ORCID Profile
0000-0002-9254-3306
Current Organisations
RMIT University
,
Universitas Palangka Raya
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Publisher: Faculty of Teacher Training and Education, Universitas Palangka Raya
Date: 30-12-2021
DOI: 10.37304/PARENTAS.V7I2.3812
Abstract: The research was motivated by the lack of student learning outcomes in the material of composing an equivalent force. Student who less actively involved in the learning process, learning group has not been managed well, the student who is good, medium and low receive equal treatment, not to be rewarded for the best student, good and lowest. The good student very extremely rare to help the weaker students. This research makes use of the quantitative method research and models of type STAD cooperative learning with population student of X technic of building construction sanitation and treatment as many as 28 people. Formulation of the problem in this study is how the application of models of type STAD cooperative learning can improve learning outcomes the material of composing an equivalent force and how the response of student in grade at class X technic of building construction sanitation and treatment SMK Negeri 1 Palangka Raya year 2017/2018. Succesful implementation of type STAD cooperative learning models in the material of composing an equivalent force is to know to an increase and decrease in class X technic of building construction sanitation and treatment of the prior action is pre-test to post-test. In the prior action, the student who can achieve the minimum of criteria competition (KKM) as many as 0 (0%) people with average value are 36.79. At LKS execution in a group, the student who is can achieve the minimum of competition as many as 28(100%) people with the average value is 75,34. At the postest after, students who are complete as many as 15(53.57%) with the average value is 59.88 and completeness level is 53.57%. In a totality value, the student who is complete as many as 15(53.57%) with average value is 65.37 and completeness classical is 53.57%. Although the thoroughness of student increased from the prior action to the finish value or after action, the classical or the overall student learning outcomes have not reached 85% KKM set at 70, on an in idual basis there is some student who does not complete. Thus it can be retrieved the conclusion by the application of the model of type STAD cooperative learning can improve learning outcomes in class X technic of building construction sanitation and treatment SMK Negeri 1 Palangka Raya year 2017/2018
Publisher: IOP Publishing
Date: 02-2020
DOI: 10.1088/1742-6596/1469/1/012025
Abstract: The aim of this research was to study the mechanical properties (compressive strength and splitting-tensile strength) of fly ash-based geopolymer concrete using variation in the maximum size of coarse aggregate. The mode of study was laboratory research. Fly ash obtained from Asam-Asam Steam Power Plant, South Kalimantan, Indonesia. The maximum size of coarse aggregate was 10 mm, 20 mm and 30 mm. The geopolymer concrete proportion ided into 3 different mixtures and each contained 400 kg/m3 of fly ash. The alkaline activator used as sodium silicate and 10M sodium hydroxide in the ratio 2:1. The ratio of alkaline activator to fly ash was 0.4. Cylindrical specimens (size 100 mm x 200 mm) counted 10 pieces for each mixture proportion and cured at ambient condition. The test result showed that average of compressive strengths and splitting-tensile strengths for specimens with 10 mm, 20 mm, and 30 mm maximum size of aggregate at the age of 21 days were 11.04 MPa and 6.12 MPa, 10.82 MPa and 5.22 MPa, 10.06 MPa and 4.84 MPa respectively. In conclusion, the greater the maximum size of coarse aggregate, the smaller the value of compressive strength and splitting-tensile strength.
Publisher: Elsevier BV
Date: 09-2017
Publisher: Faculty of Teacher Training and Education, Universitas Palangka Raya
Date: 20-12-2019
DOI: 10.37304/BALANGA.V7I2.1542
Abstract: This study aimed to determine the influence of peat water on the mechanical properties of the paving block (compressive strength and water absorption) using coconut shell waste and fly ash as raw material. The background of the research were the lack utilization of fly ash, preparation for the handling and utilization of fly ash from power station at Pulang Pisau and Tumbang Kajuei (under construction), and the utilization of coconut shell to be more effective and economical. Paving block specimens were immersed in peat water to determine the effect of peat water and the rest were immersed in plain water. This experiment used fly ash as a partial replacement of cement and 2% coconut shell as a partial replacement of fine aggregate. The results of the analysis showed that: (a) Paving block using fly ash and coconut shells which were immersed in plain water experienced the increase in compressive strength and the decrease in water (b) Paving block using fly ash and coconut shells soaked in peat water showed that by the increase of age, compressive strength was decrease and water absorption was increase (c) The compressive strength of paving block specimens immersed in plain water and peat water showed relatively similar values at 7 and 28 days age, (d). Water absorption in paving block specimens soaked both in plain water and peat water showed relatively similar values at 7 days age, but at 28 days age the specimens immersed in peat water had greater water absorption.
