Lime and fly ash were added to the expansive soil at 4%6% and 40%50% by dry weight of soil, respectively. The amount of cement added to the soil is less than that required to produce a hardened mass but is enough to improve the engineering properties of the soil. Expansive soils and stabilization linkedin slideshare. Stabilization of expansive soil by lime and fly ash. Soil stabilization methods with different materials. Trilok kumar 3 1 assistant professor, department of civil engineering, k. Stabilization of expansive soils for use in construction. Study on strength of peat soil stabilised with cement and. Swelling potential behavior of expansive soils treated. Expansive soils are found in every state and cover approximately onefifth of the land area. The calcium hydroxide from natural lime or cement hydration reacts chemically. Abstract lime stabilization has been and still is one of the most preferred. The stabilization is achieved by mixing soil with binding materials such as lime and cement.
Potable water is normally used for cement stabilization. Stabilization of expansive soils by using corncob ash p. B we believe that the reason is that expansive potential is not. The preliminary investigation of the soil shows that it belongs to mh class of soil by uscs aline chart soil classification system. This gives enough amount of silica that is required for pozzolanic process. Stabilization of expansive soil using industrial solid waste improves the geotechnical properties like index properties, compaction properties, ucs, cbr, and swelling properties of expansive soil. An additive for stabilization of swelling clay soils by bahia louafi and ramdane bahar. Review on stabilization of soil using coir fibre khalid fazal1 vishal gupta2. Expansive or swelling soil is a highly plastic soil that normally contains montmorillonite and other active clay minerals. Calciumbased stabilizer materials csms exhibit pozzolanic properties which improve the properties of clayey soils by hydration, cation exchange, flocculation, pozzolanic reaction, and carbonation. Foundations on expansive soils provides the practicing engineer with a summary of the stateoftheart of expansive soils and practical solutions based on the authors experience. The portland cement association pca established guidelines to for stabilizing a wide range of soils from gravels to clays. Stabilization can be used to treat a wide range of subgrade materials from expansive clays to granular.
Stabilization of subgrade soils and base materials. The portland cement association pca established guidelines to for. Testing specimens were determined and examined in chemical composition, grain size distribution, consistency limits. Upon absorbing water, their particles grow, resulting in expansion of the. Limestabilized layer see arrow bridging an erosion failure illustrates strength. Review article industrial wastes as auxiliary additives to. Therefore soil stabilization techniques are necessary to ensure the good stability of soil so that it can effectively support the load of the superstructure. Part i deals with theory and practice, and summarizes some of the theoretical physical properties of expansive soils. On the recent trends in expansive soil stabilization using.
The present paper describes a study carried out to check the improvements. On the other hand, non expansive soils are abundantly available. Professor of civil engg, lenora college of engineering, rampachodavaram 3group head soil, rockfill. Such soils swell when given an access to water and shrink when they. A study on stabilization of expansive soil by using. Lime stabilization of soils soil stabilization significantly changes the characteristics of a soil to produce longterm permanent strength and stability, particularly with respect to the action of water and frost figure 3. Pdf use of natural pozzolana and lime for stabilization of. Portland cement association 5420 old orchard road skokie, illinois 600771083 847. Jul 25, 2019 stabilization of expansive soil by industrial solid wastes by using fly ash and corex slag written by abhishek kiran bhamre published on 20190725 download full article with reference data and citations. Expansive soils present significant geotechnical and structural engineering challenges the world over, with costs associated with expansive behaviour estimated to run into several billion annually. Clay soils turn drier and less susceptible to water content changes roger et al, 1993.
Previous work on lime stabilization of clay soils 3 attributed the stabilization process to four reactions. Cement requirement by volume for an effective stabilization of various soils 1. Soil stabilization can be explained as the alteration of the soil properties by chemical or. Guidelines for chemically stabilizing problematic soils. Thus, the arid regions of the country are much more susceptible to damage from expansive soils than regions that maintain moist soil conditions throughout the year. Based on this system, soils with aashto classifications a2 and a3 are ideal for stabilization with cement, but certainly cement can be successfully used to stabilize a4 through a7 soils as well. The stabilization of expansive soils by the use of additives such as lime, fly ash or cement is well documented du et al.
Calciumbased stabilizer materials csms exhibit pozzolanic properties which improve the. Treatment of expansive soil using different additives 292 tab. In limited research, va was used to stabilize clay soil in association with other. Effect of mineral additives on the behavior of an expansive soil for. Foundations on expansive soils provides the practicing engineer with a summary of the state of theart of expansive soils and practical solutions based on the authors experience. They have been called the hidden disaster in the construction world, and result in millions of dollars in ongoing treatment, and repair of homes, commercial structures, roads and underground infrastructure throughout the country each year. Engineering properties of lime stabilized swelling soils. Reactions between lime and soils have been studied by several researchers 1, 2. This paper presents a cementitious material combined with rice husk ash rha obtained from biomass power plants and lime to stabilize expansive soil. The additives are added to the peat soil sample, as percentage of the dry soil mass in the range of 10%,30% and 50% respectively. If not they are as problematic as that of expansive soils, but require improvement in geotechnical properties before utilizing it as construction material. In the limited study, the va was used to stabilize expansive soil when compositing with lime and cement. Silica is also one of the important ingradient thus, cement. Most of the time, damage to facilities and infrastructure is significant and very costly to.
Pozzolan stabilized subgrades nebraska department of. Modification and stabilization of soils 23 txdot 092005 section 2 step 1. Stabilization of expansive soils using flyash and murrum. Expansive soil is a commonly identified problem which has. Recommended practice for stabilization of subgrade soils. What is soil stabilization soil stabilization is the permanent physical and chemical alteration of soils to enhance their physical properties.
