MECHANICAL PERFORMANCE OF CELLULAR LIGHTWEIGHT CONCRETE USING FLY ASH AS PARTIAL CEMENT REPLACEMENT Reni Suryanita International Journal of Geomate, 2026 Cellular Lightweight Concrete (CLC) is widely recognised for its low density and good thermal insulation performance; however, its relatively low compressive strength limits broader engineering applications. This study investigates the effect of fly ash as a partial cement replacement on the physical and mechanical properties of CLC mortar. CLC specimens were prepared with fly ash replacement levels of 0%, 10%, and 15% by mass of cement using a protein-based foaming agent. The specimens were tested at curing ages of 7, 14, 28, and 56 days to evaluate density, compressive strength, and deformation behaviour. The experimental results show that the incorporation of fly ash significantly influences the strength development of CLC. The 10% fly ash mixture achieved the highest compressive strength of 0.960 MPa at 56 days, exceeding both the control mixture (0.852 MPa) and the 15% fly ash mixture (0.720 MPa). The improvement in strength at the 10% replacement level is attributed to enhanced pozzolanic reactions and improved matrix densification, resulting in a more uniform pore structure. In contrast, a higher replacement level of 15% led to reduced strength development, likely due to dilution of the cementitious content and delayed hydration. Within the investigated range, a 10% fly ash replacement provides an optimal balance between compressive strength and density, indicating its suitability for non-structural to semi-structural lightweight applications. The findings demonstrate the potential of fly ash-based CLC as a more sustainable construction material by reducing cement consumption while maintaining acceptable mechanical performance.
TOWARDS RESILIENT URBAN FUTURES: LAND USE CHANGE, FLOOD RISK, AND THE ROLE OF SUSTAINABLE DRAINAGE SYSTEMS IN KUANTAN TENGAH DISTRICT Chitra Hermawan, Reni Suryanita, Aras Mulyadi, Yohannes Firzal, Mohd Zamri Jusoh, Mardalisa Mardalisa Indonesian Journal of Urban and Environmental Technology, 2025 Sustainable Urban Drainage Systems (SUDS) are considered an innovative approach to urban water management, but their application in Indonesia is still very limited. Aim: This study was aimed to analyze the impact of land use change on runoff coefficient and its implication for socio-economic resilience in post-flood conditions in Kuantan Tengah District, Riau Province. Methodology and results: The research applied a spatial-hydrological and socio-economic approach, integrating drone imagery, GIS-based land classification, runoff coefficient analysis, field drainage assessment, and community surveys. Results revealed that the average runoff coefficient (Cr) increased to 0.57 due to land conversion into impervious surfaces, especially residential and road areas. This condition led to inadequate drainage capacity and contributed to urban flooding. Socio-economic impacts identified include infrastructure damage, income loss in local businesses, health problems, and psychological stress. SWOT analysis highlighted institutional strengths and public awareness, but also emphasized weak ecosystem-based management. Conclusion, significance and impact study: A Sustainable Urban Drainage System (SUDS) model was proposed to overcome these challenges, combining green infrastructure, zoning policy, SOP (standard operating procedures) for drainage maintenance, and community participation. This study provides a novel integrative framework for urban flood risk mitigation based on hydrological and socio-economic indicators and offers policy insights for sustainable spatial planning in flood-prone regions. The solutions offered directly support several Sustainable Development Goals (SDGs), particularly SDG 11 on Sustainable Cities and Communities, SDG 6 on Clean Water and Sanitation, and SDG 13 on Climate Action.
