Strength Assessment of Concrete Cubes Containing Variable

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Strength Assessment of Concrete Cubes Containing Variable ...

2016-10-18  The present research highlights the compressive strength behavior of concrete cubes containing granite dust as a fine aggregate associated with variable mixtures of Portland cement. The three stages of working methods have been applied in the present research work, like- (i) collection of samples from the field, (ii) grain size analysis, and ...

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Strength Assessment of Concrete Cubes Containing

320 Md. Rafiqul Islam et al.: Strength Assessment of Concrete Cubes Containing Variable Mixtures of Portland Cement and Granite Dust of the Maddhapara Mine,

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(PDF) Strength Assessment of Concrete Cubes Containing ...

2016-10-18  The present research highlights the compressive strength behavior of concrete cubes containing granite dust as a fine aggregate associated with variable m

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Assessment of the current acceptance criteria for concrete ...

In this paper, an assessment of the current two acceptance criterion of the Egyptian code for concrete compressive strength as tested by standard cubes was conducted. Actual determination of the ...

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Concrete Strength Assessment Sandberg

BS 6089:2010, ‘Assessment of in-situ compressive strength in structures and precast concrete components. Complementary guidance to that given in BS EN 13791′ Between them, they cover both direct (cores) and indirect (Rebound Hammer to measure surface hardness, Ultrasonic Pulse Velocity (UPV) of the concrete, Pull out strength) methods for ...

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Compressive strength assessment of recycled aggregate ...

2019-11-10  Compressive strength assessment of recycled aggregate concrete using Schmidt rebound hammer and core testing ... it seems that the estimated compressive strength by two-variable equation is more reliable than that of either the Schmidt hammer or the core testing. ... Properties of pervious concrete containing recycled concrete block aggregate ...

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Strength assessment of concrete with waste glass and ...

2020-6-1  The highest tensile strength attained is 2.37 for 0% (control) and the lowest split tensile strength attained is 1.64 for 20% waste glass and bankoro replacement . It can be observed that the addition of waste glass and bankoro led to a decrease in the split tensile strength of the concrete cubes.

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On-site strength assessment of limestone based concrete ...

2017-9-1  For rehabilitation of existing concrete structures, knowing the strength of the different elements is mandatory. Assessment of the compressive strength of ‘old’ structures can be performed by (i) destructive testing of drilled cores in varying amounts and (ii) calibrated indirect methods by combining destructive core drilling with non- or semi-destructive techniques.

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Reliability of core test – Critical assessment and ...

2014-3-1  3.1. Current Egyptian Code (2008)/standard and British Code (2003) According to these codes, the estimated in-situ concrete cube strength (f cu) may be calculated from the measured compressive strength of core (f core) according to the following expression: (1) f cu = (F l / d) (F Reinf.) f core where the factors (F l / d) and (F Reinf.) account for the effect of l/d and the presence of ...

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The effect of porosity on the strength of foamed concrete ...

2002-2-1  More details relating to the materials used and casting procedure can be found in the previous publications , .. 3.1.1. Compressive strength. The compressive strength of foamed concrete was determined from 100-mm cubes, which were cast in steel moulds, demoulded after 24±2 h, wrapped in polythene and kept in a constant temperature room at 22±2 °C up to the day of testing.

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Compressive Strength Assessment of Concrete

2021-8-11  accelerated cement hydration together causes an early increase of strength in mortar and concrete. Besides, the shrinkage of concrete containing MK as cement replacement (up to 15%) is less than concrete without MK [1-22]. To date, many studies have been accomplished which pointed to the increase of compressive strength (fc) in the concrete or

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ASSESSMENT OF CONCRETE COMPRESSIVE STRENGTH

ultrasonic pulse velocity and the concrete compressive strength. The program involves testing of concrete cubes and prisms cast with specified test variables. The variables are the age of concrete, density of concrete, salt content in fine aggregate, water cement ratio, type of ultrasonic test and curing method (normal and high pressure stream

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In-situ compressive strength assessment of concrete in ...

2020-12-3  A low standard deviation means that most strength results will be close to the mean value; a high standard deviation means that the strength of significant proportions of the results will be well below (and above) the mean value .. As per GoN: Ministry of Physical Planning and Works , the concrete to be used in footings, columns, beams and slabs, etc. shall have a minimum crushing strength of ...

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Compressive Strength of Concrete -Cube Test, Procedure ...

Procedure: Compressive Strength Test of Concrete Cubes. For cube test two types of specimens either cubes of 15cm X 15cm X 15cm or 10cm X 10cm x 10cm depending upon the size of aggregate are used. For most of the works cubical molds of size 15cm x 15cm x 15cm are commonly used.

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On-site strength assessment of limestone based concrete ...

