Authors & Paper Name: Azharul Haq, Khondaker (June 2006). "Water Management in Dhaka". Water Resources Development 22 (2): 291–311.
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Authors & Paper Name: Das Gupta, Ashim; Babel, Mukund Singh; Albert, Xavier; Mark, Ole (June 2005). "Water Sector of Bangladesh in the Context of Integrated Water Resources Management: A Review". Water Resources Development 21 (2): 385–398.
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Authors & Paper Name: Khan, Hamidur Rahman; Siddique, Quamrul Islam (2000). "Urban Water Management Problems in Developing Countries with Particular Reference to Bangladesh". Water Resources Development 16 (1): 21–33.
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Good Practices in Urban Water Management: Decoding Good Practices for a Successful Future
Author: ed. by Anand Chiplunkar, Kallidaikurichi Seetharam, Cheon Kheong Tan | Size: 5 MB | Format:PDF | Quality:Original preprint | Publisher: ADB, National University of Singapore | Year: 2012 | pages: 228 | ISBN: 9789290927419
This report presents case studies on successful Asian water utilities. The case studies provide objective, accurate, and critical analyses of urban water management practices in eight Asian cities over a 10-year period.
Other local leaders throughout the developing world can use these cases to help craft their own solutions, taking into account specific local circumstances. What is most important for cities is to find some common base elements for success and then replicate these, albeit with appropriate modifications, to suit their own special conditions.
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A mechanistic study explaining the synergistic viscosity increase obtained from polyethylene oxide (PEO) and β-naphthalene sulfonate (BNS) in shotcrete
Author: J. Pickelmann, J. Plank | Size: 1.2 MB | Format:PDF | Quality:Original preprint | Publisher: Cement and Concrete Research Vol 42, Iss 11 | Year: November 2012 | pages: 1409–1416 | ISSN: 0008-8846
In shotcrete, a combination of polyethylene oxide (PEO) and β-naphthalene sulfonate (BNS) is commonly applied to reduce rebound. Here, the mechanism for the synergistic viscosity increase resulting from this admixture combination was investigated via x-ray diffraction (XRD), infrared and nuclear magnetic resonance (NMR) spectroscopy. It was found that the electron-rich aromatic rings present in BNS donate electrons to the alkyl protons of PEO and thus increase the electron density there. This rare interaction is known as CH–π interaction and leads to the formation of a supramolecular structure whereby PEO chains bind weakly to BNS molecules. Through this mechanism a polymer network exhibiting exceptionally high molecular weight and thus viscosity is formed. Among polycondensates, sulfanilic acid–phenol–formaldehyde (SPF) provides even higher synergy with PEO than BNS while melamine (PMS), acetone (AFS) or polycarboxylate (PCE) based superplasticizers do not work at all. Effectiveness of lignosulfonates is dependent on their degree of sulfonation.
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Mix proportion of eco-friendly fireproof high-strength concrete
Author: Se Jin Choi, Soo-Hwan Kim, Su-Jin Lee, Rosa Won, Jong-Pil Won | Size: 0.94 MB | Format:PDF | Quality:Original preprint | Publisher: Construction and Building Materials, Vol 38 | Year: January 2013 | pages: 181–187 | ISSN: 0950-0618
The optimum mix proportion for eco-friendly fireproof high-strength concrete was derived in this study. The mixture of the concrete was evaluated by thermal performance through a fire-resistance test. To derive the optimum mix proportion, ground granulated blast-furnace slag and porcelain were substituted, and a 0.1 vol.% fraction of polypropylene fibre was added to prevent spalling. Porcelain was used, as it is effective in improving residual strength. The RABT curve was adopted as the heating time–temperature curve for the fire-resistance test. The derived optimum mix proportion can contribute to ecological friendliness, as it produced up to 34.6% CO2 savings compared with the mixture using conventional cement. Furthermore, improvement in the characteristics of concrete was shown after exposing this mixture to high temperature following the addition of porcelain.