Characteristics of exterior emulsion paint using natural rubber latex binder Bahruddin, Arya Wiranata, Zuchra Helwani, Jahrizal, Yohanes Firzal South African Journal of Chemical Engineering, 2025 • Modification of natural rubber latex with acrylic resin grafting method to improve the physical properties of natural rubber latex. • Development of new technology of natural rubber latex as a binder of water-based emulsion paint. • Natural rubber latex modified with acrylic resin can be applied as a high-performance binder for exterior emulsion paint. • Exterior paint using binder based on natural rubber latex modified with acrylic resin has scrub and abrasion resistance up to 2400 cycles at a binder content of 18%. Exterior paint protects buildings or infrastructures against weather conditions, contaminants, or other things that can degrade the building. Water-based exterior wall paint development currently uses acrylic-based binders with high adhesion, abrasion resistance, heat resistance and good weather. The combination of acrylic with natural rubber latex is expected to be a solution to improve the performance of natural rubber latex as an exterior paint binder to improve adhesion, cohesion, tensile strength, tear strength, modulus, and weather resistance. Natural rubber latex is modified by grafting acrylic resin into it. This method begins with mixing additives such as benzoyl peroxide, Sodium Lauryl Sulfate (SLS), Ethylenediaminetetraacetic Acid Disodium Salt (EDTA 2 Na), Sodium sulfite and Polypropylene glycol into natural rubber latex with operating conditions at a temperature of 85 °C for 60 min. The natural rubber latex binder was then mixed into the exterior paint base, and characterization was carried out using Fourier transform infrared (FT-IR) spectroscopy, scrub, abrasion test, opacity, contact angle, and scanning electron microscope (SEM). The test results showed that acrylic resin improved the performance of natural rubber latex-based paint as the acrylic resin content in the natural rubber latex increased. The best results were obtained on natural rubber latex grafted with acrylic resin at a ratio of 50:50 (NRL-AR (50:50)) with scrub and abrasion values reaching 2400 cycles at a binder content of 18%, pigment volume concentration (PVC) 50% and a contact angle of 76°. Meanwhile, the scanning electron microscope (SEM) images showed that the acrylic resin-modified natural rubber latex binder did not agglomerate, and the distribution of paint components was better.
ENVIRONMENTAL COMMUNICATION BASED ON LOCAL WISDOM IN FOREST CONSERVATION: A STUDY ON SENTAJO FORBIDDEN FOREST, INDONESIA Yasir Yasir, Yohannes Firzal, Chelsy Yesicha, Andri Sulistyani Journal of Landscape Ecology Czech Republic, 2022 This study aims to explore environmental communication based on local wisdom in conserving forests in the Kenegerian Sentajo, Riau Province, Indonesia. This study uses a qualitative approach with an interactive model. Researchers interact and are directly involved in many community activities. The results indicate that environmental communication in forest conservation is based on the local wisdom of the community by using the term Rimbo Larangan. The main communicators and actors are the customary holders, the datuk penghulu and the ninik-mamak (elders) as the highest institutional holders of Kenegerian Sentajo customs. This institution is more powerful than formal government institutions. These traditional stakeholders play an important role in spreading the message to maintain the existence of forbidden forest (Rimbo Larangan). In addition, the community’s desire to maintain customary values has given rise to attitudes and behaviors of people who are aware and care about forest sustainability. This is supported by Islamic values which have encouraged public awareness to have morals or responsibility towards the environment. Some beliefs, storytelling, and myths also reinforce this rule which makes people afraid to break it. The research findings can be used by the community in improving practices of communicating, managing, making rules and redesigning forest for conservation areas that are managed based on indigenous peoples.
Experimental study on performance of cellular lightweight concrete due to exposure high temperature Reni Suryanita International Journal of Geomate, 2021 Generally, making the building load lighter is to use lightweight concrete on wall components. Cellular Lightweight Concrete (CLC) is lighter than red-bricks because CLC contains pores. Changes in temperature due to building fires impact the characteristics and performance of CLC, especially in density, compressive strength, and visual shape of CLC. The research aims to analyze the performance of CLC; compressive strength and appearance of CLC surfaces after exposure to high temperatures. CLC sample is the block with size 60 cm length, 10 cm width, and 20 cm height. Variation of temperature exposure time is 10 minutes, 20 minutes, 30 minutes and 40 minutes. CLC is placed close to traditional brick kilns with an average surface temperature of 370 degrees Celsius along 40 minutes of combustion. The CLC block compressive strength value due to exposure to high temperatures for 40 minutes is 0.3 MPa. The compressive strength of CLC after exposure to high temperatures decreases by 42.3% compared to CLC at room temperature. Whereas, the visual form on the surface of CLC gives rise to a blackish grey colour resulting from exposure to high temperatures. This study indicated that the dry and cracked surface texture on CLC has caused a decrease in the performance includes density and compressive strength of CLC. Therefore, CLC needs to maintain after being exposed to high temperatures by providing an additional layer on the CLC surface.
