Download or read book Lime modified Soil to Increase Subgrade Stability written by Robert J. Little and published by . This book was released on 1983 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handbook for Stabilization of Pavement Subgrades and Base Courses with Lime written by Dallas N. Little and published by . This book was released on 1995 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lime modified Soil to Increase Subgrade Stability written by Robert J. Little and published by . This book was released on 1983 with total page 110 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 The Influence of Temperature on North Carolina Lime stabilized Soil Subgrades written by Immanuel Kyle Baucom and published by . This book was released on 2008 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lime stabilization is one of the most practical and cost effective techniques of subgrade stabilization in pavement design. However, an undesirable characteristic is the presumed inability of lime-stabilized soils to achieve necessary strengths at colder temperatures, possibly resulting in premature pavement failures. The goal of this research was to more clearly define this relationship between soil-lime reactions and temperature through pH, conductivity, and unconfined compression testing. Significant conclusions from this research include that the minimum lime content of a soil increases as temperature decreases. Increased curing duration leads decreases in pore fluid pH. However, this reduction in pH is less at lower temperatures, indicating that little reactivity occurs below 50[degrees]F. Short-term curing durations show no significant gain in unconfined compression strength, while long-term curing durations lead to significant strength gains, which suggests that pozzolanic reaction does not begin to take place until after 7 days of curing. Long-term curing durations also show the trend of increasing unconfined compressive strength with increasing temperature. However, lower temperatures resulted in less strength gain. For example, 7-day sample strengths at 35[degrees]F increased by only 10% with a 56-day cure, while those samples cured at 70[degrees]F nearly doubled when curing duration was increased from 7 to 56 days. Exposure to freeze-thaw cycles or initial curing at 35[degrees]F resulted in significant reductions in strength gain for a given curing duration. However, once the freeze-thaw cycles or temperature reduction was removed, strength gain resumed at approximately the same rate. Overall, these results suggest that current specifications may be modified to allow lime stabilization to proceed in cooler temperatures, provided a corresponding increase in curing time and/or thermal protection is provided prior to loading.
Download or read book Summary Reviews of Soil Stabilization Processes written by Waterways Experiment Station (U.S.) and published by . This book was released on 1957 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beneficial Utilization of Lime Sludge for Subgrade Stabilization written by Xiong Yu and published by . This book was released on 2009 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water plants annually produce thousands of tons of lime sludge from the water treatment procedures. The lime sludge is then discharged into a retention pond. When the storage limit is reached, lime sludge is usually disposed into landfills, where they are treated as solid wastes. The large amount of lime sludge available (the quantity of lime sludge is estimated to be millions of tons for Ohio alone), the inexpensive (essentially free) material is very attractive if it can be used for soil stabilization in transportation constructions. In order to use efficiently lime sludge as subgrade stabilization, proper design procedures for lime sludge introduction need to be followed to achieve the optimal performance. Besides, the long term performance of lime sludge modified soils needs to be verified. The purpose of this study was to determine the feasibility of using lime sludge as subgrade stabilization. The study focused on the feasibility of using lime sludge as a substitute of regular lime used in road construction, design issues such as, method of lime sludge introduction, the optimum content of lime sludge and the long term performance etc. Experimental study was conducted on five typical types of subgrade soils in Ohio as well as a high plastic clay soil in Cleveland area. Common procedures for determining the optimal lime content for soil stabilization based on pH values are found not applicable for lime sludge. Instead, performance criteria based on unconfined compression tests need to be utilized. Lime sludge was found to increase the soil deformation modulus and reduce the plastic behaviors. Wet mix and dry mix methods do not appear to significantly affect the strength of lime sludge modified soil. Considering of the economic factors associated with drying lime sludge, lime sludge can be introduced in the slurry format via the wet mix procedure. The existing testing data indicated that lime sludge does not significantly improve the unconfined soil strength. Lime sludge however demonstrated the positive effects in reducing the plasticity of soils and improve the freeze/thaw durability. The long term performance evaluation could provide data to quantify the effectiveness of lime sludge as an economic and sustainable material.
Download or read book Laboratory Evaluation of Poor Subgrade Modified Using Lime written by Pamela Najjar and published by . This book was released on 2019 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subgrade of a pavement system deteriorates and sub sequentially reaches its failure due to an excess amount in water moisture, load fatigue, aging, and temperature variations affecting the material used in the system. Road success lies in the strengthening of its foundation, also known as the subgrade material, by the addition of chemical additives. The effectiveness of using mixtures of lime in poor soil stabilization was investigated by mean of laboratory testing to evaluate the California Bearing Ratio (CBR) value. In this study, two weak soil types were extracted from two construction sites in Tripoli, Lebanon in order to evaluate the modifications of the physical properties of these subgrade materials with the aim of strengthening by means of laboratory modification using local materials. A chemical reaction between the lime and clayey fraction is supposed to take place leading to higher strength and lower plasticity. The laboratory testing done in this study was to determine the physical properties of poor subgrade material stabilized with lime. These tests include Particle Size Distribution, Specific Gravity, Atterberg Limit, Moisture Content, Compaction Characteristic and Natural Moisture Content. For Soil Type 1 the best results were from an addition of 6% lime while as for Soil Type 2, 5% and 6% of lime yielded the best results. The results of this study show an improvement in the mechanical properties of the soil type 1 and soil type 2 but not enough to be used as approved sub-grade material in Lebanon. As a result, lime stabilization technique can be used to enhance poor subgrades. Furthermore, this can be an approach for solving disposal problems and moving towards a green environment.
