Stabilization of organic soil using sodium silicate system grout

Abstract

Cation binding by organic matter content (OMC) in soils has consequences for the behaviour of the organic compounds themselves, influencing adsorption, aggregation, and solubility, and thereby soil structure, translocation of organic matter within soils, and transport to waters. The study reported here involved a number of experiments using composition of alkaline earth metals grout to treat organic soils, in order to provide a better understanding of the engineering behaviour of this soil after stabilization. Besides, it provides a series of the laboratory mix design and testing which in turn provide an essential guide regarding the choice, dosage and economical amount of chemical binders. We carried out a series of batch test using composition of sodium silicate system binders to find their effects on physic-chemical properties of the organic soil. The results show that in the batch tests unconfined compressive strength (UCS), increases of up to 220% of the soil's baseline strength can be achieved by adding the 3 mol/L Na 2 Sio 3 , while UCS results enhanced to 270% having an activator CaCl 2 and/or Al 2 (SO 4) 3 additives. Moreover, using higher molarities of CaCl 2 (for example, 1mol/L) did not show any remarkable effect on the UCS results.

Cementitious, Pozzolanic And Filler Materials For DSM Binders

“…There are two classes of fly ash: Class F FA requires an activator or cementing agent (as it contains less lime (CaO) content) mixed with water. It can form a geopolymer by combining with sodium silicate/ sodium hydroxide [59]. When utilized to stabilize soft organic soils, the addition of fly ash increases soil resilient modulus (Mr) from zero Mr without a binder to 10-100 MPa depending on % of binder used and improves unconfined compressive strength (UCS) from original untreated at 15 kPa to > 100 kPa with fly ash [60].…”

Relationship between Phase Composition and Mechanical Properties of Peat Soils Stabilized Using Oil Shale Ash and Pozzolanic Additive

“…To achieve mass stabilization, the peat soil is mixed with a dry or a wet binder and additives (CaCl 2 , Al 2 (SO 4 ) 3 , or SiO 2 ) throughout the volume of the treated soil column. Common binders include Portland cement, quicklime, and gypsum [3,10]. Environmentally sustainable waste-based binders applied for stabilization of various soils (peaty, clayey or sandy soils) may include calcareous fly ashes [11], carbide lime [12], or phosphogypsum [10].…”

“…Environmentally sustainable waste-based binders applied for stabilization of various soils (peaty, clayey or sandy soils) may include calcareous fly ashes [11], carbide lime [12], or phosphogypsum [10]. In order to facilitate the hardening of the soil-binder mixture, pozzolanic agents like silica fume, waterglass, alumino-siliceous fly ash, granulated blast furnace slag, ground glass, bentonite, kaolin, or other siliceous and alumino-siliceous materials can be used [3,9,10,13]. Soluble calcium or aluminum salts such as CaCl 2 or Al 2 (SO 4 ) 3 can be added as supplementary Ca and Al sources [9,10,13,14].…”

“…In order to facilitate the hardening of the soil-binder mixture, pozzolanic agents like silica fume, waterglass, alumino-siliceous fly ash, granulated blast furnace slag, ground glass, bentonite, kaolin, or other siliceous and alumino-siliceous materials can be used [3,9,10,13]. Soluble calcium or aluminum salts such as CaCl 2 or Al 2 (SO 4 ) 3 can be added as supplementary Ca and Al sources [9,10,13,14]. Peat soils contain a high percentage of organic material and few to no solid mineral particles.…”

Humics‐based interpolyelectrolyte complexes for antierosion protection of soil: Model investigation

“…Chemical reagents silicates (Moayedi, Huat, Kazemian, & Daneshmand, 2012), calcium carbonate (Krajewska, 2017), epoxy resin polymer (Naeini & Ghorbanalizadeh, 2010), polymer mulch and films (Kasirajan & Ngouajio, 2012), latex formulations (Al-Khanbashi & Abdalla, 2006), and so forth have shown themselves as fast and effective techniques for agrotechnical soil conservation; among which, the polymer-based approaches are of particular interest. It was shown in particular that water-soluble polymers, being deposited over soil, glue soil particles into larger aggregates (Homauoni & Yasrobi, 2011;Maghchiche, Haouam, & Immirzi, 2010;Mamedov, Beckmann, Huang, & Levy, 2007).…”