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Improved subgrades
Published in Burt G. Look, Earthworks, 2023
There are three lime types: (1) agricultural lime, (2) quicklime, and (3) hydrated lime. Figure 12.3-3 provides a summary of key properties of these lime types. Hydrated lime tends to be used in the laboratory, but quicklime is used more extensively in the field. For conversion, 3% quicklime is approximately 4% hydrated lime.
Soils with Chemical Problems
Published in Manorama K.C. Thampatti, Problem Soils, 2023
Application of small amounts of lime in every year or twice in a year is highly effective. Lime should be applied well in advance to the sowing and fertiliser application. Lime can be broadcasted to the soil and should be thoroughly mixed with soil. Economic and efficient liming materials may be selected for application.
Lime
Published in A. Bahurudeen, P.V.P. Moorthi, Testing of Construction Materials, 2020
[IES 2020] Pick up the correct statement Lime is available in free state.Lime is made from gypsum.Lime is made from dolomite/calcium carbonate.None of the above
Effect of Deep Remediation and Improvement on Bearing Capacity and Settlement of Piled Raft Foundation Subjected to Static and Cyclic Vertical Loading
Published in Geomechanics and Geoengineering, 2022
Mahdi O. Karkush, Mahmoud S. AbdulKareem, Hadeel Dekhn
Hamby (Hamby 1996) summarised and classified the soil remediation techniques based on removal efficiency, cost and technological development needs. The lime piles are holes, with specific depth, diameter and distribution pattern, drilled in the soil and filled with lime which is used in the improvement of soft soil and treatment of contaminated soils. The shear strength of improved soil by lime-cement columns is usually higher than that of improved soil by lime when the sand and silt contents are higher than clay content (Moseley and Kirsch 2004). Lime and lime-cement columns can be used in deep soil improvement and remediation of oil contaminated soil. The lime and cement are mainly used to increase the strength and stability of the soil and reduce the settlement of roads and rail roads. Lime is also used to increase the stability of trenches for sewer lines (Broms 2000). The pozzolana reactions that occur in the soil-lime pile lead for a long-term increase in the strength of soil (Ashok and Reddy 2016).
Compaction delay and its effect on the geotechnical properties of lime treated semi-arid soils
Published in Road Materials and Pavement Design, 2021
Arif Ali Baig Moghal, Mohammed Ashfaq, Ali Abdul Kareem Hamood Al-Obaid, Mohammad Farid Abbas, Ahmed Mohammed Al-Mahbashi, Abdullah Ali Shaker
Expansive soils are prone to rapid volume changes due to their expanding lattice structures with seasonal changes in moisture content. Stabilisation through chemical and mechanical techniques are widely adopted to mitigate the problems posed by expansive soils. Soil compaction is the process by which soil is mechanically compacted by pressing the soil particles together in a close state of contact thereby enhancing the soil properties (Lai et al., 2011; Prashanth et al., 1998). Compaction decreases compressibility, hydraulic conductivity and increases the strength properties of soil (Mitchell & Soga, 2005). In chemical stabilisation, the problematic soils are treated with suitable chemicals to induce mineralogical changes which enhance its geotechnical properties (Lees et al., 1982; Ola, 1978; Tonoz et al., 2004). In attempting chemical stabilisation, the soil is mixed thoroughly with stabilisers prior to compaction. Among the various additives, due to its ability to reduce the plasticity and the maximum dry density (MDD) of expansive soils, lime has been extensively used in various Civil Engineering works like the construction of embankments, highways and buildings (Al-Mahbashi et al., 2020; Bell, 1998; Croft, 1964; Cuisinier et al., 2011; Efsahani, 2020; Hussain & Dash, 2016; Ismeik & Shaqour, 2020; Lees et al., 1982; Moghal et al., 2018; Ola, 1978; Thompson, 1966; Tonoz et al., 2004).
Lime stabilization to improve clay-textured forest soil road subgrades
Published in International Journal of Forest Engineering, 2021
Generally, results indicated that at the 9% level there was a change in soil type and many physical properties of fine-grained soil used for forest road construction. It is important to state that the results discussed here were for a single soil type (i.e. CH type) and the other factors, such as different soil and lime type, curing time, depth of treatment and compactive effort should also be taken into account before determining any general rule for lime stabilization. Further field studies on the efficiency of lime treatment are required to recommend the optimum amounts of lime and verify the current laboratory results. In addition, with the advent of polymer stabilizers, some fieldwork may be necessary to compare the efficiency, efficacy, and cost of both lime and polymer stabilization to improve forest road soils. Lime may be useful to change soil mechanical and physical properties, but it can also change soil chemical properties near the road which may affect water, plants, and animals. Therefore, investigations are also needed on the effect of lime treatment on soil biological properties, plant community dynamics, and aquatic ecosystems.