Improvement of Gravelly Silty Sand Reinforced with Biaxial Bamboo Geogrid

2021 ◽  
Vol 1033 ◽  
pp. 183-189
Author(s):  
Alex Llauce ◽  
Gary Duran ◽  
Carlos Fernandez
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Carrying Capacity ◽  
Laboratory Tests ◽  
Bending Strength ◽  
Silty Sand ◽  
California Bearing Ratio ◽  
Sand Soil ◽  
Renewable Material ◽  
Tensile And Bending Strength

In this paper, performance of gravelly silty sand soil reinforced with geogrid are present and analyzed to improve the carrying capacity. For this, the geogrid was elaborated with a renewable material like bamboo with the same dimensions of polymer geogrids biaxial. This type of soil can be used for the construction of the sub-base and base of a pavement. California Bearing Ratio (CBR) tests was carried out to obtain the bearing capacity of the silty sand soil with and without bamboo geogrid. In addition, laboratory tests were carried out to obtain the mechanical properties of the bamboo. When comparing CBR results, an improvement in the bearing capacity was evidenced with the use of bamboo geogrid with a 20% increase in the carrying capacity. Finally, maximum tensile and bending strength of bamboo were 2000 kgf/cm2 and approximately 0.018 kgf/cm, respectively.

scholarly journals PENGARUH KEMIRINGAN FONDASI TIANG PANCANG BATTERED PILE PADA TANAH LEMPUNG DAN TANAH PASIR

2020 ◽  
Vol 3 (2) ◽  
pp. 467
Author(s):  
Swendrinata Suwardi ◽  
Andryan Suhendra
Keyword(s):  
Ground Water ◽  
Bearing Capacity ◽  
Carrying Capacity ◽  
Clay Soil ◽  
Soil Conditions ◽  
Sand Soil ◽  
Lateral Capacity ◽  
Pile Up ◽  
Calculation Results ◽  
Curve Method

The Battered Pile  is one of the foundation designs that aims to increase the lateral bearing capacity of the foundation. Battered Pile are designed with a certain slope that aims to increase the lateral capacity of the soil. The type of soil used will affect the lateral capacity of the pole. Calculation of bearing capacity of the pile is carried out on the condition of clay and sand soils at slope 00 to +200. The calculation results will then be analyzed to understand the effects that occur. The calculation results will be presented in the p-y curve method. The use of this method is expected to make it easier to understand the characteristics of Battered Pile for soil conditions. Based on the analysis it was found that an increase in the  capacity of the pile up to 23% in the slope of 100 to 150. Sand soil in conditions below the surface of the ground water will have a linear carrying capacity and have a lower deflection value when compared to clay soil at a depth of 2 meters. But at a depth of 16 meters, clay has a point where it has a lower deflection value compared to sandy soil.AbstrakTiang pancang Battered Pile merupakan salah satu rekasaya fondasi yang bertujuan untuk meningkatkan daya dukung lateral fondasi. Tiang Battered Pile dipancang dengan kemiringan tertentu yang bertujuan untuk meningkatkan daya dukung lateral tanah. Jenis tanah yang digunakan akan mempengaruhi daya dukung lateral tiang. Perhitungan daya dukung tiang dilakukan pada kondisi tanah lempung dan tanah pasir pada kemiringan 00 hingga +200. Hasil perhitungan kemudian akan dianalisis untuk memahami pengaruh yang terjadi. Hasil perhitungan akan disajikan dalam metode p-y curve. Penggunaan metode ini diharapkan dapat memudahkan dalam memahami karakteristik tiang Battered Pile terhadap kondisi tanah. Berdasarkan analisis didapatkan bahwa terjadi peningkatan daya dukung tiang hingga 23% pada kemiringan 100 hingga 150. Tanah pasir pada kondisi di bawah permukaan air tanah akan mengalami kenaikan daya dukung secara linier  dan memiliki  nilai lendutan yang lebih kecil jika dibandingkan dengan tanah lempung pada kedalaman 2 meter. Tetapi pada kedalaman 16 meter, tanah lempung memiliki titik dimana memiliki nilai lendutan yang lebih kecil jika dibandingkan dengan tanah pasir.

