Preliminary results of dry Deep Soil Mixing soil-cement composite testing

Jendrysik, Klaudia; Kiecana, Monika; Szabowicz, Hubert

doi:10.1051/matecconf/201825101025

Cited by 7 publications

(8 citation statements)

References 10 publications

(7 reference statements)

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“…The method of analyzing data obtained from the tests was based on the method presented by Kanty [12] and data presented in the studies [13][14][15][16] were analyzed in a similar manner. The methodology of analysis is analogical to the concrete tests, while the difference consists of the fact that in the graphs of deformation stresses, the first part of the graph is not taken into account, because it is unreliable due to the press adaption to the uneven surface of the sample.…”

Section: Analysis Of Strength Test Resultsmentioning

confidence: 99%

“…The soil, which mostly consisted of peat with admixtures of clays, was delivered from the construction site, where the mass stabilisation was supposed to be implemented. These tests have also been presented in the works [13,14], where the focus was on determining the optimal time for quality control of the material, as well as demonstrating the changes in strength parameters depending on the time and amount of used cement. Another work focusing on the aspect of dependence of the strength increase along with the increase in the amount of cement in the material is [15].…”

Section: Tests Of Soil-cement Materials Samplesmentioning

confidence: 99%

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Mass Stabilization as reinforcement of organic soils

Nowak

Kanty

2019

E3S Web Conf.

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The decreasing number of places suitable for constructing buildings forces people to creatively develop newer methods of soil reinforcement. One of these methods is the deep soil mixing. This technology has been firstly developed and applied in Japan in the 1970s. Initially, it was used to create DSM (Deep Soil Mixing) columns. In the subsequent years, it was also developed in Scandinavia. Over time, the deep mixing technology was modified and developed, and in addition to the wet method, also the dry method was started to be used, while in addition to the cement binder, also lime binders and fly ashes were used. Technologies consisting of the deep mixing of cement with soil are very popular due to the wide range of applications and relatively low implementation costs. The method of Mass Stabilization (MS) is a soil reinforcement method that is analogical to DSM and it consists of mixing large volumes of soil with cement. This article describes the method of dry Mass Stabilization of organic soils. It cites the analyzed laboratory tests of soil-cement material manufactured in MS technology. The tests included the creation of 140 material samples, and subsequently the performance of compression strength test on them, along with the registration of stress path. The main aspect of these tests consisted of increase in the primary deformation modulus over time, depending on the amount of applied cement. Also, an example of the project to strengthen the layer of aggregate mud under the floor in the hall is demonstrated. The reinforcement was implemented in the MS technology.

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Section: Analysis Of Strength Test Resultsmentioning

confidence: 99%

Section: Tests Of Soil-cement Materials Samplesmentioning

confidence: 99%

Mass Stabilization as reinforcement of organic soils

Nowak

Kanty

2019

E3S Web Conf.

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“…All components are to be mechanically mixed to ensure a clear and uniform structure of final soil-cement material. According to former experience [6,7], the mixing process should take roughly from five up to ten minutes.…”

Section: Succession Of Soil and Soil-cement Composite Testing Proceduresmentioning

confidence: 99%

“…Various technologies of Deep Soil Mixing are implemented mainly in the foundation of bridges and other engineering structures [1][2][3]. Dry soil mixing can be used in soft soils of high moisture [4][5][6][7]. The typical DSM equipment consists of a binder injectors and a drilling machine, which are adopted to work in adverse soil conditions.…”

Section: Introductionsome Remarks On Deep Soil Mixing (Dsm)mentioning

confidence: 99%

Some remarks on statistic approach to strength testing of soil-cement composites

2019

Self Cite

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Results of laboratory testing of organic soil-cement samples are presented in the paper. The research program continues on the authors previously reported experiences with cement - organic soil sample testing. Over 150 compression tests have been carried out altogether. Several samples were cured for over 3 months before they were tested. Several factors, such as: the large amount of the pieces under test, long observation time, carrying out the tests in complex cycles of loading and the possibility of continuous registering the loads and deformation in the axial direction – made it possible to control numerous interdependencies, some of which have been presented in this work. Compressive strength and elastic modulus of cubic samples were examined. Samples were mixed and stored in laboratory conditions. The results clearly point to the fact that designing the DSM dry columns in the organic soil may be linked with a considerable risk and needs special precautions. During in situ mixing, the organic material surrounded by sand layers surely mixes with one another in certain areas. However, it has not been examined and it is difficult to assume such mixing already at the designing stage.

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“…The examples of such technological design procedures were provided in the works conducted within the research program at the Wrocł aw University of Science and Technology. The tests were conducted for two various technologies: wet mixing with the use of cement binder [3] and ashes [4], as well as dry mixing [5,6]. The results obtained in the cited works cannot be directly compared due to the fact that different soil and binder were used.…”

Section: Introductionscope Of the Workmentioning

confidence: 99%

Parameters of the constitutive model of geomaterials formed with the use of DSM dry technology

2019

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Numerical modelling of geomaterials is always complex due to the variability of parameters within the soil massif (created in the natural geological processes) and the orthotropy caused by this. In the case of the soil substrate modification with the use of hydraulic binders, this issue is complicated even more due to the fact the degree of mixing can be differentiated for various areas, while in the dry mixing technology, it is additionally differentiated with the depth of consolidation stress. Additional factor that makes it difficult to predict the behaviour of stabilised soil is the possible content of organic parts. Due to the development of substrate reinforcement technology, as well as the growing market for such works, a need emerged to provide parameters of the numerical model for various materials or, at least, to provide a method for reverse analysis on the basis of available data. This paper presents an example of calibration of the selected numerical model (through parameter selection of this model) based on the conducted examinations of cubic sample in the conditions of uniaxial compression. The results of laboratory tests, reverse analysis in the numerical model with a pre-selected strength hypothesis and finally, the recommendations for selection of the model in calculations of real structure on a reinforced substrate, are demonstrated.

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Preliminary results of dry Deep Soil Mixing soil-cement composite testing

Cited by 7 publications

References 10 publications

Mass Stabilization as reinforcement of organic soils

Mass Stabilization as reinforcement of organic soils

Some remarks on statistic approach to strength testing of soil-cement composites

Parameters of the constitutive model of geomaterials formed with the use of DSM dry technology

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