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Intansari, Dyah Widi Astin

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Author-ID : 8670924

Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Social Sciences

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Perawatan Sampel Beton dengan Membran Pengering dan Air Pengering Mempengaruhi Kekuatan Tekan Beton di Lab. KAK Kebumen Aryadi, Haris Tri; Intansari, Dyah Widi Astin
Jurnal Kridatama Sains dan Teknologi Vol 7 No 01 (2025): Jurnal Kridatama Sains dan Teknologi
Publisher : Universitas Ma'arif Nahdlatul Ulama Kebumen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53863/kst.v7i01.1586

The problem that occurs in fresh concrete is the imperfect cement hydration process due to too rapid water loss. This can cause the concrete to become weak, cracked, and not reach the desired compressive strength. The cement hydration process requires sufficient water to react with the cement and form a strong concrete structure. However, if water is lost too quickly due to evaporation, the hydration process cannot take place perfectly. Realizing this problem, we conducted a research experiment to find, compare, and evaluate the effect of various curing techniques on the compressive strength of concrete. The planned concrete quality of 18.68 Mpa was made from a cylinder with a diameter of 15 cm and a height of 30 cm as many as 10 samples. After curing, the concrete was tested twice: soaked in water at 10.19 MPa and 16.98 MPa; doused with water at 11.04 MPa and 11.32 MPa; and wrapped in wet burlap sacks at 8.49 MPa and 10.75 MPa. Treatment wrapped with plastic wrap showed results of 3.96 MPa and 15.28 MPa, while without treatment at outside temperature was 10.47 MPa and 11.32 MPa. The results showed that there was a significant difference in the compressive strength of concrete as measured by the compressive strength of concrete soaked in water for 28 days with treatments of 7 and 28 days respectively. Treatment by soaking in water showed an increase of 54.55% and 90.89%, treatment by sprinkling water increased by 59.10% and 60.59%, treatment by wrapping using wet burlap showed an increase of 45.44% and 57.54%, treatment with plastic wrap increased by 21.19% and 81.79%, while without outdoor treatment had an increase of 56.04% and 60.59%. The results showed that concrete soaked in water for 28 days produced the best compressive strength

Optimasi Waktu dan Biaya dengan Metode Crashing pada Proyek Pembangunan Jalan Simp. 4 Kaliorang – Talisayan Kalimantan Timur Nardiansyah, Afrie; Intansari, Dyah Widi Astin
Jurnal Kridatama Sains dan Teknologi Vol 4 No 02 (2022): JURNAL KRIDATAMA SAINS DAN TEKNOLOGI
Publisher : Universitas Ma'arif Nahdlatul Ulama Kebumen

A common construction problem is delays in project implementation. Delays on the project will affect the cost of the project. Seeing this incident, this study will analyze the acceleration of project time on the Road Construction project Simp. 4 Kaliorang - Kalisayan using the Precedence Diagram Method (PDM) using Microsoft Project 2010 software, so that jobs are on the critical path. The work that is on the critical path will be crashing with the method of adding working hours (overtime), and adding tools, the final result of the two alternative crashing will be a change in the acceleration of the duration of a project at an optimal cost. From the results of time and cost optimization research with the crashing method on the road construction project simp. 4 kaliorang - talisayan using the alternative of additional working hours (overtime) for 3 hours, 4 hours, 5 hours, and 6 hours and the second alternative with variations in the addition of tools and energy by 25%, 50%, 75% and 100% of the total equipment and normal power obtained the final result of the most optimum alternative of the two alternatives is the alternative of adding tools and energy by 100% of the number of normal tools and energy, the crash duration is 91 days from the normal duration of 135 days or an acceleration of duration of 44 days, with a total cost of Rp. 10,825,046,816.96 from the normal total cost of Rp. 10,868,916,625,88 or a decrease in total costs of 0.40%. Keywords: Delays, critical path, crashing, additional working hours (overtime), additional workforce, PDM (Precedence Diagram Method)

Perencanaan Sistem Penyediaan Air Bersih dengan Metode Treatment di Desa Sidogede Kecamatan Prembun Kabupaten Kebumen dalam Program Pamsimas III 2021 Intansari, Dyah Widi Astin; Susanto, Ari
Jurnal Kridatama Sains dan Teknologi Vol 4 No 02 (2022): JURNAL KRIDATAMA SAINS DAN TEKNOLOGI
Publisher : Universitas Ma'arif Nahdlatul Ulama Kebumen

The supply of clean water for the residents of Sidogede Village, Prembun District, is currently insufficient. In order to be able to obtain water for their daily needs, some people still transport it. The need for clean water in some places does not match the amount of clean water available in that place, so that it does not meet the demand for water. Around this area there is a river flow which has the potential to be utilized for planning the supply of clean water. Population growth for this village is calculated by projecting water demand. Plan year on the water supply system for the next 15 years from 2021. In this study, four units of parallel dug wells were used for extraction. The clean water supply system includes raw water intake, reservoir, processing, and distribution systems in providing clean water. The distribution of clean water to service locations uses a gravity system with a simple water treatment system with a 3m x 2m x 2m reservoir to store water and become one building with a treatment tub. The clean water treatment design uses treatment processing which contains zeloid stones. The design of a clean water supply system uses hydraulic calculations for pipe dimensions. The use of infiltration wells with pumps is channeled to the Treatment Tub and to the Reservoir and then channeled to the service area using PVC pipes. The diameter for the transmission pipe is 1.5'' and for the distribution pipe is 1''. Keyword: distribution, treatment, hydraulics, pipes, reservoirs

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