Thompson has shown that organic matter adversely affects the pozzolanic reaction 14. Following are the various soil stabilization methods and materials. Engineering properties of an expansive soil stabilized. Soil type percent cement by volume aashto classification system unified soil classification system a2 and a3 gp, sp and sw 610 a4 and a5 cl, ml and mh 812 a6 and a7 cl, ch 1014. Potentially expansive soils find wide distribution in the philippines. Fly ash is useful in many construction applications because it is a pozzolan. As per chen 1988, amount of lime required for stabilization of expansive soils lies in between 2% to 8%.
In chemical stabilization the use of pozzolanic materials such as cement, lime, and other waste materials are well established. Numerous research studies have been conducted in the past to stabilize expansive soils by using various materials and admixtures katti, 1978. This study resulted in it change of the expansive soil texture takes place. Cementmodified soil cms is a soilaggregate material that has been treated with a relatively small proportion of portland cement in order to amend its undesirable properties so that they are suitable for use in subgrade or foundation construction. Swelling potential behavior of expansive soils treated with. Soil exploration, material sampling, and soil classification soil exploration is vital, as it provides material for testing and also reveals conditions in underlying strata that can affect the performance of the pavement structure and treated. Stabilization of algerian clayey soils with natural pozzolana and lime. Engineering and mineralogical properties of stabilized. That influence can logically be attributed to the retardation of the strengthproducing. These materials may be classified as pozzolanic fly ash, rice husk ash etc. Cement stabilization of soils foundation performance. Expansive soil occupies about 20% of geographical area in india, more specified, one fifth of land area of. Lime treated soil construction manual lime stabilization.
The new minerals, such as hydrated calcium silicate and hydrated calcium aluminate are produced to improve the water stability and strength of the expansive soils. The annual cycle of wetting and drying causes soils to shrink and swell each year. An experimental program was undertaken to study the individual and admixed effects of lime and fly ash on the geotechnical characteristics of expansive soil. Under this category, soil stabilization depends mainly on chemical reactions between stabilizer cementitious material and soilminerals pozzolanic materials to achieve the desired effect. Soil stabilization is a process by which certain materials are. The laboratory work involved index properties to classify the soil sample. Utilization of cementitious material from residual rice husk. Based on this study it is concluded that the addi tion of lime improves the engineering characteristics of the soils studied. Expansive soils are some of the most widely distributed and costly geologic hazards. Expansive soils pose the greatest hazard in regions with pronounced wet and dry seasons. A treatment of expansive soil using different additives. On the recent trends in expansive soil stabilization. Calciumbased stabilizer materials csms exhibit pozzolanic properties which improve the properties of clayey soils. Lime stabilization may refer to pozzolanic reaction in which pozzolana materials reacts with lime in presence of water to produce cementitious compounds sherwood, 1993, eurosoilstab, 2002.
Stabilization of expansive soils by using corncob ash. The problems are most often unrecognized until it is too late and most often expansion or heaving is misinterpreted as settlement. Guidelines for modification and stabilization of soils and. Ctb strength determination unconfined compressive strength testing.
Geological disasters often occur due to expansion and shrinkage properties of expansive soil. Pdf expansive soils cause serious problem in the civil engineering practice due to swell. Dry mix methods for deep soil stabilization was held in stockholm in 1999. Select geotechnical properties of a lime stabilized. It was concluded that % of lime and % of fa were optimalfor stabilization of the expansive soil. Lime stabilization of organic soils ara arman and george a. It is important to remember that soil modificationis different than soil stabilization. The utilization of va in soil stabilization reduces the consumption of cement and lime and also represents the reduction in greenhouse gas emission and energy consumption. Expansive soil, swelling, lime treatment, centrifuge. It is a method of improving soil properties by blending and mixing other materials. Natural pozzolana is unsuitable for use alone in soil stabilization. On the recent trends in expansive soil stabilization using calcium. By adding 15% of granite waste and quarry dust in the soil, it gives modified geotechnical properties.
Stabilization of expansive soil by industrial solid wastes. An introduction to soil stabilization with portland cement. Such soils contain clay particles of one or more minerals which have a strong affinity for water. Utilization of cementitious material from residual rice. Dec 16, 2017 this gives enough amount of silica that is required for pozzolanic process. The damages associated with expansive soils are not because of the. Problems in sulfate soils stabilized with limecement. Engineering properties of an expansive soil stabilized with rice husk ash and lime sludge akshaya kumar sabat. S4 1assistant professor 2,3,4ug final year students 1,2,3,4department of civil engineering 1,2,3,4trp engineering college srm groups, tiruchirappalli, tamilnadu, india. But there are certain soils, like, expansive and unstable soils that create significant problems for pavements or structures. The use of cement for finegrained soils containing more than about 1 percent sulfate should be avoided. Expansive clay soils are extensively distributed worldwide, and are a source of great damage to infrastructure and buildings.
Pdf behavior of expansive soils stabilized with fly ash. This is to certify that the thesis entitled, stabilization of expansive soils using fly ash is submitted by manmay kumar mohanty, bearing roll no. Stabilization can increase the shear strength of a soil thereby controlling the shrinkswell properties of a soil and, improving the load bearing capacity of a subgrade. Unfortunately, small content of calcium oxide in natural volcanic ashes will lead to the insufficiency of pozzolanic reaction between clay soils and such ashes. In the case of collapsible soils, lime, and bitumen emulsions have been used for loess stabilization, particularly in relation to road constructions bell 1993. Guidelines for soil stabilization the national academies press.
464 1439 1237 820 344 32 1473 280 1413 671 341 840 428 1308 103 1417 1235 788 157 681 612 17 993 764 232 554 413 501 1387 839 97 164 1460 480 1435 143 648 153 175 800 1003