phanikumar (100 Ergebnisse)

54 Seiten Am unteren Buchschnitt mittels Stempel als "Mängelexemplar" gekennzeichnet, jedoch innen wie außen ein sehr gutes Exemplar, fast wie neu. Die Leseseiten sind tadellos, sauber und ohne Anstreichungen. 9783659397004 Sprache: Englisch Gewicht in Gramm: 100 Taschenbuch, Größe: 15 x 0.4 x 22 cm.

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Taschenbuch. Zustand: Neu. Neuware -This research explores the efficacy of use of random oriented geofiber reinforcement in controlling swell shrink behaviour of expansive soil. The effect of fiber content (fc), which was varied as 0.25% and 0.50% on rate of heave, swell potential and swelling pressure was studied in the case of oedometer samples(diameter = 60mm, height = 20mm). Moreover, the effect of the aspect ratio (length to width ratio of geofiber) which was varied as 3, 6 and 10 on swelling behaviour was also investigated. Influence of sample thickness on heave was investigated using cylindrical samples compacted in Proctor¿s mould (diameter =100mm) in both unreinforced and fiber-reinforced conditions. Further, these samples compacted in Proctor¿s mould were subjected to alternate wetting and drying cycles to simulate field condition. Useful data were obtained.Books on Demand GmbH, Überseering 33, 22297 Hamburg 64 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -This monograph presents is a parametric study on the collapse behaviour of a lateritic silt. Collapsible soils are problematic by nature. They undergo collapse or a sudden settlement or subsidence under a given stress when their water content is increased. Collapse can also occur at a constant water content when the applied stress is increased. Collapse takes place in these soils mainly because their structure becomes unstable and collapses. Collapsible soils are basically silty soils and obtain their name as ¿collapsible soils¿ because they undergo collapse or sudden settlement or subsidence under a constant stress when water content is increased, or at a constant water content when the applied stress is increased. Collapse compression is highly detrimental to civil engineering structures as they can be subjected to huge amounts of unexpected and sudden settlement.Books on Demand GmbH, Überseering 33, 22297 Hamburg 56 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Swelling characteristics of expansive soils, namely, swell potential and swelling pressure depend on various parameters such as initial water content, dry unit weight and surcharge pressure. It is important to correctly understand the effect of these parameters on swelling characteristics. This paper discusses the effect of surcharge pressure on swelling characteristics of expansive soils. Swell potential, swelling pressure and rebound were studied of samples subjected to varying initial surcharge pressures. The paper focuses on the need to consider the effect of initial compression on swell potential and swelling pressure. It was found that the actual values of swell potential and swelling pressure obtained when initial compression was considered were higher than the values of swell potential and swelling pressure when initial compression was ignored.Books on Demand GmbH, Überseering 33, 22297 Hamburg 52 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volume changes corresponding to changes in moisture regime. They swell and shrink respectively when water is absorbed in rainy seasons and when water evaporates in summers. As a result, lightly loaded civil engineering infrastructure founded in these soils are severely damaged. Many innovative foundation practices have been suggested for mitigating the problems posed by expansive soils. Some of these techniques are physical and chemical alteration and special foundation techniques in the form of tension-resistant foundations. This monograph presents experimental work on the effective use of lime and fly ash in reducing swelling and shrinkage of expansive soils. The tests conducted to find out swell potential and swelling pressure and other important engineering properties of the expansive clay samples blended with lime and fly ash have yielded useful results.Books on Demand GmbH, Überseering 33, 22297 Hamburg 80 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volume changes corresponding to changes in moisture regime. They swell and shrink respectively when water is absorbed in rainy seasons and when water evaporates in summers. As a result, lightly loaded civil engineering infrastructure founded in these soils are severely damaged. Many innovative foundation practices have been suggested for mitigating the problems posed by expansive soils. Some of these techniques are physical and chemical alteration and special foundation techniques in the form of tension-resistant foundations. This monograph presents the efficacy of pond ash treatment of expansive soils in reducing swelling and shrinkage. Further, 4% lime was added to pond ash-clay blends to study the reduction in swell potential and swelling pressure and other important engineering properties of the expansive soil samples.