Effect of the Fibre Type on the Rheological and Mechanical Properties of Cementitious Composites for Thin Overlays

2018 ◽  
Vol 762 ◽  
pp. 362-367
Author(s):  
Arturs Lukasenoks ◽  
Rolands Cepuritis ◽  
Andrejs Krasnikovs
Keyword(s):  
Mechanical Properties ◽  
Rheological Properties ◽  
Bending Strength ◽  
Stability Index ◽  
Strength Loss ◽  
Cementitious Composites ◽  
Visual Stability ◽  
Single Crack ◽  
Fresh State ◽  
Tensile And Bending Strength

Polypropylene (PP), nylon and polyvinyl alcohol (PVA) micro-fibres with different geometries were used at 1 vol. % dosage to investigate rheological and mechanical properties of cementitious composites to be used for thin overlays. Slump-flow and visual stability index methods were used to characterise the rheological properties. Single crack tension and bending studies were carried out to evaluate the tensile and bending strength, as well as the post-cracking behaviour. The results show that fibre geometry (L/d ratio and specific surface area) has a pronounced influence on the fresh state rheological properties of the cementitious composites. The results also surprisingly indicated that the nylon fibres are able to significantly increase the pre-cracking tensile and bending strength. All tested composites showed tensile strain softening and insignificant deflection hardening after cracking and a major strength loss. The results indicate single crack tension method to be the most appropriate for evaluation of mechanical properties of cementitious composites used for thin overlays.

Soil Stabilization for the Building of Unpaved Runways

2013 ◽  
Vol 723 ◽  
pp. 1060-1067
Author(s):  
Antonello Germinario ◽  
Antonella Schibani
Keyword(s):  
Bearing Capacity ◽  
Calcium Oxide ◽  
Laboratory Tests ◽  
Soil Stabilization ◽  
Soil Classification ◽  
California Bearing Ratio ◽  
Average Value ◽  
Planning Phase

This paper analyzes the bearing capacity of an unpaved runway built in Grazzanise military airport. Structural issues were studied during the planning phase. After carrying out tests required for soil classification, laboratory tests were carried out on different chemical stabilizers available on the market. Four test areas were created at the airport with the aim of finding the best solution in terms of bearing capacity and costs. These analyses showed that the best solution for soil stabilization was recycled ground pozzolan and calcium oxide and tests showed that this materials have a good CBR (California Bearing Ratio) average value.

scholarly journals Analisis Daya Dukung Tanah Pondasi Dalam Berdasarkan Data Lapangan Di Desa Baringin Kota Palangka Raya

2020 ◽  
Vol 9 (1) ◽  
pp. 70-77
Author(s):  
Amanda Rachmad Pratama ◽  
Rida Respati ◽  
Norseta Ajie Saputra
Keyword(s):  
Bearing Capacity ◽  
Carrying Capacity ◽  
Pile Foundation ◽  
Laboratory Tests ◽  
Field Tests ◽  
Deep Foundation ◽  
Calculation Results ◽  
Foundation Pile

Soil bearing capacity is the ability of the soil to support the foundation load acting on it. To produce an accurate bearing capacity, it is necessary to know the properties and characteristics of the soil. For this reason, a comparison of the carrying capacity of the soil is carried out based on the calculation of CPT / Sondir and SPT to be able to plan a safe and economical pile foundation. The purpose of this study was to determine the amount of soil bearing capacity of the deep foundation in the environment around the Ataqwa Mosque, Baringin Village, Palangkaraya City based on field tests, and based on laboratory tests, and to determine the value of the comparison between the Mayerhof Method and the Schmertmann-Nottingham Method. Based on the Sondir value, it is continued with the calculation of the carrying capacity of the soil, then the calculation results are analyzed and concluded. From the calculation of the value of the carrying capacity of the foundation pile implementation of point 1 (one), the highest value of 400 mm diameter piles in the Meyerhoff method is 75,319 kg, while the lowest bearing capacity value is also at 400 mm piles of 10,676 kg. For point 2 (two), the highest value is obtained at 400 mm diameter piles in the Shmertmann-Nottingham method of 65,853 kg, while the lowest bearing capacity value is also at 400 mm piles of 10,676 kg

Safe bearing capacity evaluation of the bridge site along Syafrubesi-Rasuwagadhi road, Central Nepal

1970 ◽  
Vol 12 ◽  
pp. 95-100
Author(s):  
Suman Manandhar ◽  
Uttam Bol Shrestha ◽  
Noriyuki Yasufuku ◽  
Kiyoshi Omine ◽  
Taizo Kobayashi
Keyword(s):  
Mechanical Properties ◽  
Bearing Capacity ◽  
Laboratory Tests ◽  
Research Work ◽  
Granular Soils ◽  
Empirical Equations ◽  
Bridge Site ◽  
Central Nepal ◽  
Capacity Evaluation ◽  
Left And Right

The research work was carried out at the proposed bridge site along Syafrubesi-Rasuwagadhi Road, Central Nepal. The study was based on field SPT/DCPT and laboratory tests. N values were determined from SPT/DCPT test. The index and mechanical properties of granular soils were computed in laboratory. Then, ultimate and allowable bearing capacities with safety factor 3 for maximum tolerable limit of 40 mm settlement was estimated by empirical equations provided by Teng (1988) and Terzaghi and Peck (1978). It is recommended that safe bearing capacity for 6 m size open square foundation at left and right abutments are suitable within 4.5 to 6 m depth.   doi: 10.3126/bdg.v12i0.2254 Bulletin of the Department of Geology, Vol. 12, 2009, pp. 95-100

