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COMPRESSIVE STRENGTH AND SPLITING-TENSILE STRENGTH OF GEOPOLYMER CONCRETE USING VARIATION IN MAXIMUM SIZE OF COARSE AGGREGATE noor arif inderawan; Yulin Patrisia
PARENTAS: Jurnal Mahasiswa Pendidikan Teknologi dan Kejuruan Vol. 3 No. 1 (2017): Journal Parentas Edisi Januari-Juni 2017
Publisher : Jurusan Pendidikan Teknologi Dan Kejuruan

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Abstract

The purpose of this research is to study the mechanical behavior of geopolymer concrete using the variation in maximum size of coarse aggregate in the term of compressive strength and splitting-tensile strength. This study used variation on maximum size of course aggregate namely 10 mm, 20 mm and 30 mm. Fly ash is from AsamAsam Steam Electricity Power Plant, Indonesia. Cylindrical test specimen (size 100 mm x 200 mm) with number of test specimens counted 10 pieces for each variant of maximum size of aggregate coarse. The mixture of geopolymer concrete in this experiment contain fly ash of 400 kg/m3 with alkaline activator is Sodium Hydroxide (NaOH) with molarity of 10 M and Sodium Silicate (Na2SiO3). The ratio of Na2SiO3 to NaOH is 2:1 and the ratio of alkaline activator to fly ash is 0.4. Tests conducted for compressive strength test and tensile strength at age 14 and 21 day. The result shows that the smaller the maximum size of coarse aggregate, the greater compressive strength and splitting-tensile strength. Compressive strength and splitting-tensile strength for specimen with 10 mm, 20 mm, and 30 mm maximum size of aggregate are 11.04 MPa and 6.12 MPa, 10.82 MPa and 5.22 MP, 10.06 MPa and 4.84 MPa respectively.
THE APPLICATION OF COOPERATIVE LEARNING MODEL OF TYPE STUDENT TEAM ACHIEVEMENT DIVISIONS (STAD) ON THE MATERIAL OF COMPOSING AN EQUIVALENT FORCE AT CLASS X TECHNIC OF BUILDING CONSTRUCTION SANITATION AND TREATMENT SMK NEGERI 1 PALANGKA RAYA Shelin Suciana; Yulin Patrisia
PARENTAS: Jurnal Mahasiswa Pendidikan Teknologi dan Kejuruan Vol. 7 No. 2 (2021): Journal Parentas Edisi juli-Desember 2021
Publisher : Jurusan Pendidikan Teknologi Dan Kejuruan

Show Abstract | Download Original | Original Source | Check in Google Scholar | 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 individual 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