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -This book presents experimental data on fly ash obtained from a thermal power station. Lime was used as a blend material to study its effect on various engineering properties of fly ash. Proctor compaction tests, unconfined compression tests and Proctor needle penetration tests were performed on lime-fly ash blends. Effect of curing on unconfined compressive strength was also studied. Addition of lime to fly ash decreased the maximum dry density and increased the optimum moisture content. 4% lime was found to be the optimum content with regard to unconfined compressive strength for all curing periods. Penetration resistance also reached its maximum value at 4 % lime and thereafter decreased with increasing lime content.Books on Demand GmbH, Überseering 33, 22297 Hamburg 52 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -This book is an experimental work on clay-fly ash blends. Laboratory tests were performed on fly ash- clay blends to study the influence of amount of fly ash on compaction characteristics of the blends, varying the amount of fly ash. Further, the effect of increasing compaction energy on compaction characteristics of unblended clay was also studied varying the number of blows per layer. As fly ash is known to be a stabilizing agent, an attempt is made to draw a correlation between the amount of fly ash and the compaction energy with reference to maximum dry unit weight and optimum moisture content. The idea is to show that adding a certain amount of fly ash is akin to imparting higher compaction energy to the unblended clay. Proctor needle penetration tests were performed on the blends containing varied amounts of fly ash and also on samples compacted to varied compaction energies.Books on Demand GmbH, Überseering 33, 22297 Hamburg 52 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volume changes corresponding to changes in moisture regime. They swell and shrink respectively when water is absorbed in rainy seasons and when water evaporates in summers. As a result, lightly loaded civil engineering infrastructure founded in these soils are severely damaged. Many innovative foundation practices have been suggested for mitigating the problems posed by expansive soils. Some of these techniques are physical and chemical alteration and special foundation techniques in the form of tension-resistant foundations. This monograph presents the efficacy of fiber-reinforcement of expansive soils in reducing swelling and shrinkage. The tests conducted to find out swell potential and swelling pressure and other important engineering properties of the expansive soil samples reinforced with fiber have yielded useful results.Books on Demand GmbH, Überseering 33, 22297 Hamburg 60 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volume changes consequent upon changes in water content. They swell when they absorb water and shrink when they lose water to the atmosphere. As a result, civil engineering infrastructure founded in these soils get severely distressed. Hence, many innovative foundation techniques have been suggested in order to reduce the volumetric changes of these soils. This monograph is an experimental investigation on a remoulded expansive soil blended with varied amounts of calcium carbide residue (CCR) and fly ash. Compaction characteristics and unconfined compressive strength were studied. Useful results were obtained.Books on Demand GmbH, Überseering 33, 22297 Hamburg 64 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volume changes such as swelling and shrinkage respectively corresponding to water absorption and water evaporation. This alternate swelling and shrinkage causes distress in the structural members of lightly loaded civil engineering infrastructure such as buildings, pavements and canal linings. Chemical stabilisation is one of the viable techniques to control these volume changes of expansive soils. This book deals with lime stabilisation and pond ash stabilisation of a remoulded expansive clay. Laboratory tests were performed on the clay blended with varied amounts of lime and pond ash in different series of tests. Swelling and compressibility characteristics were evaluated.Books on Demand GmbH, Überseering 33, 22297 Hamburg 84 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volume changes such as swelling and shrinkage respectively corresponding to water absorption and water evaporation. This alternate swelling and shrinkage causes distress in the structural members of lightly loaded civil engineering infrastructure such as buildings, pavements and canal linings. Chemical stabilisation is one of the viable techniques to control these volume changes of expansive soils. This book deals with lime stabilisation of a remoulded expansive clay. Laboratory test were performed on the clay blended with varied amounts of lime. Swelling and compressibility characteristics were evaluated.Books on Demand GmbH, Überseering 33, 22297 Hamburg 76 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volumetric changes corresponding to changes in moisture content. These soils can be identified by their index properties sch as free swell index and liquid limit and plasticity index. This book is an experimental work on the effect of pozzolanic additives such as lime, cement, fly ash and pond ash on the index properties of expansive soils. Significant index properties such as liquid limit, plastic limit, plasticity index and free swell index were studied at varied amounts of lime, calcium chloride, cement, fly ash, pond ash and GGBS.