TY - JOUR
T1 - Integrating lignosulphonate and hydrated lime for the amelioration of expansive soil
T2 - A sustainable waste solution
AU - Ijaz, Nauman
AU - Dai, Fuchu
AU - Meng, Lingchao
AU - Rehman, Zia ur
AU - Zhang, Hongqiu
N1 - Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2020/5/1
Y1 - 2020/5/1
N2 - A sustainable solution to utilize the paper/wood industry waste as a construction material is presented in this article. A novel technique of coupling lignosulphonate (LS) with hydrated lime (LM) is adopted to mitigate the short comings of lignosulphonate as an expansive soil stabilizer. A detailed experimental study was performed on the proposed composite binary admixture (CBA) to ameliorate the geotechnical properties of expansive soil. The optimum binary admixture (OBA) was determined on the basis of plasticity index. For the better apprehension, and further verification of optimum binary admixture, the performance of lignosulphonate was individually assessed at various percentages (0.4%, 0.875% and 2%) and in combination with different percentages of lime (2.625%, 3.82%, 5%, 6.5% and 9%). Various geotechnical properties, such as plasticity, swelling, shrinkage, strength and hydraulic conductivity were analyzed based on the test results. Stabilization mechanism was assesed by X-ray diffraction (XRD) and scanning electrone microscope (SEM). Results showed that using composite binary admixture as a stabilizer exhibits better amelioration of geotechnical properties of expansive soil than using lignosulphonate alone. Whereas, the optimum value of the composite binary admixture was determined to be 3.5% to adequately stabilize the expansive soil. During the stabilization process, the intrinsic structure of clay mineral was observed to be destructed and resulted in the formation of a more stable structure, owing to the ability of the added admixture to trigger the intermolecular interaction and chemical reaction with the clay minerals. Overall, lignosulphonate addition reduces the lime consumption in expansive soil stabilization and also provides a sustainable solution in curtailing the industrial waste.
AB - A sustainable solution to utilize the paper/wood industry waste as a construction material is presented in this article. A novel technique of coupling lignosulphonate (LS) with hydrated lime (LM) is adopted to mitigate the short comings of lignosulphonate as an expansive soil stabilizer. A detailed experimental study was performed on the proposed composite binary admixture (CBA) to ameliorate the geotechnical properties of expansive soil. The optimum binary admixture (OBA) was determined on the basis of plasticity index. For the better apprehension, and further verification of optimum binary admixture, the performance of lignosulphonate was individually assessed at various percentages (0.4%, 0.875% and 2%) and in combination with different percentages of lime (2.625%, 3.82%, 5%, 6.5% and 9%). Various geotechnical properties, such as plasticity, swelling, shrinkage, strength and hydraulic conductivity were analyzed based on the test results. Stabilization mechanism was assesed by X-ray diffraction (XRD) and scanning electrone microscope (SEM). Results showed that using composite binary admixture as a stabilizer exhibits better amelioration of geotechnical properties of expansive soil than using lignosulphonate alone. Whereas, the optimum value of the composite binary admixture was determined to be 3.5% to adequately stabilize the expansive soil. During the stabilization process, the intrinsic structure of clay mineral was observed to be destructed and resulted in the formation of a more stable structure, owing to the ability of the added admixture to trigger the intermolecular interaction and chemical reaction with the clay minerals. Overall, lignosulphonate addition reduces the lime consumption in expansive soil stabilization and also provides a sustainable solution in curtailing the industrial waste.
KW - Composite binary admixture
KW - Lignosulphonate
KW - Mineralogical changes
KW - Soil stabilization
KW - Sustainable waste solution
UR - http://www.scopus.com/inward/record.url?scp=85078014860&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2020.119985
DO - 10.1016/j.jclepro.2020.119985
M3 - Article
AN - SCOPUS:85078014860
SN - 0959-6526
VL - 254
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
M1 - 119985
ER -