In a pull-out test, a concrete cylinder containing the bar is placed on a stiff plate and a jack is used to push the bar into the cylinder.

There are no ACI Code requirements placed on structural integrity of cast-in-place reinforced concrete construction, precast construction, and prestressed concrete slabs.

Verb list: estudiar – comprar – salir – volver – almorzar – beber Ay, mami, ¡qué día tan intenso ayer! Por la mañana, Paula y yo [q34] tarde de casa sin poder comer. Tuve hambre hasta que yo [q35] un sándwich de pollo por 10 dólares en la cafetería. Paula [q36] una ensalada a las 1:30. También, nosotras [q37] café en la cafetería. A las 5:30, mis amigos Paula y Juan [q38] a casa para preparar la cena. Y tú, ¿[q39] en la biblioteca por dos horas más por la noche?

In the long-term, the concrete frame of a building will shorten due to creep and the brick exterior will expand due to an increase in moisture content.

A rectangular beam has a cross section of b = 16 in., h = 28 in., and d = 25.5 in. It is reinforced with two No. 5 Grade 60 bars. The concrete strength is 4,600 psi (normal weight). The beam has Grade 60 No. 3 stirrups satisfying ACI 318-14 Sections 9.7.6.2.2 and 9.6.3.3. Determine the strength φMn for this beam.

In welded-wire reinforcement, deformed-wire reinforcement derives anchorage from bond stresses along the _______ wires and from mechanical anchorage from the _______ wires.

A rectangular beam has a cross section of b = 16 in., h = 22 in., and d = 19.5 in. It is reinforced with two No. 7 Grade 60 bars. The concrete strength is 8,200 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the cracked moment of inertia, Icr. The neutral axis location of the cracked beam (measured from the top of the beam) is 3.6543 in.

Concrete can crack due to imposed deformations, such as differential settlement, shrinkage, and temperature differentials.

Determine the casting-position modification factor, ψt, for a rectangular beam with b = 16 in. and d = 20 in., three galvanized No. 9 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 10 in. along the span. Assume 8,000-psi lightweight concrete and a clear cover of 2 in.

In order for a reinforced concrete beam to function properly (concrete resisting compression, steel resisting tension), a bond must exist between the concrete and the reinforcement.