Damage prediction of the steel arch bridge model based on artificial neural network method Widya Apriani International Journal of Geomate, 2021 Failure in the advance prediction of bridge structure collapse requires an enormous cost of rehabilitation. In most cases, the projection of decreases or damage to the structure due to difficulty in the testing condition. Therefore, this study analyses the damage and identification of the critical structural components' severity on the steel girder arch bridge. Using the Artificial Neural Networks (ANNs), this research has tested a parametric steel girder arch bridge. The numerical model of the 146 supported girder has analysed by epoch 500 values of ANNSs's parameter. The stiffness of 10th element is assumed to drop 10%, 20%, 30%, and 40% of whole the tested. The architecture model of ANNs was three neurons in the input layer, five neurons in the hidden layer and one neuron in the output layer. The simulation of the data set were 90:10, 80:20, 70:30, and 50:50. ANNs shows the damage' severity in this the stiffness reduction tested by applying the damage index methods. In this research, the ANNs' simulation has been reliable to predict 98% for identifying structural damage. Thus, the results confirm the feasibility of the technique and its application in predicting structural failure.
ARCHITECTURAL PHOTOGRAMMETRY: A LOW-COST IMAGE ACQUISITION METHOD IN DOCUMENTING BUILT ENVIRONMENT Yohannes Firzal International Journal of Geomate, 2021 Architectural photogrammetry, as a digital survey method requires photographic images produced by using a precision camera. This method, particularly the close-range photogrammetry, has been more effectively used than other techniques such as laser scanning. This paper aims to show that the close-range photogrammetry is a practical way and low-cost image acquisition in architectural projects. By applying a sequential two-step process method, capturing images in the field and using photogrammetry software has conducted to generate from the point cloud to the architectural model. This model shows a high level of accuracy detail from a part of the Sewu Temple Indonesia, where this research has conducted. Thus, this research concludes that using architectural photogrammetry is to obtain accuracy detail of architecture object in complex nature and as a low cost and effective methods.
Penta helix communication model through community based tourism (CBT) for tourism village development in Koto Sentajo, Riau, Indonesia Yasir YASIR, , Yohannes FIRZAL, Andri SULISTYANI, Chelsy YESICHA, , , and Geojournal of Tourism and Geosites, 2021 This study aims to explain the higher education institution's role in developing Koto Sentajo as tourism village and to understand the tourism communication model that synergizes with other stakeholders. This study uses a qualitative approach that emphasizes more on depth. The method describing is done by the reality that occurs by interacting directly with the research subject. The results showed that higher education institutions have an essential role in developing a tourism village development model. This communication model is useful for attracting local governments and other stakeholders to establish the Koto Sentajo tourism village. The penta helix communication model involves five main actors, namely the campus, corporate CSR, the community, the mass media, and the Kuantan Singingi regency's local government, to develop the tourism village. The communication and collaboration between stakeholders in empowering the community can accelerate the Koto Sentajo tourism village's realization as a leading cultural heritage destination.
Expressing Marginal Identity through Living House Yohannes Firzal Journal of Physics Conference Series, 2020 Abstract As landed-sea gipsy, Akit people recognized as an ethnic group who are trying to adopt some different cultures and traditions in their daily life. In the adopting process, the people are settled down on a coastal area of an island, or at river’s estuary compound. This process has seen as a way to ensure preserving their sea life tradition and also to adopt land traditions at the same time. Through field survey and in-depth interviews method, this paper shows how most Akit people at the Rupat Island foster Chinese culture in their daily life, including on their house. The house is not only to show their marginal cultural identity but also to express the influence of the Chinese-side that can be seen both on their traditional and contemporary home. This paper confirms that the living house of Akit people has found as a form of compromising cultural life in expressing their today’s identity.
