Improving geotechnical properties of a sand-clay soil by cement stabilization for base course in forest roads

Abstract

The study evaluated the chemical stabilization of soils with cement toward application in improving forest roads, as constructive alternative of low cost. The study was carried out with fine soils from the region of Niquelândia-GO, where the sand-clay-silt particle proportion was predominant, and Portland cement CP-II-Z-32 used as a stabilizing agent at 2% under dry soil weight. Geotechnical tests were conducted in different compaction energies (normal, intermediate and modified) and curing periods (1, 7 and 28 days), and the data were analyzed statistically by Analysis of Variance (ANOVA) and Tukey test. The soil-cement mixture presented higher unconfined compressive strength (UCS) than the compacted local soil, reaching a highest value of 650.52 kPa on modified compaction energy. Also, California bearing ratio (CBR) with values of 44.1% in the intermediate compaction energy and 41.7% in the modified compaction energy reached higher values compared to lateritic soil sampled. Soil-cement mixture was prescribed as improved layer for forest road surface, as well as reached indication for subgrade reinforcement material and sub-base in conventional paved roads.

Peningkatan CBR Dan Penurunan Potensi Pengembangan Pada Tanah Dengan Stabilisasi Difa Soil Stabilizer

“…Peningkatan nilai CBR tanah dapat dilakukan dengan cara stabilisasi. Stabilisasi merupakan cara untuk memperbaiki kerapatan tanah dengan metode kimiawi dengan menambahkan bahan aditif ke dalam tanah [6], [7]. Salah satu bahan aditif yang dapat digunakan untuk stabilisasi tanah adalah Difa Soil Stabilizer (DSS) [8].…”

Mechanical strength investigation of chemically reinforced sandy soil using organic copolymers for geotechnical engineering applications

“…Therefore, chemical reinforcement of sandy soil is widely employed in geotechnical engineering [4]. The traditional sand reinforcement agents are lime [5], fly ash [6], gypsum [7], cement [8], zeolite [9][10][11], etc. Though these reinforcement agents for improvement have apparent advantages, the modifications made using these chemical additives often increase the modified sand's pH value and cause groundwater pollution and other environmental issues [4].…”

Resilient Module Soil-Cement Prediction based on Setting Temperature

“…The ASTM D6236-11 (ASTM International, 2011) guide states that control of the final resistance of Soil Cement (SC) must be carried out by extracting nuclei in the field after its maturation stage, and that its results must be compared with a mixture design validated in a laboratory (Emmert et al 2017). However, the resistance of Soil Cement (SC) is influenced by multiple factors, such as the type of cement and its quantity in the mix, the water content, the degree of compaction, the uniformity of the compacted layer, the curing conditions, and the age of maturity (Ghanizadeh, Rahrovan, and Bafghi, 2018;Linares-Unamunzaga, Pérez-Acebo, Rojo, and Gonzalo-Orden, 2019;Estarbragh and Ranjbari, 2017).…”