Practice for Estimating Concrete Strength by the Maturity Method

2010 ◽  
Author(s):  
Keyword(s):  
Concrete Strength ◽  
Maturity Method

Prediction of the Strength Development of Fly Ash Concrete

2010 ◽  
Vol 150-151 ◽  
pp. 1026-1033 ◽  
Author(s):  
Ming Hui Liu ◽  
Yuan Feng Wang
Keyword(s):  
Compressive Strength ◽  
Fly Ash ◽  
Concrete Strength ◽  
Strength Development ◽  
Standard Temperature ◽  
Development Models ◽  
Fly Ash Concrete ◽  
Strength Tests ◽  
Maturity Method ◽  
Predicted Model

The effect of fly ash in improving the mechanical properties of concrete is investigated and the existing concrete strength development models are studied. Based on the chemic reactivity properties between fly ash and cement, an appropriate concrete strength model are chosen, and a new model for the fly ash strength factor combing Maturity method is built up and the factors are regressed by existing experimental datum. A total of 24 concretes, including two concretes were produced with two partial fly ash replacement ratios (23.7%, 32.7%). The cubic samples produced from ash fly concrete were demoulded after a day, and cured at standard temperature ( in GB/T 50081-2002) with 100% relative humidity until 28 days, then cured in water. The compressive strength tests were carried out on the cubic specimens at different ages. The compressive strength with time was evaluated by using the new predicted model. It was found that the calculated results by new method are fit the experimental data well.

scholarly journals Application of the maturity method to reinforced concrete roof slabs

2021 ◽  
Vol 26 (4) ◽  
Author(s):  
Roberto Luiz Curra ◽  
Fernanda Pacheco ◽  
Hinoel Zamis Ehrenbring ◽  
Roberto Christ ◽  
Jeferson Ost Patzlaff ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Low Temperature ◽  
Concrete Structure ◽  
Concrete Strength ◽  
Southern Brazil ◽  
Reinforced Concrete Structure ◽  
Industrial Construction ◽  
Maturity Method ◽  
Hardened State

ABSTRACT The maturity method is a procedure that associates the evolution of the temperature of concrete cast to the structure and the evolution of its hardened state properties like compressive strength, usually at early ages. Its use is justified when safety and agility are required for activities like prestressing, shoring removal, demolding and low temperature concrete curing analysis. Temperate regions are known for having lower temperatures during the winter, which can delay concrete strength gains. The aim of this study was to apply the maturity method to a reinforced concrete structure located in Southern Brazil in industrial construction. It was noted that the concrete, despite being expected to reach 30 MPa at 28 days, managed to reach 70% of the strength at 8.5 days for slab 1. Slab 2, whose function was to support garners 4, 5 and 6, presented the data at 4.4 days, it being possible to measure such property using the maturity method.

scholarly journals Complex Maturity Method for Estimating the Concrete Strength Based on Curing Temperature, Ambient Temperature and Relative Humidity

2021 ◽  
Vol 11 (16) ◽  
pp. 7712
Author(s):  
Yelbek Utepov ◽  
Aleksej Aniskin ◽  
Assel Tulebekova ◽  
Aliya Aldungarova ◽  
Shyngys Zharassov ◽  
...  
Keyword(s):  
Relative Humidity ◽  
Ambient Temperature ◽  
Concrete Strength ◽  
Economic Effect ◽  
Curing Temperature ◽  
Coefficient Of Determination ◽  
Complex Method ◽  
Current State ◽  
Maturity Method ◽  
Calibration Dependence

The maturity method is deservedly considered one of the reliable indirect methods for determining the strength at the early stages of concrete curing. The main parameter in the calculation is the internal temperature of concrete that accumulates during the chemical reaction of concrete curing, while external factors such as ambient temperature and relative humidity are fallaciously omitted. In this work, the complex maturity method was developed based on ASTM C1074, accounting for the influence of ambient temperature and relative humidity and coefficients indicating their influence weight. The laboratory testing to measure the concrete strength by compression method and non-destructive sclerometer method were performed on concrete samples according to ASTM C109, GOST 22690, and GOST 10180. According to the calibration dependence of the existing and proposed methods results in comparison with the strength of cubic samples, the highest coefficient of determination R2 = 0.976 was revealed for the complex method of maturity, which indicates its reliability in contrast with sclerometer and traditional maturity methods. The determination of complex maturity allows for an evaluation of the current state of concrete strength, but also reduces the waiting time for concrete curing and increases the economic effect during construction.

Maturity of Prestressed Self-Consolidating Concrete

2013 ◽  
Vol 368-370 ◽  
pp. 945-948
Author(s):  
Wu Jian Long ◽  
Wei Lun Wang ◽  
Feng Xing ◽  
Man Tang Li
Keyword(s):  
Concrete Strength ◽  
Maximum Size ◽  
Fundamental Concept ◽  
Strength Level ◽  
Strength Development ◽  
Mixture Proportioning ◽  
Self Consolidating Concrete ◽  
Maturity Method

The maturity method applies the fundamental concept that concrete strength develops with time as the cement hydrates and releases heat. The rate of strength development at early ages is related to the rate of hydration of cement. In this investigation, 27 Self-consolidating concrete (SCC) mixtures made with various mixture proportioning parameters, including maximum size and type of aggregate, type and content of binder, and w/cm were evaluated. Based on this investigation, SCC proportioned with 0.33 w/cm exhibited lower maturity at the same strength level compared to that with 0.38 w/cm; and for the same 0.38 w/cm, SCC made with Type MS cement had higher maturity compared to those proportioned with Type HE + 20%FA and Type HE + 30%S, at the same strength level.

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