Impact Of Curing Temperature On The Strength Of Lime Preserve Fly Ash

Fly Ash in India is about 112 million tones with 65000 acre of land being occupied.In recent times the usage of fly ash as one of the dominant construction material. To enhance and improve the properties of fly-ash by stabilizing with lime. In this work aimedto evaluation of the impact of lime as stabilizing material to the fly ash. The geo-engineering properties of fly ash alongfly ash with different proportion of lime were conducted. Following tests light and heavy compaction test, unconfined compressive strength test, permeability test and CBR tests were studied for fly-ash sample. The stabilized fly-ash was done by adding lime with varying (2%, 4%, 8% & 10%) percentages. The UCS samples were cured for 7, 14, and 28 Days with different temperatures of 10o, 27o, and 50o. The potential and efficiency of adding disposed fly ash from Mae Moh Electric Power Plant, Thailand, into cement-admixed clay were studied by means of a series of UC and physical tests (Jongpradist et al. 2010). An experimental study was conducted to investigate the long-term performance of fly ash stabilized two fine-grained soil sub-bases (Shafique et al. 2009). A number of researches on study of using fly ash in the field of geotechnical engineering has been reported, such as the preserve of soil in compaction works of highway embankment or slope without cement or lime (Edil et al.2006; Kim et al. 2005; Prabakar et al. 2004) with cement (Kaniraj and Havanagi 1999) and with cement and fiber reinforcement (Kaniraj and Havanagi 2001). Numerous studies on application of fly ash as bulk fill material are also available (Raymond 1958; DiGioia and Nuzzo 1972; Gray and Lin 1972; Joshi et al. 1975) which demonstrated the possibility of utilizing huge amount of fly ash in the construction of embankments, dykes, and road subgrades. A wide range of soils can be stabilized using fly ash (Chu et al. 1955; Geocker et al. 1956; Viskochil et al. 1957; Ghosh et al. 1973; Vasquez and Alonso 1981; Lo and Wardani 2002). Other uses of fly ash are land reclamation (Kim and Chun 1994), and injection grouting (Joshi et al. 1981). Ghosh et al. (2005) demonstrated the use of fly ash as foundation medium reinforced with jute-geotextiles. Undrained shear strength parameters of fly ash were reported by Raymond (1961)

Stabilization of Lime Treated Black Cotton Soil with Bamboo Fibre

Construction of pavement subgrades for roads and railways on black cotton soil (BC soil) is highly risky on geo-technical grounds because such soil is susceptible to differential settlements, poor shear strength and high compressibility. Chemical stabilization is one of the oldest methods of stabilization of problematic soil. In recent days, it has been investigated that addition of fibers will improve the ductility behavior of the soil there by reducing the development of crack during shrinkage. This project describes the compaction and strength behavior of Lime treated black cotton soil (BC soil) reinforced with bamboo fibers. The various percentage of lime as 2%, 4%, 6% and 8% was used to find out the optimum value of lime. Bamboo fiber has been randomly included into the lime treated soil at four different percentages of fiber content, i.e. 0.5%, 1% 1.5%, and 2% (by weight of soil). The tests which were carried out are Atterberg’s Limits, Modified compaction test, California bearing ratio test and unconfined compression test. The test result indicates that strength properties of optimum combination of BC soil-lime specimens reinforced with bamboo fibers is appreciably better than untreated BC soil. And also the strength of the mixed soil increases with increase in days. And Cyclic Plate Load tests were carried out for the optimum percentage obtained from the above test results and the results were analyzed for the suitability of subgrade under certain loads in a model test tanks under laboratory conditions

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Not AvailableThe prime objective of the study is to understand the forest diversity in the degraded forests of Burna, Baliagam reserve forests of Srikakulam and Mallavaram Reserve Forest of East Godavari districts of Andhra Pradesh, India. In Burna 16, Baliagam (11) and Pothavaram (16), Mallavaram (17) number of different species were found. Terminalia tomentosa species found in all the areas except in Baliagam and was uniformly distributed over the entire area. Bridella retusa, Casearia elliptica, Wrightia tinctoria, Pterocarpus morsupium, Chloroxylon swietenia, Diospyros sylvatica, Dalbergia paniculata, etc are the important species found in the sample plots. Shannon's and Menhinick’s index values are more in Burna RF (3.896) (2.238) and Simpson's index value is more in Baliagam RF (0.226). Above all height and girth of all the species also recorded. Our study of TP-1 areas helped to identify present tree status and also to find the rare species in the miscellaneous forests. Based on this, measures can be taken up to protect the forest areas.Not Availabl