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This study proposed
a new way to formulate a low energy super-sulfated cement (SSC) which can be
used to produce self-compacting concrete (SCC) with high compressive strength
and durability in terms of chloride penetration resistance. This innovative
SSC, different from the traditional SSC, was purely produced with a ternary
mixture of three industrial by-products of ground granulated blast furnace
slag, low calcium Class F fly ash and circulating fluidized bed combustion
(CFBC) fly ash and was denoted as SFC-SSC (super-sulfated cement made by
mixture of slag, Class F fly ash and CFBC fly ash). Experimental results showed
that the combination of a fixed amount of 15 wt.% of CFBC fly ash with various
ratios of Class F fly ash to slag could be used to produce the hardened SCCs
with high 28-day compressive strengths (41.8 - 65.6 MPa). Addition of Class F
fly ash led to the resulting SCCs with lowered price and preferable engineering
properties, and thus it was considered as state-of-the-art method to drive such
type of concrete towards sustainable construction materials.
Sodium azide (NaN3)
(2 mM) was used to induce
mutation in black soybean variety CRWD for improvement of isoflavone content.
The individual selections were made in M6, M7 and M8 generations, respectively.
Both high levels of isoflavones and medium seed size traits were used as
selection criteria. Across three growth seasons, the selected five NaN3-induced
mutants accumulated more total
isoflavones (average increases of 5% to 25%) than their wild type variety CRWD. Four mutants yielded
more (average increases of 17% to 25%) than CRWD. Both mutants SA-M-03 (yellow cotyledon) and SA-M-05 (green cotyledon) are rich in isoflavones
and may be useful in food and other applications.