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RISS 인기검색어
- 검색키워드
- 저자 : Thanakorn Chompoorat (검색결과 2 건)
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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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