Experimental and Numerical Analysis of Restrained Early Age Cracking based on Electrical Resistivity

来源 :武汉理工大学学报(材料科学版)(英文版) | 被引量 : 0次 | 上传用户:ouwenliao
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Crack potential and hydration processes of the cement pastes were monitored using an up-to-date eccentric steel cracking frame (ESCF), associated with the non-contact electrical resistivity apparatus, independently. The objective of employing the ESCF is to give a new method determining cracks of concrete at early age. The findings indicate that the lowest water-cement ratio paste reveals highest resistivity values, compasses an earlier inflection point and obtained higher stress. The eccentric restrained cracking test exhibited that lower water-cement ratio paste cracked at the earliest time, accordingly confirms cracking tendency is the highest. Tensile strength test and stresses utilizing ABAQUS simulation was performed. The crack initiation ages obtained are consistent with the experimental program results, which indicates that ABAQUS numerical analysis can well be utilized to predict the crack tendency of cement.
其他文献
The effect of crystallization conditions of poly(butylene succinate) (PBS) component on the crystallization of poly(tetramethylene oxide) (PTMO) component in their segment block copolymer, with a higher PTMO content (PTMO mass fraction is 67%), was invest
To reveal the influence of mechanical activation on the performance of fly ash,the microanalysis (the energy spectroscopy,XRD and SEM),the distribution size of particle of fly ash and cement paste intensity of various age for different grinding time were
The performances of the cement-based materials can be improved by the incorporation of polypropylene fiber, but the damage processes become more complex with different fiber contents at the same time. The acoustic emission (AE) technology can achieve the
Based on the similarity theory, a new experimental method named Similar Experimental Method for Durability of Concrete (SEMDC) was established. The existing experimental methods for durability of concrete were summarized, and the merits and demerits of th
Titanium phosphonate adsorbent materials with hierarchically porous structure were fabricated using the hydrolysis of tetrabutyl titanate in different organophosphonic acids solutions. Based on the macroporous structure of 100-2000 nm in size, a worm-hole
An efficient,practical,highly selective and environmentally benign method is reported for the synthesis of aryl thioethers via the coupling of thiols with aryl boronic acids in the presence of NaOH and a catalytic amount of CuSO4 at 130 ℃ using water as a
SiC/Gr/ZL101 aluminum-based composites were prepared by semi-solid stirring and gravity pouring method. The effects of SiC/Gr with different volume fractions on the microstructure and property of aluminum-based composites were studied by means of microstr
SiCp/Cu composites with a compact microstructure were successfully fabricated by vacuum hot-pressing method. In order to suppress the detrimental interfacial reactions and ameliorate the interfacial bonding between copper and silicon carbide, molybdenum c
The nanostructure of cementitious materials has important effects on concrete properties.The effects of rice husk ash (RHA) on cement hydration product phases and interfacial transition zone (ITZ) in mortar were investigated from the nano-scale structure