Publisher: Springer Science and Business Media LLC
Date: 11-08-2022
Publisher: Elsevier BV
Date: 09-2022
Publisher: Elsevier BV
Date: 10-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 09-2023
Publisher: EDP Sciences
Date: 2022
DOI: 10.1051/MATECCONF/202236402003
Abstract: The durability of concrete has a profound impact on the service life of structural elements. Indonesia has extensive peat soils, which provide a highly aggressive environment for concrete structures. Geopolymer concrete has demonstrated good durability when exposed to acid /sulphate conditions similar to those encountered in peat soils. This paper investigates the performance of geopolymer concretes produced using Indonesian type F fly ash under sulphate and acid chemical attack. Geopolymer concrete specimens have been exposed for 12-months in a range of solutions: 5% sodium sulphate, 5% magnesium sulphate, 1% and 3% sulphuric acid, and simulated peat solution. The mechanical and durability properties of specimens together with a control concrete have been monitored for compressive strength, change in mass, water absorption and volume of permeable voids, ultra pulse velocity, air and water permeability, pH profile, and microstructural analysis (XRD, SEM/EDS). The control immersed in water achieved 56.93 MPa at 12-months of age. Magnesium sulphate exposure had a significant deterioration impact on the compressive strength of geopolymer concrete, demonstrating an 11% reduction in strength, while those exposed to sodium sulphate had an 8.9% increase in strength. Specimens exposed to peat solution displayed a slightly increased strength and those in acid conditions a 1.2% and 4.5% decrease in 1% acid and 3% acid, respectively. In general, the geopolymer concrete displayed a high level of resistance against sodium sulphate, 1% sulphuric acid and simulated peat attack.
Publisher: Faculty of Teacher Training and Education, Universitas Palangka Raya
Date: 20-06-2019
DOI: 10.37304/BALANGA.V7I1.552
Abstract: This community service aimed to equip participants with the skills needed in entrepreneurial ability. By transferring the knowledge for students in the Building Engineering Education Study Program, it was expected that the participants will be more skilled in carrying out planning, supervision, and construction implementation. The module provided the skill on preparation of the bill of quantity for building construction. The community service was held in the Building Engineering Education Study Program FKIP UPR from August 2019 to November 2019. The training methods used were lectures with presentation techniques, guided hands-on practice and evaluation. The output were an increase in participant skills, training module, final report and publication in scientific journals. Activities run smoothly, participants were present according to the target. The participants were able to (1) knowing the initial concept of forming and compiling bill of quantity. (2) analyzing the quantity (3) calculating the number of labor and material needs based on Permenkeu and Indonesian Standard, (4) Participants are able to use Microsoft Excel as a tool in making the bill of quantity.
Publisher: IOP Publishing
Date: 04-2023
DOI: 10.1088/1755-1315/1157/1/012024
Abstract: The production of Portland Cement (PC) has been shown to be responsible for 5-8% of global CO2 emissions. This has led to class F fly ash based geopolymer concrete being developed as a substiture for PC concrete for to reduce these global CO2 emissions. However, research has shown that each fly ash has unique characteristics and requires a specific mix design for each fly ash. This is can occupy a significant amount of time. Furthermore, before the mix can be adopted for commercial application it requires the long-term durability to be established. This gap is one of the primary limitations delaying the adoption of geopolymer concrete. While each fly ash is unique, they do have common characteristics which can be utilized to optimise the mix design process. Geopolymers are also known to have good durability characteristics, in particular for acid and sulphate exposure. This paper reports the mix design optimisation process for six class F fly ashes from Australia, Sri Lanka and Indonesia. The strength properties and durability performance of the optimised mixes is reported including the compressive strength development, chloride and carbonation resistance together with performance when exposed to sulphate and acidic media for the Indonesian fly ash, including to a simulated peat soil designed to replicate the conditions experienced in Indonesia.
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