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Compacted expansive clays which are high in montmorillonite content also have a very low hydraulic conductivity. When expansive clays are blended with fly ash, an industrial waste, the hydraulic conductivity further reduces as the ash-clay blends result in increased dry densities at increased fly ash contents. Hence, fly ash- stabilised expansive clay can also be proposed as an innovative clay liner material. It is, therefore, required to study various physical and engineering properties of this new clay liner material. Liquid limit (LL) and free swell index (FSI) are important index properties to be studied in the case of this clay liner material. Laboratory experimental studies were performed on expansive clay-fly ash blends, which would be suggested as a new clay liner material. This monograph discusses LL and FSI determined using deionised water and CaCl2, NaCl, and KClsolutions of varying concentration at 0%, 10%, 20% and 30% fly ash content in the blend. Further, this monograph presents extensive experimental data on hydraulic conductivity (k) of an innovative clay liner material to be proposed in the form of fly ash-stabilised expansive clay.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils, popularly known as black cotton soils in India, are highly problematic, as they swell on absorbing water and shrink on evaporation thereof. Because of this alternate swelling and shrinkage, civil engineering structures founded in them are severely damaged. For reducing heave of foundations in expansive soil different techniques such as sand cushion, the cohesive non-swelling (CNS) layer, belled piers, under-reamed piles and granular pile-anchors were suggested. Stabilization of expansive clays with various additives has also been successfully practised. In this work effect of fly ash on free swell index (FSI), swell potential, swelling pressure, coefficient of consolidation, compression index, secondary consolidation characteristics and shear strength has been studied. The contents of fly ash have been varied as 0, 10% and 20%. The blend of expansive clay with 20% fly ash showed significant reduction in swell potential, swelling pressure, compression index and secondary consolidation characteristics. A fly ash content of 20% also resulted in maximum increase in maximum dry density and shear strength.Books on Demand GmbH, Überseering 33, 22297 Hamburg 76 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are problematic in nature by virtue of their innate capacity to undergo volume changes when there are changes in moisture regime. These soils swell when they absorb water and shrink when water evaporates from them. So, lightly loaded civil engineering structures founded in these soils are subjected to alternate swelling and shrinkage in rainy and summer seasons. As a result, they experience unsightly cracking. The structural members that get affected are flooring, walls, columns, grade beams, etc. The types of damage are disruption or disintegration of flooring, tensile cracks above doors and above and below window sills and cracks in grade beams and columns. Often, the cost of repair of the structure may exceed the cost of the original structure. Many innovative foundation practices have been devised to counteract the problems posed by expansive soils. These can be grouped into various classes such as mechanical alterations, physical alterations, chemical alterations and special foundation techniques. This book discusses in detail the problems posed by expansive soils, the identification methods and the remedies in the form of innovative foundations.Books on Demand GmbH, Überseering 33, 22297 Hamburg 64 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic because of their innate capacity to undergo volume expansion upon absorbing water. This monograph is an experimental work on chemical stabilization of expansive soils. Fine sand, lime and fly ash were the additives used in the experimentation. A highly swelling remoulded expansive clay powder passing 425 µm sieve was used in the experimentation. Free swell index (FSI), heave, swell potential (S%) and swelling pressure (ps) of the clay blended with the above reagents were determined. The test results indicated that FSI decreased with increase in lime content, fly ash content and fine sand content. FSI of lime-clay blends indicated that 4% lime was the optimum lime content. Hence, in another test series, 4% lime was added to sand-clay blends and fly-ash clay blends, and their FSI was determined. FSI further decreased with addition of 4% lime. On all the above blends, 1-D swell-consolidation tests were performed for the determination of heave, swell potential, swelling pressure, coefficient of compressibility, compression index, rebound and linear shrinkage. All these parameters were found to have decreased with increase in additive contents.