Application Research of New Cementitious Composite Materials in Saline Soil Subgrade Aseismic Strengthening

Huang, Shuai; Lyu, Yeoung-Su; Peng, Yanju

doi:10.1155/2020/7525692

Cited by 5 publications

(5 citation statements)

References 4 publications

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“…Rumiyanti et al [16] found the percentage addition of Lahat fly ash optimum at 14%, clinker at 62%, 3% gypsum, 18% limestone, and 3% pozzolans in the manufacture of PCC. A specifically formulated PCC can also contribute to remediating a saline soil subgrade [17]. Bukit Rawi, Central Kahayan District, Central Kalimantan Province, is one place that suffers from soil concerns due to complicated circumstances.…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Soft Clay from Bukit Rawi using Portland Composite Cement

Arifin

Rahmah

2022

IOP Conf. Ser.: Earth Environ. Sci.

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One method for stabilizing soft clay is to mix it with cement. Portland composite cement (PCC) is a cement produced by grinding together portland slag and gypsum with one or more inorganic materials that is suitable for stabilization of soft soils. The purpose of this study was to mix soft clay from Bukit Rawi, Central Kalimantan with PCC, which was then tested for unconfined compression strength (UCS) and the California Bearing Ratio (CBR) to see if it could be used as a road subgrade. Soft soil from Bukit Rawi was mixed with PCC with percentages of 6%, 8%, 10%, and 12% on a dry weight basis. The mixture was tested by Proctor standard compaction to obtain the optimum moisture content and maximum dry density. At these optimum conditions, UCS and CBR tests were carried out. The findings reveal that adding PCC to Bukit Rawi soil enhances UCS and CBR, which were previously 3.47% of CBR and 0.67kg/cm2 of UCS. The addition of PCC with a level of 2‒3% is planned for field application, because it is considered capable of fulfilling the requirements as a subgrade layer with a CBR of 15%. Furthermore, 12 percent PCC is required in the combination as a foundation (minimum 20kg/cm2 of UCS).

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Section: Introductionmentioning

confidence: 99%

Stabilization of Soft Clay from Bukit Rawi using Portland Composite Cement

Arifin

Rahmah

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…However, they also have certain disadvantages. For example, lime has a poor water stability; solidified soil made from fly ash shows low mechanical strength; cement-based solidified soil using costs much higher [15]. From the perspective of resource-saving and environmental protection, the application of solid waste in industrial cementitious materials has been attracting the attentions of worldwide researchers.…”

Section: Introductionmentioning

confidence: 99%

Development and Application of a High-Volume Recycled Powder Solidifying Material for Waterworks Sludge

Deng¹,

Hua²,

Xia³

et al. 2022

Journal of Renewable Materials

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Recycled powder (RP) is produced as a by-product during the process of recycling construction and demolition (C&D) wastes, presenting a low additional value. Using RP-based solidifying material can not only improve its utilization efficiency, but also reduce the cost of commercial solidifying materials. To date, this is the best solidifying material utilized to dispose the original waterworks sludge (OWS) with high moisture contents (60%), and the product could be used to fabricate non-fired bricks. This has become a new environment-friendly technology of "using waste to treat waste". In this paper, the influence of different particle sizes and dosages of RP on the prepared solidifying material was studied. Besides, unconfined compression strength (UCS), volume stability, chemical composition, and heat of hydration, pore structure of the solidifying material were characterized. Then, non-fired bricks were prepared by using the solidifying material, recycled aggregate, and original waterworks sludge. The UCS and softing coefficient (SC) of the non-fired bricks were evaluated. As a result, the 28-day UCS of the solidifying material with optimal (M30) was 35.40 MPa, which could reach 84.37% of Portland cement (PC). The addition of RP increased the volume stability of the solidifying material. The addition of a large amount of RP reduced the heat flux and cumulative heat release of the solidifying material, while its porosity increased. The UCS of non-fired brick (NF20) in 28 days was 15.19 MPa and the SC after 28 days was 78.35%. In conclusion, the preparation of solidifying material using RP could be a promising approach and has a great potential in disposal of original waterworks sludge.

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“…Zhu [6] et al analyzed the bearing capacity characteristics of the coral sand foundation through field tests and pointed out that the deformation modulus of the foundation soil is positively correlated with the blow count N10 of the light dynamic penetration test. The test results of Wang [7] et al showed that the bearing capacity and deformation modulus of artificially filled coral soil foundations were significantly higher than those of naturally formed reef flat facies and sandbank foundations and that the resilient modulus of coral soil increased with the increase of the degree of compaction; Yang et al [8] using the least square method proved the correlativity between the eigenvalue of foundation bearing capacity and the blow count N of standard penetration test (SPT) and the blow count N63.5 of heavy dynamic penetration test with modified eigenvalue of foundation bearing capacity; Li et al [9] conducted a plate loading model test study on coral sand foundation and found that the settlement of coral sand was 50 % to 67 % of the value calculated with the empirical equation. Huang et al [10] pointed out that the effective overlaying stress increases with the increasing of the buried depth of the soil layer and groundwater level.…”

Section: Introductionmentioning

confidence: 99%

Research on improvement of Terzaghi’s bearing capacity equation for coral sand foundation

Li¹,

Tao²,

Huang³

et al. 2022

J. vibroeng.

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The mechanical characteristics of coral reef sandy soil is significantly different from the sand and clay soils. Currently, Terzaghi's bearing capacity equation is still commonly applied to evaluate the bearing capacity of coral reef, while the calculation result is not consistent with the actual condition. Based on a port project in east Africa, plate loading test of the coral reef sandy soil has been conducted and the P-S curves are obtained, and the bearing capacity values obtained from the plate loading test results are compared with the calculated results based on the Terzaghi's bearing capacity equation. According to multiple linear regression and the optimal regression equation selected by the significance test, the modified Terzaghi foundation equation of bearing capacity in coral reef sandy soil area is proposed, and the modified Terzaghi foundation equation has important reference value for the calculating of the bearing capacity of the coral reef sandy soil foundations.

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Application Research of New Cementitious Composite Materials in Saline Soil Subgrade Aseismic Strengthening

Cited by 5 publications

References 4 publications

Stabilization of Soft Clay from Bukit Rawi using Portland Composite Cement

Stabilization of Soft Clay from Bukit Rawi using Portland Composite Cement

Development and Application of a High-Volume Recycled Powder Solidifying Material for Waterworks Sludge

Research on improvement of Terzaghi’s bearing capacity equation for coral sand foundation

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