Browsing by Author "Maste, Junaid"

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    Bacterial concrete - A remedy for micro cracks
    (AIKTC, 2016-05) Maste, Junaid; Ansari, Md. Parvez (13CE74); Kadri, Aasad (13CE86); Makandar, Imtiyaz (13CE80)
    Carbonate-producing bacteria have attracted lots of interest as a promising, natural, environmental friendly novel technique to improvement of concrete characteristics. Considerable research has been conducted on utilizing microbial-induced carbonate precipitation to mitigate several concrete problems such as crack repair, reduction and modification of porosity and permeability. Furthermore, bacterial carbonate precipitation (bio deposition) has shown positive influences on compressive strength improvement of concrete. In the meantime, it seems that the study related to the optimum dosage of bacterial solution and its effect on the durability of concrete has not been comprehensively investigated. Therefore, it is decided to carry out an investigation of determining optimum dosages of bacterial solution required for concrete by forming various concrete cube samples having variations of bacterial solution viz. 15 ml, 30 ml, 45 ml, 60 ml and 75 ml. Further these various samples are tested under various laboratory methods viz. slump cone test, compressive strength testing machine, ultrasonic pulse velocity test, plate count cells and scanning electron microscopes thereby an optimum dosage required is computed. Bacterial concrete is found to be superior as compare to that of conventional concrete in all the aspects of durability. Among the different specimen incorporated it shows that bacterial concrete containing 45ml solution is the optimum dosage required, after which the strength found to be stable or decreased.
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    Development of product for greywater treatment
    (AIKTC, 2017-04) Maste, Junaid; Shaikh, Kashif (14DCES72); Bhoyal, Hamza (14DCES57); Shaikh, Mohd. Mustafa (13CES54)
    Nowadays world, the usage of water increases day by day and thus resulting the lots of sewage production, and preserving of such a precious gift is now a major issue. As there are very less source of fresh water available so the saving of water is a necessary task. Since there are various treatment method to treat the wastewater but there is need of an efficient step to improve the quality of a wastewater. The treatment based on the residential and commercial level is the next step towards which the treatment of sewage and preserving the fresh water is to be done simultaneously. “The development of product for greywater treatment” is required to treat the greywater by passing through filter media which is placed beneath the kitchen sink cabin and transferring and using the filtered water for cleaning and washing purpose which requires fresh water. Thus for the above purposes various test is to be done i.e. Hardness, Alkalinity, Turbidity, Chlorides, BOD, etc., and the result for the above mention tests were within the permissible limit thus the filtered greywater can be used for the purpose for which the product is been developed.
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    Effect of pH on bacterial concrete
    (AIKTC, 2017-05) Maste, Junaid; Siddiqui, Tanveer (13CE60); Khan, Ayub (13CE22); Sayed, Sharjeel (13CE47); Shaikh, Rehan (13CE57)
    Carbonate-producing bacteria have attracted lots of interest as a promising, natural, environmental friendly and novel technique for improvement of concrete characteristics. Considerable research has been conducted on utilizing microbial-induced carbonate precipitation to mitigate several concrete problems such as crack repair, reduction and modification of porosity and permeability. Furthermore, bacterial carbonate precipitation (bio deposition) has shown positive influences on compressive strength improvement of concrete. In the meantime, it seems that the study related to the Sustainability of bacteria at various pH levels and its effect on the durability of concrete has not been comprehensively investigated. Therefore, it is decided to carry out an investigation of determining the optimum pH value required for cement mortar by forming various cement mortar cube samples having different pH value wiz. 6.25, 6.5, 6.75, 7.0, 7.25, 7.5, 7.75, 8.0, 8.25, 8.5, 8.75. Further these various samples were tested under various laboratory methods viz. Compressive strength testing machine, Moisture content, Acid test on bacterial residue, Rebound hammer test, Colony forming unit/plate test and Scanning electron microscopes thereby an optimum pH value required is computed. Bacterial concrete is found to be superior as compare to that of conventional concrete in all the aspects of durability.
