PEMAKAIAN KAPUR GYPSUM LIMBAH PT. PETROKIMIA GRESIK SEBAGAI BAHAN STABILISASI TANAH LEMPUNG LUNAK UNTUK TANAH DASAR

Kerusakan pada konstruksi perkerasan jalan dKerusakan pada konstruksi perkerasan jalan disebabkan oleh banyak faktor. Selain beban–beban kendaraan, tanah dasar juga mempunyai pengaruh terhadap kerusakan yang terjadi. Ada beberapa metode yang dipergunakan untuk memperbaiki sifat–sifat fisik dan mekanis dari tanah dasar tersebut. Salah satunya adalah dengan metode stabilisasi, metode stabilisasi yang sudah dikembangkan untuk tanah lempung lunak adalah metode stabilisasi kimia dengan kapur atau semen. Jenis kapur yang umum digunakan adalah kapur hidup CaO (quick lime atau kalsium oksida) dan kapur mati Ca(OH)2 (slake lime atau kalsium hidrosikda). Selain dua jenis kapur diatas, sebetulnya ada jenis gypsum yang merupakan hasil limbah perusahaan pupuk, hanya saja jenis gypsum ini masih sebatas digunakan sebagai pengisi (filler) saja. Padahal jumlah material kapur gypsum yang tersedia sangat banyak dimana berdasarkan informasi dari perusahaan pupuk PT. Petrokimia Gresik, limbah gypsum yang dihasilkan adalah sebesar 250.000 ton/tahun. Berdasarkan latar belakang tersebut, maka direncanakan penelitian untuk mengetahui pengaruh penambahan kapur gypsum terhadap peningkatan parameter fisik dan mekanis tanah lempung lunak.. Desain prosentase kapur gypsum yang direncanakan adalah sebesar 10 %, 20 %, 30 %, dan 40% terhadap berat kering tanah lempung lunak. Adapun pengujian yang dilakukan untuk stabilisasi tanah lempung lunak ini, yaitu sifat-sifat fisik dan mekanis tanah. Sifat-sifat fisik tanah antara lain : volumetri-gravimetri ( , w, GS, e, dan Sr), analisa saringan, batas atterberg (batas cair, batas plastis dan batas susut), sedangkan sifat mekanis tanah: percobaan pemadatan (standard proctor), kuat tekan bebas (Unconfined Compression Test), dan percobaan CBR (California Bearing Ratio) . Proses pemeraman benda uji yang ditetapkan adalah 0,5 bulan; dan 1 bulan. Dari parameter-parameter hasil pengujian laboratorium tersebut akan digunakan untuk perhitungan stabilitas dan penurunan timbunan badan jalan dengan menggunakan permodelan numerik plaxis. Hasil penelitian yang dilakukan menunjukkan bahwa penambahan kapur gypsum sebesar 10%, 20%, 30% dan 40% terhadap tanah lempung lunak yang diteliti, belum berpengaruh terhadap sifat – sifat fisik dan teknis dari tanah tersebut. Hal ini terlihat dari harga Indek Plastisitasnya yang mengalami kenaikan dari 26,64% (kondisi asli) menjadi 28,86% (kondisi tanah + gypsum 10%); 30,15% (tanah + gypsum 20%); 32,65% (tanah + gypsum 30%); 33,89% (tanah + gypsum 40%). Kuat tekan bebas tanah (nilai qu) mengalami penurunan dari 1,326 kg/cm2 (kondisi asli) turun menjadi 1,283 kg/cm2 (tanah + gypsum 10%); 1,254 kg/cm2 (tanah + gypsum 20%); 1,233 kg/cm2 (tanah + gypsum 30%); dan 1,190 kg/cm2 (tanah + gypsum 40%), begitu pula daya dukung tanah (CBR) tersebut mengalami penurunan dari 5,67% (kondisi asli) turun menjadi 5,34% (kondisi tanah + gypsum 10%) ; 4,76% (gypsum 20%); 3,89% (gypsum 30%); dan 3,21% (gypsum 40%). Dan hasil dari plaxis didapatkan nilai safety factor paling aman 3,774 dan penurunan 49.09 mm pada campuran gypsum 10% stabilisasi 0,5 meter.


