Diarto Trisnoyuwono
Jurusan Teknik Sipil Politeknik Negeri Kupang

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Pengaruh Penambahan Fly Ash Terhadap Sifat Workability Dan Sifat Fisik - Mekanik Beton Non Pasir Dengan Agregat Alwa Asal Cilacap Trisnoyuwono, Diarto
Rekayasa Sipil Vol 9, No 1 (2015)
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Brawijaya

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Abstract

A massive concrete production impact on improving air pollution from cement plants. In addition, there are areas has limited aggregate resources that meet building requirement. Building materials technology bring solution for such problems, for example fly ash which can improve the performance of concrete, artificial lightweight aggregate (ALWA) from shale combustion and no-fines concrete. The study aims to determine effect of the fly ash in the mixes of no-fines concrete with ALWA aggregate to the degree of workability and physical - mechanical properties. This research was conducted by the addition of the variable portion of fly ash by 10-20% in comparison mixture of cement - aggregate 1: 4; 1: 6; 1: 8, and the measured value of the slump (workability values) and compressive strength. The results indicate the addition of fly ash were able to increases the value of the slump of up to 7 cm and reach 19.71 MPa of compressive strength. 
BETON NON PASIR DENGAN AGREGAT DARI BATU ALAM (BATU APE) SUNGAI LUA KABUPATEN KEPULAUAN TALAUD SULAWESI UTARA Trisnoyuwono, Diarto; Tjokrodimuljo, Kardiyono; Satyarno, Iman
Civil Engineering Forum Teknik Sipil Vol 19, No 1 (2009): JANUARI 2009
Publisher : Civil Engineering Forum Teknik Sipil

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Abstract

Timber supply is diminishing in addition to the trend to lower quality but higher cost of wood production manufacturing. However, because the demand of this material continues, an alternative or substitution on the use of timber, such as bamboo laminated, is desirable. Having susceptible character to powder by beetles attack, bamboo must be passed through preservation process before it is applied as laminating materials, but chemical preservative materials used in industrial process ring negative impacts to the environment. One of human and environmental friendly preservatives is the tobacco extract. Nevertheless, the most effective concentration of tobacco extract and its influence to the adhesive materials have not been well recognized. This research objective was to investigate the influence of tobacco extract to the natural and mechanic behaviour of laminated bamboo. Dried tobacco flake was mixed with water in variable concentration of 100, 125, 150 and 175 gram/liter. Bamboo split were given treatment in boiling water with tobacco extract solutions. As benchmarking, bamboo split also preserved with boiling water (without preservatives materials) and 5% concentration of borax. Non preservative bamboo was used as the control. The result of experiment showed that 150 gram/liter tobacco extract concentration of caused 61,33% insect mortality and 1,87% decreased weigh, which is effective to be used as preservative in compare to other three concentrations. Water content and density observation showed that preservation using 150 gram/liter extract tobacco comparing to non preservative boiling preservation, produced smaller value of water content and larger value of density than borax preservative. Preservation using 150 gram/liter tobacco extract produced highest value of compression parallel to grain and modulus of the bamboo elasticity Petung mechanic properties were 277,95 MPa and 170,34 MPa, respectively. Mechanical properties of laminated bamboo that were significantly influenced by preservative variation showed that highest values for compression parallel to grain and modulus of elasticity were 66,09 MPa and 127,12 MPa, respectively and reached by preservation using 100 gram/liter of tobacco extract.
Dampak Kerusakan Dini Perkerasan Jalan terhadap Kerugian Aspek Finansial Simamora, Marsinta; Trisnoyuwono, Diarto; Muda, Anastasia Hendrina
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 24, Nomor 2, DESEMBER 2018
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (674.906 KB) | DOI: 10.14710/mkts.v24i2.16083

Abstract

National road management is not optimal and inefficient, the indications can be seen from the number of early damage cases of the road construction found. Indeed, natural damage to road construction is unavoidable but it becomes a problem if the damage occurs not long after the road product is handed over to the road manager or the government. Then the next question can arise whether the phenomenon of early pavement damage will cause harm to both road users and the government.This study aims to show the thinking framework of financial consequences and apply it through a model due to the occurrence of premature damage. Referring to the concept of benefit value that is represented by road conditions over the life of the service, then roads that have been damaged before their construction ends will result in losses due to loss of benefits. Based on this concept, a simulation was conducted using a national road data. Simulation results show that there is an estimated financial loss due to the occurrence of early damage. For early damage with a condition value of loss of 36 then the estimated loss is Rp 458,257,899.41 per kilometer. Estimated average loss per kilometer for each loss of one unit of condition value is Rp 12,72,386.09. The results of this study also show that roads that do not suffer early damage do not cause losses or losses are zero.