Ridho Bayuaji
@its.ac.id
Civil Infrastructure Engineering, Faculty of Vocational
Institut Teknologi Sepuluh Nopember
RESEARCH INTERESTS
Green Material in Civil Engineering, Geopolymer Concrete
Scopus Publications
Scopus Publications
M. Sigit Darmawan, R. Bayuaji, R.B. Anugraha, D.A. Saputra, and M.A. Victoriawan
Elsevier BV
Rifqi Nadhif Arrafid, Hendro Nurhadi, Yuyun Tajunnisa, Ridho Bayuaji, and Wahyuniarsih Sutrisno
IEEE
The advent of 3D printing mortar technology heralds a transformative era in construction, offering a superior alternative to traditional methods in terms of efficiency, cost-effectiveness, and speed. This groundbreaking technology seamlessly integrates three-dimensional computer design, computer-aided design (CAD), rapid prototyping, and mechatronic components to enable the creation of structures through additive manufacturing. Additive manufacturing's layer-by-layer approach allows the precise realization of complex geometric designs. 3D mortar printing technology revolutionizes engineering practices by facilitating safer construction processes, reducing costs, and accelerating construction. The end products of 3D mortar printing exhibit exceptional precision, accuracy, and the capacity to realize intricate architectural designs. A significant milestone in developing 3D printing technology for construction was achieved by Behrokh Khosnevis in 2004 with the introduction of contour crafting (CC). As Indonesia experiences population growth and increased human capital, the demand for rapid construction solutions escalates. This paper conducts a technical analysis focused on the application of additive manufacturing to create 3D-printed concrete houses utilizing mortar-based materials. The analysis delves into civil engineering challenges tied to mortar research for 3D-printed concrete houses, encompassing aspects such as 3D mortar printing concepts, general mix designs, 3D printing machine architecture, and an array of testing procedures, including assessments of flowability, rheology, extrudability, and buildability. The laboratory-scale 3D printing machine employed in this study features a parallel manipulator with a gantry boasting three axes (X, Y, and Z). This prototype exhibits significant potential for scaling up to meet the requirements of large-scale construction projects. Ongoing enhancements to the machine encompass mechanical improvements, incorporating advanced sensor systems, optimization, and augmentations in machine capacity. In conclusion, this research endeavors to shed light on the technical intricacies of 3D mortar printing for construction applications, with a particular emphasis on mix design, machine development, and performance testing.
Ng Hui-Teng, Heah Cheng-Yong, Liew Yun-Ming, Mohd Mustafa Al Bakri Abdullah, Phakkhananan Pakawanit, Ridho Bayuaji, Ng Yong-Sing, Khairunnisa Binti Zulkifly, Ooi Wan-En, Hang Yong-Jie,et al.
Elsevier BV
Boontarika Thongdonphum
International Journal of Geomate
: This research investigates the sedimentation rate for the assessment of sediment accumulation in the cage culture area, Rangsit canal 13 in Thailand’s central province of Pathum Thani. Water and sediment qualitwasre conducted during September 2017 (rainy season) and March 2018 (dry season). The temperatures, dissolved oxygen, and pH ranged between 30.5-31.5 O C, 5.54-7.78 mg L -1 , and 7.7-8.1, respectively. The results revealed that the dissolved oxygen varied from season to season (p ≤ 0.05). The results indicated that the water qualities varied in response to the seasonal variability and were alarmingly higher than Thailand’s minimum threshold for aquaculture. In terms of sediment qualities, variations in water content, total organic matter, and sedimentation rate ranged between 37.4-62.4%, 67.6-97.6 mg g-dry weight -1 , and 438.8-3,768.8 g m -2 day -1 , respectively. The results revealed that water content and total organic matter had no different significance (p>0.05) while sedimentation rates varied significantly (p ≤ 0.05) with seasons. Such levels of total organic matter and sedimentation rate were high in the area, especially in the rainy season. The finding also showed that mass transfer and water inflow in the area, especially in the rainy season, influenced the sediment output in the water system, indicating the adequate sediment input-output balance. The water mass transfer will require consideration for the assessment of sediment accumulation and water resource management in the study area.
