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All Journal International Conference on Coastal and Delta Areas Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi
Widya Ayu Prawesthi
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Dentistry Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Transportation Veterinary Other

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Stabilization of the Shear Strength of Clay Soil with Limestone Powder Widya Ayu Prawesthi; Lelita Pratiwi Santosa
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

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Abstract

Soil is base and the most widely material used for civil engineering and structural engineering construction. However, not all kind of soils can be used for the construction. For a soil having low a shear strength such as a soft soil, it needs to stabilize. Stabilization methods that commonly used are by compaction or chemical stabilization. With the objective to study the shear strength of clay soil, this research performed an experimental study by adding variation of limestone powder to clay soil. The clay sample is from Nganjuk city, East Java that is classified as a montmorillonite clay with Gs number is 2,698; liquid limit 62,6 %; plasticity index 19,07% , and the qu number is 1 Kg/cm2. The percentages of the limestone powder were in 5%,10%,15%,and 20%. The pure clay and modified clay were tested using Unconfined Compression Test (UCT). The result showed that with the addition of 20% limestone powder may decrease the Gs number to be 2,351; liquid limit 54,2%; and plasticity index 7,81 %; however the qu number increased with the addition 5-15% limestone powder but it decreased with 20%. Keywords: clay soil, soil stabilization, limestone, shear strength, unconfined compression test
Peningkatan K3 dan Produktivitas Pekerja Konstruksi pada Proyek Rumah Kos Talitha Hafira; Nur Fithriani Fatma Cholida; Iryan Dwi Handayani; Widya Ayu Prawesthi
ABDIKAN: Jurnal Pengabdian Masyarakat Bidang Sains dan Teknologi Vol. 5 No. 1 (2026): Februari 2026
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/abdikan.v5i1.7158

Abstract

This community service activity was motivated by the low awareness of construction workers towards K3 in a small-scale boarding house construction project in Wanamukti, Tembalang, Semarang, where the construction sector contributes >30% of national work accidents due to minimal use of PPE and supervision. The problem formulation includes low knowledge ofK3, non-compliance with PPE, and the absence of simple SOPs that lead to high risks and low productivity. The program's objective is to improve understanding, skills, and a safe work culture through training and mentoring. The research method consisted of an initial survey, a pretest with 15 workers, applied K3 training with PPE demonstrations and safety talks, field mentoring, and a posttest using the N Gain formula. The results showed an increase in posttest scores from the range of 30–60 to 70–95 (100% of participants increased), with an average N Gain of 56.78% (moderate category); workers began to get used to wearing helmets, safety shoes, and gloves, and a decrease in unsafe acts. The conclusion is that the training is effective in improving safety and productivity. Suggestions for future service include continuing regular training, developing K3 SOPs, and expanding to similar projects in several other cities.
Co-Authors Iryan Dwi Handayani Lelita Pratiwi Santosa Nur Fithriani Fatma Cholida Talitha Hafira