Problem of High Embankment on Clay Shale at Semarang-Ungaran Toll Road Sta 5 +500 to 6 +300

Muhrozi,; Wardani, Sri Prabandiyani Retno

doi:10.1142/9789814365161_0014

Cited by 4 publications

(3 citation statements)

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“…Consequently, the degradation of clay shale can cause construction damage [3]. Even where pavement structure covers the soil, problems can arise from sub-surface weathering after the compaction of clay shale as a road subgrade [4].…”

Section: Introductionmentioning

confidence: 99%

Stabilisation of Degraded Clay Shale With the Geopolymer Injection Method

2023

GEOMATE

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Geopolymer injection is a method for increasing the strength of degraded clay shale. Clay shale is a type of mud rock with low durability. Samples of clay shale were exposed to weather changes and in an open field to observe weathering and degradation. A series of laboratory experiments was also conducted on reconstituted clay shale specimens. The primary objective of this research was to investigate the factors influencing the distribution of geopolymer injected into compacted clay shale. The strength index of stabilised clay shale was examined in terms of unconfined compressive strength. Soil density was varied with three relative compaction values, namely, 0.75, 0.85 and 0.95, of the maximum dry density, which correspond to porosity of 0.54, 0.48 and 0.42, respectively. Geopolymer was varied in four activator-fly ash ratios, namely, 0.5, 0.75, 1, and 1.25. An empirical equation was developed for calculating the volume of the injected geopolymer and the radius of the soil-grout column. This equation is a function of injection pressure, duration, geopolymer viscosity and air void porosity. The unconfined compressive strength of the compacted clay shale increased up to five times after geopolymer grouting. The contribution of geopolymer injection is correlated with the size or volume of the soil-grout column.

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Section: Introductionmentioning

confidence: 99%

Stabilisation of Degraded Clay Shale With the Geopolymer Injection Method

2023

GEOMATE

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“…The soils are typically a problematic soil, which caused the construction failure, e.g. at Semarang-Bawen toll road section [1], and Cipularang toll road section [2]. Those soils were susceptible to weathering and strength degradation [3]- [7].…”

Section: Introductionmentioning

confidence: 99%

Slake Durability of the Compacted-Siltstone Fragment With Cement Stabilization

Hartono¹,

Wardani²,

Muntohar³

2019

GEOMATE

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Cement stabilization is a practical improvement method of the soil bearing capacity of problematic soils. Soil bearing capacity is attributed to its strength and durability. The decrease in durability can be caused by weathering. On this account, to improve the long-term behavior of soil experiencing weathering process, it is necessary to apply cement stabilization to ensure the quality of road performance. This paper presents the results of a laboratory investigation on slaking index and the physical change of cementstabilized soil. A new sample preparation method of stabilized soil is presented in this study for the slakedurability test. The cement content was varied from 2 to 10 percent of the dry soil. The test results show that the unstabilized compacted-siltstone was ruined on the first test cycle. In general, the degree of slaking (Is) increases with the slaking cycle but decreases with the cement content. Whereas, the slaking durability index (Id(2)) increases as cement content increases. A large quantity of cement was required to obtain a successful stabilization. This study recommends that 7% of cement is suitable for soil modification, while 10% of cement satisfies the requirement for stabilization.

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“…The rock is easy undergoes weathering if exposed and undergo repeated wetting and drying process even in just one cycle [4]. Muhroji and Wardani [5] reported that the typical mud rock, such as shale along the toll road has a high SPT value, but they generated instability of the roadway embankment.…”

Section: Introductionmentioning

confidence: 99%

The effect of cement stabilization on the strength of the Bawen’s siltstone

2018

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Siltstones are predominantly found along the Bawen toll-road. Siltstone is degradable soil due to weather session. The soil is susceptible to the drying and wetting and the changes in moisture content. Thus, Siltstone is problematic soils in its bearing capacity when served as a subgrade or subbase. The main objective of this study was to investigate the effect of cement stabilization on the strength of Siltstone. The primary laboratory test to evaluate the strength was Unconfined Compression Strength (UCS) and California Bearing Ratio (CBR). The cement content was varied from 2 to 12 per cent by weight of the dry soil. The soils were collected from the Ungaran - Bawen toll road. The specimens were tested after seven days of moist-curing in controlled temperature room of 25°C. The CBR test was performed after soaking under water for four days to observe the swelling. The results show that the mudstones were less swelling after soaking. Cement-stabilized siltstone increased the CBR value and the UCS significantly. The addition of optimum cement content for siltstone stabilization was about 7 to 10 per cent.

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Problem of High Embankment on Clay Shale at Semarang-Ungaran Toll Road Sta 5 +500 to 6 +300

Cited by 4 publications

References 0 publications

Stabilisation of Degraded Clay Shale With the Geopolymer Injection Method

Stabilisation of Degraded Clay Shale With the Geopolymer Injection Method

Slake Durability of the Compacted-Siltstone Fragment With Cement Stabilization

The effect of cement stabilization on the strength of the Bawen’s siltstone

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