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RISS 인기검색어
- 검색키워드
- 저자 : Likitlersuang, Suched (검색결과 5 건)
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Geotechnical parameters from pressuremeter tests for MRT Blue Line extension in Bangkok
Likitlersuang, Suched,Surarak, Chanaton,Wanatowski, Dariusz,Oh, Erwin,Balasubramaniam, Arumugam Techno-Press 2013 Geomechanics & engineering Vol.5 No.2
Construction of the extension project of the Bangkok MRT Blue Line underground railway was recently started in 2011. The construction of approximately 5 km long underground tunnel and 4 deep excavations of underground station are considered to be the most important geotechnical works. The pressuremeter was selected as a high-quality in situ testing of the soil to evaluate design parameters for the project. In addition, other field and laboratory tests such as vane shear and $CK_0U$ triaxial tests were included in the investigation programme. This paper aims to present the ground conditions encountered along the MRT Blue Line extension project as well as the site investigation and interpretation techniques with particular focus on the pressuremeter tests. The results are also compared with the pressuremeter investigation from the previous Bangkok MRT project.
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The Performance of Controlled Low-strength Material Base Supporting a High-volume Asphalt Pavement
Thanakorn Chompoorat,Suched Likitlersuang,Pitcha Jongvivatsakul 대한토목학회 2018 KSCE JOURNAL OF CIVIL ENGINEERING Vol.22 No.6
A lack of proper base and subbase materials in pavement construction is one of the common problems in the tropical regionworldwide. In many countries such as Thailand, cementitious materials are usually used for ground improvement. Controlled LowstrengthMaterial (CLSM) was considered in this study as a pavement base material. The CLSM mixes were prepared by varyingcement, fly ash and fine aggregate content. Each mixed component was studied for their physical and chemical properties. Aftermixing, properties of the CLSM were investigated based on the standard testing of fresh concrete and cement-treated base material. The flowability, setting time and bleeding were checked to ensure that the CLSM were self-compacting. The mechanical propertiesof hardened CLSM were determined by means of CBR, unconfined compressive strength and resilient modulus tests. The resilientmodulus results were used in the analytical design of flexible pavement with CLSM base. The critical traffic data under high-volumeroad collected by the Thailand Department of Highway was adopted in this study. Results show that the CLSM base considerablyincreased the performance as well as design life of asphalt pavement compared with the conventional crush rock base pavement.
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Influence of Asphalt Binder on Time-temperature Shift Function for Asphalt Concrete at Large Strains
Thanakorn Chompoorat,Suched Likitlersuang 대한토목학회 2016 KSCE JOURNAL OF CIVIL ENGINEERING Vol.20 No.7
This paper presents a study of the time-temperature superposition principle for asphalt concrete. The idea behind the timetemperature superposition principle is to allow the construction of master curves representing the material viscoelastic behaviour at a given reference temperature in a range of reduced loading times which is wider than that tested in the laboratory. In addition, the asphalt concrete stiffness is in fact assumed to be a function of temperature and time. A penetration number is an empirical parameter and it could be linked to the viscosity of asphalt. This research has been extended upon previous studies on the viscoelastic behavior of asphalt concrete made from different penetration gradation of asphalt binder. The total 96 experiments were run through the unconfined compression and indirect tensile tests under various temperatures and different strain rates. The results obtained from both unconfined compression and indirect tensile tests can be used to construct the stress-reduced time master curve and timetemperature shift function for each asphalt concrete. The analysis results show that the time-temperature shift function can be simplified as a single function for both compressive and tensile modes at large stains and it can also be employed for multiple penetration-graded asphalts.
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Undrained strength-deformation characteristics of Bangkok Clay under general stress condition
Yimsiri, Siam,Ratananikom, Wanwarang,Fukuda, Fumihiko,Likitlersuang, Suched Techno-Press 2013 Geomechanics & engineering Vol.5 No.5
This paper presents an experimental study on the influence of principal stress direction and magnitude of intermediate principal stress on the undrained stress-strain-strength behaviors of Bangkok Clay. The results of torsional shear hollow cylinder and advanced triaxial tests with various principal stress directions and magnitudes of intermediate principal stress on undisturbed Bangkok Clay specimens are presented. The analysis of testing results include: (i) stress-strain and pore pressure behaviors, (ii) stiffness characteristics, and (iii) strength characteristics. The results assert clear evidences of anisotropic characteristics of Bangkok Clay at pre-failure and failure conditions. The magnitude of intermediate principal stress for plane-strain condition is also investigated. Both failure surface and plastic potential in deviatoric plane of Bangkok Clay are demonstrated to be isotropic and of circular shape which implies an associated flow rule. It is also observed that the shape of failure surface in deviatoric plane changes its size, while retaining its circular shape, with the change in direction of major principal stress. Concerning the behavior of Bangkok Clay found from this study, the discussions on the effects of employed constitutive modeling approach on the resulting numerical analysis are made.
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Effect of hybrid polypropylene-steel fibres on strength characteristics of UHPFRC
Nuaklong, Peem,Chittanurak, Jithaporn,Jongvivatsakul, Pitcha,Pansuk, Withit,Lenwari, Akhrawat,Likitlersuang, Suched Techno-Press 2020 Advances in concrete construction Vol.10 No.1
This study intends to produce an ultra-high performance fibre reinforced concrete (UHPFRC) made with hybrid fibres (i.e., steel and polypropylene). Compressive and tensile strength characteristics of the hybrid fibres UHPFRC are considered. A total of 14 fibre-reinforced composites (FRCs) with different fibre contents or types of fibres were prepared and tested in order to determine a suitable hybrid fibre combination. The compressive and tensile strengths of each concrete at 7 days were determined. The results showed that a hybrid mix of micro-polypropylene and steel fibres exhibited good compromising performances and is the ideal reinforcement mixture in a strong, cost-effective UHPFRC. In addition, maximum compressive strength of 167 MPa was achieved for UHPFRC using 1.5% steel fibres blended with 0.5% macro-polypropylene fibres.
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