The Effect of Curing Temperature and Rice Husk Ash Addition on the Behaviour of Sulfate-Rich Clay after Lime Stabilization

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and Rice Husk Ash Addition on the Behaviour of Sulfate-Rich Clay after Lime Stabilization</title> <meta name="description" content="The Effect of Curing Temperature and Rice Husk Ash Addition on the Behaviour of Sulfate-Rich Clay after Lime Stabilization"> <meta name="keywords" content="durability, expansion, lime stabilization, rice husk ash, sulfate"> <meta name="viewport" content="width=device-width, initial-scale=1, minimum-scale=1, maximum-scale=1, user-scalable=no"> <meta charset="utf-8"> <link href="https://cdn.waset.org/favicon.ico" type="image/x-icon" rel="shortcut icon"> <link href="https://cdn.waset.org/static/plugins/bootstrap-4.2.1/css/bootstrap.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/plugins/fontawesome/css/all.min.css" rel="stylesheet"> <link href="https://cdn.waset.org/static/css/site.css?v=150220211555" rel="stylesheet"> </head> <body> <header> <div class="container"> <nav class="navbar navbar-expand-lg navbar-light"> <a class="navbar-brand" 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</div> <div class="card publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">The Effect of Curing Temperature and Rice Husk Ash Addition on the Behaviour of Sulfate-Rich Clay after Lime Stabilization</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=E.%20Bittar">E. Bittar</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Qui%C3%B1onez"> A. Qui帽onez</a>, <a href="https://publications.waset.org/abstracts/search?q=F.%20Mencia"> F. Mencia</a>, <a href="https://publications.waset.org/abstracts/search?q=E.%20Aguero"> E. Aguero</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Delgado"> M. Delgado</a>, <a href="https://publications.waset.org/abstracts/search?q=V.%20Arriola"> V. Arriola</a>, <a href="https://publications.waset.org/abstracts/search?q=R.%20L%C3%B3pez"> R. L贸pez</a> </p> <p class="card-text"><strong>Abstract:</strong></p> In the western region of Paraguay, the poor condition of the roads has negatively affected the development of this zone, where the absence of petrous material has led engineers to opt for the stabilization of soils with lime or cement as the main structure for bases and subbases of these roads. In several areas of this region, high sulfate contents have been found both in groundwater and in soils, which, when reacted with lime or cement, generate a new problem instead of solving it. On the other hand, the use of industrial waste as granulated slag and fly ash proved to be a sustainable practice widely used in the manufacture of cement, and now also, in the stabilization of soils worldwide. Works related to soils containing sulfates stabilized either with granulated slag or fly ash and lime shown a good performance in their mechanical behaviour. This research seeks to evaluate the mechanical behaviour of soils with high contents of sulfates stabilized with lime by curing them both, at the normalized temperature (23 ± 2 °C) and at 40 ± 2 °C. Moreover, it attempts to asses if the addition of rice husk ash has a positive influence on the new geomaterial. The 40 ± 2 °C curing temperature was selected trying to simulate the average local temperature in summer and part of spring session whereas rice husk ash is an affordable waste produced in the region. An extensive experimental work, which includes unconfined compression, durability and free swell tests were carried out considering different dry unit weights, lime content and the addition of 20% of rice husk ash. The results showed that the addition of rice husk ash increases the resistance and durability of the material and decreases the expansion of this, moreover, the specimens cured at a temperature of 40 ± 2 °C showed higher resistance, better durability and lower expansion compared to those cured at the normalized temperature of 23 ± 2 °C. <iframe src="https://publications.waset.org/abstracts/106577.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=durability" title="durability">durability</a>, <a href="https://publications.waset.org/abstracts/search?q=expansion" title=" expansion"> expansion</a>, <a href="https://publications.waset.org/abstracts/search?q=lime%20stabilization" title=" lime stabilization"> lime stabilization</a>, <a href="https://publications.waset.org/abstracts/search?q=rice%20husk%20ash" title=" rice husk ash"> rice husk ash</a>, <a href="https://publications.waset.org/abstracts/search?q=sulfate" title=" sulfate"> sulfate</a> </p> <a href="https://publications.waset.org/abstracts/106577/the-effect-of-curing-temperature-and-rice-husk-ash-addition-on-the-behaviour-of-sulfate-rich-clay-after-lime-stabilization" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/106577.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">122</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" 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The Effect of Curing Temperature and Rice Husk Ash Addition on the Behaviour of Sulfate-Rich Clay after Lime Stabilization