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Synthesis of Ligand-free CdS Nanoparticles within a Sulfur Copolymer Matrix
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Published on: May 1, 2016

设计,合成和实用性的支持绑定的三乙硫胺

D R Dragoli1, M T Burdett, J A Ellman

  • 1Center for New Directions in Organic Synthesis, Department of Chemistry, University of California, Berkeley, California 94720, USA.

Journal of the American Chemical Society
|October 11, 2001
PubMed
概括

No abstract available in PubMed .

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Bonding and Strength of Aggregate01:12

Bonding and Strength of Aggregate

The bond between aggregate particles and the cement matrix is significantly influenced by the shape and surface texture of the aggregates. High-strength concretes benefit from a rougher texture, which leads to stronger bonding due to greater adhesion. Angular aggregates with larger surface areas also enhance this bond. The bonding quality, however, is complex to assess as no universally accepted test exists. Good bonding is indicated when a crushed concrete specimen shows some aggregate...
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Accelerators in concrete serve as admixtures to speed up the hardening process, enabling the concrete to achieve early strength faster. Although accelerators do not necessarily impact the time it takes concrete to set, they reduce this time in practice. A common accelerator is calcium chloride, which is particularly useful for hastening early strength development in cold weather or for rapid repair jobs that require quick heat generation after mixing.
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