compressive strength of concrete can be properly estimated. Researchers have used these data-driven models in different fields of concrete technologies. Nikoo et al. used self-organization feature map to estimate the compressive strength of concrete and concluded that it is an accurate model for predicting the concrete

Estimation of on-site compressive strength of concrete, The finding that concrete strength in a structure was not correctly described by the strength of specimens moulded ...

Chat NowThe point load strength (I s(50)) is an alternative mechanical parameter to predict the compressive strength of concrete. The scope of this investigation is to develop an empirical equation relating the point load strength and compressive strength of concrete.

Soutsos M.N., Breysse D., Garnier V., Goncalves A., Monteiro A.V. (2012) Estimation of on-site compressive strength of concrete. In: Breysse D. (eds) Non-Destructive Assessment of Concrete Structures: Reliability and Limits of Single and Combined Techniques. RILEM State of the Art Reports, vol 1. Springer, Dordrecht. First Online 22 November 2011...

Chat Now2012-12-13 · Contractors need to know how to correctly evaluate the in-place strength of concrete so they can determine to proper time to remove formwork, backfill or open up a pavement to traffic.

2015-6-5 · A Study on the Estimation of Compressive Strength of Structural Timber using Ultrasonic Pulse International organization of Scientific Research 22 | P a g e V. EXPERIMENTAL RESULTS Compressive strength measurement results of tests are as in Table 1.Compressive strength increase rate...

Chat Now2017-8-27 · 1 ESTIMATION OF CONCRETE COMPRESSIVE STRENGTH BY USING ULTRASONIC PULSE VELOCITIES AND ARTIFICIAL NEURAL NETWORKS Serkan Tapkn a*, Mustafa Tuncan a, Ömer Aröz a, Ahmet Tuncan a, Kambiz Ramyar b a Department of Civil Engineering, Anadolu University, Iki Eylül Campus, 26555, Eski ehir, Turkey b Department of Civil Engineering, Ege University, 35100,

1992-1-1 · In order to calculate the correction factor for any case (that is not included in the shear database), another ANN 1524 S. Jung, K.S. Kim / Engineering Structures 30 (2008) 15151525 (a) Strength ratio vs. concrete compressive strength. (b) Strength ratio vs...

Chat NowA Bayesian statistics approach is presented for combining compressive strength data from cores and nondestructive test data such as pulse velocity and rebound number, as well as subjective data, to estimate the mean compressive strength of concrete in an existing structure.

2018-12-31 · This is because the concrete compressive strength of the MTF25-0.77 specimen was lower than that of the MT30-0.77 specimen and, therefore, resulted in a rather small estimated minimum torsional reinforcement ratio represented in equation ....

Chat Now2017-10-24 · compressive strength of normal and recycled aggregate concrete and equation for compressive strength calculating given in Technical regulation are compared. The accuracies of prediction by experimental data obtained in laboratory as well as by EN 1992-1-1, ACI 209 and SRPS U.M1.048 are compared on the basis of the coefficient of determination.

and that the strength gain due to elevated temperatures is also accelerated. Maturity Concept The compressive strength of concrete increases with time; the temperature at which it is cured also has a major influence. Previous research has shown the most accepted datum temperature to be between 10 and 14 F (-12.2 and -10 C). It is at this tempera...

Chat Now2010-8-4 · mortar compressive strength 3.1 Estimation of mortar compressive strengthFm Mortar strength equation to estimate Fm will determine from the relation between 28-days compressive strength of concrete which didn't mixed foam agent entirely and water-binder ratio with Fig.4 Fm = -2.4(W/B) + 151 (1) Fig.3. Correlation between mortar porosity and

2019-10-12 · Compressive Strength The main measure of the structural quality of concrete is its compressive strength. This property of concrete is commonly considered in structural design. Depending on the mix (especially the water-cement ratio) and time and quality of the curing, compressive strength of concrete can be obtained up to 14,000 psi or more. Commercial production of concrete with ordinary ...

Chat Now2017-1-4 · A number of works have been reported for estimation of compressive strength of the concrete and lots of recent computing techniques are used for better prediction of concrete compressive strengths. Artificial neural networks are used massively for estimating the concrete compressive strength apart from the other computing techniques.

2019-7-31 · Research Article Estimating the Concrete Compressive Strength Using Hard Clustering and Fuzzy Clustering Based Regression Techniques NareshKumarNagwaniandShirishV.Deo National Institute of Technology Raipur, Raipur, Chhattisgarh, India Correspondence should be addressed to Naresh Kumar Nagwani; [email protected]

Chat NowEstimation of concrete strength is an important issue in ready-mixed concrete industry, especially, in proportioning new mixtures and for the quality assurance of the concrete produced. In this article, on the basis of the existing experimental data of compressive strength of normal and recycled aggregate concrete and equation for compressive

ESTIMATION OF THE COMPRESSIVE STRENGTH AND MODULUS OF concrete materials, were used in the test program. strength and elastic modulus of CTAB materials could be expressed in a single equation...

Chat NowA mathematical model for the prediction of compressive strength of high performance concrete was performed using statistical analysis for the concrete data obtained from experimental work done in this study. The multiple non-linear regression model yielded excellent correlation coefficient for the prediction of compressive strength at different ages (3, 7, 14, 28 and 91 days).

2015-11-12 · Mix design of light weight concrete 2. Estimation of the strength development of concrete. Lightweight concrete mix proportioning Step 1.choice of concrete Required compressive strength at 28 days is 24 MPa based on the Arrhenius equation that is used to describe the...

Chat Now2019-1-7 · Effect of aggregate compressive strength on the compressive strength of concrete can be analytically expressed by the De Larrard's equation, which is a modified version of the Féret's equation to be applicable for high strength concrete (Eq.A., Table A). The K factor in the

2013-10-15 · Kim J-K, Han S-H, Lee K-M. Estimation of compressive strength by a new apparent activation energy function. Cem Concr Res 2001;31(2):21725. [12] Tazawa E, Miyazawa S. Effect of constituents and curing condition on autogenous shrinkage of concrete....

Chat NowPowers (1958) proposed a gelspace ratio theory to predict compressive strength of cement paste in concrete engineering. In general, in gelspace ratio theory, the compressive strength of cement paste S(X) is given by gelspace ratio X with the following formula (Sakai et al., 1998, Sakai et al., 2004).

Soutsos M.N., Breysse D., Garnier V., Goncalves A., Monteiro A.V. (2012) Estimation of on-site compressive strength of concrete. In: Breysse D. (eds) Non-Destructive Assessment of Concrete Structures: Reliability and Limits of Single and Combined Techniques. RILEM State of the Art Reports, vol 1. Springer, Dordrecht. First Online 22 November 2011

2016-10-13 · Estimation of the mechanical properties of concrete in an existing structure is possible with the results of surface hardness and ultrasound tests (nondestructive tests (NDTs)). For both the use of correlation curves is necessary, it is established between NDT and the results of the compressive strength of test specimens or extracted from structure.

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