Sustainable futures can be achieved by limiting non-renewable resource consumption and minimizing waste and associated emissions. Sustainable modified geofoam (MGF) blocks made of sustainable materials contribute to sustainability goals from environmental, societal, and economic perspectives. This study aims to develop MGF blocks prepared by blending cement and rice husk ash (RHA) as a binding material, water, and recycled expanded polystyrene beads. RHA is a silicon-rich agro-waste ash that is used to partially replace up to 30% of cement. MGF blocks were prepared by mixing beads at percentages of 0.50, 0.75, 1.00, 1.25, and 1.5% by the dry weight of the binding material at different water/binding material ratios. The MGF blocks were cured for 7 days, 28 days, and 56 days. This study compares the environmental impacts, energy consumption, and cost analysis of the production of traditional geofoam (TGF) and MGF blocks. MGF can reduce environmental impacts by about 80–95% compared to TGF. The MGF was found to be an eco-friendly, energy-efficient, and cost-effective material.

通过限制不可再生资源消耗并最大限度地减少废物和相关排放，可以实现可持续的未来。由可持续材料制成的可持续改性土工泡沫 (MGF) 块从环境、社会和经济角度有助于实现可持续发展目标。本研究旨在开发通过混合水泥和稻壳灰（RHA）作为粘合材料、水和回收的发泡聚苯乙烯珠粒制备的 MGF 块。RHA 是一种富含硅的农业废料灰，可用于部分替代高达 30% 的水泥。MGF块通过以不同的水/粘合材料比例以粘合材料干重的0.50、0.75、1.00、1.25和1.5%的百分比混合珠子来制备。MGF 块的固化时间为 7 天、28 天和 56 天。本研究比较了传统土工泡沫 (TGF) 和 MGF 块生产的环境影响、能源消耗和成本分析。与 TGF 相比，MGF 可以减少约 80-95% 的环境影响。MGF 被发现是一种环保、节能且具有成本效益的材料。