Performance of prestressed concrete beams using magnetic water for concrete mixing

Malathy, R.; Narayanan, Karuppasamy; Prabakaran, Mayakrishnan

doi:10.1080/01694243.2021.1936383

Cited by 13 publications

(6 citation statements)

References 35 publications

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“…Coey and Cass [ 46 , 49 ] reveal that the MFTW improves the amount of aragonite in the carbonate deposit rate with a 99.9% probability. The strength development of the MWC is authenticated by the presence of compounds such as

(higher proportionality) and

(lower proportionality) as observed in EDAX quantitative analysis [ 50 ].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Experimental Investigation on the Potential Use of Magnetic Water as a Water Reducing Agent in High Strength Concrete

Malathy¹,

Narayanan²,

Sivamani³

et al. 2022

Materials

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High-strength concrete is designed for a self-weight reduction structure and exhibits higher resistance to compressive loads. This paper proposes a novel technique to enhance concrete’s properties using Magnetic Field Treated Water (MFTW), describing the results of experimental studies to apprehend the fresh, hardened and microstructural behavior of concrete prepared with Magnetic Water (MW) using a permanent magnet with a field intensity of 0.9 Tesla. The novel scheme focuses on utilizing MW as a water-reducing agent instead of SP to improve the workability of fresh concrete with a 0.38 w/c ratio for achieving M40 grade concrete. Results show a 12% improvement in compressive strength and an 8.9% improvement in split tensile strength compared to normal water (NW) with 1% SP. At 30% cement volume reduction, Magnetic Water Concrete (MWC) performs better than Normal Water Concrete (NWC). Microstructure examination shows that a smaller Calcium Hydrate (CH) crystal is formed with MW and its mineral composition is observed through Energy Dispersive X-ray Analysis (EDAX).

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(higher proportionality) and

(lower proportionality) as observed in EDAX quantitative analysis [ 50 ].…”

Section: Discussion Of Resultsmentioning

confidence: 99%

Experimental Investigation on the Potential Use of Magnetic Water as a Water Reducing Agent in High Strength Concrete

Malathy¹,

Narayanan²,

Sivamani³

et al. 2022

Materials

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“…Moisture is retained inside concrete specimens by a uniform blend of admixture. This prevents the evaporation of moisture and helps to cure to occur as soon as necessary after the required curing period [45,50]. This prevents the evaporation of moisture and helps to cure to occur as soon as necessary after the required curing period [45,50].…”

Section: Sem/edxmentioning

confidence: 99%

Evaluation of Aloe barbadensis Miller and Musa x paradisiaca as Internal Curing Agents in Concrete

Malathy¹,

Balakrishnan²,

Prabakaran

2023

Sustainability

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Curing is essential for enhancing the durability and strength of concrete. Researchers found that a lack of conventional curing in earlier days leads to a loss of economy over the years after construction finishes. Self-curing concrete is a contemporary type of concrete that holds water, prevents loss of moisture from the surface, and facilitates self-curing. The existing chemical admixture for self-curing, polyethylene glycol (PEG), is expensive. Hence, in this research, bio admixtures such as Aloe barbadensis miller and Musa x paradisiaca were tried as self-curing agents and compared with the performance of PEG. The functional groups of such bio admixtures match with those of PEG. The results show that the fresh and hardened properties of M30 concrete are better than the conventionally cured concrete and PEG added to concrete. The optimized percentages of admixtures are 0.25% for Aloe barbadensis miller, 1% for Musa x paradisiacal, and 0.5% for PEG, improving the compressive strength by 23.3%, 1.7%, and 4.5%, respectively. Similarly, split tensile and flexural strength have been enhanced up to 4.24 MPa and 15.05 MPa for Aloe barbadensis miller, and 3.82 MPa and 13.65 MPa for Musa x paradisiacal. The characterization studies’, such as XRD (X-ray diffraction), SEM (scanning electron microscope), and EDX (energy dispersion analysis), results show the early formation of hydrated products, such as CSH and CH, after 7 days of curing with an optimized mix. Of the two plant extracts, Aloe barbadensis miller performed better than Musa x paradisiacal and water-cured concrete.

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“…FTIR spectroscopy was performed for the mortar samples to observe the similarities in the functional group of the elements present in it. Samples were examined under attenuated total reflection (ATR) mode between the range 4000-400 cm −1 with a spectral resolution of 4 cm −1 [42,43].…”

Section: Microstructural Propertiesmentioning

confidence: 99%

Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash

Malathy¹,

Shanmugam²,

Chung

et al. 2022

Processes

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A mixture of hydraulic lime and pozzolanic material can be used as a binder in making concrete and mortar for energy-efficient construction purposes. Generally, lime possesses lower strength and higher setting time. By introducing pozzolans in the lime mortar, their cementitious properties could be increased and could compete with the cement mortars. The use of pozzolan-lime binder in mortar reduces the utilisation of cement, and hence reduces the environmental problem originating from cement production. This study mainly deals with the mechanical and microstructural properties of lime and lime composite mortars made up of hydraulic lime, silica fume and rice husk ash. Three composite mortars were made with the following combination such as hydraulic lime-silica fume (LSF), hydraulic lime-rice husk ash (LRA) and hydraulic lime-silica fume-rice husk ash (LSR). Further, their properties were compared with the pure lime mortar. Preliminary investigations were made on the lime reactivity and pozzolanic reactivity tests. It was understood that silica fumes have a (15%) better reactivity than rice husk ash. The introduction of pozzolans in the lime mortar promotes fresh, hardened and microstructural properties. The 28 days’ compressive strength of lime composite mortars achieved more than 16 Mpa, while the lime mortar attained 4 Mpa. The combined effect of pozzolanic reaction, hydration and carbonation in the lime composite mortars achieved four times the strength of lime mortar at 28 days. A high peak of calcium carbonate was detected in lime mortar as a result of carbonation. The well-developed microstructure of calcium silicate hydrate and calcium hydroxide exhibits the formation of hydration products in the lime composite mortars as observed from a scanning electron microscope (SEM), energy-dispersive X-ray (EDX) and X-ray diffraction (XRD). Similar graphs of Fourier transform infrared spectroscopy (FT-IR) showed the presence of equivalent functional elements in all lime composite mortars.

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Performance of prestressed concrete beams using magnetic water for concrete mixing

Cited by 13 publications

References 35 publications

Experimental Investigation on the Potential Use of Magnetic Water as a Water Reducing Agent in High Strength Concrete

Experimental Investigation on the Potential Use of Magnetic Water as a Water Reducing Agent in High Strength Concrete

Evaluation of Aloe barbadensis Miller and Musa x paradisiaca as Internal Curing Agents in Concrete

Mechanical and Microstructural Properties of Composite Mortars with Lime, Silica Fume and Rice Husk Ash

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