10 Matching Results

Search Results

Advanced search parameters have been applied.
in publisher: "Portland Cement Association, Skokie, IL USA. Construction Technology Labs."  
Results: 1 - 10
open access

Strength and elastic properties of concretes from waste tank farms

Description: Tests were conducted on concretes from Hanford Waste Tank Farms, and on concrete cast by the Portland Cement Association using Hanford mix designs and materials. Elastic modulus (static method), Poisson's ratio, and compressive and splitting tensile strengths were determined at room temperature, and for specimens maintained at 250F for varying lengths of time. Variables examined were temperature, length of exposure to elevated temperature, and geometry of test specimens. Compressive strength ge… more
Date: December 1, 1978
Creator: Gillen, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phase I: energy conservation potential of Portland Cement particle size distribution control. Progress report, November 1978-January 1979

Description: Progress is reported on the energy conservation potential of Portland cement particle size distribution control. Results of preliminary concrete tests, Series IIIa and Series IIIb, effects of particle size ranges on strength and drying shrinkage, are presented. Series IV, effects of mixing and curing temperature, tests compare the properties of several good particle size controlled cements with normally ground cements at low and high temperatures. The work on the effects of high alkali and high… more
Date: March 1, 1979
Creator: Helmuth, R.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Creep and cycling tests: thermal properties of Hanford concretes. [79 to 1175/sup 0/F]

Description: Four tests were conducted to determine thermal properties of concrete core material from the Purex Building at Hanford, Washington, and from concrete cast at the Portland Cement Association. Specific heat, thermal conductivity, and thermal diffusivity were measured as functions of temperature from 79 to 1175F.
Date: March 1, 1979
Creator: Gillen, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Elastic and strength properties of Hanford concrete mixes at room and elevated temperatures

Description: The effects of long-term exposure to elevated temperatures on the physical properties of concrete mixes used in Hanford radioactive waste storage tanks were determined. Temperature had a significant effect on the elastic modulus of concretes. Poisson's ratio determined by the sonic method remained relatively constant. The splitting tensile strength increased rapidly up to 190 days of age. Then strength decreased to about 350 days and either leveled off or increased from that point on. Comp… more
Date: March 1, 1979
Creator: Abrams, M. S.; Gillen, M. & Campbell, D. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Expansion of Hanford concrete

Description: This report presents results of measurements of thermal expansion of concrete cores from Hanford, Washington facilities, and concrete cast at the Construction Technology Laboratories of Portland Cement Association (CTL/PCA). Thermal expansion was measured from room temperature to 1600/sup 0/F on 0.5 x 3.0-in. specimens heated at a rate of 10/sup 0/F/min. Specimens were cored from concrete cylinders cast at CTL/PCA in 1975 and 1977, and from cylindrical cores taken from the Purex Building and Wa… more
Date: October 1, 1978
Creator: Gillen, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Phase I: energy-conservation potential of Portland cement particle-size-distribution control. Final report, March 1979

Description: The properties of cements with carefully controlled particle-size distributions were compared with those of normally ground cements having a Blaine fineness of about 3600 cm/sup 2//g. Progressive reduction of the maximum particle size to 20 microns improved strength development. Further reduction to about 14 microns decreased rather than improved strength development. Some of these particle-size-controlled cements produce as-high, and often much-higher, strengths at ages from 1 to 60 days at Bl… more
Date: March 1, 1979
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of precalciners to remove alkali from raw material in the cement industry. Quarterly technical progress report, November 1978-January 1979

Description: The attached reports deal with the results of: (1) a literature survey on the general topics of alkali volatilization and heat transfer in cement manufacturing systems, (2) a survey of on-line gas analysis techniques for alkalies, sulfur and chlorine, and (3) a series of high-temperature burns of selected ground argillaceous minerals with various chloride-containing admixtures. Little further information regarding the volatility of alkalies in pure minerals was found. The survey of on-line gas … more
Date: February 1, 1979
Creator: Gartner, Ellis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of precalciners to remove alkali from raw materials in the cement industry. Quarterly technical progress report, November 1979-January 1980

Description: Experiments using the sulfate fusion technique have continued. High degrees of alkali removal have been achieved using CaSO/sub 4/ admixtures with added CaCl/sub 2/ and Mg(NO/sub 3/)/sub 2/. The presence of Mg/sup 2 +/ or Cl/sup -/ in the mixtures did not affect the phase separation significantly. There was considerable evidence for preferential migration of K/sup +/ into the sulfate phase, relative to Na/sup +/. A new technique, the powder drop method, was used to attempt to more closely simul… more
Date: March 1, 1980
Creator: Gartner, Ellis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of precalciners to remove alkali from raw material in the cement industry. Quarterly technical progress report, May-June 1979

Description: Tests were made to determine the best method for volatilizing the alkalis in high-alkali clays, feldspars, and similar argillaceous materials. MgCl/sub 2/ was more effective in removing alkalis from feldspars than from the other minerals. Reducing conditions (graphite + CaCO/sub 3//CaCl/sub 2/) increased alkali volatility slightly exept in the case of illite. Water vapor had a negative effect. FeCl/sub 3/.6H/sub 2/O is not a very effective additive. Alkalis can be removed rapidly by heating to … more
Date: August 1, 1979
Creator: Gartner, Ellis M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Normal and refractory concretes for LMFBR applications. Volume 2. Evaluation of concretes for LMFBR applications. Final report

Description: The extensive literature on the properties and behavior at elevated temperature of portland cement concrete and various refractory concretes was reviewed to collect in concise form the physical and chemical properties of castable refractory concretes and of conventional portland cement concretes at elevated temperature. This survey, together with an extensive bibliography of source documents, is presented in Volume 1. A comparison was made of these properties, the relative advantages of the var… more
Date: June 1, 1982
Creator: Bazant, Z. P.; Chern, J. C.; Abrams, M. S. & Gillen, M. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen