ASTM specifications classify masonry mortar into Type M, Type S, Type N, and Type O. The mortar can be specified based on the volume proportions of its three ingredients (Portland cement, lime, and sand) or based the mortar's strength. In which situations is strength specification used?
What will be an ideal response?
Strength specification yields an economical mortar in large, load-bearing walls projects. It is, therefore, used in such
situations?situations that are not common.
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En los sistemas de alarma contra incendios direccionables analógicos, el estado de la alarma lo determina(n):
a. el panel de control. b. los dispositivos de iniciación. c. los dispositivos de notificación. d. los dispositivos de comunicación.
Which of the following is an excellent conductor but too expensive to use on a large scale?
a. Silver b. Aluminum c. Brass d. Copper
10 moles of an ideal gas is confined in a piston-cylinder device. The gas is initially at T = 300 K and P = 1 bar. It is compressed isothermally to 10 bar. The gas has a heat capacity CV = (5/2)R.
A) What is the final volume of the gas? B) How much work is required to accomplish the compression? C) What is the change in internal energy of the ideal gas? D) What is the change in enthalpy of the ideal gas?
(a) Plot the grain-size distribution curve for this sample. (b) Determine D10, D30, and D60. (c) Calculate the uniformity coefficient, Cu. (d) Calculate the coefficient of gradation, Cc.
Following are the results of a sieve analysis:
What will be an ideal response?