Author: Billy D. Neeley
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 66

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Book Description

Author: Billy D. Neeley
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 96

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Book Description

Author: K. L. Saucier
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 52

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Book Description

Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 62

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Book Description
This report presents the results of a research program examining the potential benefits of requiring minimum and maximum mortar contents for 37.5 mm (1-1/2 in.) nominal maximum size aggregate (NMSA) mass concrete and minimum and maximum paste-mortar ratios for 37.5 mm (1-1/2 in.) NMSA mass concrete. The purpose of the research program was to supplement existing guidance on proportioning mass concrete mixtures. Two 37.5 mm (1-1/2-in.) nominal maximum size (NMS) coarse aggregates were used. One was a crushed material consisting primarily of blocky particles. The other was a crushed material having more flat and elongated particles. All mixtures contained natural fine aggregate. The results indicate that a recommended minimum and maximum mortar content could be a useful guide to aid in proportioning workable mass concrete mixtures containing 37.5 mm (1-1/2-in.) NMS coarse aggregate. An approximate minimum and maximum mortar content was identified for mixtures containing favorably shaped coarse aggregate particles (primarily blocky with minimal flat and elongated) and for mixtures containing less favorably shaped coarse aggregate particles (higher percentage of flat and elongated). The paste-mortar ratio appears to be less useful. Recommendations are made to consider supplementing existing guidance on proportioning 37.5-mm (1-1/2-in.) NMSA mass concrete mixtures with minimum and maximum mortar contents.

Author: Zhu Bofang
Publisher: Butterworth-Heinemann
ISBN: 0124078540
Category : Technology & Engineering
Languages : en
Pages : 525

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Book Description
Methods of controlling mass concrete temperatures range from relatively simple to complex and from inexpensive too costly. Depending on a particular situation, it may be advantageous to use one or more methods over others. Based on the author’s 50 years of personal experience in designing mass concrete structures, Thermal Stresses and Temperature Control of Mass Concrete provides a clear and rigorous guide to selecting the right techniques to meet project-specific and financial needs. New techniques such as long time superficial thermal insulation, comprehensive temperature control, and MgO self-expansive concrete are introduced. Methods for calculating the temperature field and thermal stresses in dams, docks, tunnels, and concrete blocks and beams on elastic foundations Thermal stress computations that take into account the influences of all factors and simulate the process of construction Analytical methods for determining thermal and mechanical properties of concrete Formulas for determining water temperature in reservoirs and temperature loading of arched dams New numerical monitoring methods for mass and semi-mature aged concrete

Author: William O. Tynes
Publisher:
ISBN:
Category : Air-entrained concrete
Languages : en
Pages : 114

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Book Description

Author: William O. Tynes
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 52

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Book Description

Author: William O. Tynes
Publisher:
ISBN:
Category : Aggregates (Building materials).
Languages : en
Pages : 44

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Book Description
The purpose of the investigation was to either validate or disprove the assumption that a water-cement ratio (W/C) in excess of 0.8 by weight for interior concrete containing 4-1/2-in. maximum size aggregate can be used in mass concrete construction, and to compare the properties of concrete containing 4-1/2-in. maximum size aggregate with those of the concretes containing 3- and 6-in. maximum size aggregates. The investigation consisted of a laboratory test program in which a series of six lean mass concrete mixtures, both with and without pozzolan, containing 4-1/2-in. maximum size aggregate were proportioned with identical W/C's that had been selected from the work of a previous investigation. Specimens were cast and tests were made to evaluate the mixtures for workability, strength, permeability, and durability.

Author: Mostafa Mohamed Ragab
Publisher:
ISBN:
Category : High strength concrete
Languages : en
Pages : 196

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Book Description

Author: Waterways Experiment Station (U.S.)
Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 22

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Book Description