Download or read book Investigation of Iowa Portland Cement Material written by and published by . This book was released on 1913 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of the Manufacture and Testing of Portland Cement from Iowa Materials written by Harry L. Moore and published by . This book was released on 1906 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Iowa Cement Material written by C. C. Clausen and published by . This book was released on 1907 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Supplementary Report on Portland Cement Materials in Iowa written by Samuel Walker Beyer and published by . This book was released on 1906 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Investigation of Portland Cement Concrete Utilizing 70 Class V Aggregate and 30 Calcareous Coarse Aggregate written by Terry Legvold and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Study of Portland Cement Maintenance Mix and Set Accelerators written by Don Johannsen and published by . This book was released on 1970 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The First 5 Years April 2000 March 2005 written by Iowa State University. Center for Portland Cement Concrete Pavement Technology and published by . This book was released on 2005 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses the accomplishments of the Center for Portland Cement Concrete Pavement Technology (PCC Center) at Iowa State University, which was founded in April 2000. The report discusses the advisory groups that guide the Center, and describes the facilities included in the Center. The two Center facilities are the PCC Pavement and Materials Research Laboratory and the Mobile Concrete Research Lab. The report details the combined test capability of the Center's two labs, and describes the research undertaken at the Center. Also included in the publication are long-term planning efforts and technology transfer studies.
Download or read book Estimation of the Consituents of Portland Cement Concrete written by George Wilbur Burke and published by . This book was released on 1923 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Task 4 written by Kejin Wang and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The present research project was designed to identify the typical Iowa material input values that are required by the Mechanistic-Empirical Pavement Design Guide (MEPDG) for the Level 3 concrete pavement design. It was also designed to investigate the existing equations that might be used to predict Iowa pavement concrete for the Level 2 pavement design. In this project, over 20,000 data were collected from the Iowa Department of Transportation (DOT) and other sources. These data, most of which were concrete compressive strength, slump, air content, and unit weight data, were synthesized and their statistical parameters (such as the mean values and standard variations) were analyzed. Based on the analyses, the typical input values of Iowa pavement concrete, such as 28-day compressive strength, splitting tensile strength, elastic modulus, and modulus of rupture, were evaluated. The study indicates that the 28-day MOR of Iowa concrete is 646 +- 51 psi, very close to the MEPDG default value (650 psi). The 28-day Ec of Iowa concrete (based only on two available data of the Iowa Curling and Warping project) is 4.82 +- 0.28x10 to the 6th psi, which is quite different from the MEPDG default value (3.93 x 10 to the 6th psi) ; therefore, the researchers recommended re-evaluating after more Iowa test data become available. The drying shrinkage of a typical Iowa concrete (C-3WR-C20 mix) was tested at Concrete Technology Laboratory (CTL). The test results show that the ultimate shrinkage of the concrete is about 454 microstrain and the time for the concrete to reach 50% of ultimate shrinkage is at 32 days; both of these values are very close to the MEPDG default values. The comparison of the Iowa test data and the MEPDG default values, as well as the recommendations on the input values to be used in MEPDG for Iowa PCC pavement design, are summarized in Table 20 of this report. The available equations for predicting the above-mentioned concrete properties were also assembled. The validity of these equations for Iowa concrete materials was examined. Multiple-parameters nonlinear regression analyses, along with the artificial neural network (ANN) method, were employed to investigate the relationships among Iowa concrete material properties and to modify the existing equations so as to be suitable for Iowa concrete materials. However, due to lack of necessary data sets, the relationships between Iowa concrete properties were established based on the limited data from CP Tech Center's projects and ISU classes only. The researchers suggest that the resulting relationships be used by Iowa pavement design engineers as references only. The present study furthermore indicates that appropriately documenting concrete properties, including flexural strength, elastic modulus, prediction equations for concrete pavement design in the future.