Alt. Description

Damage to the construction of road pavement is caused by many factors. In addition to vehicle loads, subgrade also have an influence on the damage. There are several methods used to improve the properties of the soil physical and mechanical basis. One is the method of stabilization, stabilization methods that have been developed for soft clays is a method of chemical stabilization with lime or cement. Commonly used type of lime is calcium oxide CaO (quick lime or calcium oxide) and slaked lime Ca (OH) 2 (slake lime or calcium hidrosikda). In addition to the above two types of limestone, in fact there are types that are the result of waste gypsum fertilizer company, it\'s just that type of gypsum is still limited to be used as a filler (filler) only. Though the amount of lime gypsum material available is very much which is based on information from a fertilizer company PT. Petrokimia Gresik, gypsum waste generated amounted to 250,000 tons / year. Based on this background, the planned research to determine the effect of the addition of lime gypsum to the improvement of physical and mechanical parameters of soft clay. Design of the planned percentage of lime gypsum is 10%, 20%, 30%, and 40% of the dry weight of soft clay. The tests performed for the stabilization of soft clay, that is, physical properties and mechanical soil. Soil physical properties include: volumetric-gravimetric (, w, GS, e, and Sr), sieving, atterberg boundary (liquid limit, plastic limit and shrinkage limit), while the mechanical properties of soil: experimental compaction (standard Proctor) , a strong free press (unconfined Compression Test), and experimental CBR (California Bearing Ratio). Curing process of the test object set is 0.5 months, and 1 month. From these parameters the results of laboratory testing will be used for the calculation of stability and decline in the road embankment by using numerical modeling plaxis. The study conducted showed that the addition of lime gypsum by 10%, 20%, 30% and 40% of soft clay under investigation, had not affected properties - physical and technical properties of soil. This can be seen from Plastisitasnya price index which rose from 26.64% (original condition) to 28.86% (soil + gypsum 10%); 30.15% (20% soil + gypsum); 32.65% ( ground gypsum + 30%); 33.89% (40% soil + gypsum). Compressive strength of soil-free (qu value) has decreased from 1.326 kg/cm2 (native conditions) drops to 1.283 kg/cm2 (soil + gypsum 10%); 1.254 kg/cm2 (soil + gypsum 20%); 1.233 kg/cm2 ( ground gypsum + 30%), and 1.190 kg/cm2 (soil + gypsum 40%), as well as soil bearing capacity (CBR) declined from 5.67% (native conditions) drops to 5.34% (gypsum 10%) 4.76% (gypsum 20%) 3.89% (gypsum 30%), and 3.21% (gypsum 40%). And the results of the safety factor obtained plaxis safest 3.774 and 49.09 mm decrease in gypsum mixture 10% stabilization of 0.5 meters.

