scholarly journals Studies on Technology of Mass Production and Quality Control in Road Base Material Using Coal Ash.

1998 ◽  
Vol 24 (3) ◽  
pp. 374-379
Author(s):  
YASUNORI SHIBATA ◽  
KAZUO OZASA ◽  
KAZUO TSUZURA ◽  
HIDETOSI IZUMI
Keyword(s):  
Quality Control ◽  
Mass Production ◽  
Base Material ◽  
Coal Ash ◽  
Road Base

Utilization of coal ash from fluidized-bed combustion boilers as road base material

1995 ◽  
Vol 14 (2) ◽  
pp. 69-77 ◽  
Author(s):  
T. Takada ◽  
I. Hashimoto ◽  
K. Tsutsumi ◽  
Y. Shibata ◽  
S. Yamamuro ◽  
...  
Keyword(s):  
Fluidized Bed ◽  
Base Material ◽  
Coal Ash ◽  
Fluidized Bed Combustion ◽  
Road Base

scholarly journals PEMANFAATAN ABU BATUBARA SEBAGAI MATERIAL TANAH DASAR DI TAMBANG BATU HIJAU, SUMBAWA BARAT

2020 ◽  
Vol 1 (1) ◽  
pp. 595-602
Author(s):  
Mara Maswahenu ◽  
Firmansyah Firmansyah ◽  
Aulya Salsabila
Keyword(s):  
Bottom Ash ◽  
Base Material ◽  
Coal Ash ◽  
Toxicity Characteristic Leaching Procedure ◽  
Loss On Ignition ◽  
The Road ◽  
Road Base ◽  
Access Road ◽  
Leaching Procedure ◽  
Radionuclide Activity

ABSTRAK Pemanfaatan abu batubara (Fly Ash B409 dan Bottom Ash B410) yang sebelumnya dimanfaatkan oleh PT Amman Mineral Nusa Tenggara (PTAMNT) di tambang Batu Hijau sebagai substitusi semen dalam pembuatan beton hanya menyerap 1,7% dari total abu batubara yang dihasilkan. PLTU PTAMNT dapat menghasilkan ± 1.000 ton abu batubara per bulan. Tujuan pemanfaatan abu batubara sebagai material campuran lapisan tanah dasar adalah meningkatkan penerapan prinsip 3R limbah B3 secara internal (sampai dengan 100%) dan mengurangi biaya perawatan dan perbaikan jalan dengan meningkatnya kualitas lapisan tanah dasar. Pada awal tahun 2018, PTAMNT telah memulai kajian pemanfaatan abu batubara sebagai bahan lapisan tanah dasar (road base) dan telah memperoleh izin pemanfataan abu batubara sebagai substitusi bahan baku tanah lapisan dasar (subgrade) sesuai Keputusan Menteri Lingkungan Hidup dan Kehutanan Nomor SK.337/Menlhk/Setjen/PLB.3/5/2019   tanggal 13 Mei 2019. Beberapa pengujian telah dilakukan sesuai persyaratan yang telah ditentukan dalam Peraturan Pemerintah Nomor 101 Tahun 2014 dan dalam izin pemanfaatan,  termasuk diantaranya uji Toxicity Characteristic Leaching Procedure (TCLP), Loss on Ignition (LoI), Total Oksida Logam,  uji California Bearing Ratio (CBR) laboratorium dengan berbagai komposisi pencampuran tanah dan abu batubara, serta uji aktivitas radionuklida.  Hasil uji sampel campuran abu batubara menunjukan bahwa (1) semua hasil analisis TCLP berada di bawah baku mutu pada Lampiran III dan IV PP101 Tahun 2014, (2) nilai LoI sebesar 8,4%, (3) nilai total oksida logam (penjumlahan SiO2, Al2O3, dan Fe2O3) sebesar 66,1% (kelas C menurut ASTM C618012a dan SNI 2460:2014),  (4) pencampuran tanah dengan abu batubara dapat menaikkan nilai CBR (4-18%), dan (5) aktivitas radionuklida setiap parameter kurang dari 1Bq/gram.  Dinyatakan bahwa pencampuran abu batubara pada lapisan tanah dasar (road base) secara teknis dapat memberikan peningkatan kekuatan daya dukung tanah dasar dengan menaikkan hydraulic conductivity dan menurunkan permeabilitas tanah. Pemanfaatan ini (yang mana telah mendapatkan izin sesuai peraturan perundangan yang berlaku) dapat diaplikasikan pada jalan akses di area reklamasi timbunan batuan penutup dengan ketebalan 2.00 meter atau jalan umum di area sekitar Batu Hijau dengan ketebalan 0.50 meter. Komposisi abu batubara yang dicampurkan maksimal 50% dari berat total campuran tanah dasar Keywords: Abu batubara, Limbah B3, pemanfaatan, 3R  ABSTRACT Coal ash utilization (Fly Ash B409 dan Bottom Ash B410) that has been conducted by PT Amman Mineral Nusa Tenggara (PTAMNT) in Batu Hijau Mine as cement substitute for concrete production was only be able to absorb 1.7% of the total coal ash produced. PTAMNT’s Coal Power Plant can produce ±1,000 m3 coal ash each month. The purposes of utilizing coal ash as road base material blend are to increase the principal application of hazardous waste 3R internally (up to 100%) and to reduce road maintenance and repair cost by increasing the road base quality. In the early 2018, PTAMNT has started the study to utilize coal ash as a road base material blend and acquired the permit based on The Decree of Minister of Environmental Affairs and Forestry Number SK.337/Menlhk/Setjen/PLB.3/5/2019 dated 13 May 2019. Several tests had been run according to the regulated requirements on Government Regulations Number 101 Year 2014, in which include Toxicity Characteristic Leaching Procedure (TCLP) test, Loss on Ignition (LoI), Total Metal Oxide, California Bearing Ratio (CBR) laboratory test with several composition of blend between soil and coal ash, and radionuclide activity test. The result of the given test showed that (1) all TCLP analysis were below the quality standards written on Attachment III and IV PP101 Year 2014, (2) LoI value of 8.4%, (3) total metal oxide (addition of SiO2, Al2O3, dan Fe2O3) value of 66.1% (class C according to ASTM C618012a and SNI 2460:2014), (4) increased CBR value (4-18%) as a result of soil-coal ash blend, (5) radionuclide activity for each parameter is less than 1 Bq/gram. It is stated that coal ash blending on road base material can increase the strength capacity technically by increasing the hydraulic conductivity and reducing soil permeability. This utilization (which already obtained the permit pursuant to prevailing laws and regulations) can be applied on the access road of waste rock dump reclamation with 2,00 meter thickness or primary access road around Batu Hijau with 0.50 meter thickness. The maximum total composition of coal ash is 50% of the total weight of the road base. Keywords: Coal Ash, Hazardous Waste, Utilization, 3R

