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Optimization of shrinkage and crack resistance performance of Engineered Cementitious Composites (ECC) is investigated due to ECC with higher drying shrinkage. Free shrinkage tests were used to research the influence of fiber content, superplasticizer (SP) and finely ground quartz powder (QP) on the total drying shrinkage value of ECC. Restrained drying shrinkage tests (ring tests) were used to research...
In this paper, an improved space charge measurement system based on the pulsed electro acoustic technique (PEA) is presented. The new system gives an essential way to examine the role of space charge in electrical aging process under AC conditions. The system setup for AC measurement is presented and detailed in this paper with comparison to the old system. There are two features with improved PEA...
To avoid repetitive work of building information systems inefficiently, a multi-layer framework aiming at high performance is designed and implemented for common information system based on .NET. Many design patterns are applied so the framework is scalable, which provides various core services. Practices have proved that multi-pattern systems can be developed efficiently based on the framework. Various...
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