Rr. M.I. Retno Susilorini
Soegijapranata Catholic University

Published : 5 Documents

Found 5 Documents

Efektivitas Uji Tidak Merusak Dan Uji Merusak Pada Dinding Bata Beton Hasil Perbaikan Dengan Additive Kimiawi Di Daerah Rawan Rob Putra, Ludfie Hardian; Kurniawan, Erik; Susilorini, Rr. M.I. Retno; Santosa, Budi
G - SMART Vol 2, No 1: Juni 2018
Publisher : G - SMART

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (486.611 KB) | DOI: 10.24167/gs.v2i1.1454


This research was conducted by using non-destructive test method and destructive test to investigatethe compressive strength of repaired concrete masonry wall with chemical additive sited at Sriwulan Village which is tidal flooding prone area and PucangGading Village. Non-destructive test using Hammer Test was conducted at age 12 months, 13 months, and 14 months after concrete masonry wall being repaired.It was found that in Sriwulan Village, the highest compressive strength is 49.37 MPa at age 14 month whilethe highest compressive strength value is on the in PucangGading is 50,51 MPa at age 13 month. It was also found that destructive test using Core Drill Test was conducted at age 14 month after the masonry wall have been repaired. The highest compressive strength in Sriwulan village was 58,6 MPa and in PucangGading was 82,63 MPa.
A Computer Modeling of Fracture Based Pull-Out of Nylon 600 Embedded in Cementitious Matrix Susilorini, Rr. M.I. Retno
Civil Engineering Dimension Vol 11, No 2 (2009): SEPTEMBER 2009
Publisher : Institute of Research and Community Outreach - Petra Christian University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (576.029 KB) | DOI: 10.9744/ced.11.2.pp. 89-99


This paper reports the development of a computer model that represents a pull-out process of nylon 600 embedded in cementitious matrix. The model is based on fracture approach considering the Poisson’s effect and stable crack length. To back up the model four pull out tests of nylon 600 fiber, diameter 1.1 mm, with two fiber embedment lengths, 100 mm and 120 mm are done. The numerical approach is then compared to the experimental results. The computer model is built on Delphi 7 and named “Program Cabut-Serat Fraktur". This study shows that the computer model could represent the fracture phenomenon during the pull-out process.
Kinerja Rangkak pada Balok Beton Sandwich dengan Isian Styrofoam (Cement EPS Sandwich Panel) Ardin, Rilo Hanif Hasbi; Ariesta, Yohanna; Susilorini, Rr. M.I. Retno; Widianto, David Widianto
G - SMART Vol 1, No 2 (2017)
Publisher : G - SMART

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.161 KB) | DOI: 10.24167/gs.v1i2.1392


Precast material is a user-friendly construction product. One innovation that is being developed is sandwich concrete. Sandwich concrete is composed by skin layers, that are strong and stiff, and lightweight concrete as core layer. As a part of builiding construction, each structural and non-structural element resists load in certain time. The purpose of this research is to investigate creep performance of concrete sandwich beam. By observing the effect of creep, it can be known the long-term effect due to the constant loading on a material. The test specimen is formed of sandwich construction beam, with its core layer consists of lightweight concrete and styrofoam (cement EPS sandwich panel) mixture. This research conducted with two kinds of size and proportions of specimen, single beam (length=100 cm; width=20 cm; thickness=7,5 cm)and double beam (length=100 cm; width=20 cm; thickness=7,5 cm)which is a combination of single beams glued together with Sikabond. The loading method that used in this research is third point loading as described on ASTM C393 in two positions, horizontally and vertically. After having loaded of 3 kN in 2 hours, each test specimen has deflected and gives creep strain value. The values of creep strain are: specimen RH-S01 by 3,23%, specimen RV-S03 by 0,40%, specimen RH-D03 by 0,60%, dan specimen RV-D02 by 0,32%.The smallest value of creep strain obtained by double beam that was tested vertically, due to have greater EI value than the horizontally tested specimens. According to the maximum deflection and load that can be resisted by the specimens, sandwich concrete shall not be recommended for structural beam. This research shows that the creep effect of constant loading by 3 kN for 2 hours on sandwich concrete beam is not secure
Durabilitas Mortar Polimer Termodifikasi Alami dengan Amylum dan Bahan Tambah Madu Prasetyo, Nanda Isdian; Abiyoga, Gerald Arsa Adhiyaksa; Susilorini, Rr. M.I. Retno; Santosa, Budi
G - SMART Vol 2, No 1: Juni 2018
Publisher : G - SMART

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (489.075 KB) | DOI: 10.24167/gs.v2i1.1449


The research aimed to investigate the durability of natural modified polymer mortar with amylum and honey admixture of aggressive environment that was modeled by 3 curing media, sea water, brakish water, and tidal flooding water. There were 855 specimens of mortar cubes with addition of amylum of 0,1%, 0,2%, 1%, 2%, and 5% and also honey of  0%, 0,03%, and 0,03%. All specimenswere cured and distributed into 3 curing medias for 7, 14, and 28 days. The result of this research met conclusion that optimum compressive strength was achieved by specimen with composition 0,1%  amylum and  0,03% honey that was cured by sea water.
Jurnal Litbang Provinsi Jawa Tengah Vol 1, No 2 (2003): Jurnal Litbang Provinsi Jawa Tengah
Publisher : Badan Penelitian dan Pengembangan Provinsi Jawa Tengah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36762/litbangjateng.v1i2.31


Indonesia faces a very deep complicated multi crisis. It has influenced the role of construction field development in this country. The concrete technology  field, as the major material engineering field,  must create a breakhtrough to cover the limited construction material that is cost higher and higher in every minutes. The innovation of concrete material, especially in fiber concrete, has developed by many researchers.  Improving of local materials for fiber concrete, the materials of coconut fiber (coir) could be expected to become entrance gate to reach better future of public materials. The research conducted some experimental tests, with some concrete (mixed to coconut-fiber) cylinders specimens tested by splitting-tensile  test. The volume of coconut fiber in concreteis 0.25%, the length of conconut-fiber vary with 40 mm, 60 mm, 80 mm, and 100 mm. Splitting-tensile   test of specimens  has performed good splitting-tensile  stress of concrete. The research concluded :   (1) The optimum value of split ting-tensile stress of coconut-fiber concrete has reached by volume of25% variety with length 80 mm, (2) The coconut-fiber has given advantage in increasing the concrete performance that is avoiding the microcrack and giving a better splitting-tensile strength compared to normal concrete, (3) The performance of splitting-tensile stress of coconut fiber concrete increased by 13.62%  compared to normal concrete