Durability of Cement Stabilized Cold-Recycled of Asphalt Pavement Materials

2012 ◽  
Vol 174-177 ◽  
pp. 1188-1192 ◽  
Author(s):  
Lian Yu Wei ◽  
Zhi Yu Guo
Keyword(s):  
Asphalt Pavement ◽  
Base Material ◽  
Road Construction ◽  
Thermal Shrinkage ◽  
Construction Process ◽  
Pavement Materials ◽  
Road Base ◽  
Wide Range ◽  
Dry Shrinkage ◽  
Recycled Material

In recent years, due to the dual pressures of resources and the environment,the clod recycled technology renovation and expansion of the old road and new road construction process increasingly attention increasingly wide range of applications. In this paper, the water stability of the cold recycled materials in asphalt pavement on cement additives, frozen stability, thermal shrinkage resistance, dry Shrinkage thefour indicators of experiments to evaluate its durability, and compared with the typical semi-rigid material. To verify the feasibility of the cold recycled material as road base material.

Life Tables as Tools of Evaluation and Quality Control for Arthropod Mass Production

2014 ◽  
pp. 241-275 ◽  
Author(s):  
Maribel Portilla ◽  
Juan A. Morales-Ramos ◽  
M. Guadalupe Rojas ◽  
Carlos A. Blanco
Keyword(s):  
Quality Control ◽  
Mass Production ◽  
Life Tables

Key Construction Technology of Porous Concrete Permeable Base

2014 ◽  
Vol 587-589 ◽  
pp. 1162-1166
Author(s):  
Ai Ming Bai
Keyword(s):  
Quality Control ◽  
Technological Process ◽  
Base Material ◽  
Construction Technology ◽  
Technological Parameters ◽  
Composition Design ◽  
Porous Concrete ◽  
Construction Machinery

Porous concrete also be called macropterous concrete or porous lean concrete.As a new base material,it is a lean concrete between cement stabilized macadam and ordinary concrete.Based on Luoyang beltway project,this paper describes the composition design of porous concrete,and discusses the combination of construction machinery,technological process,QCS(quality control specification) and test detection of porous concrete permeable base.Also we do research on many technological parameters such as mixing,paving,molding,maintenance in the construction of porous concrete permeable base.This provides a reference on construction technology and its application.

scholarly journals Quality identification methodology applied to wall-elements based on modal analysis

2015 ◽  
Vol 11 (4) ◽  
pp. 507-516 ◽  
Author(s):  
Mariusz Zóltowski ◽  
Ronald M. Martinod
Keyword(s):  
Quality Control ◽  
Modal Analysis ◽  
Mass Production ◽  
Design Methodology ◽  
Production Quality ◽  
State Assessment ◽  
Critical Levels ◽  
Content Type ◽  
Current Mass

Purpose – The recommendation of structural standards, e.g. PN-B-03002, shows a need to control the production quality of wall-elements; the quality control demands suitable guidelines to fit the requirements of the current mass-production of the wall-elements, then, the structural standard recognizes the need of improving the methods to identify the real elements quality. The paper aims to discuss these issues. Design/methodology/approach – The proposed inspection methodology corresponds to assessment models that combine the numerical and symptomatic models to evaluate the critical levels of wall-elements, based on non-intrusive tests through the measurement of a set of signals, using the Experimental Modal Analysis (EMA)-based techniques. Findings – The presented work is developed with an approach that applies advanced calculating techniques used for the structural analysis in civil engineering focused on the technical state assessment. Originality/value – The paper proposes a diagnostic methodology that can be added to the current regulations and standards based on EMA techniques.

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