【摘 要】
：
Saline soil is widely distributed in the marine sediments along the coast of the world and the arid-semi-arid areas of the Middle East and Iraq, and calcium sulfate erosion has become one of the important factors affecting the durability of concrete in th
【机 构】
：
College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China;Shan
【出 处】
：
中国海洋大学学报（自然科学英文版）
论文部分内容阅读
Saline soil is widely distributed in the marine sediments along the coast of the world and the arid-semi-arid areas of the Middle East and Iraq, and calcium sulfate erosion has become one of the important factors affecting the durability of concrete in this area. In order to clarify the mechanism of sulfate ion damage to concrete, this paper mainly takes saline soil with high sulfate content in coastal area as well as arid-semi-arid area as the research object, and uses indoor geotechnical test, field test and numerical simulation to study the influence of different dry-wet cycle times on the unconfined compressive strength of concrete test blocks, and puts forward the relationship between the erosion arrival depth and time of sulfate ion in concrete, so as to predict the long-term erosion depth by using the erosion depth of sulfate ion in concrete in short time. The results show that the shorter the erosion time when the erosion reaches a certain depth, and the larger the erosion reaches when the erosion time is the same, the faster the erosion reaches the depth with the increase of erosion time. Compared with rectangular section concrete, circular section concrete penetrates faster. The results of this study can provide a reference for the durability design of concrete in saline soil sites containing sulfate.
其他文献
Based on seawater immersion, drying-wetting cycles, carbonation and drying-wetting cycles for coral aggregate sea-water concrete (CASC) with different strength grades, the effect of carbonation and drying-wetting cycles on chloride diffusion be-havior of
Dammam City is one of the gorgeous coastal areas in the Arabian Gulf of Saudi Arabia. The present study aimed to ex- amine one of the copepod species infecting the rosy goatfish that represents a highly consumed fish species by the local population in the
The objective of this paper is to propose an empirical method to inverse significant wave height (SWH) under typhoon conditions from collected dual-polarization Gaofen (GF)-3 synthetic aperture radar (SAR) imagery. The typhoon scenes were cap-tured from n
As fish stocks have been overexploited and catches have decreased over the last few years, the cephalopod catch has increased globally to the point that they are now among the most important marine resources in the world. Climate change and hu-man activit
Silver nanoparticles (AgNPs) have been widely used in medicine and consumer products. And it enters the river in dif-ferent ways, then finally converges to the ocean through the estuary. AgNPs polution can affect NO2? and N2O production by denitri-fiers i
The electric inversion technique reconstructs the subsurface medium distribution from acquired data. On the basis of electric inversion, objects buried under the earth or seabed, such as pipelines and unexploded ordnance, are detected and located in a con
Crustacean is one of the major allergic foods. It is of great significance to identify more crab allergens and research the detection methods for crab food anaphylaxis. In this study, IgE reactivity to three recombinant proteins from Portunus tritubercula
Artificial reef is a man-made object that is deployed purposefully on the seafloor to restore the offshore fishery resources and the ecological environment. To secure its ecological effects, it is important to study the possible instability of artificial
High salt and low temperature are the bottlenecks for the remove of oil contaminants by enriched crude-oil degrading microbiota in Liaohe Estuarine Wetland (LEW), China. To improve the performance of crude-oil removal, microbiota was further immobilized b
To accurately characterize the shear wave speed dispersion of seafloor sediments in the northern South China Sea, five types of sediments including silty clay, clayey silt, sandy silt, silty sand, and clayey sand were selected, on which the measurements o