The Experts below are selected from a list of 46953 Experts worldwide ranked by ideXlab platform
Hongxi Wang - One of the best experts on this subject based on the ideXlab platform.
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bonding and abrasion resistance of geopolymeric Repair Material made with steel slag
Cement & Concrete Composites, 2008Co-Authors: Hongxi Wang, Gaozhan Zhang, Qingjun DingAbstract:Three Repair Materials were prepared using cement-based, geopolymeric, or geopolymeric containing steel slag binders. Their mechanical performances such as compressive strength, bond strength and abrasion resistance were examined experimentally. The test results showed that the geopolymeric Materials had better Repair characteristics than cement-based Repair Materials, and the addition of steel slag could improve significantly the abrasion resistance of geopolymeric Repair. By means of scanning electron microscopy (SEM) it can also be concluded that the steel slag was almost fully absorbed to take part in the alkali-activated reaction and be immobilized into the amorphous aluminosilicate geopolymer matrix.
Chuite Chiu - One of the best experts on this subject based on the ideXlab platform.
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a preliminary study of reactive powder concrete as a new Repair Material
Construction and Building Materials, 2007Co-Authors: Minggin Lee, Yungchih Wang, Chuite ChiuAbstract:Abstract This study aims to use reactive powder concrete (RPC) as a new Repair Material and evaluate its bond durability to existing concrete. One accelerated aging environment, namely a freeze–thaw cycle acceleration deterioration test, was selected for the evaluation of bond durability of the Repair Materials. Before and after aging, the samples were evaluated by the compressive strength, bond strength (slant shear test), steel pull out strength, and relative dynamic modulus NDT tests. The test results show that the RPC displays excellent Repair and retrofit potentials on compressive and flexure strengthening and possesses high bond strength, dynamic modulus and bond durability as compared with other concretes. The adhesion between the RPC and the steel is also much greater than that for the other concretes. It would be interesting to verify the consequences of this improved adhesion and Repair in reinforced concrete structures.
Qingjun Ding - One of the best experts on this subject based on the ideXlab platform.
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bonding and abrasion resistance of geopolymeric Repair Material made with steel slag
Cement & Concrete Composites, 2008Co-Authors: Hongxi Wang, Gaozhan Zhang, Qingjun DingAbstract:Three Repair Materials were prepared using cement-based, geopolymeric, or geopolymeric containing steel slag binders. Their mechanical performances such as compressive strength, bond strength and abrasion resistance were examined experimentally. The test results showed that the geopolymeric Materials had better Repair characteristics than cement-based Repair Materials, and the addition of steel slag could improve significantly the abrasion resistance of geopolymeric Repair. By means of scanning electron microscopy (SEM) it can also be concluded that the steel slag was almost fully absorbed to take part in the alkali-activated reaction and be immobilized into the amorphous aluminosilicate geopolymer matrix.
Minggin Lee - One of the best experts on this subject based on the ideXlab platform.
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a preliminary study of reactive powder concrete as a new Repair Material
Construction and Building Materials, 2007Co-Authors: Minggin Lee, Yungchih Wang, Chuite ChiuAbstract:Abstract This study aims to use reactive powder concrete (RPC) as a new Repair Material and evaluate its bond durability to existing concrete. One accelerated aging environment, namely a freeze–thaw cycle acceleration deterioration test, was selected for the evaluation of bond durability of the Repair Materials. Before and after aging, the samples were evaluated by the compressive strength, bond strength (slant shear test), steel pull out strength, and relative dynamic modulus NDT tests. The test results show that the RPC displays excellent Repair and retrofit potentials on compressive and flexure strengthening and possesses high bond strength, dynamic modulus and bond durability as compared with other concretes. The adhesion between the RPC and the steel is also much greater than that for the other concretes. It would be interesting to verify the consequences of this improved adhesion and Repair in reinforced concrete structures.
Esther Berastegui - One of the best experts on this subject based on the ideXlab platform.
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in vitro comparison of apical microleakage by spectrophotometry in simulated apexification using white mineral trioxide aggregate totalfill bioceramic root Repair Material and biodentine
Journal of Conservative Dentistry, 2019Co-Authors: M Juez, M L Ballester, Esther BerasteguiAbstract:Aim: The purpose of this study was to compare the sealing ability of various calcium silicate-based root-filling Materials with a glucose leakage model after orthograde obturation using an open apex model. Materials and Methods: Thirty-two recently extracted human maxillary anterior teeth with single, straight root canals were selected and divided into four groups: Group 1 (G1), White Mineral Trioxide Aggregate; the Material was delivered into the canal using the MAP system and further compacted with a specific plugger. Group 2 (G2), TotalFill bioceramic Root Repair Material: the Material was injected directly into the middle half of the root canal. Group 3 (G3), BioDentine; the Material was delivered into the canal using the Hawe composite gun and prefitted pluggers. Statistical Analysis: Statistical analysis was performed using the SPSS 23.0 statistical software package. The Kruskal–Wallis nonparametric test was applied to compare the differences in glucose microleakage. Results: There were no significant differences among the three experimental groups. The results showed a tendency for leakage to increase from the 1st day to the end of experimental period. Conclusions: Within the parameters of this in vitro study, it may be concluded that the three Materials evaluated present similar apical microleakage when treating teeth with open apices requiring orthograde delivery of an apical barrier.
