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INDONESIA
Civil Engineering Journal
Published by C.E.J Publishing Group
ISSN : 24763055     EISSN : 24763055     DOI : -
Core Subject : Engineering,
Civil Engineering Journal is a multidisciplinary, an open-access, internationally double-blind peer -reviewed journal concerned with all aspects of civil engineering, which include but are not necessarily restricted to: Building Materials and Structures, Coastal and Harbor Engineering, Constructions Technology, Constructions Management, Road and Bridge Engineering, Renovation of Buildings, Earthquake Engineering, Environmental Engineering, Geotechnical Engineering, Highway Engineering, Hydraulic and Hydraulic Structures, Structural Engineering, Surveying and Geo-Spatial Engineering, Transportation Engineering, Tunnel Engineering, Urban Engineering and Economy, Water Resources Engineering, Urban Drainage.
Arjuna Subject : -
Articles 1,972 Documents
Synthesis of Nano-Silicon Hybrid Alkyl Carboxylate to Inhibit Water and Chloride Transport in Concrete Ruixing Chen; Meng Yang; Zhen Liu; Yiming Ren; Pengyu Qian; Wenhua Zhang
Civil Engineering Journal Vol. 12 No. 5 (2026): May
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-05-025

Abstract

Concrete is vulnerable to water and chloride ingress because of its porous structure and hydrophilic hydration products. To address the poor dispersion, hydration interference, and strength loss often associated with conventional hydrophobic modifiers, this study synthesized a nano-silicon hybrid hydrophobic polymer ester (HPE) based on C12 alkyl carboxylate groups. Unlike conventional nano-silicon or alkyl-based modifiers that mainly rely on pore refinement or surface hydrophobization alone, HPE integrates C12 alkyl carboxylate groups with nano-silicon to construct multiple transport barriers. The effects of HPE dosage on concrete properties and transport-inhibition mechanisms were evaluated using contact angle, water absorption, electrical flux, rapid chloride migration, natural chloride diffusion, compressive strength, SEM, and MIP tests. HPE increased the contact angle from 14° to 78° and reduced long-term water absorption to 28% of the control. The electrical flux and chloride migration coefficient decreased to 48% and 62% of the control, respectively. MIP results showed reductions of 67.9% in the most probable pore diameter and 28.4% in total porosity. The enhanced durability is attributed to hydrophobic film formation, in-situ pore-blocking particles, and nano-silicon-assisted pore densification.
Assessing the Relationship Between Groundwater Dynamics and Land Subsidence Using Time-Series SAR Data Yehia Miky
Civil Engineering Journal Vol. 12 No. 5 (2026): May
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2026-012-05-07

Abstract

Groundwater is considered as the primary source of drinking and agricultural supply for most residents in Mecca region. However, data indicates that groundwater restore is substantially lower than the consumption rate, which results in a reduction in the quality of water and decline in groundwater levels. This, in turn, has resulted in surface subsidence, causing problems in infrastructure. The main aim of this research is to assess the correlation between groundwater dynamics and surface subsidence in the Mecca region using time-series SAR imagery. So, time series maps of land subsidence, along with the spatial distribution of long-term subsidence from 2016 to 2025, were generated. The results indicate that the basin experienced an average deformation velocity of less than 4 cm/year, with maximum subsidence reaching 15.2 cm in highly compressible soils. The analysis further shows that land subsidence generally increases with higher groundwater extraction rates. However, only two soil types (the Abbasah Formation and the diorite–pyroxenite unit) exhibited a substantial positive correlation between groundwater flow rate and subsidence (R2 = 0.67). Quantitative analysis of the correlation helps water managers to take the necessary actions, such as identifying crop types, and irrigation methods, to preserve and sustain the Kingdom's water resources.

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