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Full-Text Articles in Engineering
Assessment Of Asphalt Concrete Pavement Quality By Using Infrared Thermal Imaging Technology, Lisa Y. Chen, Mei-Yun Wang, Chien-Chiao Chao, Wei Lo
Assessment Of Asphalt Concrete Pavement Quality By Using Infrared Thermal Imaging Technology, Lisa Y. Chen, Mei-Yun Wang, Chien-Chiao Chao, Wei Lo
Journal of Marine Science and Technology
Manholes cause uneven pavements, which affect the quality of pavement services, leading to public criticism in Taiwan. Many manholes are buried beneath pavements to ensure evenness and enhance the usability of pavements for pedestrians. The presence of manholes affects the quality of the asphalt concrete underneath the pavement because then conducting excavations using road construction equipment becomes difficult, ultimately leading to early deterioration of the pavement surfaces. Temperatures can also differ considerably between the manhole and non-manhole locations on asphalt concrete pavement. This study used infrared thermal imaging technology and an analysis of variances statistical method to investigate the differences …
The Study Of Chloride Ion Transport Behavior Of Mortar Under Different Storing Environment Temperatures, Shih-Han Weng, Chung-Chia Yang, Shih-Wei Cho, Kuo-Cheng Yang
The Study Of Chloride Ion Transport Behavior Of Mortar Under Different Storing Environment Temperatures, Shih-Han Weng, Chung-Chia Yang, Shih-Wei Cho, Kuo-Cheng Yang
Journal of Marine Science and Technology
This study presents the chloride ion transport behavior of mortar from accelerated chloride migration test (ACMT). The water/cement ratio of mortars is 0.45, and the five volume fractions of fine aggregates (0%, 15%, 30%, 50% and 60%) were evaluated. After stored under different environment temperatures (25°C, 40°C, 60°Cand 80°C), the chloride ion passing through specimens was carried out with ACMT. From the Nernest-Planck equation and modified Fick’s second law, test data could be calculate the chloride migration coefficient of non-steady-state and steady-state. For mortar structure, dilution and tortuosity effects are positive effect to resist the penetration of Chloride ion. On …
Simultaneous Measurement Of Deformation And Temperature Of High-Strength Concrete At Very Early Age To Determine The Initial And The Finial Setting Time, Shu-Ken Lin, Chung-Ho Huang, Chao-Shun Chang, Tsong Yen, Chung-Hao Wu, Yiching Lin
Simultaneous Measurement Of Deformation And Temperature Of High-Strength Concrete At Very Early Age To Determine The Initial And The Finial Setting Time, Shu-Ken Lin, Chung-Ho Huang, Chao-Shun Chang, Tsong Yen, Chung-Hao Wu, Yiching Lin
Journal of Marine Science and Technology
The interior shrinkage deformation and temperature change of high-strength concrete (HSC) at very early age, i.e., the first 24 h from casting, and up to an age of 72 h was investigated experimentally using optic fibre sensors (SOFO) and thermally sensitive resistors. The initial and the final setting times of HSC were also investigated. Results show that two turning points (I and II) on the development curve of deformation, both represent the onsets of the variation of rigidity in fresh HSC, can be recognized as the initial and the final setting times, which are evaluated around 4.5 h to 5.7 …