Results 11 to 20 of about 82,308 (273)

Utilizing of coral/sea sand as aggregates in environment-friendly marine mortar: Physical properties, carbonation resistance and microstructure

open access: yesCase Studies in Construction Materials, 2022
The utilization of marine waste and resources to produce eco-friendly building materials is essential for the sustainable development of the construction industry on islands and coastal areas.
Songsong He   +3 more
doaj   +1 more source

Halo- and Thiocarbazomycins from Coral- and Coral Reef Sands-Derived Actinomycetes

open access: yesMarine Drugs, 2022
Four actinomycete strains isolated from the coral Acropora austera and coral sand samples from the South China Sea, were found to produce a series of halogenated compounds baring similar ultraviolet absorption based on the analysis of HPLC and LC-MS. The production titers of halogenated compounds from Streptomyces diacarni SCSIO 64983 exceeded those of
Qiaoling Wu   +7 more
openaire   +3 more sources

Long-term thaumasite sulfate attack on mortar containing coral sand filler and SCMs exposed to sodium sulfate solution

open access: yesCase Studies in Construction Materials, 2023
The use of coral sand filler and supplementary cementitious materials partially replacing Portland cement facilitates the utilization of coral debris waste in oceanic construction as well as CO2 emission.
Xinjun Song, Ying Ma
doaj   +1 more source

Experimental study on the effect of subsurface freshwater-saltwater mixing on the permeability of coral sand

open access: yes地质科技通报, 2023
Objective The permeability of coral sand is the key factor determining the groundwater reserves of coral islands. For a long time, the research on the influence of different salinity filtrates on the permeability of coral sand during the formation of ...
Yinghao Li   +5 more
doaj   +1 more source

Centrifuge Shaking Table Test on the Seismic Dynamics of Revetment Breakwater and a Nearby Aircraft Runway Built on Reclaimed Coral Sand Foundation

open access: yesJournal of Marine Science and Engineering, 2022
There are currently at least five aircraft runways built on the reclaimed coral sand foundations in the South China Sea (SCS). The seismic dynamics and stability of the revetment breakwaters and nearby aircraft runways built on reclaimed lands with coral
Yu Zhang   +3 more
doaj   +1 more source

Experimental study on dynamic shear modulus and damping ratio of coral sand from Nansha Islands

open access: yesRock and Soil Mechanics, 2020
The physical and engineering mechanical behaviors between coral sand and terrigenous sandy soils are considerably different. To study these behaviours, a series of undrained multistage strain-controlled cyclic triaxial tests were conducted on saturated
LIANG Ke, HE Yang, CHEN Guo-xing
doaj   +1 more source

The Hydrodynamic Dispersion Characteristics of Coral Sands [PDF]

open access: yesJournal of Marine Science and Engineering, 2019
Dispersion characteristics are important factors affecting groundwater solute transport in porous media. In marine environments, solute dispersion leads to the formation of freshwater aquifers under islands. In this study, a series of model tests were designed to explore the relationship between the dispersion characteristics of solute in calcareous ...
Cui, Xiang   +4 more
openaire   +2 more sources

Study on the Shear Band of Sand with Various Particle Characteristics Using PIV Analysis [PDF]

open access: yesE3S Web of Conferences, 2019
The phenomenon of ground undergoing large plastic deformation, leading to collapse, occurs due to the localization of unstable deformation. The investigation of shear band is important in order to understand the destructive phenomenon.
Kajiyama Shintaro   +3 more
doaj   +1 more source

The Bottom Substrate Shallow Water Mapping Using the Quick Bird Satellite Imagery [PDF]

open access: yes, 2010
The objective of this study was to explore the capability of high resolution satellite data of QuicBird to map the characteristics of the bottom shallow water (habitat) using the transformation method of two bands (blue and green) by implementing "depth ...
Siregar, V. (Vincentius)
core   +3 more sources

Chloride retention mechanism of coral sand cement stones modified by graphene oxide

open access: yes工程科学学报, 2022
In the marine environment far away from the mainland, the coral sand foundation can be improved by injecting the cement grout with a very small amount of graphene oxide (GO) through grouting or mixing piles and other processes, which can greatly increase
Bin CHEN   +6 more
doaj   +1 more source

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