Performance of Polypropylene Fiber‐Reinforced Solidified Soil

Cheng, Honghui; Weng, Xingzhong; Tong, Baohong; Jiang, Le; Liu, Junzhong; Li, Wenlei

doi:10.1155/2021/8859358

Cited by 5 publications

(3 citation statements)

References 31 publications

(33 reference statements)

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“…RE a brittle material having low flexural strength and poor damage resistance when compared to contemporary building materials, requires improvement in the engineering properties. All types of soils have poor resistance to tensile stresses; hence, reinforcing them with discrete fibres has shown a very impressive improvement in the behaviour of soils (Li et al 2014;Hu et al 2021;Wang and Hu 2019;Jiang, Cai, and Liu 2010). While stabilizers like cement can help achieve durability and strength enhancement properties, fibres can provide ductility by improving their tensile and flexural strength.…”

Section: Introductionmentioning

confidence: 99%

Cement–nanosilica stabilized fibre-reinforced rammed earth: compressive and flexure behaviour

Neha Vivek,

Prasanna Kumar,

Reddy

2024

Asian J Civ Eng

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Rammed earth (RE) is a brittle material that can undergo sudden catastrophic failures under ultimate stress. Such sudden catastrophic failures can be avoided in RE structures with the addition of randomly oriented polypropylene fibres where crack propagation can be inhibited.Further, the strength of RE can be enhanced by the addition of nanomaterials, which make RE denser because of their high specific surface area. This research deals with studies on the effect of polypropylene fibre and nanosilica on the behaviour of cement stabilized rammed earth (CRE) under compression and flexure. The effect of fibre volume fraction and nanosilica content on the strength and stress-strain characteristics has been evaluated. Three polypropylene fibre volume fractions (0.2%, 0.3% and 0.4%) and five nanosilica contents (0.2%, 0.4%, 0.6%, 0.8% and 1%) were considered in this investigation. The compressive strength of fibre reinforced CRE increased by 30% for 0.3% of polypropylene fibre content and by 41% for 0.6% of nanosilica content when compared to CRE. The strain at peak stress has significantly increased with the addition of fibres indicating improved ductility and postpeak response of the material. The microscopic analysis showed that the addition of nanosilica has contributed to a denser packing of soil particles and hence, might have increased the compressive strength.

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Section: Introductionmentioning

confidence: 99%

Cement–nanosilica stabilized fibre-reinforced rammed earth: compressive and flexure behaviour

Neha Vivek,

Prasanna Kumar,

Reddy

2024

Asian J Civ Eng

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“…The test results showed that the soil particles were tightly bound under 3.5% content of SH polymer, and the impact resistance of the specimens reached the maximum when the glass fiber content was 3.0%. Hu [ 25 ] investigated the reinforcement mechanism of polypropylene (PP) fiber-reinforced consolidated soil and discussed the effect of fiber parameters on the mechanical properties of consolidated soil. It was finally concluded that PP fibers with a length of 12 mm and a fiber content of 0.3% have the best performance and economic cost.…”

Section: Introductionmentioning

confidence: 99%

Study on Mechanical Properties of Permeable Polymer Treated Loess

et al. 2022

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The reinforcement and durability of loess are of great importance for road performance. In this study, a self-designed grouting system and newly permeable polymers were adopted to investigate the mechanical properties and durability of solidified loess (SL), considering different dry densities and water contents. The unconfined compression test and piezocone penetration (CPTU) test were used to examine the mechanical properties. The mechanism of the loess solidified by permeable polymer was analyzed from the micro-level by SEM, MIP, and XRD tests. The test results show that the effect of polymer grouting is obvious, the unconfined compressive strength (UCS) of the SL after grouting is as high as 3.05–5.42 MPa; it is 11.83–20.99 times that of unsolidified loess (UL). The UCS of the SL after grouting is inversely proportional to the dry densities and water contents. After 56 days of immersion, the SL still shows a high compressive strength. The additional erosion of the SL was not caused by the salt solution; the durability is significantly better than that of cement mixing soil. The sensitivity of various factors on the UCS of the SL are service environment > water content > dry density. The SEM tests clearly show that the gel formed by the reaction of the polymer with water on the surface of soil particles makes the bond of soil particles tighter. It can be observed from the MIP test that the cumulative mercury of SL was 0.115 mL/g, which was 33.72% of UL (0.341 mL/g), and the cumulative mercury of SL after immersion in water and salt solutions was 0.183 mL/g and 0.175 mL/g, which was 53.7% and 51.3% of UL (0.341 mL/g), respectively. The XRD results show that there are no other new mineral components produced after grouting and the spacing between crystalline planes decreases, which proves that permeable polymer grouting makes the soil denser and does not erode the soil particles.

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“…During the hydration process, calcium aluminate hydrate (C-A-H) and calcium silicate hydrate gel (C-S-H) were produced, which improved soil conditions [9,10]. However, traditional OPC curing agents have problems such as limited mechanical strength, poor durability, poor volume stability, high pollution in the production process, and high CO 2 emissions [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Study on Properties of Magnesium Oxychloride Cement Solidified Soil

Wang

Zhang²,

Yan

et al. 2022

Advances in Materials Science and Engineering

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Due to the poor performance of ordinary Portland cement (OPC) as a solidified soil road and the large pollution in the production process, environment-friendly magnesium oxychloride cement (MOC) was used as the soil curing agent to prepare the solidified soil, exploring the optimal ratio of various raw materials when MOC is used as a curing agent. Analyzing the properties of MOC solidified soil in the application of road subgrade. This paper tests compaction, mechanical properties, and durability of the MOC solidified soil, simulates the development trend of 7 days unconfined compressive strength of MOC solidified soil, and then analyzes the hydration process and strengthens the formation mechanism of MOC in solidified soil. The study found that the addition of MOC as a curing agent to the soil can effectively improve the compaction and mechanical properties of the soil. Matlab simulation found that when the MgO content is 5.5% to 6% and the ratio of raw materials MgO, MgCl2, and H2O is 2.45 : 1 : 14 to 6.3 : 1 : 14, the performance of MOC solidified soil is excellent. Fitting UCS data, it is found that MOC solidified soil has early strength characteristics. The excellent compaction and mechanical properties of MOC solidified soil are due to the formation of a small amount of phase 5 and layered Mg(OH)2 by the hydration of MOC, and the formation of amorphous gel with SiO2 in the soil. This reaction improves soil compaction and reduces internal porosity from a microscopic perspective. The strength loss rate of MOC solidified soil is higher after immersion in water at the initial stage of curing, but it is still better than that of traditional cement-based solidified soil. Poor performance after immersion in water is associated with disruption of the network-like structure. As an environment-friendly soil curing agent, MOC can be used in engineering practice with low environmental humidity.

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Performance of Polypropylene Fiber‐Reinforced Solidified Soil

Cited by 5 publications

References 31 publications

Cement–nanosilica stabilized fibre-reinforced rammed earth: compressive and flexure behaviour

Cement–nanosilica stabilized fibre-reinforced rammed earth: compressive and flexure behaviour

Study on Mechanical Properties of Permeable Polymer Treated Loess

Study on Properties of Magnesium Oxychloride Cement Solidified Soil

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