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Media Teknik Sipil
Published by Universitas Muhammadiyah Malang
ISSN : 16933095     EISSN : 25977660     DOI : 10.2229.
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol. 10 No. 1 (2012): Februari" : 12 Documents clear
PENGARUH MATERIAL DINDING SEMEN ECENG GONDOK TERHADAP PENYERAPAN SUARA (FUNGSI AKUSTIK) Winodianto Dodi Iffandani
Media Teknik Sipil Vol. 10 No. 1 (2012): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v10i1.1217

Abstract

&lsquo;Eceng Gondok&rsquo; was still considered as troubled weeds plant, since the growth was so fastand in 3-4 months able to cover more than 70% water surface.The research was done in Civil Engineering Laboratory University of Muhammadiyah Malangby prototype placement south area of University of Muhammadiyah Malang stadium. Compoundmaterial with &lsquo;Eceng Gondok&rsquo; compound material : glue : cement was 1:1:2.5. Test was done in 3sound sources 80 dB, 85 dB, and 90 dB.Test which was done to wall prototype was bounce back sound, escape sound, and soundabsorption to eceng gondok wall by comparing to brick wall prototype with similar test. From testand calculation, there found average value for eceng gondok wall was not better in sound absorptionwith brick wall > eceng gondok wall in sound source 80 dB, 85 dB, and 90 dB found 31.63 > 28.96dB, 36.64 > 30.06 dB, 39.81> 29.95 dB. eceng gondok wall was better for escape sound with valuebrick wall < eceng gondok wall in sound source 80 dB, 85 dB, and 90 dB found 39.86 < 42.46 dB,39.68 < 46.34 dB, 41.46 < 51.63 dB. And eceng gondok wall could be similar in echo sound withsignificance 5% at the sound source 80 dB, 85 dB, and 90 dB.Keywords: cement wall, &lsquo;Eceng Gondok&rsquo;, sound absorption (acoustic)
PERBANDINGAN MORTAR BERPASIR PANTAI DAN SUNGAI Yusuf Wahyudi
Media Teknik Sipil Vol. 10 No. 1 (2012): Februari
Publisher : Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jmts.v10i1.1218

Abstract

The use of sand beach as building material is very rarely used because considering the possibledamage toward the other building materials that caused by salt content in it. This research is aimedto provide an overview comparison of mortar with sand beach and Brantas River, and also the useof cement type Ordinary Portland Cement (PC) and Portland Pozzoland Cement (PPC).The result of this research showed that the average weight of sand beach is 1.7739 ton/m3,the average of dry density: 2.55, the avarege of SSD density: 2.63, the average of appearancedensity: 2.83, the average of absorption: 2.16%. The value of sand silt in Sendang Biru beach is1.452%, while for Brantas River is 1.424%. The best compressive strength of mortar was showedby the mixing of 20% of pp Sendang Biru and 80% of ps Brantas River, that is 318,479 kg/cm2, orabout 28.5% bigger than mortar control (1pc cement: 3ps Brantas) that is 247,706 kg/cm2.Furthermore, the compressive strength of pc mortar cement substituted by sand beach is decreaseto 68%, 25%, and 22%, while for the mixing of pp Sendang Biru compared with ps Brantas60%:40%, 80%:20%, and 100%:0%. The average compressive strength of pc cement mortar ishigher than the average compressive strength of ppc cement mortar in 28 days. The compressivestrength of mortar 1pc: 3 sand in the mix of 100% ps Brantas pc cement is 373.2 kg/cm2. Furthermore,the compressive strength of mortar subtitued with sand beach 20%, 40%, 60%, 80%, and 100%each is decreased to be 97.4%, 74.5%, 58.2%, 31.5%, and 22.8% from value control.Keyword: characteristic, compressive strength, mortar, sand beach, Portland cement, pozzolancement.

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