Hari Hariyadi
Mataram University, Dept. of Civil Engineering, Faculty Member
- Concrete Technology and Concrete Structures, Reinforced concrete and bonding, 3d Finite Element Modelling Of Bond-Slip Between Rebar And Concrete In Pull-Out Test, Reinforced Concrete Structures, Reinforced concrete, Fiber Reinforced Concrete, and 30 moreSelf Compacting Concrete, 2. Strengthening of Concrete Structures by New Techniques, Structural Engineering, Concrete Technology, Concrete, Construction Technology, Durability of Concrete, Cement and Concrete Materials, Concrete structures, Concrete And Steel design, Service life of concrete structures, Behavior of Concrete Structures Reinforced with FRP Composites, Geopolymer Concrete, High Strength and High Performance Concrete, prestressed Concrete, 4. Improvement of Ductility of High Strength Reinforced Concrete Elements, Precast Concrete, Precast Concrete Connection Design, Precast Concrete Structures, Precast prestressed concrete, Precast Concrete Systems, Reinforced and Prestressed Concrete, Civil Engineering, Seismic Retrofit, FIBRE REINFORCED CONCRETE, 3. Study the Behavior of Reinforced Concrete Elements Incorporating Different Waste Materials, Lightweight Concrete, Bond Strength, Composite structures, and Steel Concrete composite structuresedit
During the building construction procedure, there are a variety of high-risk factors. So as to have a negative impact on the project's productivity, performance, quality, and cost constraints. This study seeks to determine the project... more
During the building construction procedure, there are a variety of high-risk factors. So as to have a negative impact on the project's productivity, performance, quality, and cost constraints. This study seeks to determine the project implementation risk factors, identify the most significant risks, and conduct risk assessments to anticipate all types of risk. This qualitative study employs a questionnaire, and the analysis is conducted by ranking the risk factors from most significant to least significant. SPSS was utilized to conduct a validity and reliability test on the questionnaire. From the results of the data analysis, it was determined that there were nine risk factor variables; the most influential risk was the quality of concrete that did not meet the specifications, with an average value of 3.87, and the risk with the highest risk category was erratic weather.
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Kabupaten Lombok Utara (KLU) merupakan daerah yang paling parah kerusakan rumah tinggal, sarana dan prasarana umum saat terjadi gempa Lombok tahun 2018 lalu. Sebagian besar korban jiwa dari KLU diakibatkan oleh terkena rerutuhan bangunan... more
Kabupaten Lombok Utara (KLU) merupakan daerah yang paling parah kerusakan rumah tinggal, sarana dan prasarana umum saat terjadi gempa Lombok tahun 2018 lalu. Sebagian besar korban jiwa dari KLU diakibatkan oleh terkena rerutuhan bangunan yang roboh akibat gempa bumi yang intensitasnya mencapi 6,9 Skala Richter saat itu yang disusul oleh gempa utama dengan intensitas yang hampir sama. Oleh karena itu perlu dilakukan usaha terhadap masayarakat setempat khususnya Desa Sokong, Kecamatan Tanjung KLU untuk meningkatkatkan pemahaman dan kesadaran tentang pentingnya membangun rumah atau fasilitas umum yang mengikuti kaidah bangunan tahan gempa. Metode yang dilakukan adalah metode ceramah dan diskusi dengan visualisasi yang nyata dan menarik dari video serta praktek langsung khususnya dalam merangkai besi tulangan beton untuk suatu konstruksi rumah tembokan sederhana. Peserta workshop sangat antusias mengikuti bimbingan teknis dari tim pengabdian Fakultas Teknik Universitas Mataram dan berko...
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Currently, due to the low production of eggs in Nusa Tenggara Barat Province, most eggs on the market are brought in from other region. Despite it’s huge population, representing 24,6% population of Nusa Tenggara Barat, East Lombok could... more
Currently, due to the low production of eggs in Nusa Tenggara Barat Province, most eggs on the market are brought in from other region. Despite it’s huge population, representing 24,6% population of Nusa Tenggara Barat, East Lombok could supply 2% of market demand at most. The high cost of chicken coop construction is one of the main reasons of this low production. Meanwhile, Bamboo is abundant in East Lombok, it’s thrive along Tojang River Bank. Bamboo could be use as substitute material for battery cages. Cost production of battery cages from bamboo is relatively lower than the one made from hardwood, steel, light steel, and baton. Considering accessible substitute materials at lower price are available, the cost production could be reduced. This community service is aiming for local community cognition of local bamboo as low priced material. This community service is implemented by discourse, which done by a number of survey, survey of the community service location, and discour...
