【摘 要】
:
The relationship between compressive strength obtained by universal testing machine and rebound value obtained by the hammer of high performance concrete was systematically investigated at the macro level. And a model of high performance concrete strength
【机 构】
:
School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
【出 处】
:
武汉理工大学学报(材料科学版)(英文版)
论文部分内容阅读
The relationship between compressive strength obtained by universal testing machine and rebound value obtained by the hammer of high performance concrete was systematically investigated at the macro level. And a model of high performance concrete strength curve was established from them. At the micro level, the microstructure, hydration products and pore structure of concrete surface were analyzed by scanning electron microscopy (SEM), comprehensive thermal analysis (TG-DSC) and mercury intrusion porosimetry (MIP), respectively. The effect of carbonation on surface strength was also investigated. The results showed that the concrete surface hardness layer grew rapidly at early stage and then stabilized at last with ongoing curing age; the rebound value and compressive strength of concrete with slag were higher than those of concrete with the same content of fly ash. In addition, the strength curve obtained by the least square method can satisfy the local standard requirements with an average relative error of 8.9% and a relative standard deviation of 11.3%. When the carbonation depth was 6 mm, the compressive strength calculated by national uniform strength curve was 25 PMa higher than that by high performance concrete.
其他文献
A novel semisolid continuous Micro Fused-Casting additive manufacturing technology for producing a ZL101 alloy strip was developed, Micro Fused-Casting means that the semisolid metal slurry was pressed out from the outlet of bottom of crucible to the mova
In order to enhance the p-type doping concentration in the LBSF, boron was added into the aluminum paste and boron doped local back surface field (B-LBSF) was successfully fabricated in this work. Through boron doping in the LBSF, much higher doping conce
As efficient water treatment agents, a novel series of rectorite-based ZnO and TiO2 hybrid composites (REC/ZnO/TiO2) were synthesized and characterized in this study. Effects of experimental parameters including TiO2 mass ratio, solution pH and catalyst d
Hierarchically interconnected porous activated carbon have high specific surface areas, large numbers of dye adsorption sites, and interconnected pores for dye molecule diffusion and transportation. We prepared hierarchically interconnected porous banana
The objective of this study was to assess the feasibility of using the plant-source polymer of the matcha powder as a composite admixture for hemihydrate gypsum. Hemihydrate gypsum was mixed with different contents of matcha powder, and then the water req
The lattice dynamic,elastic,and thermodynamic properties of BeSe were investigated with first principles calculations.The phase transition pressure from the zinc blende (B3) to the nickel arsenide (B8) structure of BeSe was determined.The elastic stabilit
The urea-formaldehyde resin/reactive montmorillonite composites were prepared by in situ polymerization. The reactive montmorillonite was prepared firstly by being ion exchanged with organic molecules and secondly by being grafted with silane coupling age
The morphology,nanomechanical properties and interfacial regions of natural rubber(NR)and FeCo nanoparticles composite were determined by AFM nanomechanical mapping.The results showed that the size of FeCo particles was mostly from 40 to 100 nm and the Fe
In order to present a novel metronidazole-decorated Ti implanted with antibacterial activity through adhesive dopamine,and prepare metronidazole-decorated Ti,Ti substrates were pre-modified with dopamine (DA) coating,and metronidazole was subsequently imm