Download or read book Methods of Preparing Horizontal Construction Joints in Mass Concrete written by Billy D. Neeley and published by Washington, DC : U.S. Army Corps of Engineers. This book was released on 1996 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods of Preparing Horizontal Construction Joints in Mass Concrete written by Billy D. Neeley and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1959 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods of Preparing Horizontal Construction Joints in Mass Concrete Report 2 Minimizing Laitance written by Neeley, Billy D and published by Washington, DC : U.S. Army Corps of Engineers. This book was released on 1998 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a research program examining the effects of different methods of preparing horizontal construction joints in mass concrete construction. The purpose of the research program was to confirm existing guidance or, if necessary, update it. This is the second and final report. The joint moisture conditions at the time of concrete placement were: (a) continuously moist, (b) dry, and (c) dry and then remoistened. There was no cleaning of the joint surface prior to placement of a second lift. The concrete mixture used in the first lift was proportioned to minimize bleeding and the resulting laitance. Jointed specimens were tested for direct tensile strength and shear strength. The results indicated that an addition of a small quantity of silica fume does decrease bleeding and reduce loose, flaky laitance. However, a smooth, somewhat glassy surface appears to interfere with the bonding of the next lift of concrete. Bond strengths are not as good as those when the horizontal construction joints are cleaned by high-pressure water cutting or by air-water cutting, and then allowed to dry approximately 24 hr immediately prior to placement of the next lift of concrete. This technique is not recommended. Current guidance concerning joint cleaning procedures should be followed.

Download or read book Methods of Preparing Horizontal Construction Joints in Mass Concrete Report 2 Minimizing Laitance written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a research program examining the effects of different methods of preparing horizontal construction joints in mass concrete construction. The purpose of the research program was to confirm existing guidance or, if necessary, update it. This is the second and final report. The joint moisture conditions at the time of concrete placement were: (a) continuously moist, (b) dry, and (c) dry and then remoistened. There was no cleaning of the joint surface prior to placement of a second lift. The concrete mixture used in the first lift was proportioned to minimize bleeding and the resulting laitance. Jointed specimens were tested for direct tensile strength and shear strength. The results indicated that an addition of a small quantity of silica fume does decrease bleeding and reduce loose, flaky laitance. However, a smooth, somewhat glassy surface appears to interfere with the bonding of the next lift of concrete. Bond strengths are not as good as those when the horizontal construction joints are cleaned by high-pressure water cutting or by air-water cutting, and then allowed to dry approximately 24 hr immediately prior to placement of the next lift of concrete. This technique is not recommended. Current guidance concerning joint cleaning procedures should be followed.

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete written by William O. Tynes and published by . This book was released on 1973 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete written by Waterways Experiment Station (U.S.) and published by . This book was released on 1963 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete written by James E. McDonald and published by . This book was released on 1966 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete written by William O. Tynes and published by . This book was released on 1973 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete written by James E. McDonald and published by . This book was released on 1966 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Methods of Preparing Horizontal Construction Joints in Concrete Report 4 Evaluation of High Pressure Water Jet and Joint Preparation Procedures written by William O. Tynes and published by . This book was released on 1973 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report discusses procedures for preparation of horizontal construction joints using a high-pressure water jet, to compare these procedures with the alternative practice of wet sand-blasting, and to develop additional information on procedures and methods that have been used in horizontal construction joint practice. The investigation is divided into two phases, laboratory and field. One 6-in. maximum size crushed limestone aggregate concrete mixture, with a cement content of 235 lb/cu yd, an air content of 6 plus or minus percent, and a slump of 2 plus or minus 1/2 in. on the portion of the mixture passing the 1-1/2-in. sieve, was used to cast specimens for both phases. (Modified author abstract).

Download or read book ACI Manual of Concrete Practice written by American Concrete Institute and published by . This book was released on 2002 with total page 988 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book List of Publications of the U S Army Engineer Waterways Experiment Station written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1975 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Boulder Canyon Project written by and published by . This book was released on 1949 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Publications Available for Purchase U s Army Engineer Waterways Experiment Station and Other Corps of Engineers Agencies written by and published by . This book was released on 1969 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contents: Reports from U.S. Army Engineer Waterways Experiment Station and St. Paul District Hydraulic Laboratory; Reports published and distributed by Waterways Experiment Station for other Corps of Engineers agencies; Engineer manuals.

Download or read book Annual Summary of Investigations in Support of the Civil Works Program written by Waterways Experiment Station (U.S.) and published by . This book was released on 1961 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Analysis and Design Practice of Hydraulic Concrete Structures written by KARUNA MOY GHOSH and published by PHI Learning Pvt. Ltd.. This book was released on 2013-01-14 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive description of the analysis and design process of some hydraulic concrete structures designed to retain and contain aqueous liquid. The first edition discussed six types of structures of different functions, namely: (a) An underground sedimentation tank for sewage treatment.(b) An underground digestion tank for sludge treatment.(c) An underground reservoir to store fresh potable water.(d) An immersed highway tunnel under the river bed.(e) An indoor swimming pool of rectangular shape for public recreation.(f) A gravity dam across a valley for converting the valley into a fresh water reservoir. This Second Edition incorporates another type of hydraulic structure, namely spillway. The spillway structure plays a vital role in regulating the designed reservoir water level to meet the fluctuating demand of water supply for the generation of hydroelectricity, irrigation and water supply purposes in controlling the height of reservoir water level downstream of the river. The spillway structure subjected to seismic hydrodynamic pressure in addition to the hydrostatic pressure, has been analysed and designed in full compliance with Eurocodes EC 2: Part 1–1 and Part 3 as water-retaining structure. The other six structures have been analysed and designed with reference to the relevant clauses of codes of practice prescribed in Eurocodes 2 and BS 8007 and BS 8110. The book is designed to serve as a useful practical guide and a valuable reference for senior undergraduate students of civil engineering and postgraduate students specializing in structural design, as well as practising and consulting engineers involved in the design and execution of hydraulic concrete structures.