Peatlands are more likely to be affected by intense precipitation and soil erosion, thus requiring modifications for stabilized soil and subgrade protection. This experimental study aimed to find a suitable pavement type using fly ash, an unutilized byproduct from coal burning processes, for peatland areas with a low bearing capacity. We designed lightweight concrete specimens using 15% fly ash substitution to be incorporated into rigid pavement construction. The concrete quality was assessed through compressive and flexural strength tests performed at the ages of 7, 14, and 28 days in order to shorten the project durations and prevent further traffic delay. The obtained results suggested that the substitution of fly ash in 15% of the lightweight concrete mixture can be taken into account to achieve a mixture of a lightweight concrete that meets the general specification criteria for cement-treated subbases (CTSBs). Furthermore, the utilization of fly ash as a new material is considered substantial in managing existing waste-related environmental problems, as well as soil stabilization and subgrade protection problems for low-bearing-capacity soil areas.

This study examines the performance of concrete made with sea sand sea water using two types of cement: Ordinary Portland Cement (OPC) and Portland Pozzolan Cement (PPC), with the incorporation of zeolite powder. Variations in zeolite content (0%, 7.5%, and 10%) were tested to evaluate...

In disaster-prone regions facing chronic housing shortages and growing sustainability demands, modern construction methods are essential to achieving resilience, affordability, and rapid delivery. Modular construction, one of the core components of Modern Methods of Construction (MMC), offers significant potential but remains underutilized in developing contexts due to regulatory, managerial, and technical constraints. This study investigates the multi-stakeholder priorities influencing the adoption of modular construction in Indonesia, with a particular focus on Aceh, a province frequently affected by natural disasters. An integrated Analytic Hierarchy Process (AHP) and Monte Carlo simulation framework was applied to evaluate six main criteria and sixteen sub-criteria, drawing on expert input from five stakeholder groups: academics, planners, architects, consultants, and contractors. The results indicate that Managerial and Planning (0.181), Quality, Safety and Regulation (0.178), and Human Resources and Knowledge (0.174) are the most influential criteria. Among five modular alternatives, Volumetric Modular ranked highest (0.243) for its rapid deployment and disaster-resilient characteristics, followed by Panelized Modular (0.203). Monte Carlo sensitivity testing validated the robustness of these results under uncertainty. This research represents one of the first probabilistic, multi-stakeholder assessments of modular adoption in a developing-country disaster context. Policy implications highlight the urgent need for regulatory reform to standardize modular practices and workforce training programs to strengthen technical capacity, thereby accelerating resilient housing delivery in Aceh and similar regions.

Honey as a natural product produced by bees, has high health qualities and economic value. There are diverse species of bees known to produce honey with essential nutrients such as vitamin C. Trigona bees (Apidae), also known as Linot (in Acehnese language), are one type of bee that is easy to raise and harmless. This species makes nests in hollows of trees, bamboo trunks, wooden burrows, and even crevices in fences, walls and walls of houses. Generally, farmers use houses for storing bee honey made from simple materials in the form of wood, bamboo. This material was chosen because it is similar to the original habitat of bees and can provide ideal conditions for colonies. In the selection of honey facilities and houses, things that need to be considered are the ability of the material to maintain a stable temperature in the hive (because temperature is very important for colony life), resistance to predators and extreme weather, and ease in maintaining and harvesting honey. This paper aims to explain the use of lightweight concrete as an alternative to honey houses. Lightweight concrete is lightweight concrete, has good thermal insulation properties and is resistant to fire and heat. The installation of the Linot honey house was applied in Ie Seum Village as a beneficiary village for the service activities carried out. It can be seen that linot bees still use honey houses to store their honey and the honey production produced is not much different from other honey houses.

Portland cement production is currently one of the major sources of global carbon dioxide emissions. This makes Portland cement production a significant contributor to global climate change. To mitigate these environmental impacts, Supplementary Cementitious Materials (SCMs) are expected to...