Download or read book Lime fly Ash Ratio and Admixture Content Versus Strength of Stabilized Sandy and Silty Soils written by Charles E. Sell and published by . This book was released on 1957 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lime fly Ash Ratio and Admixture Content Versus Strength of Stabilized Clayey Soil written by Robert Lee Crosby and published by . This book was released on 1957 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lime Stabilization written by and published by Transportation Research Board National Research. This book was released on 1987 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: For many years, various forms of lime, including products with varying degrees of purity, have been utilized successfully as soil stablizing agents. The state of the art in lime treatment based on a comprehensive analysis of current practice and technical literature is presented in this report. References are included for more information.
Download or read book Lime Stabilization Mix Design Properties and Process 1962 written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1962 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper 1 reports on the fatigue behavior of a lime-fly ash-aggregate mixture. Specimens, 6- by 6- by 38-in., were tested after a 28-day curing period by subjecting them to constant, repeated flexural loads. Paper 2 considers the selection of 20 representative Iowa soils and the results of laboratory tests to determine the effects of a dolomitic monohydrate lime on the plastic limit and unconfined compressive strength of these soils. Paper 3: Subgrade soils on three projects in Virginia were stabilized with hydrated lime. They were sampled during 1960 for the purpose of studying the effects of addition of hydrated lime. Paper 4: The main objects of the investigations were to find a possible best ratio of lime to fly ash and the optimum amount of the lime and fly ash admixture for stabilizing various textured soils, to determine the effects of lime content and curing period on the strength of soil and lime mixtures, and to compare the strengths of soils treated with lime, lime and fly ash, or cement.
Download or read book Lime and Lime flyash Soil Stabilization written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1958 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preconditioning and Stabilizing Soil by Lime Admixtures written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1960 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lime fly ash Soil Stabilization written by Ignacio Romero and published by . This book was released on 1954 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Stabilization of Silty Soil Using Fly Ash written by Rafal Gaciarz and published by . This book was released on 2012 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil Stabilization occupies an important role in all Civil Engineering works. Now with the scarcity of good building sites, engineers are forced to use the available sites, modify their geotechnical properties and build facilities. In these direction different methods of soil stabilization offers them inexpensive but efficient solutions. Soil stabilization is the process of increasing strength and bearing capacity of soils either by mechanical or chemical methods. Stabilization also eliminates or decreases settlements, hydraulic conductivity and swell and shrinkage potential. The mechanical method of stabilization involves the change of gradation of the soil and densifying the soil by mechanical methods such as rollers. Chemical stabilization involves altering the properties by adding cement, lime or any other cementations material. In this study an attempt has made to investigate the efficacy of class C Fly Ash to stabilize silty soils. Varying proportions of fly ash was added and determined the basic geotechnical properties such as, specific gravity, plasticity, compaction characteristics, unconfined compression strength and stress-strain modulus. It has been observed that the addition of fly ash did not alter significantly the plasticity characteristics of the soil. Standard Proctor and Harvard Miniature Compaction Tests revealed that maximum dry density increases with increasing fly ash content and optimum moisture contents decreased with increasing in ash contents. Unconfined compression tests were conducted on compacted specimens corresponding water contents of optimum moisture contents (OMC), OMC-2%, and OMC+2%. It has been observed that the unconfined compressive strength (qu) and consequently the undrained shear strength (SuƠ) which is half the unconfined compressive strength increased moderately with increasing fly ash content for all the 3 moisture content conditions. However, the stress-strain modulus decreased with increasing ash content. The modulus and the unconfined compressive strengths of soil-fly ash mixtures can be expressed by an approximate formula: E=15 to 100qu Where, E = Stress-Strain modulus (either Tangent or Secant Modulus) qu = Unconfined compressive strength. From the analysis of the results of this study, it appears that fly ash is not an effective stabilizer to stabilize silty soils. This may be due to the fact that both silt particles and fly-ash particles have approximately same size. This might result in poor gradation that is deficient in particle interlocking in silt-fly ash mixtures. Another important property required for effective stabilization is plasticity. Unlike lime, fly ash is a low or non-plastic material and is not effective in binding the soil particles together.
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.
Download or read book Bulletin written by and published by . This book was released on 1961 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fly Ash for Soil Improvement written by Kevan D. Sharp and published by . This book was released on 1993 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fly Ash for Soil Improvement provides civil and geotechnical engineers with a contemporary review of the beneficial uses of fly ash for both general construction purposes and for waste containment/soil stabilization. Peer-reviewed papers describe the use of self-cementing fly ashes as a soil stabilization agent; fly ash stabilization of tropical Hawaiian soils, south Texas soils, and industrial wastes; enzyme-enhanced stabilization; lime sludge amended fly ash; calcareous expansive clays; and engineering properties of a clay modified by fly ash and slag."--BOOK JACKET.Title Summary field provided by Blackwell North America, Inc. All Rights Reserved
Download or read book Bulletin written by Iowa. Highway Research Board and published by . This book was released on 1953 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Use of Fly Ash in Soil cement written by Chester W. Jones and published by . This book was released on 1986 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by Iowa Engineering Experiment Station and published by . This book was released on 1960 with total page 938 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Engineering Report written by Iowa State University. Engineering Research Institute and published by . This book was released on 1963 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bulletin written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1962 with total page 926 pages. Available in PDF, EPUB and Kindle. Book excerpt: Papers presented at the Highway Research Board's annual meeting.
Download or read book The Deep Mixing Method written by Masaki Kitazume and published by CRC Press. This book was released on 2013-02-21 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Deep Mixing Method (DMM), a deep in-situ soil stabilization technique using cement and/or lime as a stabilizing agent, was developed in Japan and in the Nordic countries independently in the 1970s. Numerous research efforts have been made in these areas investigating properties of treated soil, behavior of DMM improved ground under static and d
