Prediction of concrete strength considering thermal damage
In recent years, many studies and standards [3] have suggested using maturity
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In recent years, many studies and standards [3] have suggested using maturity
This paper delivers a review of the prediction methods of the early-age strength of
According to the concrete maturity method, concrete strength development is strongly
The current study is based on a widely used approach for predicting the early age
When exposed to realistic temperature curing conditions, the reference concrete, ANL Ref., displayed a reduction in compressive strength, tensile strength, and E-modulus at both 28 days and 91 days of maturity. The fly ash concrete, ANL FA33, showed a small increase in compressive and tensile strength, and a distinct increase in
The maturity method is a technique used to provide a more accurate estimate of the effects of time and temperature on concrete strength development. The maturity method is a non-destructive and reliable way of estimating in-situ concrete strength. Compression tests are performed on at least two specimens at ages 1, 3, 7, 14, and 28 days
Maturity is a concept that has existed since the 1950s. Since then, various equations have been proposed to measure the maturity of concrete. This chapter discusses three different methods that can be used in concrete maturity measuremen the temperature-time factor, the equivalent age, and the weighted
The creep behavior of concrete depends on the maturity and age of the concrete when load is initially applied. To assess the loading age and maturity effects on UHPC, Fig. 6 plots normalized creep values, as previously discussed, versus UHPC age at the time of loading. Early-age values, which in this normalized plot equal 1.0, are plotted
The actual concrete curing starts in the moment of compaction – maintaining ambient relative humidity over 90% limits shrinkage deformations to a large extent. Due to shrinkage limitation, it is recommended to maintain the wet curing within 7 days for stocky elements as well as within 14 days for flat and spacious
Saul and Arrhenius maturity functions, and stated that the considered methods are only accurate for the first 7 days of concrete curing. Refs. [11,12] carried out the experimental and modelling study on the influence of curing temperature (T) and relative humidity (RH) on the compressive strength gain of cement mortars and
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
The build up of heat in a concrete block is caused by the concrete reacting with water. Therefore in order to model the temperature evolution in a concrete block, it is necessary to describe the water content (the moisture) as well as the proportion of cement available to react with the water (this is measured in terms of
All the maturity methods follow the maturity concept i.e. the concrete samples of a given mix possess the same strength if they have the same maturity index. For example, if a concrete sample cured at a temperature of 10°C for 7 days and a sample cured at 27°C for 3 days have the same maturity index, then they gain similar
The concrete formwork process is a critical component of construction project control because failing to gain the necessary concrete strength can lead to reworks and, consequently, project delays and cost overruns during the project’s execution. The goal of this study is to develop a novel method of monitoring the maturity of concrete and
Since the concrete temperature has been at 40 °C, it only took 2,5 hours for it to reach the same maturity of 100 °C-hours. Looking at Graph 3, the temperature is the lowest of the examples at 10 °C, and in this case it will take 10 hours to reach the maturity of 100 °C-hours. Temperature affects how fast the maturity
In this study, maturity was calculated by Equation (1) 14 Days 28 Days; 5: 24: The fundamental concept of maturity is that concrete of the same mix exhibits the same strength, eve n if the curing temperature is different. Therefore, the early-strength-development characteristics can be determined by comparing the maturity according to
maturity functions have been utilized in numerous studies to investigate the maturity index from its corresponding his-tory of temperature recorded [1723–]. The calculation of maturity function was done by experimenting with the con - crete sample specimens with concrete strength and maturity determinations [24, 25] 3 Maturity
