Evaluation Of Concrete Mixtures For Underwater Pile Repairs
DOWNLOAD
Download Evaluation Of Concrete Mixtures For Underwater Pile Repairs PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Evaluation Of Concrete Mixtures For Underwater Pile Repairs 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
Evaluation Of Concrete Mixtures For Underwater Pile Repairs
DOWNLOAD
Author : KH. Khayat
language : en
Publisher:
Release Date : 1991
Evaluation Of Concrete Mixtures For Underwater Pile Repairs written by KH. Khayat and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with Admixtures categories.
Repair of submerged concrete piles that have undergone considerable loss in cross section and strengthening of existing marine piles often involves jacketing the piles and filling the annular spacings between the jackets and the piles with concrete. In this paper, physical and mechanical properties that are deemed necessary to secure high-quality concrete under water were evaluated for numerous mixtures. Four concrete mixtures were selected to repair 2.4-m (8-ft)-high mock-up piles located above water. Rigid rectangular forms were erected around the 203-mm (8-in.)-square mock-up piles. The resulting annular spacings between these forms and the mock-up piles were first filled with water and then with concrete. The concrete was discharged within previously placed unhardened concrete to minimize segregation and water dilution rather than allowed to fall through water. Once the repair had set, the exposed surface of each underwater-cast pile was examined for any signs of segregation. Cores were obtained to evaluate the in-situ density and compressive strength of the concrete, as well as the bond strength between the underwater-cast concrete and the central mock-up pile. The testing program indicates that concrete mixtures containing antiwashout admixtures and either silica fume or fly ash can secure higher quality repairs, at equal or lower costs, than similar concretes made with high silica fume or high cement contents and no antiwashout admixtures. Properly proportioned concrete mixtures resulted in exposed repair surfaces free of segregation, with mean in-place compressive strength in excess of 58.6 MPa (8500 psi). The in-situ density of such concrete was identical to that cast and consolidated above water, and the bond strength to existing mock-up piles was in excess of 2.1 MPa (300 psi).
Evaluation Of Concrete Mixtures For Use In Underwater Repairs
DOWNLOAD
Author : Billy D. Neeley
language : en
Publisher:
Release Date : 1988
Evaluation Of Concrete Mixtures For Use In Underwater Repairs written by Billy D. Neeley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Concrete categories.
Laboratory Evaluation Of Concrete Mixtures And Techniques For Underwater Repairs
DOWNLOAD
Author : Billy D. Neeley
language : en
Publisher:
Release Date : 1990
Laboratory Evaluation Of Concrete Mixtures And Techniques For Underwater Repairs written by Billy D. Neeley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Concrete categories.
Repair Evaluation Maintenance And Rehabilitation Research Program Evaluation Of Concrete Mixtures For Use In Underwater Repairs
DOWNLOAD
Author : Billy D. Neeley
language : en
Publisher:
Release Date : 1988
Repair Evaluation Maintenance And Rehabilitation Research Program Evaluation Of Concrete Mixtures For Use In Underwater Repairs written by Billy D. Neeley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with categories.
Concrete mixtures were evaluated to determine which were most suited for placement underwater in thin lifts. The concretes were proportioned to have good workability, good abrasion erosion resistance, and good resistance to washing out of the cement paste. High-range water reducers (HRWR) were used to increase the workability and permit the use of low water cement ratios (W/C) to increase the resistance to abrasion erosion. Low W/C, silica fume, and antiwashout admixtures (AWA) were used to increase the resistance to washout. A washout test was used to determine the relative amount of cement paste lost when the concrete is exposed to a large volume of water. The two-point workability test was used to evaluate the relative workability properties of each mixture. The slump and air content were also measured for most of the mixtures. The test method for abrasion erosion resistance of concrete (underwater method) was used to determine the abrasion erosion resistance of each mixture. The results of these tests were used to determine the combination of materials necessary to produce concrete with the desired properties. Significant correlations that exist between the two-point measurements and washout measurements were examined. The effects that W/C, HRWR's, AWA's, fly ash, and silica fume have upon washout resistance and abrasion-erosion resistance were examined.
Evaluation Of Concrete Mixtures For Use In Underwater Repairs
DOWNLOAD
Author : Billy Dale Neeley
language : en
Publisher:
Release Date : 1988
Evaluation Of Concrete Mixtures For Use In Underwater Repairs written by Billy Dale Neeley and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Concrete categories.
