ACI 345R-11: Guide for Concrete Highway Bridge Deck by ACI Committee 345

By ACI Committee 345

The service-life functionality of concrete bridge decks, together with upkeep, fix, and rehabilitation wishes, is without delay on the topic of the care exercised from the preconstruction via post-construction interval. This advisor presents suggestions for bridge deck building according to concerns of sturdiness, concrete fabrics, reinforcement, putting, completing and curing, and overlays.

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Zn++ (aq) + 2e− → Zn(s) (a) In a process it has been measured that 1500 g Zn per hour is deposited at constant current in a galvanic bath. Calculate the current i (A) in the bath! 39 g/mol. ) For industrial heating purposes combustible gases such as propane C3 H8 , butane C4 H10 or a mixture of these gases are often used. In the CRC Handbook of Chemistry and Physics the following van der Waals constants are given for propane and butane: Gas Chem. 1226 a) convert these van der Waals constants into SI units, and b) calculate critical temperature ( o C) and c) critical pressure p (atm) for propane and butane.

Denotes the number of protons in an atom nucleus; the proton number Z is also called atomic number. Neutron number N . . . . denotes the number of neutrons in an atom nucleus. Element . . . . . . . . . . e. contain the same number of protons in the nucleus. Isotope . . . . . . . . . . chemically identical atoms with different mass number A is said to be isotopes of the same element. Atomic mass constant . . . 6606 · 10−27 kg is defined as 1/12 of the rest mass of the carbon 12 atom.

30. The Danish prototype for mass is a 1 kilogram weight made from platinum alloyed with 10 % iridium. The weight is kept at Danish National Metrology Institute at the Technical University of Denmark. Prefixes So-called prefixes can be used in front of SI units; they can be used to form appropriate numerical values, names and symbols for the decimal multiples of SI units. 9. Overview of the prefixes of the SI system; the most frequently used prefixes are emphasized in the table. Note: The base unit for mass – kilogram – contains the SI prefix “kilo”, so in this special case multiples of the SI unit are formed by adding the prefix to the unit gram.

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