Influence of coarse aggregate type on the damage mechanism in high‐strength concrete under compressive fatigue loading

2019 ◽  
Vol 20 (4) ◽  
pp. 1212-1219 ◽  
Author(s):  
Tim Scheiden ◽  
Nadja Oneschkow
Keyword(s):  
High Strength Concrete ◽  
Coarse Aggregate ◽  
High Strength ◽  
Fatigue Loading ◽  
Damage Mechanism ◽  
Strength Concrete

Estimation of Compressive Strength of Recycled Aggregate High Strength Concrete Using Ultrasonic Pulse Velocity

2014 ◽  
Vol 605 ◽  
pp. 147-150
Author(s):  
Seong Uk Hong ◽  
Seung Hun Kim ◽  
Yong Taeg Lee
Keyword(s):  
Compressive Strength ◽  
High Strength Concrete ◽  
Coarse Aggregate ◽  
High Strength ◽  
Ultrasonic Pulse Velocity ◽  
Ultrasonic Pulse ◽  
Pulse Velocity ◽  
Recycled Aggregate ◽  
Strength Concrete ◽  
Recycled Coarse Aggregate

This study used the ultrasonic pulse velocity method, one of the non-destructive test methods that does not damage the building for maintenance of to-be-constructed concrete structures using recycled aggregates in order to estimate the compressive strength of high strength concrete structure using recycled coarse aggregate and provide elementary resources for technological establishment of ultrasonic pulse velocity method. 200 test pieces of high strength concrete 40, 50MPa using recycled coarse aggregate were manufactured by replacement rates (0, 30, 50, 100%) and age (1, 7, 28, 180days), and air curing was executed to measure compressive strength and wave velocity. As the result of compressive strength measurement, the one with age of 180day and design strength of 40MPa was 43.69MPa, recycled coarse aggregate replacement rate of 30% 50% 100% were 42.82, 41.22, 37.35MPa, and 50MPa was 52.50MPa, recycled coarse aggregate replacement rate of 30% 50% 100% were 49.02, 46.66, 45.30MPa, and while it could be seen that the test piece substituted with recycled aggregate was found to have lower strength than the test piece with natural aggregate only, but it still reached the design strength to a degree. The correlation of compressive strength and ultrasonic pulse velocity was found and regression analysis was conducted. The estimation formula for compressive strength of high strength concrete using recycled coarse aggregate was found to be Fc=0.069Vp4.05, R2=0.66

The Possibility of Using Boiler Slag as Coarse Aggregate in High Strength Concrete

2017 ◽  
Vol 22 (5) ◽  
pp. 1816-1826 ◽  
Author(s):  
Piotr Smarzewski ◽  
Danuta Barnat-Hunek ◽  
Walery Jezierski
Keyword(s):  
High Strength Concrete ◽  
Coarse Aggregate ◽  
High Strength ◽  
Strength Concrete

Study on the Workability of High Strength Concrete with the Grading of Coarse Aggregate Skeleton Structure

2011 ◽  
Vol 261-263 ◽  
pp. 411-415
Author(s):  
Er Bu Tian ◽  
Feng Chao Wang ◽  
Ren Wei Zhang ◽  
Tao Ji
Keyword(s):  
High Strength Concrete ◽  
Coarse Aggregate ◽  
Concrete Strength ◽  
Uniform Design ◽  
Steel Slag ◽  
High Strength ◽  
Mineral Admixtures ◽  
Strength Concrete ◽  
Sand Surface ◽  
Skeleton Structure

People often use superplasticizer and mineral admixtures (such as steel slag, slag, etc.) to increase the density of concrete and improve concrete strength, but don’t use coarse aggregate gradding. The paper selects the coarse aggregate of skeleton structure from several grading concept, and uses Uniform Design to test high strength concrete workability, and analyses results. It is shown from the results that the method of Uniform Design can significantly reduce the workload, and concrete mixture slump increases linearly with the water-cement ratio and sand percentage, but decreases linearly with steel slag addition, and the water released from the flocculation of cement by superplasticizer can increase the slump, and most of water plays the role of lubricant before it reacts with cement, and the effect of slump that sand extends coarse aggregate skeleton are greater than that sand surface area increases.

Development and some Prospects of the Shaft Lining Structure

2012 ◽  
Vol 166-169 ◽  
pp. 636-639
Author(s):  
Lin Lin Wu ◽  
Yong Guang Lian ◽  
Yong Xiang Kong ◽  
Yong Jun Ma ◽  
Bin Jiang ◽  
...  
Keyword(s):  
High Strength Concrete ◽  
Steel Plate ◽  
High Strength ◽  
Damage Mechanism ◽  
Strength Concrete ◽  
Advantages And Disadvantages ◽  
Composite Shaft ◽  
Lining Structure ◽  
Shaft Lining

The damage mechanism and causes of the shaft lining structures are introduced, and the advantages and disadvantages of some current shaft lining structures are analyzed. The prospects of steel plate-high strength concrete composite shaft lining structure are proposed in this paper.

Coupled Effect of Coarse Aggregate Type and Silica Fume on Creep Coefficients of High-Strength Concrete

2016 ◽  
Vol 28 (12) ◽  
pp. 04016159 ◽  
Author(s):  
Ahmed B. Shuraim ◽  
Fahid Aslam ◽  
Raja Rizwan Hussain ◽  
Abdulrahman M. Alhozaimy
Keyword(s):  
Silica Fume ◽  
High Strength Concrete ◽  
Coarse Aggregate ◽  
High Strength ◽  
Strength Concrete ◽  
Coupled Effect

scholarly journals Development of Ultra High Strength Concrete Using Silica Fume and its Mechanical & Durability Properties - Experimental Investigation

2021 ◽  
Author(s):  
Sathyakumar N ◽  
Arun M ◽  
Arunachalam N
Keyword(s):  
Experimental Investigation ◽  
Flexural Strength ◽  
Silica Fume ◽  
High Strength Concrete ◽  
Coarse Aggregate ◽  
High Strength ◽  
Chloride Penetration ◽  
Fine Aggregate ◽  
Strength Concrete ◽  
Super Plasticizer

Abstract This experimental investigation is aimed to develop an ultra-high strength concrete with minimum of 100 MPa as compressive strength.In order to obtain this, twenty different concrete mixes have been tried, using cement, river sand, coarse aggregate, water, silica fume and super plasticizer. During the preparation of trial mixes of concrete, the water / binder ratio of 0.2, silica fume of 10% to the weight of cement, super plasticizer of 10 litres per cubic metre of concrete and coarse aggregate of 1000 kg/m3 were kept as constant. The amount of cement content (as 600-, 650-, 700-, 750- and 800 kg/m3) and the fine aggregate content (as 500-, 600-, 700- and 800 kg/m3) was varied. Totally 300 specimens were cast and tested in this investigation.The100 x 100 x 100 mm size of cubes, 150 x 300 mm size of cylinders, 100 x 100 x 500 mm size of prisms, 100 x 200 mm size of cylinders, 60 x 100 mm size of cylinders were used to test compressive, split tensile, flexural strength, chloride penetration and water penetration tests respectively at the age of 7-, 14- and 28 days. Based on the test results, a suitable mix proportion to produce an ultra-high strength concrete has been identified. Subsequently, from this investigation, the maximum cube compressive strength of 130 MPa, split tensile strength of 6.94 MPa, flexural strength of 21.39 MPa, chloride penetration 36 Coulombs which is lesser than 100 and sorptivity coefficient valueof 0.582 has been achieved.

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