Repair Evaluation Maintenance And Rehabilitation Research Program Laboratory Evaluation Of Concrete Mixtures And Techniques For Underwater Repairs
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 1990
Repair Evaluation Maintenance And Rehabilitation Research Program Laboratory Evaluation Of Concrete Mixtures And Techniques For Underwater Repairs written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Concrete mixtures were placed underwater using six placement techniques to (a) examine the cohesive and flow parameters of selected concrete mixtures under different placement situations, (b) estimate those parameters necessary for successful underwater placement, (c) examine the quality of bonding of the repair concrete to the existing concrete, and (d) examine the effect of underwater placement upon the abrasion resistance of the concrete. A washout test was used to determine the relative amount of cement paste lost when the concrete is exposed to a large volume of water. The two-point workability test was used to evaluate the relative workability properties of the concrete. The slump, tremie flow, and air content were also measured. The test method for abrasion-erosion resistance of concrete (underwater method) was used to determine the abrasion-erosion resistance of each concrete. A point-load test for tensile strength was used to determine the bond strength of the repair concrete to the existing concrete.
Mechanical Properties Of Self Compacting Concrete
DOWNLOAD
Author : Kamal H. Khayat
language : en
Publisher: Springer Science & Business Media
Release Date : 2014-02-05
Mechanical Properties Of Self Compacting Concrete written by Kamal H. Khayat and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-02-05 with Technology & Engineering categories.
The State-of-the-Art Report of RILEM Technical Committee 228-MPS on Mechanical properties of Self-Compacting Concrete (SCC) summarizes an extensive body of information related to mechanical properties and mechanical behaviour of SCC. Due attention is given to the fact that the composition of SCC varies significantly. A wide range of mechanical properties are considered, including compressive strength, stress-strain relationship, tensile and flexural strengths, modulus of elasticity, shear strength, effect of elevated temperature, such as fire spalling and residual properties after fire, in-situ properties, creep, shrinkage, bond properties and structural behaviour. A chapter on fibre-reinforced SCC is included, as well as a chapter on specialty SCC, such as light-weight SCC, heavy-weight SCC, preplaced aggregate SCC, special fibre reinforced SCC and underwater concrete.
Evaluation Of Admixtures For Use In Concrete To Be Placed Underwater
DOWNLOAD
Author : William O. Tynes
language : en
Publisher:
Release Date : 1976
Evaluation Of Admixtures For Use In Concrete To Be Placed Underwater written by William O. Tynes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Concrete categories.
The Design And Application Of Controlled Low Strength Materials Flowable Fill
DOWNLOAD
Author : Amster K. Howard
language : en
Publisher: ASTM International
Release Date : 1998
The Design And Application Of Controlled Low Strength Materials Flowable Fill written by Amster K. Howard and has been published by ASTM International this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Controlled low-strength materials categories.
Focuses on a type of material mainly used in place of compacted backfill for pipe embedment and backfill, but gaining widely in applications. It is a mixture of cementitious material, soil, water, and sometimes fly ash and admixtures. Here 26 papers, from a June 1997 symposium in St. Louis, Missouri, describe new design procedures, new applications, and installation innovations in order to help assess the need for new or revised standards. They cover ingredients, properties, test methods, standards and specifications, case histories, and pipeline applications. The five current standards are appended. Annotation copyrighted by Book News, Inc., Portland, OR
Underwater Bridge Maintenance And Repair
DOWNLOAD
Author : Ronald L. Purvis
language : en
Publisher:
Release Date : 1994
Underwater Bridge Maintenance And Repair written by Ronald L. Purvis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Bridges categories.
This synthesis on underwater bridge maintenance and repair will be of special interest to bridge maintenance engineers and others involved with repair of bridge elements located below the waterline and in the splash zone. Procedures for correctly assessing the problem and engineering the repair within the constraints of individual situations, including bridge scour considerations, are described. Protection, maintenance, and repair of concrete, masonry, steel, and timber bridge foundation elements are also addressed. This synthesis updates the maintenance and repair portion of NCHRP Synthesis 88: Underwater Inspection and Repair of Bridge Substructures. This report of the Transportation Research Board identifies and describes current practices and innovative repair techniques for problems associated with settlement, scour, and deterioration of underwater bridge elements. The synthesis considers various types of protection, maintenance, and repair work on bridge substructures, both underwater and in the splash zone, and includes techniques, and their effectiveness. Current research in the topic area and critical research needs are also identified. A limited bibliography is also provided.