Interrelations Between Cement and Concrete Properties PDF Download
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Author: Raymond Leonard Blaine
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 52
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Book Description
Author: Raymond Leonard Blaine
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 52
Get Book Here
Book Description
Author: Raymond Leonard Blaine
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 54
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Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Building
Languages : en
Pages : 860
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Book Description
Author:
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 24
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Book Description
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 858
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Book Description
Author: William C. Cullen
Publisher:
ISBN:
Category : Building materials
Languages : en
Pages : 28
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Book Description
The resistance of bituminous built-up roofing membranes to thermally induced forces is considered in terms of their strength properties such as breaking load in tension, modulus of elongation and apparent linear thermal expansion coefficient.The development of a Thermal-Shock Resistance Factor is described and values are given for three bituminous built-up membranes at temperatures of - 30F (-34.4C), 0F (-17.8C), 30F (-1.1C) and 73F (22.8C).The apparent relation between the values obtained in the laboratory and the observed performance of roofing membranes in service is considered.The utilization of the Thermal-Shock Resistance Factor in the reduction of potential failures of bituminous built-up roofing membranes in service from thermally induced forces is also discussed.(Author).
Author: Perry H. Petersen
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 24
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Book Description
The loss of prestress resulting from creep and shrinkage in concrete was investigated for concrete specime * ns made with Type I portland cement and with Type III portland cement.Forty-nine sets of specimens were fabricated and tested; each set consisted of a prestressed specimen and an otherwise identical companion specimen without reinforcement. The length changes with time were observed at intervals up to an age of 500 days.These observations were made for concretes subjected to different levels of prestress, and for concretes prestressed at different ages.Length changes in nonreinforced companion specimens were also obtained. Thus this study is concerned with elastic deformation occurring at time of stress transfer, shrinkage or swelling, and creep.(Author).
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 172
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Book Description
Author: United States. National Bureau of Standards
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 172
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Book Description
Author: David Watstein
Publisher:
ISBN:
Category : Architecture
Languages : en
Pages : 20
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Book Description
The eccentricity of the loads applied to a specially calibrated compressive strut simulating a brick bearing wall was experimentally determined for a variety of bearing materials and conditions of contact. In one series of tests, an I-beam was bedded in high strength gypsum plaster, bonded and unbonded. For the unbonded plaster bed the eccentricity ratio increased with the applied load to a maximum value of about 0.42, while for the bonded plaster bearing this ratio decreased to an average value of about 0.24 at the maximum load. In the second series of tests the eccentricity was observed for an I-beam supported on neoprene rubber pads, capped and uncapped, of different thicknesses, and of different bearing length. In general the eccentricity ratio increased slightly with the applied load. Lack of intimate contact between the I-beam and the rubber pad 1/8 in. thick resulted in an eccentricity ratio of about 0.40, or nearly the same as for unbonded plaster bearing. Intimacy of contact produced by plaster capping resulted in a marked reduction in the eccentricity ratio to about 0.29; the confinement of the bearing length of the rubber pad to one-half of that used in previous tests and placing it at the extreme end of the beam, further reduced the eccentricity ratio to about 0.18, and to 0.13 for a rubber pad 0.25 in. thick. (Author).