Rendy Muhamad Iqbal, Warih Supriadi, R.Y. Perry Burhan, Silvana Dwi Nurherdiana, Ririn Eva Hidayati, Subaer Subaer, Ridho Bayuaji, and Hamzah Fansuri
Komunitas Ilmuwan dan Profesional Muslim Indonesia (KIPMI)
In this study, the geopolymer from fly ash as based-raw material has been examined on the ability of several heavy metal ions immobilization. The fly ash has been provided from PT IPMOMI which firstly analyzed the physical and chemical properties. Fly ash and heavy metals were mixed with an activator base until homogeneous, then cast into a cylindrical shape mold following ASTM C 39-86 and left for 7 days. After that, the geopolymer was characterized by SEM, FTIR, XRD, compressive strength test and TCLP. The diffractogram of PT. IPMOMI fly ash exhibited the existence of mullite, alumina and iron oxide phase, which were suitable with XRF result. From FTIR spectra, the vibration on finger print area appeared indicating the vibration of T-O-T from geopolymer network. The observation revealed that the addition of Pb2+ cations caused microcracking from SEM image and affected the compressive strength of the geopolymer. Sr2+ was an ion that was very easilyleached compared to other three ions, and it caused a weak interaction between Sr2+ and geopolymer network. The higher amount of metal ions into the geopolymer network reduced the compressive strength of geopolymer. Sr2+-geopolymer had a lower compressive strength compared to Pb2+, Cd2+, and Co2+.
R. E. Hidayati, F. S. Faradilla, R. Nurkholifah, Nurlina, R. Bayuaji, D. Hartanto, D. Prasetyoko, and H. Fansuri
AIP Publishing
Khairunnisa Zulkifly, Heah Cheng-Yong, Liew Yun-Ming, Ridho Bayuaji, Mohd Mustafa Al Bakri Abdullah, Shamsul Bin Ahmad, Tomasz Stachowiak, Janusz Szmidla, Joanna Gondro, Bartłomiej Jeż,et al.
MDPI AG
Thermal performance, combustibility, and fire propagation of fly ash-metakaolin (FA-MK) blended geopolymer with the addition of aluminum triphosphate, ATP (Al(H2PO4)3), and monoaluminium phosphate, MAP (AlPO4) were evaluated in this paper. To prepare the geopolymer mix, fly ash and metakaolin with a ratio of 1:1 were added with ATP and MAP in a range of 0–3% by weight. The fire/heat resistance was evaluated by comparing the residual compressive strengths after the elevated temperature exposure. Besides, combustibility and fire propagation tests were conducted to examine the thermal performance and the applicability of the geopolymers as passive fire protection. Experimental results revealed that the blended geopolymers with 1 wt.% of ATP and MAP exhibited higher compressive strength and denser geopolymer matrix than control geopolymers. The effect of ATP and MAP addition was more obvious in unheated geopolymer and little improvement was observed for geopolymer subjected to elevated temperature. ATP and MAP at 3 wt.% did not help in enhancing the elevated-temperature performance of blended geopolymers. Even so, all blended geopolymers, regardless of the addition of ATP and MAP, were regarded as the noncombustible materials with negligible (0–0.1) fire propagation index.
Ong Huey Li, Liew Yun-Ming, Heah Cheng-Yong, Ridho Bayuaji, Mohd Mustafa Al Bakri Abdullah, Foo Kai Loong, Tan Soo Jin, Ng Hui Teng, Marcin Nabiałek, Bartlomiej Jeż,et al.
MDPI AG
The properties of amorphous geopolymer with silica fume addition after heat treatment was rarely reported in the geopolymer field. Geopolymer was prepared by mixing fly ash and alkali activator. The silica fume was added in 2% and 4% by weight. The geopolymer samples were cured at room temperature for 28 days before exposed to an elevated temperature up to 1000 °C. The incorporation of 2% silica fume did not cause significant improvement in the compressive strength of unexposed geopolymer. Higher silica fume content of 4% reduced the compressive strength of the unexposed geopolymer. When subjected to elevated temperature, geopolymer with 2% silica fume retained higher compressive strength at 1000 °C. The addition of silica fume in fly ash geopolymer caused a lower degree of shrinkage and expansion, as compared to geopolymer without the addition of silica fume. Crystalline phases of albite and magnetite were formed in the geopolymer at 1000 °C.
