Utilization of Cementitious Material from Residual Rice Husk Ash and Lime in Stabilization of Expansive Soil

Abstract

Geological disasters often occur due to expansion and shrinkage properties of expansive soil. This paper presents a cementitious material combined with rice husk ash (RHA) obtained from biomass power plants and lime to stabilize expansive soil. Based on compressive and flexural strength of RHA-lime mortars, blending ratio of RHA/lime was adopted as 4 : 1 by weight for soil stabilization. When mix proportion of RHA-lime mixture varied from 0% to 20%, specific surface area of stabilized expansive soil decreased dramatically and medium particle size increased. The deformation and strength properties of stabilized expansive soil were investigated through swelling test, consolidation test, unconfined compression test, direct shear test, and so on. With increase in RHA-lime content and curing time, deformation properties including swelling potential, swelling pressure, compression index, crack quantity, and fineness of expansive soil lowered remarkably; meanwhile, strength properties involving unconfined compressive strength, cohesion, and internal friction angle improved significantly. Considering engineering performance and cost, mix proportion of 15% and initial water content of 1.2 times optimum moisture content were recommended for stabilizing expansive soil. In addition, effectiveness of RHA-lime to stabilize expansive soil was achieved by replacement efficiency, coagulation reaction, and ion exchange.

On the Recent Trends in Expansive Soil Stabilization Using Calcium‐Based Stabilizer Materials (CSMs): A Comprehensive Review

“…e reasons which draw the attention of geotechnical engineers to 4 Advances in Materials Science and Engineering employ CSM are as follows: (1) the replacement with coarse grained materials may be uneconomical because the expansive soil layers are extended deep and in irregular pattern, (2) the presence of Ca 2+ ions speeds up the pozzolanic reactions [63] and tends to decrease the P s , (3) it is a hot topic and is widely practiced in field nowadays, (4) the prewetting technique among other takes higher time (several years) for soils with low hydraulic conductivity [73], and (5) recycling gains environmental and economic benefits by reducing the usage of natural resources which leads to development of low-emission and low-energy technologies [74]. e stabilizing materials with Ca 2+ lower down the P s by two mechanisms: (1) by stabilizing the structure of clay particles using cation exchange and (2) by increasing the concentration of cations held between soil within water and thus depleting the double layer thickness [72]. sewage sludge ash (SSA), palm oil fuel ash (POFA), fuel oil fly ash (FOFA), groundnut shell ash (GSA) [12,34,[75][76][77][78], are employed in geotechnical engineering.…”

“…Ca based materials (CSMs): lime [12,[104][105][106], cement [107], FA [12,24], SF [108], GGBS [109], BA [76,110], CCR [72], POFA [111], GSA [93] (i) Long-term strength is achieved as a result of pozzolanic reaction which is timedependent and lasts for longer duration.…”

“…Expansive soil damage to civil engineering infrastructure across Oman, KSA, Pakistan, and USA (with some changes for comparison purpose)[62,[69][70][71]. Morphology of cracks in expansive soil (LL � 77.6%, PI � 40.7%, MDD � 1.47 g/cm3 , and OMC � 28%) after blending with several mixtures of calcium carbide residue (CCR) and rice husk (RHA) and cured for 28 days[72].…”

Comparison of Environmental Impacts of Two Alternative Stabilization Techniques on Expansive Soil Slopes

“…In the chemical treatment, different additives, including lime or cement, are mixed into expansive soil to improve the physical and mechanical properties (strength, stiffness, California bearing ratio (CBR), durability, etc.) [6,7]. e sustainable and relatively slow pozzolanic reaction between lime and expansive soils in a high pH environment is the key to the effective and durable stability of lime-soil mixture [8].…”

Effect of Curing on Micro-Physical Performance of Polypropylene Fiber Reinforced and Silica Fume stabilized Expansive Soil Under Freezing Thawing Cycles

“…The major deterioration was espied on the canals, pathways, buried pipelines, and paved structures. The numerous remedies were successfully demonstrated to improve the engineering behavior of the expansive soil, such as chemical alternation additive [9][10][11][12][13] , moisture control 14,15 , application of adequate surcharge pressure 16 , Biocementation 17 , biochemical [18][19][20] , and Geosynthetic [21][22][23] .…”