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    Expanded polystyrene concrete blocks
    (AIKTC, 2019-05) Maste, Junaid; Ansari, Altaf (15CES08); Shaikh, Siddique Izmamul Haque (15CES53); Khan, Mohd. Rehan (15CES21); Javali, Rihan (15CES17)
    With increase in demand for construction materials, man has improved a lot in construction Techniques of structures. In earlier ages structures where constructed with heavy materials, But in this modern era of construction old techniques are being more costly due to heavy loading. So the uses of lightweight concrete material are started. The expanded polystyrene beads are the material which substitute in the place of coarse aggregate. The main objective Of this investigation to find a concrete mix proportion which gives better results then the siporex block, and to study the properties, such as density, compressive strength and splitting Tensile strength of light weight expanded polystyrene (eps beads) concrete.Then its properties Are determined with M15 conventional concrete.
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    Microbially self healing cement mortar
    (AIKTC, 2018-05) Maste, Junaid; Hussain, Yusuf (14CE16); Khan, Inamulhaq (14CE25); Khan, Ateef (14CE28); Khan, Shehbaz (14CE34)
    Carbonate-producing bacteria have attracted lots of interest as a promising, natural, environmental friendly novel technique to improvement of concrete characteristics. Considerable research has been conducted on utilizing microbial-induced carbonate precipitation to mitigate several concrete problems such as crack repair, reduction and modification of porosity and permeability. Furthermore, bacterial carbonate precipitation has shown positive influences on compressive strength improvement of concrete. Bacterial concrete is found to be superior in all aspects of durability. In previous studies it is found that bacterial concrete containing 22.5 ml of bacteria is optimum dosage. In the meanwhile, it seems the study related to the exposure in severe environment of bacterial concrete has not been comprehensively investigated. Therefore its decided to carry out an investigation of behavior of bacterial concrete in different severe environment of Chloride and sulphate by forming mortar cubes of bacterial solution 22.5ml/cube and placed in different solution of sulphate and chloride (viz. 5g/lit, 7.5g/lit, 10g/lit, 12.5g/lit, 15g/lit) further these various samples are tested under various laboratory methods (viz. compressive strength, ultra sonic pulse velocity, SEM and mass variation). By doing so, it is found that samples under the different environmental exposures of sulphate and chloride gave the maximum compressive strength of 49.4 MPa in 5g/lit of sulphate and 53.3 MPa in 12.5g/lit of Chloride but these compressive strengths are lesser as compared to conventional cement mortar cubes under same environmental conditions. In this study growth of bacteria is also observed my using mass variation method by observing the weight of samples it is found that the bacteria is growing well in the sample. By performing Ultrasonic Pulse Velocity Test it is found that the quality of cubes are also good.
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    Modification of stepped spillway for hydraulic investigation
    (AIKTC, 2019-05) Maste, Junaid; Khot, Saad (16DCE72); Mohd, Arwaz (16DCE75); Sayyed, A.Basit (16DCE82); Kazi, Moin (16DCE65)
    The terminal structure of a spillway plays a major role in dissipating specific energy of excess flood to safeguard the river channel and downstream structure. The ogee profile spillway is hydraulically efficient, structurally stable and more adequate to dispose excess flood effectively on downstream end of river channel. This spillway will be helpful to control the erosion, scouring and pondage if suitable energy dissipater provided at terminal structure. Due to high discharge of excess flood there are chances of causing erosion on Spillway bed, which is a major problem to affect the spillway capacity. Excess air entrainment causes positive pressure on spillway bed and helpful to achieve maximum energy dissipation by replacing ogee profile by steps. But there are chances of erosion on the nosing of steps which ultimately leads to the failure of structure so to reduce the erosion on nosing and maintain the minimum energy dissipation the sharp edges are converted into curves at specified radius. Therefore, after testing we can conclude that this spillway is best suitable for energy dissipating to overcome the spillway problems by enhancing minimum energy dissipation or not.
