The objective of this research study was to evaluate the compressive mechanical response of a rapid strengthening ultra-high performance concrete (UHPC) formulation when exposed to a range of curing conditions. This research result is critical to the broader use of UHPC-class materials as field-cast grouts in connections between prefabricated bridge elements and systems (PBES) components. The compressive strength, modulus of elasticity, axial strain at peak strength, and overall stress-strain response were captured under three curing conditions from early age through 56 days after casting. At an elevated curing temperature, the UHPC was observed to reach 10,000 pounds per square inch compressive strength at 11 hours. Actual weight varies with type of cement. Cement is the binding element in both concrete and mortar. The shorthand for the basic compounds is: Chemical composition of clinker The cement clinker formed has the following typical composition: Representative weights only. A fine manufactured mineral powder used as a binding agent in mortar, concrete, and other building materials. The time to initiation and rate of property development was observed to be influenced by the ambient environment surrounding the concrete during curing. Chemical shorthand Because of the complex chemical nature of cement, a shorthand form is used to denote the chemical compounds. This research program investigated the compressive mechanical response of a new UHPC formulation intended for use in field-cast infrastructure connections. Traditional UHPC formulations tend to express a delay prior to setting and initial mechanical property development. Ultra-high performance concrete (UHPC), when used in field-cast connections between prefabricated bridge elements, can create robust connections that emulate monolithic components. The rate of compressive mechanical response development is of importance to construction projects wherein the concrete hydration is on the critical path. Compressive mechanical properties are critical indicators of the degree of hydration of concrete and are frequently used as indicators of other mechanical and durability properties.
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