Mechanical Properties of Hemp-Reinforced Biomimicked Composites

2010 ◽  
Author(s):  
Martin Summe ◽  
Seyed Allameh
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Tensile Strength ◽  
Structural Material ◽  
Mechanical Testing ◽  
Bending Strength ◽  
Tensile And Bending Strength

Hemp-reinforced biomimicked composites (HRBC) were fabricated and tested under various mechanical testing configurations. The results were compared with the results of similar composites made with and without fiberglass reinforcement. In general, hemp reinforcement increases the tensile and bending strength of the composites. The tensile strength of the HRBC is greater than non-reinforced biomimicked composite (BC). However, this value is smaller than the tensile strength of fiberglass reinforced biomimicked composite (FRBC). The fracture toughness of HRBC was found to be close to that of FRBC, nearly seven times that of monolithic structural material.

scholarly journals A 95-Year-Old Concrete Arch Bridge: From Materials Characterization to Structural Analysis

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1744
Author(s):  
Andrzej Ambroziak ◽  
Maciej Malinowski
Keyword(s):  
Mechanical Properties ◽  
Structural Analysis ◽  
Numerical Modelling ◽  
Bearing Capacity ◽  
Laboratory Tests ◽  
Economic Benefits ◽  
Materials Characterization ◽  
Arch Bridge ◽  
Traffic Loads ◽  
Existing Structure

The structural analysis of a 95-year-old concrete arch bridge located in Jagodnik (Poland) is performed in this paper, in order to check its behavior under today’s traffic loads. The mechanical properties of both the concrete and the reinforcement are investigated by testing cores and bar stubs extracted from the bridge. Structural analysis confirms that the bridge meets today’s load requirements in terms of bearing capacity, serviceability state, and that the adopted structural improvements (a new deck slab on top of the existing structure and a layer of mortar to protect the surface of the old concrete) are effective. In this way, the 95-year-old arch bridge was given a new life. The structural improvements show how combining numerical modelling and laboratory tests can contribute to the preservation of an old—though fairly simple—and valuable structure, otherwise destined to demolition, with both environmental and economic benefits.

scholarly journals Physico-mechanical and joint performance of bamboo veneer products manufactured by mould pressing

BioResources ◽  
2019 ◽  
Vol 14 (2) ◽  
pp. 3823-3832
Author(s):  
Wenfu Zhang ◽  
Shaohua Gu ◽  
Cuicui Wang ◽  
Haitao Cheng ◽  
Ge Wang
Keyword(s):  
Mechanical Properties ◽  
Compression Strength ◽  
Dimensional Stability ◽  
Carrying Capacity ◽  
Bending Strength ◽  
Internal Bonding ◽  
Application Performance ◽  
Bending Modulus ◽  
Overall Bending ◽  
Comprehensive Property

Bamboo can be processed into engineering materials with excellent properties by reasonable processing methods. In this study, the performance of mould-pressed bamboo (MBP) veneer products was examined. The physical mechanical properties and connection properties of MPB were tested, and the application performance of the MPB was analyzed. The results show that MPB has a comprehensive property of high internal bonding and good dimensional stability, and its density and mechanical properties are similar to those of wood dimensional stock. The overall bending strength, bending modulus, and compression strength of MPB were 29.0 MPa, 6.83 GPa, and 15.6 MPa, respectively. While the overall carrying capacity was relatively low, the connection performance of BPM was good. Thus, it can be used as a connector or substructure.

Study on Mechanical Properties of GF/PVC with CPE and ACR

2013 ◽  
Vol 788 ◽  
pp. 81-84 ◽  
Author(s):  
Sha Sha Wang ◽  
Ke Juan Chen
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Glass Fiber ◽  
Bending Strength ◽  
Breaking Elongation ◽  
Tensile And Bending Strength ◽  
The Impact

Reinforce the strength of PVC by adding glass fiber, study the mechanical properties of PVC on different contents of glass fiber. With the increasing contents of glass fiber, the tensile and bending strength, impact strength are increased, but the breaking elongation is decreased. In order to further improve the toughness of PVC, do research on how to toughen the GF/PVC alloy, study the influence of CPE and ACR on GF/PVC. Use the method of blending modification of glass fiber, PVC and modifiers, significantly increase the impact strength and breaking elongation while maintaining the strength. Compare the influence of CPE and ACR on GF/PVC properties, make excellent strengthened PVC material.

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