Unconfined compressive strength assessment of soil-cement mixtures in Hai Duong city

  • Affiliations:

    1 DAVICO.JSC, Hai Duong, Vietnam
    2 Hanoi University of Mining and Geology, Hanoi, Vietnam

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  • Received: 9th-Aug-2023
  • Revised: 17th-Nov-2023
  • Accepted: 28th-Nov-2023
  • Online: 1st-Dec-2023
Pages: 58 - 65
Views: 1046
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Abstract:

The unconfined compressive strength (qu) of the soil-cement mixture (S-CM) depends on many factors, in which the soil type and the cement content (%CM) are very important factors. The soil type determines the fine particle content and affects the effectiveness of soil-cement mixture. Meanwhile, %CM has a direct influence on the qu of the S-CM. The cost of foundation treatment methods for small and medium-sized constructions depends on the reasonable cement content. This paper presents the unconfined compressive strength of S-CM for five common cohesive soils in Hai Duong city (soft clay, soft clayey sand, soft sandy clay, clayey sand mud, and sandy clay mud) with four cement contents (7%, 10%, 15%, and 20%). The research results show that the clayey sand (mbQ21-2hh) has the highest improvement efficiency compared to other soils, i.e., soft sandy clay (abQ23tb), soft clay (mQ21-2hh), sandy clay mud (mbQ21-2hh), and clayey sand mud (amQ21-2hh). The clay content has a great influence on the qu of S-CM. With the required value of qu28 = (8.0÷10.0) kG/cm2 (at 28 curing days), the reasonable cement content (% CM) is varied from 8% to 13% for soft sandy clay (abQ23tb), soft clay (mQ21-2hh), sandy clay mud (mbQ21-2hh), and clayey sand mud (amQ21-2hh); with the same value of qu28, the reasonable %CM is from 7.5 to 9.0% for clayey sand (mbQ21-2hh). The results are the scientific basis for recommending a reasonable %CM for each type of soil when designing to reinforce the foundation with soil-cement columns in Hai Duong city.

How to Cite
Do, T.Hong, Nguyen, P.Van and Nguyen, H.Van 2023. Unconfined compressive strength assessment of soil-cement mixtures in Hai Duong city. Journal of Mining and Earth Sciences. 64, 6 (Dec, 2023), 58-65. DOI:https://doi.org/10.46326/JMES.2023.64(6).07.
References

Do, M. T., Do, M. N. (2018). Motorway on soft ground. Lectures for the Graduate School of Bridge and Road, University of Transport Technology, Hanoi.

Le, H. Q. (2008). Dividing the types of ground structures in Hai Duong city and proposing appropriate foundation solutions for civil and industrial constructions. Master thesis. (In Vietnamese).

Nikken Sekkei Civil Ltd (2017). The project to adjust the general planning of Hai Duong city to 2030, with a vision to 2050.

Nguyen, N. T., Bui, S. T., and Van Pham, H. (2020). Utilisation of ground granulated blast furnace slag (GGBFS) for soft soil improvement by deep mixing method. Journal of Mining and Earth Sciences Vol61(1), 92-100.

Nguyen, U. (2013). Soft ground treatment in construction. Construction Publishing House.

Pham, V. H., Nguyen, D. C., Le, H. C., Lai, D. H., Vu, Q. L., Nguyen, V. P., Mai, V. T., Nguyen, D. N. (2008). Monograph on Geology and Mineral Resources of Hai Duong Province. Hai Duong Newspaper Printing Factory, Hai Duong.

TCVN 9403: 2012 - Reinforcing soft ground - Method of soil-cement columns.

Vu, N. B. (2018). Research on the influence of construction properties of soft clay soils in the Mekong Delta on the quality of foundation reinforcement by cement combined with additives in building construction. Technical doctoral thesis. Hanoi (in Vietnamese).

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