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Deterioration Mechanism of Cementitious Materials Under Acid Rain Attack
Author: Meng-Cheng Chenn, Kai Wang, Li Xie | Size: 2.38 MB | Format:PDF | Quality:Original preprint | Publisher: Engineering Failure Analysis | Year: September 2012
Cementitious material specimens were immersed in a simulated acid rain solution for different time periods to allow deterioration to occur and then the specimen strengths were measured and the mineralogical compositions and microstructures were analyzed using X-ray diffraction (XRD), Fourier Transform infrared (FT-IR) spectroscopy, scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) diffraction.
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[REQUEST] State-of-the-arts of research on aluminum alloy structures
Size: ?? MB | Format:PDF | Quality:Unspecified
JOURNAL OF BUILDING STRUCTURES 2007, 28(06) 100-109 DOI: ISSN: 1000-6869 CN: 11-1931/TU
SHEN Zuyan,GUO Xiaonong,LI Yuanqi
(College of Civil Engineering,Tongji University,Shanghai 200092,China)
Abstract：
Aluminum alloy structures are widely used in the world due to their special advantages,and more than 10 large aluminum alloy space structures have been constructed in China up to now.This paper provides a state-of-the-art review report on research on aluminum alloy structures related to material property,basic structural members,connection behaviors and structural system.In generally,the research work on aluminum alloy structures in many developed countries is relatively matured,especially for different basic structural members.While in China,such studies on aluminum alloy structures are being carried out more and more widely and deeply recently,most of which are focused on axially-compressed members,and no reliability analysis for aluminum alloy structures is conducted,mainly due to the lack of experiment data for statistic analysis.Therefore,it is very necessary to establish an experimental database for domestic aluminum alloy structures as a basic step to reliability analysis.
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Hi dudes!
Plz help me by downloading this paper for me
Thanks
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Posted by: freequo - 10-02-2012, 10:21 AM - Forum: Archive
- No Replies
Hello,
I have some request for papers.
Best regards
freequo
Study of scale effect of large-scale triaxial test of coarse-grained meterials
LI Chong, HE Chang-rong, WANG Chen, ZHAO Hong-fen
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Development of Super Large-scale Triaxial and Plane Strain Compression Testing Apparatus for Coarsegrained and Gravelly Soils.
FUKUSHIMA SHINJI, KITAJIMA AKIRA
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This edition continues to reinforce the welder's understanding of procedures. Drawing on his extensive practical and teaching experience in the field, the author describes in detail the manipulating procedures used to weld pipe joints.
You will find useful information on heat input and distribution, essentials of shielded metal-arc technology, distortion, pipe welding defects, welding safety, essentials of welding metallurgy, and qualification of the welding procedure and the welder.
Look for new or expanded coverage of:
• Root Bead--Pulse Current--Gas Tungsten Arc Welding
• Shielded Metal Arc Welding--Electrode
• Welding Steel for Low Temperature (Cryogenic) Service
• Down Hill Welding--Heavywall and Large Diameter
• Welding Metallurgy
• Weld Repair
Good book for anyone getting started with welding pipe
Contents
Forward
Preface
1. Introduction
2. Essentials of Shielded Metal-Arc Welding Technology
3. Heat Input and Distribution
4. Reperation of the Pipe Joint
5. Uphill Welding the Root Bead on Heavy-WallPipe (5G Position)
6. Welding the Rood Bead by the Gas Tungsten Arc Welding Process
7. The Intermediate and Cover Passes
8. Welding Thin-Wall Pipe
9. Horizontal Pipe Welding (20)
10. Welding Complicated Pipe Joints
11. Introduction to Welding Metallurgy
12. Distortion in Pipe Welding
13. Pipe Welding Defects
14. Fitting-UP Pipe
15. Qualification of the Welding Procedure & the Welder
16.General Welding Safety
Index
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