Effect of Curing Temperature Histories on the Compressive Strength Development of High-Strength Concrete

Abstract

This study examined the relative strength-maturity relationship of high-strength concrete (HSC) specifically developed for nuclear facility structures while considering the economic efficiency and durability of the concrete. Two types of mixture proportions with water-to-binder ratios of 0.4 and 0.28 were tested under different temperature histories including (1) isothermal curing conditions of 5°C, 20°C, and 40°C and (2) terraced temperature histories of 20°C for an initial age of individual 1, 3, or 7 days and a constant temperature of 5°C for the subsequent ages. On the basis of the test results, the traditional maturity function of an equivalent age was modified to consider the offset maturity and the insignificance of subsequent curing temperature after an age of 3 days on later strength of concrete. To determine the key parameters in the maturity function, the setting behavior, apparent activation energy, and rate constant of the prepared mixtures were also measured. This study reveals that the compressive strength development of HSC cured at the reference temperature for an early age of 3 days is insignificantly affected by the subsequent curing temperature histories. The proposed maturity approach with the modified equivalent age accurately predicts the strength development of HSC.

Crossover Effect in Cement-Based Materials: A Review

“…The COE in CBMs due to accelerated initial and prolonged curing is of great concern to researchers because of the utmost importance of concrete structures in the present construction industry. Some researchers [15,17,19] explained that the loss in compressive strengths of CBMs at later ages is because of different initial curing temperatures. Yang et al [19] studied the strength development of concrete due to different initial curing temperatures with ageing (see Figure 2).…”

“…Some researchers [15,17,19] explained that the loss in compressive strengths of CBMs at later ages is because of different initial curing temperatures. Yang et al [19] studied the strength development of concrete due to different initial curing temperatures with ageing (see Figure 2). They found a significant difference in compressive strengths of concretes at later ages because of various initial curing temperatures.…”

Effect of Elevated Temperature on Mechanical Properties of Waste Polymers Polyethylene Terephthalate and Low Density Polyethylene Filled Normal Concrete Blocks

“…The plast-cretes showed a higher level of resistance to spalling than the NC at elevated temperatures because the melted plastics absorbed into the matrix of the concrete created a pathway for explosive gases to escape through the pores of the concrete rapidly, preventing spalling [32][33][34].…”

Extending BIM Interoperability for Real-Time Concrete Formwork Process Monitoring

“…(where, t e : equivalent age at the temperature; E a : activation energy; R: universal gas constant; T: average absolute temperature during interval time, ∆t) The activation energy was considered to be constant for all cement types (in accordance with the recommendation in Carino and ASTM C1074). Many studies have argued that activation energy can depend on time and temperature [10,[52][53][54][55]. However, it is customary to assume constant activation energy.…”