Technology Reports of Kansai University (ISSN: 04532198) is a monthly peer-reviewed and open-access international Journal. It was first built in 1959 and officially in 1975 till now by kansai university, japan. The journal covers all sort of engineering topic, mathematics and physics. Technology Reports of Kansai University (TRKU) was closed access journal until 2017. After that TRKU became open access journal. TRKU is a scopus indexed journal and directly run by faculty of engineering, kansai university.
Technology Reports of Kansai University (ISSN: 04532198) is a peer-reviewed journal. The journal covers all sort of engineering topic as well as mathematics and physics. the journal's scopes are
in the following fields but not limited to:
The volcanic area is blessed with a lot of resources and cursed with eruptive disaster at the same time. Fertile land, deep forest, mining deposit, and water reserve are examples of the potential within a volcanic environment. The more productive activity is taking place, the more it risks damaged by a disaster. In 2010, Merapi, an energetic volcano in Java – Indonesia, erupted on a massive scale equal to one event in one hundred and seventy years. It was estimated up to 140 million m3 lahars produced, overwhelming installed sabo dams with only 20 million m3 in capacity. It damaged these sabo dams severely. Meanwhile, damaged sabo dams urgently needs to be either rehabilitated or reconstructed to set preparation against the next incoming eruption. This paper would focus on the estimation of functional performance given by the sabo dam at present actual condition. The aim is to create modelling framework base on structural equation modelling (SEM) and Generalized Reduced Gradient (GRG) Method. It adopts water resources principles, recent developed model, regulations and factors that influencing this purpose. All governing factors are grouped into three major classifications, i.e. physical aspect, regulative aspect and social aspect. These three aspect are consisted of eight dimension: sabo dam components performance, riparian vegetation condition, river course condition, sand mining performance, regulation conformity, socio-culture-economic, societal-private cooperation, and disaster loss then followed by thity nine indicators. The SEM result using SmartPLS from 89 sabo dam samples shows twenty six confirmed to be valid form thirty nine indicators, which the eight dimensions and three aspect remain intact. By the satisfactory statistical value of AVE (average variance extracted) > 0,5; CR (composite reliability) > 0,8; Cronbach Alpha > 0,8 and p ≤ α 0,1these twenty six indicators are: spillway, main dam, wing, drip hole, sub dam, apron, side wall, filling, parapet, parapet frame, and dyke under sabo dam components performance; vegetation species under riparian vegetation condition; roughness, depth, and slope under river course condition; legal mining, illegal mining and actual mining under sand mining performance; technical recommendation and sand mining license, under regulation conformity; local occupation, education and inhabitant economic, under socio-culture-economic; private corporate social responsibility (CSR) under societal-private cooperation; and public facilities damage, and husbandry loss under disaster loss.
Asphalt cement is used as the main part of mixtures in pavement materials. It is necessary to know the physical and rheological properties to simulate the behavior of the asphalt binder. Rutting and pavements crack are the major distress of flexible pavement to enhance the properties of asphalt binder and to prolong the lifetime of roads must modify asphalt binder. The purpose of this paper is to analyze the physical and rheological properties where they are important parameters for predicting the efficiency of the asphalt binder. For the preparation of modified asphalt binders, asphalt (40-50) grade penetration from Daurah refinery has been used with two additives of bentonite (khawa clay) and crumb rubber; each additive has three percent (3 %, 6 %, and 9 %) of asphalt weight. To assess, the rheological properties used in numerous experiments involved the rotational viscometer (RV) at two temperatures of 135℃ ,165℃ , the dynamic shear rheometer (DSR) for the asphalt binder. The physical properties were tested via several conventional methods, such as penetration, ductility, and softening point tests. Also, a thin-film oven test to study the aging of original and modified asphalt pavement. The optimum content of the modifiers was 6% crumb rubber and 9% bentonite. From the result can conclude that the addition of bentonite and crumb rubber enhance asphalt properties such as increase the viscosity, ductility, and softening point, decrease penetration Compared to original asphalt, based on the results of rheological tests, the performance grade (PG) of original asphalt binder was PG64-16, and the performance degree for Bentonite modified Asphalt binder was PD70-16 and crumb rubber modified Asphalt binder was PD76-16.