Zobrazeno 1 - 10
of 16
pro vyhledávání: '"Masoud Moradian"'
Publikováno v:
Cement and Concrete Composites. 98:150-161
Concrete mixtures with different aggregate gradations and workability were prepared and X-ray computed tomography (XCT) is used to study the aggregate packing in hardened concrete. The workability of the mixtures was measured and then the aggregate s
Publikováno v:
Materials & Design, Vol 157, Iss, Pp 314-325 (2018)
While the stress-induced dissolution of various minerals has gained attention as an important time-dependent deformation mechanism, this has only sparingly been investigated in portland cement systems. In this paper, X-ray Computed Tomography (XCT) i
Publikováno v:
Construction and Building Materials. 162:649-662
Chloride-induced corrosion is commonly recognized to be a major cause of deterioration of coastal reinforced concrete structures (CRCS). Therefore, prediction of chloride penetration into concrete is a major concern in durability based design of CRCS
Autor:
Mohammed Aboustait, George W. Scherer, Xianghui Xiao, Zhidong Zhang, M. Tyler Ley, Jay C. Hanan, Qinang Hu, Masoud Moradian
Publikováno v:
Materials & Design, Vol 136, Iss, Pp 137-149 (2017)
This paper follows the hydration of both portland cement and tricalcium silicate pastes between 30 min and 16 h of hydration. In-situ fast X-ray computed tomography (fCT) was used to make direct observations of the air-filled void formation in w/s of
Publikováno v:
Computers and Concrete. 18:367-388
In this paper, a simple practical method is introduced in which a simple weight measurement of concrete and finite element numerical analysis are used to determine the moisture transfer coefficient of concrete with a satisfactory accuracy. Six concre
Autor:
Ghazal Sokhansefat, M. Tyler Ley, Jason Weiss, Catherine Lucero, Mark Finnell, Masoud Moradian, Amir Behravan
Publikováno v:
Cement and Concrete Composites. 108:103520
This work uses X-ray computed micro tomography (XCT) to investigate the role of the critical degree of saturation (DOS) and air void system on the crack propagation of portland cement mortar subjected to freeze-thaw cycles. Three-dimensional imaging
Autor:
Brianna Sullins, Ali Zolghadr, Biernacki J, Tyler Ley, Matthew D. Kelley, Masoud Moradian, Ghazal Sokhansefat
Publikováno v:
Bioresource technology. 273
A method for manufacturing biomass microspheres is introduced. Biomass microspheres between 100 and 400 µm in diameter were produced from crystalline cellulose, switchgrass, and tall fescue using spray drying. The biomass microspheres were character
Autor:
Masoud Moradian, Jay C. Hanan, Mohammed Aboustait, Xianghui Xiao, M. Tyler Ley, Bret Robertson, Qinang Hu
Publikováno v:
Composites Part B: Engineering. 175:107099
This paper uses fast X-ray Computed Tomography (fCT) to study the change in air-filled voids during hydration of portland cement pastes of different water to cement ratios and with fly ash and limestone additives between 30 min and 12 h of hydration
Publikováno v:
Journal of Performance of Constructed Facilities. 27:519-528
The long-term behavior of concrete structures has shown that their main cause of distress is reinforcement corrosion. One of the most punishing exposure conditions for concrete is a marine environment such as that found in the Persian Gulf. Reinforce
Publikováno v:
Construction and Building Materials. 46:63-70
The Persian Gulf is well known as one of the most aggressive environments in the world because of its high relative humidity, temperature and concentration of chloride ions. Therefore, studying the deterioration processes, such as the chloride ion pe