Kuntjoro, Ridho Bayuaji, Tatas, and Mokh Khoiri
Elsevier BV
Abstract It is started from an evaluation of gas pipe protective building at oblique position accross the river bend with high discharge and dynamic flow contained trees, sand sediment, gravels up to boulder. The results of the failure analysis and evaluation on the previous building as follows: The structure is located on incorrect installation it is in oblique position exactly on the sharp curve of the river. The building is in such an alarming condition for the sub grade is eroded, saddle weight and anchor do not work properly due to erosion, upper flow and seepage flow. Gabions do not work properly they are tilted and lifted by the washed away by flood with its drift material. Due to the oblique position accross the river bend, an additional construction will be necessary. This gas pipe requires a protective building to return it to its former condition that is buried in two meters deep. Therefore, a check dam construction is required. Due to the oblique position accross the river bend, an additional construction will be necessary as crib that will direct the flow with such combination of cribs and check dam. The aim and goal of gas pipe protection can be achieved, accordingly. The results of gas pipe protective building evaluation are as follows: All components of the substitute building shall work simultaneously and they are quite reliable as proven by the good physical condition until the building construction is completed and once flood occured. After ones time flooding, the structure stability remains in good condition, does not break, does not slide, and does not roll. The sedimentation is seen at the upstream of the cribs during the construction of main building and afterwards. The main building works properly as required and it is proven by sedimentation that already occurs at the upstream of the check dam.
F S Faradilla, D T Nugroho, R E Hidayati, Nurlina, R Bayuaji, D Hartanto, and H Fansuri
IOP Publishing
Ridho Bayuaji, N S Putri, Liew Yun Ming, and Nurul Aida Mohd Mortar
IOP Publishing
Nur Ahmad Husin
International Journal of Geomate
This paper presents research on geopolymer concrete performance using high calcium fly ash in a chloride environment. The experiment, since there is no specific geopolymer concrete standard up to the present, uses Ordinary Portland Cement concrete standard. Concrete used in chloride environment requires a minimum of 35 MPa concrete strength and maximum water-cement ratio of 0.4. In this study, three compositions of geopolymer concrete were prepared, namely mix-1, mix-2, and mix-3. The mixes were produced by mixing fly ash, alkaline activator, sand, gravel, and water. Sodium metasilicate granular pentahydrate and sodium hydroxide flake were used as the alkali activators. Two percent of sucrose was added to the fly ash for improving geopolymer concrete workability. Geopolymer concrete curing was performed by placing test specimens into a closed plastic box at 2830C room temperature for 7, 14, and 28 days. Workability tests showed that mix-3 had a slump of 227 mm, which was only slightly larger than mix-1 and mix-2. Permeability test showed that the three mixes had almost the same quality at 28 days. Based on resistivity test, mix-3 had the best performance at 7, 14, and 28 days. In term of compressive strength, mix-3 had the highest strength at 7, 14, and 28 days. Furthermore, mix-3 also had the highest pH compared with the other two mixes.
R Bayuaji, D P Dibiantara, R Ilmiah, N A Husin, MS Darmawan, R Buyung, and S Subekti
IOP Publishing
ENNY ZULAIKA, M. A. PRIO UTOMO, N. HIDAYATUL ALAMI, N. DWIANITA KUSWYTASARI, MAYA SHOVITRI, RIDHO BAYUAJI, and ENDRY N. PRASETYO
UNS Solo
Abstract. Zulaika E, Utomo MAP, Alami NH, Kuswytasari ND, Shovitri M, Bayuaji R, Prasetyo EN. 2019. Short communication: The diversity of ureolytic bacteria isolated from limestone in East Java, Indonesia based on amino acid sequences encoded by ureC. Biodiversitas 20: 2316-2320. Ureolytic bacteria isolated from limestone are capable to produce urease enzyme which can breaks down urea into carbonate (CO32), has been utilized for various building material bioremediation and restoration. In this present study, we figured out the diversity and genetic relationship of α sub-unit ureC gene among six ureolytic bacteria (JA1, JB2, JB3, JA4, AK4, and SU1) which were isolated from limestone area in East Java province. PCR was conducted to detect the gene which encoded active site of urease, ureC. Followed by sequences translation using BLAST-X (Basic Local Alignment Search Tool) based on the name and function of formed proteins and then aligned to the conserved domain database. Furthermore, the functions and characters of formed proteins were described. Based on PCR results, all isolates showed 340 bp DNA band which indicate the presence of ureC gene. The results of BLAST-X, JB2 isolates showed 100% similarity with the α sub-unit ureC gene from Lysinibacillus sphaericus B1-CDA (WP_054549252.1). Whereas, JA1 isolates showed 88% similarity (lowest) with the α sub-unit ureC gene from Bacillus cihuensis FJAT-14515 (WP_028391929.1). The present study reveals that ureC phylogeny can be used in order to investigate ureolytic bacteria species which isolated from calcareous area in East Java province.