Study of User's Response on the Pedestrian Bridge in Pekanbaru City Yulia Rahmawati, Yohannes Firzal Journal of Physics Conference Series, 2020 Abstract A pedestrian bridge in urban areas exists not only to overcome crossing between people and vehicle but also gives a sense of security and comfort for its users. With a variety of user characteristics, the bridge has also used for other informal purposes. This phenomenon becomes interesting to study how the users respond to the various uses of the bridge. By using accidental sampling method for one hundred respondents, the field data has analysed in a simple linear regression model with data processing software. The result shows the safety, security, comfort, continuity and attractiveness are the primary considerations of users in utilizing the pedestrian bridge. Even though the physical condition has found less-expected, the user's response has generally categorized as sufficient.
MECHANICAL PERFORMANCE OF CELLULAR LIGHTWEIGHT CONCRETE USING FLY ASH AS PARTIAL CEMENT REPLACEMENT R Suryanita, Y Firzal, H Maizir, RA Harnedi GEOMATE Journal 30 (140), 148-155 , 2026 2026
Penerapan Healthy dan Efisiensi Sumber Daya pada Perancangan Kamar Sewa Eksklusif di Pekanbaru AZ Amelia, Y Firzal, MD Susilawaty Tekstur (Jurnal Arsitektur) 6 (2), 235-244 , 2025 2025
Improving Village Information Systems through Aerial Mappingfor Simpang Ayam Village, Bengkalis District, Bengkalis Regency: Peningkatan Sistem Informasi Desa melalui Pemetaan … R Suryanita, H Maizir, R Saily, Y Firzal, Y Roza, Y Olivia Dinamisia: Jurnal Pengabdian Kepada Masyarakat 9 (4), 1258-1265 , 2025 2025
Pendampingan Sumber Daya Manusia dalam Perencanaan dan Pengelolaan Desa Wisata di Desa Empat Balai, Kabupaten Kampar, Provinsi Riau N Helen, Y Firzal, MD Susilawaty, MA Al Husaini, OP Dewi, LD Annisa, ... Jurnal Pengabdian Masyarakat Inovasi Indonesia 3 (3), 219-224 , 2025 2025
Pemetaan Potensi Ekonomi Desa Simpang Ayam Kabupaten Bengkalis melalui Pemotretan Udara R Suryanita, H Maizir, R Saily, Y Firzal, Y Roza, Y Olivia JCOMMITS: Journal of Community Empowerment, Inovation, and sustainability 3 … , 2025 2025
Characteristics of exterior emulsion paint using natural rubber latex binder A Wiranata, Z Helwani, Y Firzal South African Journal of Chemical Engineering 52 (1), 151-159 , 2025 2025 Citations: 3
Disaster Risk Management for Siak Cultural Heritage Area, Indonesia Y Firzal UNESCO Chair Programme on Cultural Heritage and Risk Management 18, 84-89 , 2025 2025
URBAN MAPPING FOR SPATIAL KNOWLEDGE: SPATIAL BUILDING CONFIGURATION IN BAGANSIAPIAPI–A PRELIMINARY STUDY N Helen, Y Firzal, RL Suryani INTERNATIONAL SEMINAR 6, 161-170 , 2024 2024
Mapping the Economic Potential of the Community of Teluk Latak Village, Bengkalis District, Bengkalis Regency through an MSMEs: Pemetaan Potensi Ekonomi Masyarakat Desa Teluk … R Suryanita, RA Harnedi, Y Firzal, BHR Putra, Y Roza, P Nurmayanti, ... Dinamisia: Jurnal Pengabdian Kepada Masyarakat 8 (3), 824-832 , 2024 2024 Citations: 3
