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Ammonium Phosphate Fly Ash Road Base Construction
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Book Synopsis Ammonium Phosphate/fly Ash Road Base Construction by : Del Jespersen
Download or read book Ammonium Phosphate/fly Ash Road Base Construction written by Del Jespersen and published by . This book was released on 1987 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Field evaluation following laboratory work which "suggested that ammonium phosphate-treated fly ash (APFA) may be as much as three times more cost effective than portland cement-treated base courses." Study also determines "whether low cost aggregates such as crusher fines or unprocessed sands can be used with APFA"--Introduction.
Book Synopsis Ammonium Phosphate/fly Ash Road Base Construction by : Gary K. Harris
Download or read book Ammonium Phosphate/fly Ash Road Base Construction written by Gary K. Harris and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research project was to evaluate the construction and service performance of ammonium phosphate/fly ash (APFA) treated base courses of crushed fines and/or unprocessed sand. Specific test results related to construction of the test sections were included in the 1987 construction report by Iowa State University. The performance of the experimental sections is dealt with in this final report. This 1986 project demonstrated that in all cases the control sections utilizing a Type B base experienced dramatically less cracking in the surface than the APFA treated base sections. The cost per mix and subsequent surface maintenance costs for the APFA base sections, especially those having a substantial amount of limestone, were higher than the Type B base control sections. This type of construction may prove to be economical only when petroleum product costs escalate.
Book Synopsis Ammonium Phosphate/fly Ash Road Base Construction by : Gary K. Harris
Download or read book Ammonium Phosphate/fly Ash Road Base Construction written by Gary K. Harris and published by . This book was released on 1993 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research project was to evaluate the construction and service performance of ammonium phosphate/fly ash (APFA) treated base courses of crushed fines and/or unprocessed sand. Specific test results related to construction of the test sections were included in the 1987 construction report by Iowa State University. The performance of the experimental sections is dealt with in this final report. This 1986 project demonstrated that in all cases the control sections utilizing a Type B base experienced dramatically less cracking in the surface than the APFA treated base sections. The cost per mix and subsequent surface maintenance costs for the APFA base sections, especially those having a substantial amount of limestone, were higher than the Type B base control sections. This type of construction may prove to be economical only when petroleum product costs escalate.
Download or read book Fly Ash in Concrete written by K. Wesche and published by CRC Press. This book was released on 1991-06-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a state-of-the-art report which documents current knowledge on the properties of fly ash in concrete and the use of fly ash in construction. It includes RILEM Recommendations on fly ash in concrete and a comprehensive bibliography including over 800 references.
Book Synopsis Fly Ash Facts for Highway Engineers by : American Coal Ash Association
Download or read book Fly Ash Facts for Highway Engineers written by American Coal Ash Association and published by . This book was released on 1995 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: Coal fly ash is a coal combustion by-product (CCB) that has numerous applications as an engineering material; the annual production of CCBs is nearly 82 million metric tons (90 million tons). Since the first edition of this publication in 1986, substantial information has been accumulated regarding the use of fly ash. The purpose of this document is to provide technical information about engineering applications to potential users of CCBs and to advance the use of CCBs in ways that are technically sound, commercially competitive, and environmentally safe.
Book Synopsis The Use of Fly Ash in Highway Construction by : Vernon J. Marks
Download or read book The Use of Fly Ash in Highway Construction written by Vernon J. Marks and published by . This book was released on 1990 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1982 the Iowa DOT allowed a successful bidder the option of submitting materials and proportions using fly ash to produce a portland cement concrete (PCC) paving mixture to meet a specified compressive strength. The contractor, Irving F. Jensen, received approval for the use of a concrete mixture utilizing 500 lbs. of portland cement and 88 lbs. of fly ash as a replacement of 88 lbs. of portland cement. The PCC mixture was utilized on the Muscatine County US 61 relocation bypass paved as project F-61-4(32)--20-70. A Class "C" fly ash obtained from the Chillicothe electric generating plant approximately 100 miles away was used in the project. This use of fly ash in lieu of portland cement resulted in a cost savings of $64,500 and an energy savings of approximately 16 billion BTU. The compressive strength of this PCC mixture option was very comparable to concrete mixtures produced without the use of fly ash. The pavement has been performing very well. The substitution of fly ash for 15% of the cement has been allowed as a contractor's option since 1984. Due to the cost savings, it has been used in almost all Iowa PCC paving since that time.