Muhammad Sigit Darmawan, Ridho Bayuaji, Hidajat Sugihardjo, Nur Ahmad Husin, and Raden Buyung Anugraha Affandhie
MDPI AG
This paper deals with the behavior of a geopolymer concrete beam (GCB) under shear load using high calcium content fly ash (FA). The effect of the marine environment on the shear strength of GCB was considered by curing the specimen in a sea splashing zone for 28 days. Destructive and non-destructive tests were carried out to determine the properties of geopolymer concrete in different curing environments. Geopolymer concretes cured at room temperature showed higher compressive strength, slightly lower porosity, and higher concrete resistivity than that of those cured in sea water. From the loading test of the GCB under shear load, there was no effect of a sea environment on the crack pattern and crack development of the beam. The shear strength of the GCB generally exceeded the predicted shear strength based on the American Concrete Institute (ACI) Code.
Yuyun Tajunnisa
International Journal of Geomate
Alkali-activated materials or geopolymer technology is one of the material innovations that can provide several benefits by reducing the use of Portland cement. The source of precursor materials come from industrial by-products. This study investigated the reliability failure of seven-variation of alkali-activated fly ash/slag/micro-silica mortar (AAM) and one-type of Portland Cement (PC) mortar. Compressive strength test accompanied by acoustic emission is used to characterize cylindrical mortar specimens. Examination of fracture distribution according to stress level until final failure was then performed. The compressive strength of four-type of alkali-activated mortar AAM (AAM-IV, V, VI, and VII) at 14 and 28 days shows a slight strength increase, 61.9 to 63.6 MPa, 62.3 to 65.6 MPa, 64.8 to 68.3 MPa and 63.1 to 63.6 MPa, respectively. The slight increase of AAM compressive strength is caused by high early strength achieved due to the replacement of more than 40 % of fly ash with GGBFS. The presence of more CaO in the AAM mixture accelerates the reaction in early age. By contrast, PC mortar shows significantly strength increases from 55.2 MPa to 69.5 MPa during the same period. Amplitude filters greater than (50dB, 60dB, 70dB and 80 dB) is utilized to investigate the reliability of compressive strength of the mortar by acoustic emission. It was found that filter greater than 60dB is the most suitable filter. Alkali-activated mortars which contain raw material of 42.5% fly ash, 42.5% GGBFS, and 15% micro-silica has the lowest reliability of failure than those of other mortars whereas Portland cement mortar shows the highest reliability of failure than other alkali-activated mortars.
Yuyun Tajunnisa
International Journal of Geomate
This research is to find out the contribution of waste energy utilization in Indonesia as a binding agent of alkali-activated mortar. In a previous study, researchers investigated mortar made from class F fly ash/GGBFS/micro-silica in Japan. The inclusion of GGBFS is to shorten/normalize the setting time and microsilica is to improve mortar performance. This research is then continued by using abundant waste material in Indonesia, namely class C fly ash, by making cubic mortar specimens. Setting time of class C fly ash paste from Indonesia is very fast, in contrast to that of class F fly ash paste from Japan. Sandblasting as abundant waste material in Indonesia is substituted to class C fly ash to lengthen the setting time of paste and to improve standard deviation of a compressive test of mortar specimens. On the other hand, the addition of sandblasting waste has a negative effect, because it reduces a compressive strength of mortar specimens.