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive soils are highly problematic by virtue of their innate capacity to undergo volumetric changes such as swelling ans shrinkage based on changes in water content. As a result, lightly loaded civil engineering infrastructure founded in these soils get severely distressed. Chemical stabilisation is one the many innovative foundation practices suggested for reducing the above-mentioned volumetric changes. This book is on stabilisation of a remoulded expansive soil with pond ash. Swelling and compressibility characteristics were studied at varied amounts of pond ash.Books on Demand GmbH, Überseering 33, 22297 Hamburg 72 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -This book presents experimental data on LL, PL, PI, compaction characteristics, stress-strain characteristics and unconfined compressive strength (UCS) of a lateritic soilstabilized with varying amounts of cement and GGBS. Cement and GGBS were independently added to the lateritic soil up to 20% in increments of 5%. LL and PI respectively decreased by 23.5% and 49.5% when cement content increased from 0% to 20%. In a similar manner, when GGBS content increased from 0% to 20%, LL and PI respectively decreased by 16% and 30%. Further, MDD increased respectively by 11% and 5% when cement content and GGBS content increased from 0% to 20%. The unconfined compressive strength (UCS) of the cement-soil blends and the GGBS-soil blends increased with increasing additive content. Moreover, for a given additive content, UCS increased significantly with increasing curing period.Chemical stabilization of soils is an effective method of improving their engineering behavior. Through chemical stabilization, the shear strength improves, bearing capacity increases and settlements decrease.Books on Demand GmbH, Überseering 33, 22297 Hamburg 52 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Expansive clay absorb water and swell, and lose water to atmosphere and shrink. Because of this alternate swelling and shrinkage, lightly loaded civil engineering structures are distressed. This has resulted in a huge financial loss. Hence, it is and important to devise innovative foundation techniques in order to counteract the volumetric changes occurring in expansive soils. The various foundation techniques which have been in vogue are physical and chemical alteration methods and tension resistant foundations. Tension-resistant foundation techniques are innovative techniques in which tensile forces generated through the process of swelling are counteracted through introduction of deep or anchor foundations. This book is a work on a parametric study of tension-resistant foundations.Books on Demand GmbH, Überseering 33, 22297 Hamburg 56 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -Compacted expansive clays are high in montmorillonite content. They have a low hydraulic conductivity. When expansive clays are blended with fly ash, an industrial waste, the hydraulic conductivity further reduces as the ash-clay blends result in increased dry densities at increased fly ash contents. Hence, fly ash- stabilised expansive clay can also be proposed as an innovative clay liner material. It is, therefore, required to study various physical and engineering properties of this new clay liner material. Liquid limit (LL) and free swell index (FSI) are important index properties to be studied in the case of this clay liner material. Laboratory experimental studies were performed on expansive clay-fly ash blends, which would be suggested as a new clay liner material. This monograph discusses LL and FSI determined using deionised water and CaCl2, NaCl, and KClsolutions of varying concentration at 0%, 10%, 20% and 30% fly ash content in the blend. Further, experimental data on hydraulic conductivity (k) of the proposed clay liner material are also presented.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.

Taschenbuch. Zustand: Neu. Neuware -The study of earthen barriers or clay liners has become very important in the field of geo-environmental engineering. The design of clay liners is based on the fact that leachate migration through clay liners depends on their hydraulic conductivity (k). Hence, a low hydraulic conductivity (k) is an important parameter in the design of clay liners. Compacted expansive clays or montmorillonite clays have a very low hydraulic conductivity. When expansive clays or montmorillonite clays are blended with fly ash (which is stabilization of the clay with fly ash), an industrial waste, the hydraulic conductivity further reduces as the fly ash-clay blends result in increased dry densities at increased fly ash contents. Hence, fly ash-stabilised expansive clay can also be proposed as an innovative clay liner material. This book presents a comprehensive review on clay liners.Books on Demand GmbH, Überseering 33, 22297 Hamburg 68 pp. Englisch.