bottle mattress as an interface between the FA subgrade and the RQD layer). The parameters pertaining to the reinforcement (width “b”) are varied with respect to the constant value of “H”. Loading was applied on isolated footings for both phases. The model testing demonstrates that the performance of footings resting on RQD laid over stabilized FA subgrade with PET bottle mattress as an interface outperforms other systems significantly. Optimum values for boundary conditions were obtained in case of both the systems. It is observed that in case of reinforced FA system with optimum boundary conditions, the bearing capacity was increased by 10&nbsp;% and the RQD layer’s thickness was reduced by 47&nbsp;% as compared to optimum values of an unreinforced FA system. Further, the optimized values of the phases were validated by using PLAXIS 3D software.

Construction and Building Materials

Effect of isolated footing on fly ash subgrade reinforced with PET bottles: An experimental and analytical study

Rice husk consists of a huge amount of silica when it is burned properly, and cement can be partially replaced by rice husk ash (RHA) to make concrete. In the present experimental research, flexural strength (FS), workability, compressive strength (CS), and indirect split tensile strength (STS) of M30 grade concrete are investigated by partially replacing cement with RHA with an increment of 5%. The influence of the various percentages of RHA as a cement substitution material on the workability, CS, STS, and FS is compared with that of normal M30 grade concrete. The water-cement ratio is 0.55, which is maintained constant. The test results also concluded that the CS, STS, and FS of concrete decreased with an increase in RHA above 15%. The findings of the experimental research show that the optimum percentage of RHA was 15%, at which point the CS, STS, and FS were at their maximum, and any additional RHA addition beyond 15% causes a significant decrease in the CS, STS, and FS, and that it is recommended to replace cement with RHA in the range of 5–15% to achieve an effective and high strength of concrete.1 © 2022

Materials Today: Proceedings

An experimental study on rice husk ash concrete

Globally, disposal of waste materials like fly ash (FA) and polyethylene terephthalate (PET) bottles has reached threatening levels, considering their dumping and natural degradation rate. Considering the PET bottle's cellular shape, they can be used as unique alternative to reinforce and improve the behavior of foundation beds under applied load conditions. Existing research have established that contributing elements such as infill material, properties of the interface, and surface loading geometries all have a direct impact on the behavior of the subgrade. In the current study, the behavior of a square plate footing loaded on rock quarry dust (RQD) overlaying FA subgrade as FA + RQD system for associated boundary conditions of test model has been investigated (bearing pressure was applied till footing penetration depth of 40 mm). Moreover, the system has been assessed for three different conditions, i.e., with, without, and varying cellular reinforcement. The numerical study using finite element analysis (Plaxis 3D) were validated using laboratory model results. FA was modelled as a linear elastic–plastic material with Mohr–Coulomb failure criteria, and PET bottles as cellular reinforcement which have been characterized as an elastoplastic material. Additionally, the validated models have been used to evaluate the performance of conventional high-density polyethylene geocell. The results showed a significant reduction in the settlement accumulation rate and greater resilient settlement for reinforced conditions in comparison to the unreinforced. © 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

Geotechnical and Geological Engineering

Fly Ash Based Subgrade Reinforced with Pet Bottles as Non-conventional Geocell: a 3D Finite Element Analysis

The paper aimed at a detailed case study of cross-passage, which is forced to design and construct by connecting the station box and main tube tunnel of Marol Naka station in Mumbai Metro Line 3, since the marol Naka is densely populated area and elevated metro line is passing over an underground station, therefore further excavation of tunnel is done through the cross-passage. In these station, the cross- passage is constructed for public utilities for connecting the station box to the platform and also for the emergency exit. During tunnel construction, the cross passage is excavated after the main tunnel has been constructed. At the same time, the safety of the cross passage and the stability of the tunnel must be ensured by instrumentation and monitoring. Design of the cross- passage is achieved according to the principles of “New Austrian Tunnelling Method’ (NATM) and the composite lining structure is adopted. NATM is used to widen the station platform which is initially tunnelled by the TBM. The dimension of 230m long and 15m wide Marol Naka station has 16 cross-passages which are constructed connecting the station box to the platform; the observations and the designing part- Finite Element method is used in order to evaluate stress deformations induced on the cross-passage. Keywords: Cross passage, NATM, TBM, Finite element method, Marol Naka station, Emergency exit.

International Journal for Research in Applied Science & Engineering Technology (IJRASET)

A Case Study of Constraint Cross-Passage Construction in Urban Tunneling

An experimental study on PET bottle mattress as reinforcement on fly ash fills

Retaining walls are structures that can be used as a temporary as well as permanent support in underground metro stations and it resist the lateral forces imposed by surcharge load, rock movement and water level. Stability failure of retaining wall has been worked out in sliding by considering the water level ,surcharge load at the front face of retaining walls. In these paper an attempt has been made to study the effect of different diameter secant pile with strut and ground anchor. In this study the researcher has taken two condition into account, the first condition is comparing 600mm diameter secant pile with strut and ground anchor and second condition is comparing 800mm diameter secant pile with strut and ground anchor. The analysis is carried out using finite element modelling on both the prescribed conditions and the result showed us that strut displacement is less than ground anchor.&nbsp;

GIS Science journal

<a href="https://drive.google.com/file/d/1WYBlyrAxMR66oW6xTYjzO_6Vl26VTZkK/view?usp=sharing">Comparative Behaviour Of Retaining Wall With Strut And Ground Anchor Used In Underground Metro Station</a>

In this research the effect of different isolated materials between the machine base and its concrete footing block is examined experimentally. The machine is subjected to vertical vibration produce by vibration exitor 4808 oscillator. Experiments will be performed by inserting isolated material between the machine base and its concrete footing. It is examined that the most vibration absorber is sandwich of E P E foam with rubber pad in between the oscillator and block. even on the ground the resonance is reduced so in this research it is investigated that for any kind of machine, combination of E P E foam and rubber pad can be used to reduce the vibration for the foundation and even to reduce damage to the nearby structures and this study will be beneficial for assessing the performance of the machine foundations.

Journal of Mechanical and Civil Engineering

Economical Method Of Reducing Vibration On Machine Foundation span

Subgrade strength is mostly affected by thickness of pavement, in Highway design. California Bearing Ratio (CBR) is the one of the method to determine the sub grade strength.CBR test is laborious and time consuming, hence a method is proposed for correlating CBR value with the LL, PL, SL, PI, OMC and MDD. In the present study, different soils samples (having 20

International Journal of Engineering Research in Mechanical and Civil Engineering

Establishing Relationship between CBR Value and Physical Properties of Soil

International Journal Of Engineering Science Invention Research {\ldots}

Stabilization of Expansive Soil by RBI Grade-81

a Study on Some Geotechnical Properties of Bio-Enzyme

The structure development and mechanical properties of blow extruded polypropylene containing β-phase nucleating additives was studied. Quinacridone red and cadmium red were both found to nucleate the β phase in polypropylene, the former being a much more efficient nucleator than the latter. The β-phase spherulites formed in the presence of these nucleating agents were small and extensively volume filled, yielding high crystallinity. The modulus increased 2-3 times, elongation at break decreased, and there was a sharp break point without much yield when the β-phase nucleating agents were added as compared to the pure α-phase polypropylene. © 1997 John Wiley of Sons, Inc.