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Study of Gold Mine Tailings Utilization as Fine Aggregate Material for Producing Shotcrete Based on Concept of Green Technology Image
Conference paper

Study of Gold Mine Tailings Utilization as Fine Aggregate Material for Producing Shotcrete Based on Concept of Green Technology

Shotcrete is concrete that is applied by spraying. The use of shotcrete from year-to-year increase. Because sand is a material for the manufacture of shotcrete, the volume of sand will increase as well. Sand excavation on a large scale can lead to disruption of the environment. Reuse of tailings for shotcrete can reduce the volume of sand used. In addition, utilize waste materials will reduce the contamination surrounding environment. This study is a continuation of previous studies, that the use of tailings as conventional concrete manufacture. The results showed that the optimum tailings substitution of 25% both for conventional concrete or shotcrete. Laboratory studies conducted at the Civil Engineering Laboratory of University of Bandar Lampung and PT Semen Baturaja. Research using a shotcrete equipment done in PT Natarang Mining, Way Linggo, Lampung. Type of admixture used is monomer composite material under the trade name Polcon. The compressive strength achieved in the laboratory was 32.7 MPa when not using Polcon as admixture. When using Polcon, the compressive strength reached 33.5 MPa. Crushing compressive strength of shotcrete in the field trial is 20.3 MPa. For studying the micro structure of tailings, cement, mortar with tailings 100%, 50% and without tailings, the Scanning Electron Microscopy micro photo are done.
Hawkers Empowerment Strategy to Promote Sustainable Economy in Surakarta Image
Conference paper

Hawkers Empowerment Strategy to Promote Sustainable Economy in Surakarta

Surakarta has implemented strategies of hawkers arrangement, such as relocation and stabilization. However, in 2012, after the arrangement, the number of hawkers increased not only new hawkers but also those who had been arranged before. They returned to illegal location due to perception that their needs were not accommodated. On the other side, hawkers' needs are different depending on their commodity types. The correlation among the characteristics of hawkers by commodity types, hawkers' involvement in arrangement process and the arrangement success, has prompted authors to develop hawkers empowerment strategies in Surakarta, which is adaptive to those components. The analysis was done by frequency distribution and descriptive techniques. The results of this study showed that the arrangement process has not been able to fully empower the hawkers. Strategies are then formulated into five groups according to the type of commodity: non-food, raw-food, consumed-at-place fast food, take-away fast food, and services.
The Effect of Use Styrofoam for Flexural Characteristics of Reinforced Concrete Beams Image
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Four Phases Quality Function Deployment (QFD) by Considering Kano Concept, TIME and Manufacturing Cost Image
Conference paper

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The Effect of Use Styrofoam for Flexural Characteristics of Reinforced Concrete Beams Image
The Effect of Use Styrofoam for Flexural Characteristics of Reinforced Concrete Beams Image
Conference paper

The Effect of Use Styrofoam for Flexural Characteristics of Reinforced Concrete Beams

Four Phases Quality Function Deployment (QFD) by Considering Kano Concept, TIME and Manufacturing Cost Image
Four Phases Quality Function Deployment (QFD) by Considering Kano Concept, TIME and Manufacturing Cost Image
Conference paper

Four Phases Quality Function Deployment (QFD) by Considering Kano Concept, TIME and Manufacturing Cost

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Conference paper

Impact of Motor Vehicle Emissions on Air Quality in Urban and Sub Urban Area

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The Supply Chain System of Cassava on the Tapioca Industry

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Traditional Market Revitalization as an Urban Catalyst in the City of Surakarta Image
Conference paper

Traditional Market Revitalization as an Urban Catalyst in the City of Surakarta

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