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    Smart irrigation using hydroponics in AIKTC
    (AIKTC, 2020-05) Maste, Junaid; Jahagirdar, Sayyeda Zara; Shaikh, Shahrukh (15CE46); Shaikh, Zeeshan (15CE52); Shaikh, Faisal (16CE43); Khan, Shaifali (17DCE55)
    Many of us think that all veggie gardens have to look alike, with rows and mounds of dirt, but vegetable gardening isn't limited to this anymore. In fact, many of the fresh fruits and vegetables you buy in the store are grown hydroponically, especially during the winter months or in colder climates. Hydroponics is a method of growing crops without soil. Plants are grown in rows or on trellises, just like in a traditional garden, but they have their roots in water rather than in dirt. Most of us confuse soil with nutrients. In fact, soil provides structure, not the actual food itself, for plant roots. The food comes from other materials mixed in the soil, such as compost, broken-down plant waste or fertilizers. Plants grown hydroponically can actually grow faster and healthier than plants in soil because they don't have to fight soil borne diseases; in addition, all the food and water they need are given directly to their roots around the clock. The objectives of our present study are to explain the meaning of hydroponics and describe some of its advantages, to describe how hydroponic system differs from traditional system, to identify advantages of hydroponics over soil based system, to identify basic requirements of hydroponically grown plants and to suggest optimum dosage of stabilizer for soil improvement levels. Keywords: hydroponics, smart irrigation, soil less irrigation.
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    Use of Super absorbent polymer in concrete
    (AIKTC, 2019-05) Maste, Junaid; Thonge, Aquib Azim (16DCES87); Qureshi, Amman Rizwan (16DCES81); Khan, Mohd. Asif Mazhar Ali (16DCES76); Qazi, Habeeb Mohinuddin (16DCES65)
    As the role of the concrete increases in the construction Industry due to urbanization of cities and development of industrial area concrete will play essential role in the construction of modern structures. As such efficiency of concrete regarding its various characteristics such as strength, durability, impermeability, shrinkage and creep must be improved. Mitigation of autogenous, drying and plastic shrinkage is the most critical and complex phenomenon of HSC (high strength concrete). In HSC water-binder ratio is low with highly active mineral admixtures such as silica fume widely used in bridges and skyscrapers but it is subjected to early cracking because of intense heat of hydration. This problem could not be solved with traditional external curing because of very low permeability of HSC so after a long research some researchers shifted their attention to internal curing by using polymers, polymers which are capable of absorption and controlled desorption of water within concrete without any other disadvantages like reduction in strength and durability of concrete. SAP (super absorbent polymer) has been gaining popularity with its use in concrete. SAP is a hydrophilic compound in nature. Acrylic acid and acrylamide of potassium and sodium salts are the most commonly used SAP for the purpose of use in concrete. The hydrophilic group of COOH and NH2 contributes to the high-water absorbing capacity of SAP products some of which have a tendency of absorbing 500 to 1000 times its own weight. The desorption of SAP promotes the hydration of surrounding cement paste and advances the primary hydration heat peak. Hydration of cement is increased by 5% around the cement almost Equal to An Increase of W/C By 0.04. Addition of SAP promoted Ca (OH) 2 which improves alkalinity. SAP Increases the internal curing, reduces autogenous shrinkage and increase the relative humidity. The use of super absorbent polymer in concrete is proven to have many positive effects on the properties of concrete in both of its stages, fresh concrete and harden concrete. SAP increases workability of fresh concrete and also releases water when the internal relative humidity of the hardened concrete decreases which Increases internal curing and produce hydrated cement products which increases the strength of hardened concrete.in this study a critical review has been done to overcome the autogenous shrinkage by addition of sap.