The application of stabilized soil is fast expanding around the world, and it is delivering improvements to the construction industry. Stabilized soil is a popular choice for reinforcing road embankments around the world. A layer of cement-stabilized soil can reduce the settlement of the soil layer below the embankments. This case study compares the long-term settlement of road embankments with and without cement-stabilized soil layers of the Chittagong Port Access Road located at Teknaf Bangladesh. The settlement analysis of the road embankment was performed using the Finite Element Analysis with Plaxis2D. In this study, two forms of sequence modeling were used. First, the settlement of a road embankment without reinforcement was examined. The second modeling step was to determine the settlement of an embankment reinforced with a cement-stabilized soil layer. Following the simulation, a comparison was performed. Additionally, the effect of cement content (4%, 8%, and 12%), compaction energy, and single, double, and triple layers of cement-stabilized soil on long-term settlement along with the factor of safety of the embankment have been addressed. The results demonstrated that using this specific cement-stabilized soil below the road embankment has decreased the long-term settlement of the soil while increasing the safety of the embankment compared to that without the cement-stabilized soil reinforcement.

This study investigates the combined effect of internal curing and pozzolanic activity in mortar through the incorporation of clay-burnt brick fines (CBBF) as a partial substitute for sand. Simultaneously, the study explores the degree of pozzolanic reactivity by replacing a part of cement with finer clay-burnt brick fines (CBBP, particle size <75 μm). These materials are sourced from waste materials generated during brick-chip production. The 50 mm cubic mortar specimens were prepared by substituting a portion of fine aggregate with pre-wetted CBBF up to 20 % v/v and replacing cement with CBBP up to 27 % v/v. Two separate sand-to-cement ratios (S/C) of 1.2 and 1.6 were used in the mortar mixes. Samples underwent mechanical testing and were analyzed using ultrasonic pulse velocity (UPV) and accelerated carbonation tests. At a S/C of 1.6, increasing CBBF content in the mortar led to higher compressive strength. Conversely, for S/C = 1.2, the optimal replacement level was 4 % v/v of CBBF, beyond which compressive strength gradually decreased due to the porous nature of CBBF particles. Moreover, an 8 % CBBF replacement demonstrated maximum resistance to carbonation. SEM analysis revealed a denser matrix, indicating the effectiveness of CBBF in enhancing mechanical and durability properties.