2017-9-1  For rehabilitation of existing concrete structures, knowing the strength of the different elements is mandatory. Assessment of the compressive strength of ‘old’ structures can be performed by (i) destructive testing of drilled cores in varying amounts and (ii) calibrated indirect methods by combining destructive core drilling with non- or semi-destructive techniques.

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(PDF) Strength And Durability assessment Of Bacteria Based ...

Concrete cubes with and without addition of bacteria were tested and it is observed that there is an improvement in the compressive strength for the cubes with the addition of bacteria.

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EN 206 Conformity Testing for Concrete Strength in

Keywords: Cube, Concrete, Conformity, Cylinder, Strength, Sustainability. 1.0 INTRODUCTION BS EN 206 [1] adopts only 150mm diameter by 300mm length cylinders or 150mm cubes as standard specimens for determining compressive strength of concrete. Both BS EN 1992-1-1 [2] and BS EN 206 [1] provide for equivalent cube compressive strength

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5 Methods for On-Site Evaluation of Concrete Strength ...

2 天前  On-site evaluation of concrete strength is a challenge in the assessment of existing structures. Combination of NDT methods can be used to measure strength.

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Non destructive testing for determining the strength of ...

2021-8-13  It has been observed that results of eqn. 1 are almost similar to the actual crushing strength of concrete cubes. Similarly to obtain a relation for determining the compressive strength of concrete through UPV a graph shown in fig. 6 has been plotted between the Velocity (V) from UPV (m/s) and the Actual Compressive Strength

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Multiple Regression Model for Compressive Strength ...

A 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).

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Strength Assessment of Concrete Structures

2014-4-29  Techniques for Strength Assessment •Core testing represents the most reliable method of establishing in-situ concrete strength. •Core-drilling is relatively ‘destructive’ by reason that it left a hole in the structure. •Other ‘partially-destructive’ techniques for assessing strength of surface concrete are

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Interpretation of in-situ concrete strength test results

2009-4-23  Figure 2: Characteristic strength estimates of in-situ concrete. The values used for Figure 1 and 2 to obtain the strength correlation, are the mean compressive strengths of cubes taken from the same batch of concrete. A margin to allow for production variability was taken as: based on 5% defectives and an estimated standard deviation of 8 N/mm

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Strength and Durability Assessment of Concrete with Fine ...

2021-7-20  Strength and Durability Assessment of Concrete with Fine Aggregate Replaced by Copper Slag. Gopika Krishnan P1, Husna M S2, Neethu N S3, Sreelekshmi M S4, Kiran C J5. Department of Civil Engineering Government Engineering College, Barton Hill. Thiruvananthapuram, India

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CASE STUDIES ON APPLYING BEST PRACTICE TO IN-SITU

2005-8-7  strength assessment of concrete on site (see back cover) highlights the merits of a quick and simple test for determining the in-situ concrete strength. Based on the work completed at Cardington, the guide recommends the use of pull-out inserts cast into the concrete to determine the early age strength for purposes such as early striking and ...

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5 Methods for On-Site Evaluation of Concrete Strength ...

2 天前  On-site evaluation of concrete strength is a challenge in the assessment of existing structures. Combination of NDT methods can be used to measure strength.

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Concrete Compressive Strength Data Set

Concrete Compressive Strength Data Set. Download: Data Folder, Data Set Description. Abstract: Concrete is the most important material in civil engineering. The concrete compressive strength is a highly nonlinear function of age and ingredients. Data Set Characteristics: Multivariate. Number of Instances: 1030. Area:

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Non destructive testing for determining the strength of ...

2021-8-13  It has been observed that results of eqn. 1 are almost similar to the actual crushing strength of concrete cubes. Similarly to obtain a relation for determining the compressive strength of concrete through UPV a graph shown in fig. 6 has been plotted between the Velocity (V) from UPV (m/s) and the Actual Compressive Strength

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[PDF] ADAPTIVE NEURO-FUZZY INFERENCE SYSTEM AND

In the current study two methods are evaluated for predicting the compressive strength of concrete containing metakaolin. Adaptive neuro-fuzzy inference system (ANFIS) model and stepwise regression (SR) model are developed as a reliable modeling method for simulating and predicting the compressive strength of concrete containing metakaolin at the different ages.

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Effect of Calcium Chloride on the Compressive Strength of ...

2015-4-7  Cubes produced from the concrete were cured for 7, 14, 21 and 28 days respectively. The mean densities of the concrete cubes made from the three brands of cement with and without admixture were computed. The corresponding mean compressive strength for the concrete cubes

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EFFECTS OF TEMPERATURE ON CONRETE

2016-5-19  strength for 80 MPa mix exposed to 60°C for 72hrs. According to Ghani; the effect of low and high temperature on various properties of concrete was investigated. The properties investigated were modulus of rupture of concrete beams, compressive strength and tensile strength of concrete. Three different temperatures were used for this purpose.

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