يعرض 1,121 - 1,140 نتائج من 1,844 نتيجة بحث عن '(( i a decrease ) OR ( 10 ((meter decrease) OR (((mean decrease) OR (a decrease)))) ))*', وقت الاستعلام: 0.16s تنقيح النتائج
  1. 1121

    Improving Concrete Durability by Using Optimized Aggregate Gradation and Reducing Cement Content حسب Chung, Hung-Wen

    منشور في 2020
    "…The main findings from this study are as follows: (1) The cementitious content of typical Florida pavement and structural concrete can be reduced by as much as 10 to 15% without loss in workability of the fresh concrete, and without decreasing the strength and durability of the hardened concrete. (2) Portlandlimestone cement (Type IL) can be used as a substitute for ordinary Portland cement (Type I/II). (3) The OAG technique can be used to efficiently reduce the cementitious content of the concrete mixes and to improve their performance."…"
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  2. 1122
  3. 1123
  4. 1124
  5. 1125
  6. 1126

    Theoretical insight into effect of cation–anion pairs on CO2 reduction on bismuth electrocatalysts حسب Sun Hee, Yoon

    منشور في 2020
    "…This study presents theoretical insight into the mechanism of the CO2 reduction reaction (CO2RR) to formic acid (HCOOH) on Bi (012) surfaces in the presence of alkali metal cations (M+: Cs+, K+, and Li+) and/or halide anions (X−: Cl−, Br−, and I−) using density functional theory (DFT). The adsorption energy (Eads) and work function (Wf) of the anions increases with decreasing anion size (i.e., Cl− > Br− > I−). …"
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  7. 1127

    Evaluation of different personalized ventilation air terminal devices: Inhalation vs. clothing-mediated exposures حسب Al Assaad, Douaa

    منشور في 2021
    "…The model was validated experimentally in a climatic chamber by comparing real-time particle mass concentration near a thermal manikin. …"
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  8. 1128
  9. 1129
  10. 1130
  11. 1131
  12. 1132
  13. 1133

    Conversion of Organic Municipal Wastes into Biochars and their Effect on Fertility Parameters of Normal and Sabkha Soils of Qatar حسب Ahmedna, Mohamed

    منشور في 2016
    "…To each pot, sufficient amount of 0.25-mm sieved biochar was mixed with soil to yield carbon to soil ratios of 0, 1, and 2% (wt/wt). Box-Behnken experimental design was used instead of the full factorial to decrease the number of treatments to a manageable level (126 treatments) with three replications at the center. …"
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  14. 1134
  15. 1135
  16. 1136
  17. 1137
  18. 1138

    Use Of Cement By-Pass Dust In Soil Stabilization حسب Taha, Ramzi

    منشور في 2001
    "…Cement by-pass dust (CBPD) or cement kiln dust (CKD) is a by-product of the manufacture of Portland cement. …"
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  19. 1139
  20. 1140

    Shear Behavior of Green Concrete Beams Reinforced with Basalt FRP Bars and Stirrups. حسب Elahtem, Ayman Ahmed

    منشور في 2020
    "…The parameters investigated in this study are span to depth ratio (i.e. a/d =2.5 and 3.5), reinforcement ratio , stirrups spacing effect (i.e. 250 mm and 350 mm) and stirrups type (Steel and Basalt). …"
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