Download or read book PCC Pavement Materials Research Lab written by and published by . This book was released on 2008 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Portland Cement Concrete (PCC) Pavement and Materials Research Laboratory, housed in 138 Town Engineering at Iowa State University, supports the state of Iowa's national leadership role in PCC pavement research innovations. Funded primarily by the Iowa Concrete Paving Association, with help from Iowa State University, the lab also provides graduate students with opportunities to study and conduct research related to PCC pavements. The 2,600 square foot research lab helps researchers discover practical solutions to challenges faced by Iowa's and the nation's concrete paving industry. The lab also enhances Iowa's ability to win nationally competitive research projects, which ultimately benefits Iowa's concrete paving community and motoring public. Fully equipped with state-of-the-art laboratory equipment and furniture, the facility provides four major spaces for concrete mixing and processing, mechanical testing of hardened concrete, fresh concrete property measurement, and durability-related experiments. When the PCC Lab opened in 2001, Iowa State became one of only a few universities with an entire PCC research center under one roof.
Download or read book Evaluation of the Chemical Durability of Iowa Fly Ash Concretes written by Scott Michael Schlorholtz and published by . This book was released on 1991 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: The major objective of this research project is to investigate how fly ash influences the chemical durability of portland cement based materials. The testing program is evaluating how Iowa fly ashes influence the sulfate durability of portland cement-fly ash pastes, mortars, and concretes. Also, alkali-reactivity studies are being conducted on mortar bar specimens prepared in accordance with ASTM C311. Preliminary sulfate test results, based only on mortar bar studies, indicate that only the very high-calcium fly ash (29 percent CaO, by weight) consistently reduced the durabiity of test specimens exposed to a solution containing 5 percent sodium sulfate. The remaining four fly ashes that were used in the study showed negligible to dramatic increases in sulfate resistance. Concrete specimens were only beginning to respond to the sulfate solutions after about one year of exposure; and hence, considerably more time will be needed to assess their performance. Preliminary results from the alkali-reactivity tests have indicated that the Oreopolis aggregate is not sensitive to alkali attack. However, some of the test results have indicated that the testing procedure may be prone to delayed expansion due to the presence of periclase (MgO) in the Class C fly ashes. Research is being planned to: (1) verify if the periclase is influencing test results; and (2) estimating the magnitude of the potential error.
Download or read book Portland Cement written by Charles Davis Jameson and published by . This book was released on 1895 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Iowa Geological Survey Vol 16 written by Frank a Wilder and published by Forgotten Books. This book was released on 2017-12-09 with total page 714 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from Iowa Geological Survey, Vol. 16: Annual Report, 1905, With Accompanying Papers Portland cement: - A year ago the Survey published its first preliminary report on Portland Cement Materials, written by Eckels and Bain. This report showed that without question Iowa has an abundance oi' high grade material suitable for Portland cement. It was sent about the state generally, to the 1ndustria1 agents of the various railroads entering the state, and to the cement experts and engineers throughout the country. As a consequence two months had not elapsed before the Industrial agent of the Illinois Central railroad brought into the state parties who desired to locate a large cement mill in Iowa if suitable conditions could be found. Fort Dodge was first visited and careful tests were made of the lime stones and shales to determine their quality and quantity. At this point material of admirable quality was found, but the quantity that could be readily obtained did not meet the requirements of the large mill that was proposed. The con ditions at Mason City were later examined and all of the requirements were met by the limestones and shales that are abundant, not only at that point but at a great number of localities in Cerro Gordo county. When the Geological work on this county was completed by Professor Calvin in 1897, atten tion was called to the abundance of cement materials; the ease with which they could be secured; and their probable chemical fitness. At that time the dry process for making cement had not come to the front and the development of the situation has waited till this time. During the past summer Professor Beyer, who is preparing a monograph on Portland Cement for the. Iowa Geological Survey, investigated the conditions at Mason City, secured material for analysis and directed the tests which enable the Survey to endorse the Mason City project. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Download or read book Investigation of Cement replacement Materials written by Waterways Experiment Station (U.S.) and published by . This book was released on 1955 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Synthetic Tanning Materials written by Edward Wolesensky and published by . This book was released on 1926 with total page 996 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Portland Cement Materials and Industry in the United States written by Edwin Clarence Eckel and published by . This book was released on 1913 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Survey Bulletin written by and published by . This book was released on 1959 with total page 1160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
