The utilization of class F fly ash (F-FA) is limited to 15–30% as a substitution for cement. The study intends to tap into the potential of high-volume F-FA as a pozzolan and micro filler by eliminating aggregates. The article presents the long-term behavior of a novel cement composite called no-aggregate concrete (NAC), incorporating 20% ordinary Portland cement (OPC) and 80% F-FA, with polypropylene (PP) fibers in 0.6, 0.8, and 1.0% volume fractions, in a corrosive environment. The bulk diffusion of preconditioned 100 mm cubes reveals that all mixtures’ chloride-binding capacity increases significantly with prolonged exposure. The total chloride content for mixtures M1, M2, and M3 is within acceptable limits as per EN 206. M4 with 1.0% PP fibers shows a higher total chloride content at 2 cm depth. The average chloride content for all mixtures is within 0.4%. The compressive strength of mixtures cured in water is about 90 MPa at 730 days, and is severely affected in the absence of fibers in a corrosive environment. The microstructure of mixtures at 730 days displays a cohesive, compact, continuous matrix, and the presence of unreacted F-FA.

This article presents the long-term mechanical properties of a novel cement composite, no-aggregate concrete (NAC), containing 80% of low-calcium (class F) fly ash (F-FA) and 20% ordinary Portland cement (OPC) without aggregates. The study investigates the effect of adding polypropylene fibers (PPFs) in varying volume fractions to NAC by conducting compressive, splitting tensile, flexural, bond strength, and sorptivity tests, emphasizing the morphological features over a curing duration of up to three years. The results indicate that adding PPF has an insignificant effect on compressive strength. However, flexural, splitting tensile, and bond strength improve with an increasing volume fraction of PPF. The addition of PPF achieves a ductile failure which is desirable. The initial and final water absorption rate (sorptivity) reduces with the addition of PPF. Further, scanning electron microscopy (SEM) images reveal dense precipitation of C-S-H, while energy-dispersive X-ray spectroscopy (EDS) quantifies the hydration products. The ultrasonic pulse velocity (UPV) affirms the composite’s excellent quality.

The development of special concrete focussed on sustainability and energy conservation has been approached through the use of recycled materials, novel techniques and processes, and materials that harness natural energy. This paper presents the results of one such study on the development of light-transmitting concrete using a novel polymeric transmitting media, poly-methyl-methacrylate, and a detailed analysis of the results obtained. Four variants based on the diameter and number of rods have been studied, with 5 and 10 mm diameter rods incorporated into 100 mm cube samples. A positive correlation between the area of rods and transmittance has been established; however, a loss in compressive and flexural strength was observed. Seasonal and monthly variation results indicate higher transmittance in summer, with the highest transmittance being observed in the month of May and the monsoon having the lowest transmittance, specifically in the month of July. The results of a case study of the application of the material have also been presented. The cost of construction has been studied, and the prediction of electricity consumption during operations has been carried out. The results have indicated the feasibility of use, even with the high initial cost. Variants have been shown to return the investments in a period of 7–31 years. Additionally, three of the four variants showed a sharp decrease in total CO₂ emissions by eliminating the need for energy for daylighting and eliminating the consumption of electricity throughout the service life. Variants have been shown to return the investments in a period of 7–31 years. Additionally, three of the four variants show a sharp decrease in total CO₂ emissions by eliminating the need for energy for daylighting and eliminating the consumption of electricity throughout the service life.

The construction of multistory buildings is associated with increased safety risks due to their complex, vertically structured, and dynamic work environments. Ensuring safety on such sites requires not only regular audits but also effective tools to evaluate and prioritize safety performance. This study introduces a comprehensive framework that combines the compliance index (CI) and the risk matrix to more effectively assess construction site safety. The CI is developed through a structured questionnaire targeting nine key safety categories, including site management, personal protective equipment (PPE) usage, work at height safety, electrical safety, fire safety, welfare facilities, documentation and records, housekeeping and cleanliness, and emergency preparedness. Responses from 30 professionals across various construction projects were analyzed using a standardized 0–3 scoring system. The overall CI was (80.93%), indicating scope for improvement across several areas, particularly emergency preparedness (78.05%) and work‐at‐height safety (79.44%). To further investigate these low‐performing categories, a risk matrix assessment was conducted based on site observations. Hazards were rated on a five‐point scale for likelihood and severity, yielding risk scores that classified each hazard as low, medium, high, or critical. The results confirmed a strong correlation between poor compliance scores and high‐risk hazards, with several critical risks identified in areas lacking basic safety controls. This dual assessment method offers both quantitative benchmarking and qualitative risk prioritization, providing a powerful tool for decision‐makers. By integrating these two approaches, the study facilitates proactive safety management, targeted corrective actions, and continuous improvement in safety performance. This framework enhances the effectiveness of safety audits and serves as a model for future construction safety evaluations, while supporting SDG 3 (good health and well‐being) through the reduction of workplace hazards and SDG 9 (industry, innovation, and infrastructure) by strengthening safety management practices in construction projects.