Performance of Subbase Layer with Geogrid Reinforcement and Zeolite-Waterglass Stabilization

Harianto, Tri

doi:10.28991/cej-2022-08-02-05

Cited by 15 publications

(10 citation statements)

References 16 publications

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“…The excavation of the field test, as shown in Fig. Figure 2 shows a cross-section of the excavation measuring 200 cm in length, 100 cm in width, and 30 cm in depth to simulate conditions of substandard CBR value (below 6%), which is frequently observed in soft soil [15]. Using a CBR value of 5.3%, the subgrade layer was prepared.…”

Section: Excavation Of Field Testmentioning

confidence: 99%

Soil Mechanical Characteristics Improvement With Bacterial Biocementation Technology

2024

GEOMATE

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The aim of this study is to establish a subgrade layer by field-scale testing using a 6% Bacillus subtilis bacterial solution in Microbially Induced Calcite Precipitation (MICP), altering the bacterial culture's age by four days and curing it for 150 days. Field-scale testing was carried out, starting with soil property tests, followed by tank tests, bacterial growth, and soil mechanical tests using bacterial solutions. The study found that on the field model scale, the unconfined compressive strength increased with the lengthening of the curing period. However, because of the influence of rainfall, high rainfall lowers the soil's carrying capacity. In the 14-day to 45-day test, there is a difference in carrying capacity between layer 1 (0-15 cm) and layer 2 (15-30 cm). Comparing Layers 1 and 2, Layer 1 has a higher (qu) value, but Layer 2 has a higher (qu) value during the 60-150 days test. The optimal value of CBR with MICP stabilization is 20% after 150 days of curing. This increased by four times as compared to soil without bacterial stabilization, while the optimum value of compressive strength increased by three times. The SEM analysis reveals that MICP caused calcite to appear on the soil's surface. The results indicated that bacterial bio cementation stabilization is an alternative method of soil improvement that can enhance the mechanical characteristics of the soil, beneficial for the construction of infrastructure, and is environmentally benign.

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Section: Excavation Of Field Testmentioning

confidence: 99%

Soil Mechanical Characteristics Improvement With Bacterial Biocementation Technology

2024

GEOMATE

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“…There are various ways to improve the soil's geotechnical properties, either through soil reinforcement or soil improvement. Soil reinforcements that are commonly used are: using a timber-based raft pile [1], geosynthetics [2][3][4], and using fiber as an additional in the soil mixtures [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…The soil improvement techniques can be mechanical or chemical stabilization. Many kinds of materials are already practical as stabilizing agents in soil mixtures, such as cement [7], lime [8], zeolite [4], and bacteria [9].…”

Section: Introductionmentioning

confidence: 99%

Strength Characteristic of Lightweight Modular Block (LMB) Element using Stabilized Dredged Soil-EPS

et al. 2023

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For several decades, lightweight material applications have been extensively studied. Modifying various types of soil with EPS beads or lightweight geomaterials is an alternative construction material on site that can reduce excessive problems such as large deformation and lateral pressure. This study aims to examine the strength characteristics of lightweight geomaterials, namely lightweight modular block/LMB. LMB is composed of EPS beads, dredged soil, and cement. The cement amounts are 3%, 5%, 7%, and 9%, with EPS variations of 0.5% and 0.75% to the mixture weight. Laboratory tests were conducted to investigate the strength with unconfined compression and undrained direct shear tests. Before testing, the specimens were made using the one-layer static compaction method and were cured for 7, 14, and 28 days. This paper also presents explanations related to the specimens making and treatment by providing preliminary test results to compare the effectiveness of the three-layer and one-layer methods. Moreover, the curing treatments to avoid cracking were explained explicitly. The result shows linearity between both increasing the amount of cement and adding more curing time to the increase of the strength parameter. In contrast, adding more EPS decreased the strength, but adding cement helped increase the strength parameter with a remarkable value at C7% and C9%. Increasing the amount of EPS also reduced the density of the mixture by 18%–29%. Doi: 10.28991/CEJ-2023-09-03-014 Full Text: PDF

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“…Several researchers have conducted various studies to address the problem of weak sub-base. Harianto [14] investigated the performance of the sub-base layer with geogrid reinforcement and soil stabilization with additives. His research shows that adding a geogrid to the sub-base layer increases the compressive strength and CBR values, reducing lateral displacement and resistance to tensile stress due to vehicle loads.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on foam concrete as a sub-base layer of rigid pavement

Harnedi

Rahman

Maizir³

2023

IOP Conf. Ser.: Earth Environ. Sci.

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Rigid pavement consists of three main layers, the base, sub-base and subgrade. Engineers mainly prefered choosing rigid pavement for heavy load road construction because the concrete mixture in this type of pavement has advantages in terms of strength, durability and design life. However, rigid pavement also has several disadvantages: relatively high construction and maintenance costs. As time goes by, researchers have developed several modified concrete mixtures; one of them is foam concrete. Foam concrete has strength similar to concrete in general but with a lighter mass and more affordable construction cost. This study examines foam concrete’s mechanical properties and properness as a sub-base layer on a rigid pavement. The research was conducted experimentally in the lab with five different densities of foam concrete mixture. The results showed that sample with a density of 1.0 g/cm3 has passed the minimum compressive and flexural strength values at 0.896 MPa and 0.0059 MPa respectively. This also indicates that increasing the density of a foam concrete mixture may increase its compressive and flexural strength but also lose its advantage of being a lightweight material as more density means more weight. Thus, it can be concluded that using foam concrete as a sub-base layer of rigid pavement is more advantageous in implementing rigid pavement construction.

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Performance of Subbase Layer with Geogrid Reinforcement and Zeolite-Waterglass Stabilization

Cited by 15 publications

References 16 publications

Soil Mechanical Characteristics Improvement With Bacterial Biocementation Technology

Soil Mechanical Characteristics Improvement With Bacterial Biocementation Technology

Strength Characteristic of Lightweight Modular Block (LMB) Element using Stabilized Dredged Soil-EPS

Experimental study on foam concrete as a sub-base layer of rigid pavement

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