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When wood structures are exposed to high temperatures, they will decompose to provide a char layer and pyrolysis zone, an insulating material that inhibits further degradation. This experimental study aims to determine the char thickness... more
When wood structures are exposed to high temperatures, they will decompose to provide a char layer and pyrolysis zone, an insulating material that inhibits further degradation. This experimental study aims to determine the char thickness and pyrolysis of solid wood exposed to fire for 30, 45, and 60 minutes. The post-fire shear strength has also been evaluated. The solid woods were locally from Nusa Tenggara Island, namely Jati Putih, Bajur, and Rajumas. According to the Indonesian National Standard of the heating curve for structures, the temperature growth was SNI-1741: 2008. Obtained The char layer's highest average thickness was within 60 minutes of combustion with the highest temperature of 1055oC. The char layer for Jati Putih, Bajur, and Rajumas are 2.12 mm, 7.89 mm, and 6.53 mm. Meanwhile, the pyrolysis layers are 8.78 mm, 9.13 mm, and 14.82 mm, respectively, for Jati Putih, Bajur, and Rajumas. Besides, the post-fire shear strength of all wood species shows an increase i...
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The design of pull-out strength of anchor bolt in concrete is generally based on standards which are assumed to have a single crack failure and the uniform stress. However, in real phenomenon these assumptions are not reliable and a... more
The design of pull-out strength of anchor bolt in concrete is generally based on standards which are assumed to have a single crack failure and the uniform stress. However, in real phenomenon these assumptions are not reliable and a combination of failure modes between the cone and bond failure is commonly found. This research was conducted to analyze the failure mechanism and the strength of the anchor bolt under static pull-out load. Normal strength of concrete-mortar block and the shallow depth of anchor bolt was used in this research. The failure mode, reaction force, and concrete cone stress will be discussed and compared to the design standards. The experimental results clearly show that a combination failure mode between the cone and bond failure of anchor bolt was found, consequently the depth of the cone failure part reduced and the angle of cone slope narrowed. The cone stress and loading capacity of the experimental result is extremely lower than the design standards, which is around a half. Therefore a certain safety factor is required to guarantee the safety of anchor bolt structures.
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High porosity, low modulus of elasticity, and adequate strength are the main requirements of the concrete structures as an impact energy absorber. The development of porous concrete mainly focuses on increasing the porosity rather than... more
High porosity, low modulus of elasticity, and adequate strength are the main requirements of the concrete structures as an impact energy absorber. The development of porous concrete mainly focuses on increasing the porosity rather than the strength due to many advantages can be gained when having higher porosity. Consideration to the environmental problem has been a concern recently, therefore utilization of a waste material as construction materials has been spreading widely. Volcanic pumice as one of waste materials having a high porosity can possibly be utilized as an aggregate replacement material on porous concrete to improve its porosity without much reducing the strength. The purpose of this research is to evaluate the effect of varying proportion of volcanic pumice as an aggregate replacement (VP/A) and proportion of aggregate to cement (A/C) with a constant water to cement ratio (WCR) to the mechanical properties of volcanic pumice porous concrete, and to those porous concrete with normal aggregate as a control. The result shows that by using volcanic pumice the porosity increases and the modulus of elasticity decreases, even though slightly decreasing in strength is also found. However, it showed a possibility of volcanic pumice porous concrete as impact energy absorber structures. This research is a preliminary study which is expected to be developed for future research related to the dynamic and impact test. In addition, ACI 318-08 developed equation (Ec = 0.043W 1.5 f'c 0.5) can be used to rapidly estimate the modulus of elasticity of porous concrete, where it is necessary, due to experimental difficulties to measure it.