1.  ITS-Undergraduate-19232-pemakaian-kapur-gypsum-limbah-pt-petrokimia-gresik-sebagai-bahan-stabilisasi-tanah-lempung-lunak-unt.pdf - 16 KB
2.  ITS-Undergraduate-19232-the-use-of-waste-gypsum-lime-ptpetrokimia-gresik-as-soft-clay-soil-stabilizationmaterials-for-subgra.pdf - 17 KB
3.  ITS-Undergraduate-19232-3110040503-abstract-idpdfpdf.pdf - 185 KB
4.  ITS-Undergraduate-19232-3110040503-abstract-enpdfpdf.pdf - 179 KB
5.  ITS-Undergraduate-19232-3110040503-approval-sheetpdf.pdf - 389 KB
6.  ITS-Undergraduate-19232-3110040503-prefacepdfpdf.pdf - 175 KB
7.  ITS-Undergraduate-19232-3110040503-tablespdfpdf.pdf - 180 KB
8.  ITS-Undergraduate-19232-3110040503-table-of-contentpdfpdf.pdf - 179 KB
9.  ITS-Undergraduate-19232-3110040503-illustrationpdfpdf.pdf - 212 KB
10.  ITS-Undergraduate-19232-3110040503-bibliographypdfpdf.pdf - 178 KB
11.  ITS-Undergraduate-19232-3110040503-biographypdfpdf.pdf - 186 KB
12.  ITS-Undergraduate-19232-3110040503-chapter1pdfpdf.pdf - 182 KB
13.  ITS-Undergraduate-19232-3110040503-conclusionpdfpdf.pdf - 211 KB
14.  ITS-Undergraduate-19232-3110040503-paperpdfpdf.pdf - 1052 KB
15.  ITS-Undergraduate-19232-3110040503-presentationpdfpdf.pdf - 3493 KB

• PERFORMANCE OF SHIP MANEUVERING CONTROLLER BASED ON FUZZY LOGIC SUGENO-TAKAGI IN INTERNATIONAL WATERS
• KAJIAN ESTETIKA YANG BEDA RELIEF CANDI JAWA TIMUR
• BALAI APRESIASI TARI
• MODELING OF RAIN RATE IN SURABAYA USING FUZZY AUTOREGRESSIVE (FUZZY AR)
• ARMA MODELING FROM RAIN RATE MEASUREMENT TO SIMULATION COMMUNICATION CHANNEL MODELING FOR MILLIMETER WAVE IN SURABAYA
• AKAIKE INFORMATION CRITERIA APPLICATION TO STATIONARY AND NONSTATIONARY RAINFALLS FOR WIRELESS COMMUNICATION CHANNEL IN SURABAYA
• ARIMA MODELLING FOR RAIN ATTENUATION ON 28-GHZ TERRESTRIAL RADIO LINK IN SURABAYA
• VECTOR AR IMPLEMENTATION FOR RAIN RATE SPACE TIME SERIES MODELING IN SURABAYA
• ANALYSIS OF TROPICAL ATTENUATION STATISTICS USING SYNTHETIC STORM FOR MILLIMETER-WAVE WIRELESS NETWORK DESIGN
• STATISTICAL OF RAIN RATES FOR WIRELESS CHANNEL COMMUNICATION IN SURABAYA

• PERFORMANCE OF SHIP MANEUVERING CONTROLLER BASED ON FUZZY LOGIC SUGENO-TAKAGI IN INTERNATIONAL WATERS
• KAJIAN ESTETIKA YANG BEDA RELIEF CANDI JAWA TIMUR
• BALAI APRESIASI TARI
• MODELING OF RAIN RATE IN SURABAYA USING FUZZY AUTOREGRESSIVE (FUZZY AR)
• ARMA MODELING FROM RAIN RATE MEASUREMENT TO SIMULATION COMMUNICATION CHANNEL MODELING FOR MILLIMETER WAVE IN SURABAYA
• AKAIKE INFORMATION CRITERIA APPLICATION TO STATIONARY AND NONSTATIONARY RAINFALLS FOR WIRELESS COMMUNICATION CHANNEL IN SURABAYA
• ARIMA MODELLING FOR RAIN ATTENUATION ON 28-GHZ TERRESTRIAL RADIO LINK IN SURABAYA
• VECTOR AR IMPLEMENTATION FOR RAIN RATE SPACE TIME SERIES MODELING IN SURABAYA
• ANALYSIS OF TROPICAL ATTENUATION STATISTICS USING SYNTHETIC STORM FOR MILLIMETER-WAVE WIRELESS NETWORK DESIGN
• STATISTICAL OF RAIN RATES FOR WIRELESS CHANNEL COMMUNICATION IN SURABAYA