Book Synopsis Optimization of Soil Stabilization with Class C Fly Ash by : John Michael Pitt
Download or read book Optimization of Soil Stabilization with Class C Fly Ash written by John Michael Pitt and published by . This book was released on 1987 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Previous Iowa DOT sponsored research has shown that some Class C fly ashes are ementitious (because calcium is combined as calcium aluminates) while other Class C ashes containing similar amounts of elemental calcium are not (1). Fly ashes from modern power plants in Iowa contain significant amounts of calcium in their glassy phases, regardless of their cementitious properties. The present research was based on these findings and on the hyphothesis that: attack of the amorphous phase of high calcium fly ash could be initiated with trace additives, thus making calcium available for formation of useful calcium-silicate cements. Phase I research was devoted to finding potential additives through a screening process; the likely chemicals were tested with fly ashes representative of the cementitious and non-cementitious ashes available in the state. Ammonium phosphate, a fertilizer, was found to produce 3,600 psi cement with cementitious Neal #4 fly ash; this strength is roughly equivalent to that of portland cement, but at about one-third the cost. Neal #2 fly ash, a slightly cementitious Class C, was found to respond best with ammonium nitrate; through the additive, a near-zero strength material was transformed into a 1,200 psi cement. The second research phase was directed to optimimizing trace additive concentrations, defining the behavior of the resulting cements, evaluating more comprehensively the fly ashes available in Iowa, and explaining the cement formation mechanisms of the most promising trace additives. X-ray diffraction data demonstrate that both amorphous and crystalline hydrates of chemically enhanced fly ash differ from those of unaltered fly ash hydrates. Calciumaluminum- silicate hydrates were formed, rather than the expected (and hypothesized) calcium-silicate hydrates. These new reaction products explain the observed strength enhancement. The final phase concentrated on laboratory application of the chemically-enhanced fly ash cements to road base stabilization. Emphasis was placed on use of marginal aggregates, such as limestone crusher fines and unprocessed blow sand. The nature of the chemically modified fly ash cements led to an evaluation of fine grained soil stabilization where a wide range of materials, defined by plasticity index, could be stabilized. Parameters used for evaluation included strength, compaction requirements, set time, and frost resistance.
Book Synopsis Utilization of Fly Ash and Coal Mine Refuse as a Road Base Material by : Roger C. Wilmoth
Download or read book Utilization of Fly Ash and Coal Mine Refuse as a Road Base Material written by Roger C. Wilmoth and published by . This book was released on 1979 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Methods for Evaluating Fly Ash for Use in Highway Concrete by : Lawrence L. Sutter
Download or read book Methods for Evaluating Fly Ash for Use in Highway Concrete written by Lawrence L. Sutter and published by Transportation Research Board. This book was released on 2013 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) 749: Methods for Evaluating Fly Ash for Use in Highway Concrete presents suggested changes to coal fly ash specifications and test protocols contained in American Association of State Highway and Transportation Officials (AASHTO) Standard Specifications for Transportation Materials and Methods of Sampling and Testing (AASHTO M 295). The changes suggested include modifications to the test methods currently specified for evaluating acceptability of fly ash for use in highway concrete as well as the introduction of new test methods for enhancing such evaluations. Attachment C: Details of the Research into Methods for Evaluating Fly Ash Use in Highway Concrete is only available online."--Publisher description.
Book Synopsis Use of Fly Ash in Highway Construction by : Jonathan A. Annable
Download or read book Use of Fly Ash in Highway Construction written by Jonathan A. Annable and published by . This book was released on 1986 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fly Ash as a Construction Material for Highways by : James F. Meyers
Download or read book Fly Ash as a Construction Material for Highways written by James F. Meyers and published by . This book was released on 1976 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Introduction to Fly Ash in Concrete Pavement by : J. Paul Guyer, P.E., R.A.
Download or read book An Introduction to Fly Ash in Concrete Pavement written by J. Paul Guyer, P.E., R.A. and published by Guyer Partners. This book was released on 2019-10-12 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introductory technical guidance for civil engineers interested in fly ash in portland cement concrete pavement for streets and highways. Here is what is discussed: 1. FLY ASH AS AN ENGINEERING MATERIAL 2. HIGHWAY APPLICATIONS 3. FLY ASH IN PORTLAND CEMENT CONCRETE.
Book Synopsis Use of Fly Ash for Road Construction with Special Reference to Base and Subbase Courses by :
Download or read book Use of Fly Ash for Road Construction with Special Reference to Base and Subbase Courses written by and published by . This book was released on 1987 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt: Report on the use of fly ash for road construction, concentrating on its useas a base or subbase course material. The study examines present practicesin Ontario, and analyses the effect which chemical additives, such as limeand/or cement, have on the physical characteristics of the aggregate material. Case records on the use of fly ash with additives in road basecourses are examined also.
Book Synopsis Fly Ash-lime Mixtures for Use in Road Construction by : Centre de Recherches Routieres
Download or read book Fly Ash-lime Mixtures for Use in Road Construction written by Centre de Recherches Routieres and published by . This book was released on 1987 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Use of Fly Ash in Highway Construction by : H. D. Clemmons
Download or read book The Use of Fly Ash in Highway Construction written by H. D. Clemmons and published by . This book was released on 1983 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Demonstration Project No. 59 by : David Q. Hunsucker
Download or read book Demonstration Project No. 59 written by David Q. Hunsucker and published by . This book was released on 1989 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fly Ash in Roadway Construction by : J. A. Hester
Download or read book Fly Ash in Roadway Construction written by J. A. Hester and published by . This book was released on 1967 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
