“…Besides, cohesion of stabilized soil substantially increased to 49 Kpa higher than corresponding basic subgrade soil (15 Kps). The results indicate that increment different proportions of green nanosilica often lead to an effective increase of soil cohesion and therefore, enhances the strength of nanosilica-stabilized soil 44 .Figure 9The effect of varying biological silica NPs content on subgrade soil cohesion (C).…”
This study reports the synthesis and potential application of biocompatible silica nanoparticles for subgrade soil stabilization. Nanosilica preparation as a major component from wheat husk ash is systematically studied and confirmed by FTIR, ICP, XRD, and TEM analyses. The produced biogenic nanosilica showed an amorphous structure with an average size of 20 nm. Upon loading various green nanosilica contents, our results show an improvement in the key parameters including Atterberg’s limits, maximum dry density, optimum water content, and shear strength of treated soil. Under optimal loading condition, the nanosilica-mediated soil analyses reveal a significant increase in the plastic and liquid limits by factors of 1.60 and 1.24 whereas plasticity index is declined by a factor of 0.78 rather than untreated soil specimen. The treated soil demonstrates a superior increase in the angle of internal friction, cohesion, shear strength, and maximum dry unit weight by factors of 2.17, 3.07, 2.21 and 1.5, respectively. The California Bearing Ratio (CBR) strength of nanosilica-cured soil presents a substantial increase by a factor of 5.83 higher than the corresponding original subgrade soil. We obtained the maximum increase in strength parameters of modified soil at the optimum biogenic nanosilica content of 1.5%.
“…Besides, cohesion of stabilized soil substantially increased to 49 Kpa higher than corresponding basic subgrade soil (15 Kps). The results indicate that increment different proportions of green nanosilica often lead to an effective increase of soil cohesion and therefore, enhances the strength of nanosilica-stabilized soil 44 .Figure 9The effect of varying biological silica NPs content on subgrade soil cohesion (C).…”
This study reports the synthesis and potential application of biocompatible silica nanoparticles for subgrade soil stabilization. Nanosilica preparation as a major component from wheat husk ash is systematically studied and confirmed by FTIR, ICP, XRD, and TEM analyses. The produced biogenic nanosilica showed an amorphous structure with an average size of 20 nm. Upon loading various green nanosilica contents, our results show an improvement in the key parameters including Atterberg’s limits, maximum dry density, optimum water content, and shear strength of treated soil. Under optimal loading condition, the nanosilica-mediated soil analyses reveal a significant increase in the plastic and liquid limits by factors of 1.60 and 1.24 whereas plasticity index is declined by a factor of 0.78 rather than untreated soil specimen. The treated soil demonstrates a superior increase in the angle of internal friction, cohesion, shear strength, and maximum dry unit weight by factors of 2.17, 3.07, 2.21 and 1.5, respectively. The California Bearing Ratio (CBR) strength of nanosilica-cured soil presents a substantial increase by a factor of 5.83 higher than the corresponding original subgrade soil. We obtained the maximum increase in strength parameters of modified soil at the optimum biogenic nanosilica content of 1.5%.
“…Meanwhile plasticity index result showed decrement after addition of series percentage of WPSA. Previous study showed the decrement of plasticity index after mixing with additives are the indication of soil improvement [9,6]. The results for standard compaction curve and modified compaction curve for stabilized soft soil with different percentage of WPSA and unstabilized soft soil shown in Figure 2.…”
The effect of recycled aggregate concrete incorporating waste paper sludge ash as partial replacement of cement AIP Conference Proceedings 1774, 030007 (2016) Abstract. This paper presents the laboratory result on compaction characteristic for soft soil subgrade which was stabilized by using waste paper sludge ash (WPSA). The soft soil sample was collected from Banting Selangor, Malaysia named as Banting soft soil and classified as slightly sandy Clay with intermediate plasticity. Additive of WPSA is a finely waste product produced from the incinerated waste paper. In ASTM C618, this WPSA samples are categorized as Type-C fly ash due to the high free lime (CaO) content (>20%) and possesses some cementitious and pozzolanic, resulting in the self-cementing characteristics. Therefore no entire activators such as lime are required. Objectives of this study are to determine the dry density and moisture content of Banting soft soil stabilized by WPSA through the different energy and method of compaction and to determine the Atterberg limit properties of Banting soft soil stabilized using WPSA. Several percentage of WPSA (4%, 8%, 12% and 16%) was used to stabilize the soft soil. Meanwhile the compactions methods are used in this study are standard proctor test and modified proctor test. The Atterberg limit properties testing involved the liquid limit testing, and plastic limit testing. The result showed the plasticity indexes of soft soil stabilized with series percentage (4%, 8%, 12% and 16%) of WPSA were reduced parallel to the increment of liquid limit and plastic limit result. Meanwhile, the compaction result for stabilized soft soil showed an increment dry density value followed by decrement of moisture content for modified compaction and standard compaction. However, 4% WPSA were giving the best of optimum moisture content and maximum dry density stabilized soft soil from modified compaction. From this experimental study, it shows that WPSA has a significant and effective to improve the geotechnical properties of soft soil.
“…Finally, a recommendation is made regarding the use of nano materials because they are susceptible to particle agglomeration, which can have adverse effects on the mechanical properties of the soil [39] - [41]. However, there are studies in which the use of nanoclays has worked to improve the geotechnical properties of soft soils with a slight presence of sand, since the addition of 2% to 4% of these nanoparticles increased the compressive strength by up to 22%, the angle of internal friction by up to 17% and a decrease in the plasticity index of up to 25% [42]; and it is even seen as a nano material with potential for use in civil engineering with the addition of polymers for the use of a lower percentage of filler in mixtures, showing benefits over fiber composites [43].…”
Section: Use Of Nanotechnology To Stabilize Soilsmentioning
Nano materials are becoming more and more relevant in the construction of civil works, since they can be used as additions or additives to improve and stabilize asphalt concretes, hydraulic concretes, fine soils at the level of subgrade, sub-bases, bases and even for filters in water treatment. The present article intends to collect the different experiences in the use of nano materials, in order to stabilize or improve the mechanical and geotechnical properties of soils used in road construction, especially what has to do with the manufacture of nano fibers for use in soils; finding that its use in the field of roads is to be investigated and developed with different types of solutions, as the most studied are the carbon nano fibers
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