Browsing by Author "Dinesh, G."

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    Effect of Surcharge on Analysis of Anchored Sheet Piles Embedded in Cohesionless Soil
    (Springer Science and Business Media Deutschland GmbH, 2025) Dinesh, G.; Nayak, S.; Kumar Reddy, S.K.
    An anchored sheet pile wall is a flexible retaining structure stabilized by anchors placed at a specific depth to resist external forces. The design of these walls is influenced by two key factors: the embedment depth into the foundation soil and the maximum bending moment experienced by the wall. This study presents design charts for anchored sheet piles in cohesionless soil subjected to surcharge loads. Both the conventional free earth support method and finite element analysis using PLAXIS 2D were employed. Multiple scenarios were simulated in PLAXIS 2D using the Mohr–Coulomb model, with an internal friction angle of 34° for the soil and a combination of fixed base boundary conditions. The study also examined different water table positions at the surface, middle, dredge level, and deep below the surface and generated design charts for embedment depth (D) and maximum bending moment (Mmax). Results revealed that the conventional free earth support method tends to overestimate the maximum bending moment. In contrast, the finite element analysis, with detailed mesh refinement and boundary conditions, provided a better assessment of soil–structure interaction, yielding more reliable outcomes. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2025.
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    Influence of curing regimes and duration on the early strength development of fibers based reactive powder concretes
    (Elsevier Ltd, 2025) Yaragal, S.C.; Annigeri, H.V.; Krishna K M, N.; Allikatti, C.; Dinesh, G.; Prashanth, M.H.
    Curing regimes play a crucial role in enhancing the early strength and overall performance of reactive powder concrete (RPC). This study focuses on the influence of different curing regimes on the early strength development of various fibers based RPC mixes. RPC mixes were produced adopting four-stage mixing method. The hot water curing (HWC) and steam curing (SC) regimes achieved a strength of 84 MPa at 24 and 48 h, respectively, being equivalent to the strength of RPC under 28 days of conventional method of water curing (WC). The combined curing (CC) (1 day HWC at 100 °C followed by 7 days of oven hot air curing at 200 °C) and air curing (AC) resulted in the highest and lowest strength of 120 and 74 MPa, while hot air curing (HAC) gave a strength of 96 MPa. Different fibers adopted showed negligible influence on the variation in strength. SEM results revealed that HWC and SC produced predominantly a plate-like tobermorite and dense thick fibrous tobermorite. The HAC and CC regimes showed the presence of tobermorite and xonotlite in the diffraction pattern, whilst HWC and SC displayed tobermorite alone. Nuclear magnetic resonance spectroscopy (NMR) results showed that there is an increase in the hydration degree for hydrothermally treated curing regimes (SC, HWC, and CC) except heat treated (HAC), resulting in higher strength. At higher temperature, the existing chain-like silicates get converted to sheet-like silicates, increasing the mean chain length of C-S-H and degree of connectivity. In summary, the CC regime can be adopted in the construction industry, as it stands out as the most favourable one among all the curing methods for attaining high early strength. © 2025 Elsevier Ltd