The Natural Road Construction Materials Of Southern Africa
DOWNLOAD
Download The Natural Road Construction Materials Of Southern Africa PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get The Natural Road Construction Materials Of Southern Africa book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
The Natural Road Construction Materials Of Southern Africa
DOWNLOAD
Author : H. H. Weinert
language : en
Publisher:
Release Date : 1980
The Natural Road Construction Materials Of Southern Africa written by H. H. Weinert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Geology categories.
Inventory Of Southern African Natural Road Construction Materials
DOWNLOAD
Author : H. Weinerth
language : en
Publisher:
Release Date : 1990
Inventory Of Southern African Natural Road Construction Materials written by H. Weinerth and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Pavements categories.
Climate Engineering Petrology And The Durability Of Natural Road Building Materials In Southern Africa
DOWNLOAD
Author : Hans Hartmut Weinert
language : en
Publisher:
Release Date : 1970
Climate Engineering Petrology And The Durability Of Natural Road Building Materials In Southern Africa written by Hans Hartmut Weinert and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Climatology categories.
The Relationship Between Index Testing And California Bearing Ratio Values For Natural Road Construction Materials In South Africa
DOWNLOAD
Author : I.J. Breytenbach
language : en
Publisher:
Release Date : 2009
The Relationship Between Index Testing And California Bearing Ratio Values For Natural Road Construction Materials In South Africa written by I.J. Breytenbach and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Roads categories.
Road Construction Technology In South Africa
DOWNLOAD
Author : Charles G. Dyer
language : en
Publisher: Juta
Release Date : 1982
Road Construction Technology In South Africa written by Charles G. Dyer and has been published by Juta this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Roads categories.
Standards For Road Construction Materials
DOWNLOAD
Author : National Institute for Transport and Road Research
language : en
Publisher:
Release Date : 1980
Standards For Road Construction Materials written by National Institute for Transport and Road Research and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Road materials categories.
Soil And Rock Construction Materials
DOWNLOAD
Author : Greg McNally
language : en
Publisher: CRC Press
Release Date : 2017-10-02
Soil And Rock Construction Materials written by Greg McNally and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-02 with Technology & Engineering categories.
An introduction to the investigation, extraction, processing and specification of natural soil and rock materials, with an emphasis on why particular material properties are sought and how they may be modified. The book covers the full range of soil and rock construction materials including crushed stone, sand and gravel, natural and prepared roadb
Standard Methods Of Testing Road Construction Materials
DOWNLOAD
Author : South African Council for Scientific and Industrial Research. Committee for State Road Authorities. Highway Materials Committee. Materials Testing Subcommittee
language : en
Publisher:
Release Date : 1979
Standard Methods Of Testing Road Construction Materials written by South African Council for Scientific and Industrial Research. Committee for State Road Authorities. Highway Materials Committee. Materials Testing Subcommittee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Road materials categories.
South African Roads
DOWNLOAD
Author : S. H. Kühn
language : en
Publisher:
Release Date : 1979
South African Roads written by S. H. Kühn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Roads categories.
The Relationship Between Index Testing And California Bearing Ration Values For Natural Road Construction Materials In South Africa
DOWNLOAD
Author : Izak Johannes Breytenbach
language : en
Publisher:
Release Date : 2013
The Relationship Between Index Testing And California Bearing Ration Values For Natural Road Construction Materials In South Africa written by Izak Johannes Breytenbach and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
The research portrayed in this dissertation aims to derive empirical means of predicting CBR values from index testing parameters and parameters calculated from them (e.g. shrinkage product). The project involved compiling a database of test results for a range of rock material types across moist and dry regions in southern Africa. The database was compiled in such a way that it represents natural gravels sampled (mostly) for construction or rehabilitation of road layer works. The database included a location description, material description, Weinert N-Value, Atterberg Limits, grading analysis and CBR values. In addition to this, the linear shrinkage product, shrinkage product, grading coefficient, grading modulus and dust ratio were calculated and also used in the analyses. All the samples were divided into two groups based on climate, as described by Weinert (1980). The data was then further sub-divided into compaction classes (95%, 98% and 100% Mod AASHTO) and within these compaction classes, each sample was assigned to a rock material group based on the classification proposed by Weinert (1980), but with minor alterations (e.g. further subdivision of pedogenic deposits). A total of 60 groups were created. Data processing was done using grading normalised to 100% passing the 37,5mm screen. In order to limit interdependency resulting from the cumulative grading, the sieve analysis results were converted to percentages retained on each sieve. This was necessary as statistical regressions often rejected datasets due to interdependency among input parameters (such as Atterberg Limits and cumulative grading). Based on the nature of the data, both stepwise linear regressions and Weibull regressions were performed. Though the Weibull regression is more suitable to the data (in theory) the linear regression could not be excluded, due to variable data. In addition, the existing model proposed by Kleyn (1955) which was derived empirically by Stephens (1988) was also retained for the analysis. In an attempt to refine Kleyn s model, the two parameters used by the method (i.e. grading modulus and plasticity index) were used in normal linear regressions in an attempt to adapt the model to specific material (and compaction) groups in the two climatic regions. More than 130 regressions were done for the final analysis (excluding experimental regressions, etc.), after restricting the predicted CBR ranges in an attempt to eliminate the prevailing data trend. The attempt proved futile, though, placing severe restrictions on the derived models. For each of the 60 groups all four methods were tested (i.e. stepwise linear regression, Weibull regression, Kleyn s model and a linear model adapted for each group based on Kleyn s model) and the most suitable model selected. A number of regressions were incomplete due to insufficient data, particularly in the groups associated with dry regions. Results proved poor and are ascribed to data variability rather than test methods. The data variability, in turn, is the result of test methods with poor reproducibility and repeatability. In short, the test methods (the CBR in particular) resulted in inconsistent data and subsequently poor results, making accurate predictions nearly impossible.