Download or read book Lime Stabilisation written by C. D. F. Rogers and published by Thomas Telford. This book was released on 1996 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been compiled to meet the increased need for knowledge on alternative ground improvement techniques using lime. It brings together expertise and experience from industry and academia to provide and overview of lime stabilisation.
Download or read book Post Construction Evaluation of Lime Treated Soils written by Chulmin Jung and published by Purdue University Press. This book was released on 2007-11-01 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lime is used to treat weak subgrade soils during construction of highways. A small amount of lime (4 to 7%) is used to rapidly dehydrate and modify fine grained soils. The modification process improves workability and compactability of the soils. Although the lime modification process is primarily aimed at construction expediency, additional effects such as long-term improvement of stiffness and/or strength by pozzolanic and carbonation cementation reactions are expected. Lime treatment has been employed in Indiana over several decades, but the long-term performance of lime-treated soils has not been well quantified and no field tests have been done on roads in service. A comprehensive field investigation was carried out to determine the properties of subgrade soils treated with lime in pavements that had been in service for at least five years. Six sites were selected for the field tests. At each site, SPT, DCPT, and FWD tests were performed to evaluate the in-situ stiffness and/or strength properties of the lime-treated subgrade. Laboratory tests from soil samples taken from the SPT spoon were done to obtain index properties of the lime-treated subgrade and the lime content that remains in the soil. The long-term performance of the lime-treated subgrade at each site has been evaluated by comparing the soil indices and stiffness and/or strength properties of the lime-treated subgrade soil with those of the natural soil. In addition, the lime content of the subgrade and the natural soil were measured to establish the remaining lime in the treated subgrade and detect any leaching in the underlying soil. The research has shown the following: (1) the lime remains in the soil even after 11 years of service of the road after construction; (2) the addition of lime decreases the plasticity of the soil and increases its CBR; and (3) the construction quality observed from the field tests is highly variable. 17.
Download or read book Soil Stabilization with Cement and Lime written by Philip Thomas Sherwood and published by Stationery Office Books (TSO). This book was released on 1993 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soil stabilization is the process whereby soils and related materials are made stronger and more durable by mixing with a stabilizing agent. These techniques are used for road construction in most parts of the world, although the circumstances and reasons for resorting to stabilization vary considerably.
Download or read book Mixture Design for Lime treated Soils written by Marshall R. Thompson and published by . This book was released on 1969 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mixture design for lime-soil treatment has two major objectives: to establish an appropriate lime content for construction, and to evaluate the properties of the mixture.
Download or read book Stabilization of Local Expansive Subgrade Soil using Marble waste powder with Lime written by Amdegebreal Endalew and published by GRIN Verlag. This book was released on 2020-03-19 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thesis (M.A.) from the year 2016 in the subject Engineering - Civil Engineering, grade: Very Good, , course: Master's Thesis Work, language: English, abstract: Expansive soils are the most problematic soils due to their property of swelling and expansion with the influence of variable moisture, a number of civil engineering structures were destroyed. A billions of US dollars spent worldwide each year to mitigate the problem. The presence of expansive sub-grade soil results pavement distress and damage. Removing the expansive soil and replacing with the competent material is applied to mitigate the problem which is very expensive and time consuming for long hauling distance and thick layer expansive soil. This study presented stabilization of local expansive sub-grade soil using marble waste powder with lime. The marble waste powder was collected in Addis Ababa from Ethiomarble processing enterprise Gulele branch and the lime was collected at Gast Solar Mechanics in Addis Ababa. Free swell index test, Atterberg limit test, Proctor test, unconfined compressive test, California Bearing Ratio Tests, swelling potential and swelling pressure test were used to evaluate properties of treated and untreated soils. The expansive subgrade soil was treated using 5%, 10%, 15%, 20%, and 25% marble waste powder with fixed 3% lime respective combinations by weight of the soil. The optimum percent combination for this study was 10% marble waste powder with 3%lime based on soaked CBR swell, soaked CBR, swelling pressure and swelling potential test result values. Optimum proportion of stabilizers improve CBR Value from 0.65% to 4.19%, reduce swelling pressure from 1000kpa to 440kpa, increases MDD from 1.21 to 1.29, and reduce PI from 78% to 48.4%. Keywords: marble waste powder, lime, expansive soil, CBR, UCS, swelling pressure, MDD, OMC
Download or read book Lime treated soil construction manual written by and published by . This book was released on 2004 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lime Stabilization of Roads written by National Lime Association and published by . This book was released on 1954 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Subgrade Stability written by and published by . This book was released on 1977 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Soil Stabilization written by U.S. Army Engineer Waterways Experiment Station and published by . This book was released on 1962 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