Unmanned Aerial Vehicle (UAV) Photogrammetry for Heritage Building Documentation WB Putra, G Faisal, NIK Dewi, Y Firzal Int. J. Environ. Archit. Soc 3 (02), 72-86 , 2023 2023 Citations: 3
Sampah Dan Masyarakat Perkotaan Studi Tentang Pengelolaan Sampah di Kecamatan Tampan Kota Pekanbaru Provinsi Riau M Mardatillah, Y Yusuf, Y Firzal Jurnal Zona 7 (1), 89-94 , 2023 2023
Typology of Malay Traditional Building Construction Case Study: Bawi Malay House In Kampung Empat Balai, Kampar I Kuswoyo, Y Firzal, P Aldy, RL Suryani, M Saspriatnadi, MA Al Husaini JHSS (JOURNAL OF HUMANITIES AND SOCIAL STUDIES) 7 (1), 102-105 , 2023 2023 Citations: 2
Teluk Latak Village Information System, Bengkalis District, Bengkalis Regency Through Aerial Mapping: Sistem Informasi Desa Teluk Latak Kecamatan Bengkalis Kabupaten Bengkalis … R Suryanita, Y Firzal, BH Rhoma, Y Roza, H Maizir Dinamisia: Jurnal Pengabdian Kepada Masyarakat 7 (1), 202-208 , 2023 2023 Citations: 3
Penerapan Arsitektur Dekonstruksi pada Perancangan Pusat Kreativitas Seni Media Baru di Pekanbaru MP Hartadinata, Y Firzal, G Faisal JAUR (JOURNAL OF ARCHITECTURE AND URBANISM RESEARCH) 6 (1), 1-8 , 2022 2022
Environmental communication based on local wisdom in forest conservation: A study on Sentajo forbidden forest, Indonesia Y Yasir, Y Firzal, C Yesicha, A Sulistyani Journal of Landscape Ecology (Czech Republic) 15 (2), 127-145 , 2022 2022 Citations: 30
Strengthening the Socio-Economic Potential of Teluk Latak Village as an Independent Village on the Coast of Bengkalis Island R Suryanita, Y Firzal, G Meiwanda, Y Alwinda, H Maizir ABDIMAS: Jurnal Pengabdian Masyarakat 5 (1), 1616-1621 , 2022 2022 Citations: 1
APPLICATION OF FOLDING ARCHITECTURE AT HALLYU CENTER IN PEKANBARU T Manalu, M Rijal, Y Firzal JAUR (JOURNAL OF ARCHITECTURE AND URBANISM RESEARCH) 5 (2), 103-113 , 2022 2022
Pusat Pecinta Kucing di Pekanbaru dengan Pendekatan Arsitektur Ekspresionis MM Hadiwijaya, Y Firzal, P Aldy JAUR (Journal of Architecture and Urbanism Research) 5 (2), 177-187 , 2022 2022 Citations: 5
Penerapan Pendekatan Arsitektur Edukatif pada Perancangan Petroleum Museum di Pekanbaru EN Rita, Y Firzal, MD Susilawaty MARKA Media Arsit. Dan Kota J. Ilm. Penelit 5 (2), 101-114 , 2022 2022 Citations: 6
Pemberdayaan masyarakat melalui pengembangan produk Teh Gaharu di Desa Wisata Koto Sentajo Kabupaten Kuantan Singingi Y Yasir, Y Firzal, C Yesicha, A Sulistyani, S Safri Unri Conference Series: Community Engagement 3, 255-263 , 2021 2021 Citations: 4
MOST CITED SCHOLAR PUBLICATIONS
Penta helix communication model through community based tourism (CBT) for tourism village development in Koto Sentajo, Riau, Indonesia Y Yasir, Y Firzal, A Sulistyani, C Yesicha Geo Journal of Tourism and Geosites 37 (3), 851-860 , 2021 2021 Citations: 88
Environmental communication based on local wisdom in forest conservation: A study on Sentajo forbidden forest, Indonesia Y Yasir, Y Firzal, C Yesicha, A Sulistyani Journal of Landscape Ecology (Czech Republic) 15 (2), 127-145 , 2022 2022 Citations: 30
