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All Journal U Karst Journal of Civil Engineering and Vocational Education
Sefiyanti, Redyka
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Civil Engineering, Building, Construction & Architecture Education Engineering Environmental Science Transportation

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Increasing Compressive Strength of Self Compacting Concrete with MasterGlenium and MasterSure Sefiyanti, Redyka; Mahardana, Zendy Bima; Rahmawati, Apriliya Laily; Husna, Nadiya; Zakiya, Zaizafun; Naufalanto, Hafiizh; Yuantono, Tegar Bhakti
UKaRsT Vol. 8 No. 1 (2024): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v8i1.5565

Abstract

The growth in development complexity demands innovation in the construction industry. Self-compacting concrete (SCC) can flow and fill mold cavities without additional vibration, offering an efficient solution for structures with complex shapes or tight spaces. In addition, SCC can speed up bonding and simplify workability by adding MasterGlenium and MasterSure superplasticizers. However, its use is limited due to a lack of understanding of the optimal composition of the mixture. The research aims to determine the effect of adding MasterGlenium and Maste Sure in the concrete mixture on the compressive strength of concrete. Experimental research was conducted with a mixture of MasterGlenium additives at 0.25%, 0,30%, 0,35%, 0.40%, and MasterSure 0.30% of the total binder. Slump and compressive strength tests of concrete are carried out to determine workability and quality performance. The research results showed that the optimal concrete mix with the addition of MasterGlenium 0.35% and MasterSure 0.30% was 25.39 Mpa, higher than Normal concrete 15.21 Mpa. The slump test results confirm that the concrete is classified as SCC. This shows the importance of the composition of MasterGlenium and MasterSure superplasticizers on the compressive strength of SCC concrete. So, the results of this research can be used to improve the quality of concrete structure projects.
Mencegah Kelongsoran dengan Meningkatkan Angka Keamanan Lereng Rahmawati, Apriliya Laily; Candra, Agata Iwan; Sefiyanti, Redyka; Husna, Nadiya; Febrian, Bagas
CIVED Vol. 10 No. 2 (2023): June 2023
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v10i2.402

Abstract

Kecamatan Pujon merupakan daerah dengan intensitas bencana longsor cukup tinggi. Tanah longsor terjadi di Dusun Sukomulyo, Kabupaten Malang dipengaruhi oleh minimumnya vegetasi berakar dan tingginya intensitas curah hujan yang berdampak negatif bagi masyarakat sekitar. Tujuan penelitian ini untuk menganalisis kestabilan lereng dengan dilakukan pengujian untuk menentukan nilai atterberg limit, gradasi ayakan, uji kuat geser, analisis stabilitas lereng dan optimalisasi sudut kemiringan sebagai upaya penanganan risiko bencana tanah longsor. Penelitian ini menggunakan metode kuantitatif dengan pengujian di lapangan dan di laboratorium. Hasil penelitian menunjukkan bahwa tipe longsor daerah penelitian yaitu translasi slide. Didapatkan nilai plastic index 26,22 % dengan jenis tanah Sand Poorly Graded. Hasil Pengujian Geser menghasilkan sudut geser 3,12 dan kohesi 7,68 pada keadaan basah. Hal tersebut diketahui Nilai Fs<1 menunjukkan lereng kurang stabil, dengan cara melakukan pemotongan atau pelandaian lereng menjadi 16 derajat maka nilai factor of safety 1,04 FS >1 dinyatakan stabil. Penelitian ini dilakukan sebagai dasar awal dalam merencanakan kemiringan lereng yang stabil, sehingga terjadinya kelongsoran bisa diminimalkan.
Analysis of Soil Bearing Capacity in Kauman, Tulungagung as a Subgrade For Flexible Pavement Fathurrohman, Nadi Rheiza; Cahyono, Andri Dwi; Sefiyanti, Redyka; Pasya, Salman Alfaridh; Oktabernandus, Satria Perdana; Qalby, Atsfiela Dzulkhan; Ichwan, Zainal
CIVED Vol. 11 No. 2 (2024): June 2024
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/cived.v11i2.591

Abstract

This research aims to evaluate the bearing capacity of the soil in Kates Village, Kauman District, Tulungagung Regency, as a subgrade in flexible pavement through California Bearing Ratio (CBR) testing in the Civil Engineering Laboratory of Kadiri University. The tests were conducted with 56, 25, and 10 blows to determine their impact on the soil's density, strength, and stability. The results showed that soil with 56 blows had the highest CBR value of 28.660% at a 5.08 mm penetration, indicating excellent bearing capacity. The soil with 25 blows showed a CBR value of 17.060%, which is quite high, ensuring adequate stability and bearing capacity. Conversely, the soil with 10 blows had the lowest CBR value of 4.094%, indicating the need for additional compaction before being used in road construction. This research confirms that the number of blows has a significant impact on soil quality, with more intensive compaction improving the soil's density and stability. The final design CBR value obtained was 16%, leading to the conclusion that the soil in this area can be used as a subgrade for flexible pavement.
Co-Authors Agata Iwan Candra Andri Dwi Cahyono Fathurrohman, Nadi Rheiza Febrian, Bagas Husna, Nadiya Ichwan, Zainal Naufalanto, Hafiizh Oktabernandus, Satria Perdana Pasya, Salman Alfaridh Qalby, Atsfiela Dzulkhan Rahmawati, Apriliya Laily Yuantono, Tegar Bhakti Zakiya, Zaizafun