Improved strength and reduced permeability of stabilized peat: Focus on application of kaolin as a pozzolanic additive

Compressibility Characteristics of Compacted Clay Treated with Cement, Peat Ash and Silica Sand

“…Indeed, peat ash played a key role at inducing secondary pozzolanic activity of the stabilized soil specimen. Since, pozzolanic materials in the form of peat ash are capable to react with calcium hydroxide released from cement hydrolysis to produce secondary cementation products (Wong et al 2013).…”

“…The chemical composition of the materials by the percentage of the total chemical composition's weight from X-ray Fluorescence (XRF) tests are also indicated in Table 1, according to which, in peat ash the sum of silica (SiO 2 ) and alumina (AL 2 O 3 ) is 72.6793% of the total chemical composition. This is attributed to the pozzolanic properties of the peat ash as justified by Wong et al (2013).…”

“…Such soils need to be improved so as to meet the geotechnical requirements of the correspondent engineering application (Eberemu 2015). Previous studies have proven that it is viable to use waste materials as partial cement replacement materials to stabilize soft soils (Baghdadi 1990;Collins & Emery 1983;Purwana & Nikraz 2013;Wong et al 2013;Yilmaz & Ozaydin 2013). According to Isaia et al (2003) and Wong et al (2013), pozzolanic materials have many advantages such as CO 2 emission reduction when they used as replacement materials for Portland cement.…”

“…Previous studies have proven that it is viable to use waste materials as partial cement replacement materials to stabilize soft soils (Baghdadi 1990;Collins & Emery 1983;Purwana & Nikraz 2013;Wong et al 2013;Yilmaz & Ozaydin 2013). According to Isaia et al (2003) and Wong et al (2013), pozzolanic materials have many advantages such as CO 2 emission reduction when they used as replacement materials for Portland cement. In essence, utilization of peat ash as a partially substitute material for cement in stabilized soil provides a solution for CO 2 emission reduction, which in turn can reduce energy consumption of cement production and global warming as well.…”

“…It has three different types, namely fibric, hemic and sapric. Utilization of waste materials such as peat has been the focus of research lately in the field of geotechnical engineering for economic, environmental and technical reasons (Mousavi & Wong 2015;Wong et al 2013). Besides, soft clay is problematic due to its poor mechanical behavior; particularly in some cases the soil properties in the immediate vicinity of the construction work such as road embankment may not meet the required specifications.…”