Research on Static Triaxial Mechanical Properties of New CementSoil Reinforced with Polypropylene Fiber

Wang, Qiang; Tang, Rui; Cheng, Qun Lin; Wang, Xiankun; Liu, Fang-ling

doi:10.1155/2014/532327

Cited by 11 publications

(7 citation statements)

References 18 publications

(20 reference statements)

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“…Lately, there has been increased research interest in soil matrices reinforced with natural fibres, due to the fact that they are renewable, biodegradable, environmentally friendly and low-cost. It has been demonstrated that fibres can be considered as good earth reinforcement material 46 . A number of studies also showed improvement in properties of fibre reinforced soil blocks over the unreinforced blocks 1-3, 5, 10, 11, 14, 15, 22-24, 28-31, 36, 39, 43 .…”

Section: Introductionmentioning

confidence: 99%

Mechanisms by which the inclusion of natural fibres enhance the properties of soil blocks for construction

Danso

Martinson

Ali

et al. 2017

Journal of Composite Materials

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Soil blocks are widely used for construction, especially in less economically developed countries. Addition of agricultural waste fibres has been shown to improve the properties of these blocks, however unlike most composites the fibres are not bound to the soil matrix. Therefore the reinforcement mechanisms are different and not well characterised. This paper investigates these mechanisms through a series of experimental studies to inform the development of better guidance for practitioners, and hence improve housing for low-income communities. The microstructural characteristics were investigated using SEM, CT scan, optical microscope analysis and pull out testing. It was established that fibres in the soil matrix are randomly distributed with gaps between the fibres and soil matrix due to fibre shrinkage during drying of the blocks. It was also found that natural fibres in soil matrix can either be pulled-out or rupture under load depending on the depth of fibres embedment in the soil matrix.

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Section: Introductionmentioning

confidence: 99%

Mechanisms by which the inclusion of natural fibres enhance the properties of soil blocks for construction

Danso

Martinson

Ali

et al. 2017

Journal of Composite Materials

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“…These results indicate the suitability of soil types for only one technique of earth construction. There were a number of soil samples in previous studies that could be recommended for two techniques of earth construction, such as soil samples used in studies [6,7,19,33,38,39,45,46,54,[71][72][73][74][75][76][77]. Other soil samples from the previous studies could be recommended to be used for three techniques of earth construction [44,45,49,51,58,59,63,73].…”

Section: Atterberg Limitsmentioning

confidence: 99%

Suitability of Soil for Earth Construction as Building Material

Danso¹

2018

ACET

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In order to check the suitability of soil to be used as construction material for earth construction, its geotechnical properties are required to be assessed. The purpose of this study is to review previously published studies soil samples and compare them with soil suitability criteria and for selecting suitable soil for earth construction. The geotechnical properties of soil samples used in previous studies were compiled and compared with various requirements to ascertain their suitability for construction purposes. Eighty-nine ( 89) studies in all were consulted and useful data were found in fifty-two (52) of them. Five geotechnical properties of soil were compiled and analysed. These properties are particle size distribution, Atterberg limits, specific gravity, maximum dry density and optimum moisture content. Based on the values of soil properties found in literature, recommendations were made for the suitability of different soil samples for three main techniques (adobe, rammed earth and compressed earth blocks) application in earth construction, while other soil samples were found to be outside the recommendations. It was found that some of the earth construction techniques which were adopted in the previous studies are different from the recommended techniques. It was also observed that some of the soil samples found to be suitable for a particular property test were unsuitable for the other property tests. The study concludes that determining the suitability of the soil for earth construction is important and any soil that is found unsuitable should be enhanced with stabilisers before use.

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“…As Tang et al [7] reported, the inclusion of polypropylene fiber into cement soil can not only enhance the compressive strength of cement soil but also improve the toughness of cement soil. Besides, Wang et al [8] also found that the polypropylene fiber-reinforced cement soil has a significant increase in strength compared with the cement soil without polypropylene fiber. At the same time, it is observed that the stress-strain curve of polypropylene fiber-reinforced cement soil has typical strain hardening characteristics and the principal stress difference increases with increase in fiber content [8].…”

Section: Introductionmentioning

confidence: 99%

“…Besides, Wang et al [8] also found that the polypropylene fiber-reinforced cement soil has a significant increase in strength compared with the cement soil without polypropylene fiber. At the same time, it is observed that the stress-strain curve of polypropylene fiber-reinforced cement soil has typical strain hardening characteristics and the principal stress difference increases with increase in fiber content [8]. What's more, the proper dosage of polypropylene fiber is helpful to enhance the compressive strength of cement soil after freezing-thawing cycles.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

Pang

Huang

2019

Advances in Materials Science and Engineering

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This paper aims to study the dynamic mechanical properties, failure patterns, fractal behaviors, and energy dissipation of polypropylene fiber-reinforced cement soil under impact loading. Dynamic compression tests for reinforced cement soil with different polypropylene fiber contents of 0%, 0.4%, 0.8%, and 1.2% were conducted using a 50 mm diameter split Hopkinson pressure bar (SHPB) device. The static and dynamic stress-strain curves, dynamic strength increase factor (DIF), fractal behaviors, and energy dissipation properties of polypropylene fiber-reinforced cement soil were investigated and analyzed. The experimental results indicated that the dynamic strength increase factor (DIF) of cement soil increases firstly and then decreases with the increase of polypropylene fiber content from 0% to 1.2%. The maximum dynamic compressive strength of cement soil was obtained with adding 0.8% polypropylene fiber. With the increase of polypropylene fiber content, the average particle size of cement soil fragments has an increasing trend, whereas the fractal dimension presents a decreasing trend. Besides, the fragmentation degree of cement soil decreases correspondingly with the increase of polypropylene fiber content. The fractal dimension value has a linear relationship with the polypropylene fiber content and a decreasing exponential relationship with the average particle size. The absorbed energy per unit volume of cement soil presents an increasing trend firstly and a decreasing trend subsequently as the polypropylene fiber content increases from 0% to 1.2%. When the fractal dimension of cement soil is kept in the range of 2.04 to 2.15, the absorbed energy per unit volume of cement soil increases first and then decreases. The absorbed energy per unit volume of cement soil has a quadratic parabola relationship with polypropylene fiber content and fractal dimension, respectively. At last, the relationship of the absorbed energy per unit volume, fractal dimension, and polypropylene fiber content can be established, which can be used in the studies of dynamic behaviors and fractal properties of the fiber-reinforced cement soil under impact loading.

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Research on Static Triaxial Mechanical Properties of New CementSoil Reinforced with Polypropylene Fiber

Cited by 11 publications

References 18 publications

Mechanisms by which the inclusion of natural fibres enhance the properties of soil blocks for construction

Mechanisms by which the inclusion of natural fibres enhance the properties of soil blocks for construction

Suitability of Soil for Earth Construction as Building Material

Dynamic Mechanical Properties and Fractal Characteristics of Polypropylene Fiber-Reinforced Cement Soil under Impact Loading

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