Model konseptual kepemimpinan, gender, dan diversitas P Nurmayanti, E Suryawati, Y Firzal, S Ramaiyanti, Y Maulida Jurnal El-Riyasah 12 (1), 1-25 , 2021 2021 Citations: 28
Tipologi Bangunan Tua Y Firzal Local Wisdom–Jurnal Ilmiah Online 3 (2) , 2011 2011 Citations: 20
Architectural photogrammetry: a low-cost image acquisition method in documenting built environment Y Firzal GEOMATE Journal 20 (81), 100-105 , 2021 2021 Citations: 19
Cultural significance of the place: The key factor in urban heritage programme Y Firzal, I Temas IOP Conference Series: Earth and Environmental Science 213 (1), 012008 , 2018 2018 Citations: 18
Experimental study on performance of cellular lightweight concrete due to exposure high temperature R Suryanita, Y Firzal, H Maizir, I Mustafa, MFB Arshad GEOMATE Journal 21 (83), 20-27 , 2021 2021 Citations: 17
Reconstructing socio-cultural identity: Malay culture and architecture in Pekanbaru, Indonesia Y FIRZAL Newcastle University , 2015 2015 Citations: 15
Penerapan prinsip desain arsitektur biofilik pada Riau Mitigation and Disaster Management Center M Karima, Y Firzal, G Faisal ARTEKS: Jurnal Teknik Arsitektur 5 (2), 307-316 , 2020 2020 Citations: 13
Arsitektur Melayu: Rumah Tradisional dalam Sketsa dan Lensa G Faisal, Y Firzal UR Press , 2020 2020 Citations: 13
Malay House, an Uniqueness of Architetural Design Form Y Firzal Local Wisdom: Jurnal Ilmiah Kajian Kearifan Lokal (Local Wisdom Scientific … , 2011 2011 Citations: 11
Penerapan prinsip biophilic design pada perancangan apartemen soho di kota pekanbaru MF Kaffah, Y Firzal, MD Susilawaty Jurnal Arsitektur ALUR–Vol 3 (1) , 2020 2020 Citations: 10
Kajian Biomorphic Architecture dalam Perancangan Oceanarium Pekanbaru N Asyifa, Y Firzal, G Faisal Arsitektura: Jurnal Ilmiah Arsitektur dan Lingkungan Binaan 18 (2), 277-290 , 2020 2020 Citations: 9
Study of Vernacular Coastal Architecture: The Construction of Akit’s House in Rupat Island Y Firzal, M Rijal, G Faisal ICST 2016 1 (1) , 2017 2017 Citations: 9
TRANSFORMASI IDENTITAS ARSITEKTUR VERNAKULAR PESISIR: TINJAUAN KASUS PERMUKIMAN SUKU AKIT DI PULAU RUPAT G FAISAL, Y FIRZAL Seminar Nasional Kearifan Lokal dalam Perspektif Global Medan Indonesia 1 (1) , 2017 2017 Citations: 9
Reconstructing socio-cultural identity: Malay culture and architecture in Pekanbaru Y Firzal Indonesia (Doctoral dissertation, Newcastle University) , 2015 2015 Citations: 9
Pemberdayaan Masyarakat Berbasis Community Based Tourism (CBT) dalam Mewujudkan Desa Wisata Y Yasir, Y Firzal, C Yesicha, A Sulistiyani Jurnal Pengabdian Kepada Masyarakat 27 (4), 352-360 , 2021 2021 Citations: 8
Malay Wood Carving: The Godang House at Koto Sentajo G Faisal, Y Firzal, I Kuswoyo Dody , 2019 2019 Citations: 8
Mendefinisikan Kembali Arti Kampung Melayu Y Firzal Jurnal Arsitektur: Arsitektur Melayu dan Lingkungan 2 (1), 13-22 , 2015 2015 Citations: 8
Mall di Kota Dumai dengan Pendekatan Arsitektur Postmodern Metafora SE Pranata, R Amanati, Y Firzal Jurnal Online Mahasiswa Fakultas Teknik Universitas Riau 4 (2), 1-11 , 2017 2017 Citations: 7
