نتایج جستجو برای: akadama olcanic ash soil

تعداد نتایج: 202307  

2014
Kyung-Joong Lee Seong-Kyum Kim Kwan-Ho Lee

The purpose of this study was to investigate the relationship between strength and strain in manufacturing controlled low strength materials to recycle incineration bottom ash. Laboratory tests for controlled low strength materials with bottom ash and recycled in-situ soil have been carried out. The optimum mixing ratios were 25%-45% of in-situ soil, 30% of bottom ash, 10%-20% of fly ash, 0%-3%...

2012
Rajesh Pandey Ved Prakash Singh Sunil K. Pandey

The study of undertaken for heavy metal Pb accumulation by fly ash and coal waste in Singrauli industrialised district of India, using atomic absorption spectrometry. Ashes from collected vegetables and plants leaves samples were analysed for the quality and quantity of Cr, Mn, Pb, Zn, Cu, As, Ni and Co and detectable levels of all were found. Pb distrusted the metabolic processes of living org...

2008
Sonja Paul Heiner Flessa Magdalena López-Ulloa

Quantitative knowledge of stabilizationand decomposition processes is necessary to understand, assess and predict effects of land use changes on storage and stability of soil organic carbon (soil C) in the tropics. Although it is well documented that different soil types have different soil C stocks, it is presently unknown how different soil types affect the stability of recently formed soil C...

2015

---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Over the past few decades Road infrastructure in India is developing at a quick pace. A decent pavement is required for the safe, comfortable and prudent development of traffic. The thickness of road relies on geotechnical properties of subgrade so...

Journal: :international journal of civil engineering 0
b.a. mir room no 203, deptt of civil engg., nit hazratbal, srinagar-190006, kashmir, j&k (india)

fly ash is one of the most plentiful and versatile of the industrial by-products. at present, nearly 150 million tonnes of fly ash is being generated annually in india posing dual problem of environmental pollution and difficulty in disposal. this calls for establishing strategies to use the same effectively and efficiently. however, it is only in geotechnical engineering applications such as t...

2009
Alejandro A. Royo Kathleen S. Knight

To assess white ash (Fraxinus americana) health status in the Allegheny Plateau region via 1) examination and refinement of existing FHM/FIA plot data and 2) establishment and sampling of additional ash health plots to enhance existing FHM/FIA data. This enhanced sampling will allow us to explore, in detail, how topographic position and site characteristics (e.g., soil pH and nutrition) are rel...

2006
Malle Mandre

Short-term effects of different doses (0.25 and 0.5 kg m) of wood ash fertilization in a field experiment in a 20-year-old Scots pine stand on a nutrient-poor sandy soil (Arenosol) was studied in North Estonia. Soil chemical properties, nutrient accumulation, soluble carbohydrates, starch, hemicellulose, cellulose, and lignin were used as biochemical indicators for the assessment of the state o...

2013
Xin Kang

The sedimentation behavior of fine grained soil is largely dependent on its pore fluid chemistry. Physicochemical properties of the pore fluid, such as ionic strength and pH, could greatly influence the micro structure of kaolinite which in turn influences the sedimentation behavior. Other than ionic effect, adding fly ash can also cause different sedimentation behaviors due to the change of gr...

Journal: :تحقیقات مهندسی کشاورزی 0
کامیار نوروزیان دانش آموخته کارشناسی ارشد سازه های آبی دانشگاه صنعتی اصفهان نادر عباسی دانشیار بخش تحقیقات آبیاری و زهکشی مؤسسه تحقیقات فنی و مهندسی کشاورزی جهانگیر عابدی کوپایی استاد گروه مهندسی آب دانشگاه صنعتی اصفهان

different additives have been considered to improve stabilization of the engineering properties of fine-grained soil. the present study investigated the effect of the addition of sewage sludge ash on the compressive strength of clay soil at optimum moisture content and under saturated conditions. the four treatments tested were the addition of 0%, 5%, 10% and 15% sewage sludge ash to clayey soi...

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