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Dewi, Ratna
Program Studi Teknik Sipil, Fakultas Teknik Universitas Sriwijaya
Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Transportation

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PENGARUH PENAMBAHAN SERBUK CANGKANG KEONG TERHADAP NILAI CBR TANAH LEMPUNG EKSPANSIF Hastuti, Yulia; Muhtarom, Ahmad; Iryani, Sakura Yulia; Derisqi, Azmi; Dewi, Ratna
CANTILEVER Vol 7, No 1 (2018): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

n this research, soil improvement is done by using waste of snail shells (LCK) in Desa Ulak Kembahang II, Kecamatan Lubuk Keliat, Kabupaten Ogan Ilir, Sumatera Selatan and soil from Tanjung Api-api Area, Gasing , Kabupaten Banyuasin, Sumatera Selatan . The soil used is a type of problematic soil that is expansive clay, which is known LL value (Liquid limit) more than 35%. The LCK used is then used as powder. Furthermore, there are 5 variations of percentage of addition of snail shell powder (SCK) with soil, and give the curing time is for 0, 1 and 7 days. Results from CBR Unsoaked (US) Testing resulted in the addition of SCK at a certain percentage and the curing time could increase the value of CBR expansive clay soil. The highest value of CBR Unsoaked on variation of percentage of SCK increase as much as 11% in the curing curing time for 7 days that is equal to 5.6% for the value of CBR US which in the original land has a CBR value of 3.5%. The result analysis of SEM-EDX test on soil mixture and SCK known SCK works as filler which fill the cavity found in soil grains and the main element of soil known as SiO2 and Al2O3 forming binder material with CaO.
PEMANFAATAN KARET MENTAH PADA FLEXIBLE PAVEMENT LASTON AC-WC DAN LATASTON HRS-WC Pataras, Mirka; Dewi, Ratna; Prasetya, Ahmad Dicky; Bazidno, Friko Denu
CANTILEVER Vol 6, No 1 (2017): Cantilever
Publisher : Jurusan Teknik Sipil & Perencanaan Fakultas Teknik Universitas Sriwijaya

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Abstract

With the many problems that begin to occur from the young asphalt cracked, the asphalt is not durable, the bumpy asphalt, and so it needs a new breakthrough to find a solution so that in the world of pavement in Indonesia can be better. The objective of this research is to add raw rubber or latex as an added ingredient of mixed laston (AC-WC) and lataston or HRS-WC as well as the effect of change of AC and HRS characteristics in addition to the percentage amount of raw rubber.This research was done by adding crude rubber on asphalt with percentage addition of 5%, 10% and 15%. The optimum asphalt content obtained from the mixture of normal test specimen as much as 15 specimens is 6.25% and from the bitumen content is then used to make asphalt raw rubber mixture as much as 3 specimens from each percentage of rubber addition. After that the research is continued by comparing the characteristics of the normal asphalt test results that have been in can with the addition of asphalt raw rubber mixture from each presentse is in search of the percentage addition of crude rubber included in the specification. From the result of this research, it is obtained that the optimum bitumen content at the normal mixture is 6,25% and the increase of optimal crude rubber percentage is at the crude rubber content 5% and 10% with the stability, melt and marshall quotient (MQ) value obtained appropriate and included in the specification of the test results marshall conducted.
Co-Authors Bazidno, Friko Denu Derisqi, Azmi Hastuti, Yulia Mirka Pataras Muhtarom, Ahmad Prasetya, Ahmad Dicky Sakura Yulia Iryani