Compressive strength assessment of a moderately corroded box girder

2011 ◽  
Vol 6 (1) ◽  
pp. 27-37 ◽  
Author(s):  
S. Saad-Eldeen ◽  
Y. Garbatov ◽  
C. Guedes Soares
Keyword(s):  
Compressive Strength ◽  
Box Girder ◽  
Strength Assessment

PENGKAJIAN KEKUATAN BETON STRUKTUR JEMBATAN PASCA KEBAKARAN

2013 ◽  
Vol 12 (3) ◽  
Author(s):  
Sudarmadi Sudarmadi
Keyword(s):  
Compressive Strength ◽  
Concrete Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Strength Assessment ◽  
Concrete Testing

In this paper a case study about concrete strength assessment of bridge structure experiencing fire is discussed. Assessment methods include activities of visual inspection, concrete testing by Hammer Test, Ultrasonic Pulse Velocity Test, and Core Test. Then, test results are compared with the requirement of RSNI T-12-2004. Test results show that surface concrete at the location of fire deteriorates so that its quality is decreased into the category of Very Poor with ultrasonic pulse velocity ranges between 1,14 – 1,74 km/s. From test results also it can be known that concrete compressive strength of inner part of bridge pier ranges about 267 – 274 kg/cm2 and concrete compressive strength of beam and plate experiencing fire directly is about 173 kg/cm2 and 159 kg/cm2. It can be concluded that surface concrete strength at the location of fire does not meet the requirement of RSNI T-12-2004. So, repair on surface concrete of pier, beam, and plate at the location of fire is required.

scholarly journals In Situ Strength Assessment of Concrete using Maturity Method

2019 ◽  
Vol 9 (2) ◽  
pp. 1398-1401
Keyword(s):  
Compressive Strength ◽  
Modern Method ◽  
Maturity Index ◽  
Cold Weather ◽  
Strength Assessment ◽  
Concrete Mix Design ◽  
Maturity Method ◽  
Concrete Maturity ◽  
Best Fit

There is a necessity for a modern method to evaluate the insitu strength of concrete thereby increasing the rate of productivity in concrete industry. This method can address immediate challenges faced such as predicting right time for formwork removal, post-tensioning, at low temperatures while the strength gain of concrete is hindered, optimizing concrete mix design and cold weather protection. The temperature is measured using wireless sensor that offers a simple solution to concrete maturity monitoring. The temperature and humidity on various days is observed. The compressive strength at 1,3,7,14 and 28 day is observed. This paper includes calculation of maturity index using Nurse-Saul equation. A graph is plot between maturity index and compressive strength. The best fit strength-maturity equation is chosen based upon the obtained curve and thereby the in-situ strength of concrete is evaluated.

Proposition of a New Conformity Criterion for the Assessment of the Concrete Compressive Strength

2017 ◽  
Vol 259 ◽  
pp. 106-110
Author(s):  
Elżbieta Szczygielska ◽  
Viktar V. Tur
Keyword(s):  
Monte Carlo Simulation ◽  
Compressive Strength ◽  
Monte Carlo ◽  
Standard Deviation ◽  
Probability Density Function ◽  
Concrete Strength ◽  
Test Results ◽  
Concrete Compressive Strength ◽  
Strength Assessment ◽  
Probability Density Function Pdf

A new conformity criterion for concrete strength assessment that could be used at the initial production stage, is proposed. As an innovative conformity criterion was evaluated based on Order Statistics Theory, it is independent from the type probability density function (PDF) in population, estimation of the standard deviation, shape of the specimen and the level of autocorrelation of the test results. Proposed criterion was evaluated and positively verified both AOQL-concept using Monte Carlo simulation and the test results obtained under real production.

Compressive Strength Assessment of Geopolymer Composites by a Phenomenological Model

2009 ◽  
Vol 29 (6) ◽  
pp. 840-854 ◽  
Author(s):  
Radhakrishna ◽  
A. Shashishankar ◽  
B.C. Udayashankar ◽  
M.V. Renuka Devi
Keyword(s):  
Compressive Strength ◽  
Phenomenological Model ◽  
Strength Assessment ◽  
Geopolymer Composites

scholarly journals Compressive Strength Assessment using GGBS and Randomly Distributed Fibers in Concrete

2019 ◽  
Vol 9 (2) ◽  
pp. 1078-1086
Keyword(s):  
Compressive Strength ◽  
Reinforced Concrete ◽  
Cement Content ◽  
Construction Material ◽  
Fiber Reinforced Concrete ◽  
Fiber Reinforced ◽  
Strength Assessment ◽  
Compressive Strength Of Concrete ◽  
By Products

India is producing enormous amounts of industrial by-products out of which 150 million tonnes of GGBS itself. Apart from disposal of this solid waste, engineers strive for its value addition through its use as a construction material for achieving better economy, eco-friendliness without compromising on technical aspects. In this study, varieties of concrete are mixed with GGBS as a replacement material for cement to understand its compressive strength and long term behaviour. It is seen from literature that the fibers enhance the performance of concrete. Accordingly, six trials were made with GGBS replacement along with variation of cement content, water cement ratio and steel fibers with aspect ratio 60 and variation in reinforcing indices. The workability of concrete increased with increasing the GGBS content and also observed there is a reduction in workability in fiber reinforced concrete. The results indicated that the concrete made with GGBS indicates the strength comparable to the concrete made with OPC for all replacement levels. There is a substantial decrease in strength at 80% replacement. While there is a substantial increase in long-term strength. The compressive strength of GGBS concrete was increased up to 19% than that of OPC concrete and also observed 5 to 12% strength increased in fiber reinforced concrete than GGBS concrete. For this purpose studied the compressive strength of concrete at the ages of 3, 7,28,56,90 and 180 days.

Compressive strength assessment of fibre composites based on a defect severity model

2019 ◽  
Vol 181 ◽  
pp. 107685 ◽  
Author(s):  
D. Wilhelmsson ◽  
R. Talreja ◽  
R. Gutkin ◽  
L.E. Asp
Keyword(s):  
Compressive Strength ◽  
Strength Assessment ◽  
Fibre Composites

Potential use of small-diameter concrete cores for in situ compressive strength assessment

2019 ◽  
Vol 71 (15) ◽  
pp. 809-826
Author(s):  
Mayssaa El-Moussaoui ◽  
Ravindra K. Dhir ◽  
Peter Robery
Keyword(s):  
Compressive Strength ◽  
Small Diameter ◽  
Strength Assessment ◽  
Potential Use
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