R Bayuaji, M S Darmawan, N A Husin, R Banugraha, M Alfi, and M M A B Abdullah
IOP Publishing
Geopolymer concrete is an environmentally friendly concrete. However, the geopolymer binder has a problem with setting time; mainly the composition comprises high calcium fly ash. This study utilized bagasse ash to improve setting time on fly ash-based geopolymer binder. The characterization of bagasse ash was carried out by using chemical and phase analysis, while the morphology characterization was examined by scanning electron microscope (SEM). The setting time test and the compressive strength test used standard ASTM C 191-04 and ASTM C39 / C39M respectively. The compressive strength of the samples determined at 3, 28 and 56 days. The result compared the requirement of the standards.
Ridho Bayuaji and Totok Ruki Biyanto
MDPI AG
No-fines lightweight concrete wall with horizontal reinforcement refers to an alternative material for wall construction with an aim of improving the wall quality towards horizontal loads. This study is focused on artificial neural network (ANN) application to predicting the deflection deformation caused by dynamic loads. The ANN method is able to capture the complex interactions among input/output variables in a system without any knowledge of interaction nature and without any explicit assumption to model form. This paper explains the existing data research, data selection and process of ANN modelling training process and validation. The results of this research show that the deformation can be predicted more accurately, simply and quickly due to the alternating horizontal loads.
R. Bayuaji, M. Sigit Darmawan, N.A. Husin, R.B. Anugraha, A. Budipriyanto, and M.G. Stewart
Elsevier BV
Abstract Chloride attack is the primary cause of corrosion problem of concrete structures operate in marine environment. Therefore, concrete structures operate in such environment cannot escape from this corrosion related problem. This paper describes assessment of a reinforced concrete canal structure of power plant after 20 years of exposure in a marine environment. The work covers visual inspection of the structure, on-site and laboratory tests of the structure, analyses the current structural strength based on the tests, and proposing repair and/or strengthening for weak elements. Strength prediction is carried out using average and worst case scenarios. The strength calculations assuming average case scenario shows that by 2025 all the canal have no strength reduction due to corrosion. Calculation using the worst case scenario shows that all the canal by 2025 still comply with the limits specified in Indonesian Concrete Code, even though their strength has been reduced due to corrosion of the reinforcement.
S Irawan, B I Kinif, and R Bayuaji
IOP Publishing
High solid content in drilling mud may affect its properties and result in uncertainties at downhole condition. It eventually contributes to poor rig operation performance and operating cost. This research focus on developing solid control system that is suit for drilling 12.25-inch hole. The first part discussed the performance of Rate of Penetration (ROP), Equivalent Circulating Density (ECD) and drill string drag while the second part of the research discussed about the effect of solid control system performance to mud properties Plastic Viscosity (PV), Yield Point (YP) and Low-Gravity Solid (LGS). The input parameters were gathered from two different set up of solid control systems that were used in Well A and Well B. The result is mainly based on the performance of original solid control system new design versus old design. Installation of distributor tank and channel the mud to respective shale shakers significantly enhanced the system and operational performance. The ROP at 12.25-inch drilling were improved by 20%. New design improved average the ECD margin by reducing additional pressure exerted using original mud from 4.9% to 2.9%. High ECD margin is not recommended because it can break the weak formation. Mud properties while drilling the 12.25-inch hole section; PV, YP and LGS values were improved by 14 %, 17 % and 25 % respectively. Proper mud flow control and routing system at new develop design of solid control system effectively removed the solid in the drilling fluid. This improvement minimizes the tendency of frequent mud flow, screen mesh plugging and tool wear issue. Mud properties such PV, YP and LGS were maintained with an acceptable mud design envelope.
R Bayuaji, M S Darmawan, M A Rofiq, S E Santoso, and E Hardiyanto
IOP Publishing
Odua Weston Jambi Hotel is an eight-floor hotel and located in a prone to earth-quake area. This building used conventional concrete to its structural beam and column. This research's purpose was to maximize the second-floor's function by modifing its architectural design. Special Moment Resisting Frame System (SMRFS) approach was used in the structural design, referred to SNI 03-2847-2013 dan SNI 1726-2012 and to compensate the needs of a spacious hall without any column in the centre of the hall, so therefore, prestressed concrete plate is used to solve this problem.