scholarly journals An Experimental Study on Relation between compressive strength and Shear Wave velocity for characteristics of coarse aggregate size and type of cement

2011 ◽  
Vol 13 (1) ◽  
pp. 169-175
Author(s):  
Ji-Hwan An ◽  
Sung-IL Jeon ◽  
Jeong-Hee Nam ◽  
Soo-Ahn Kwon
Keyword(s):  
Experimental Study ◽  
Compressive Strength ◽  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Coarse Aggregate ◽  
Aggregate Size

Effect of specimen composition on the strength development in cemented paste backfill

2006 ◽  
Vol 43 (3) ◽  
pp. 310-324 ◽  
Author(s):  
Katherine Klein ◽  
Dragana Simon
Keyword(s):  
Compressive Strength ◽  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Unconfined Compressive Strength ◽  
Pore Fluid ◽  
Strength Development ◽  
Cemented Paste Backfill ◽  
Pore Fluid Chemistry ◽  
Paste Backfill

This paper focuses on monitoring setting and strength development in cemented paste backfill (CPB). The composition of the paste is altered to study the effects of binder type and content, selected chemical admixtures (superplasticizers), mineral additives (e.g., fly ash), and pore fluid chemistry (e.g., ionic concentration and pH) on these properties. The three main techniques utilized are shear wave velocity measurements, penetration tests (e.g., Vicat needle tests), and unconfined compressive strength tests. All of these tests are sensitive to changes in the paste composition. The effect of the pore fluid chemistry and the chemical additives on the CPB properties depends on the ion type and concentration and the chemical composition of the superplasticizers. The shear wave velocity in both uncemented and cemented pastes increases with time as a result of self-weight consolidation, capillary forces, and cementation (the precipitation of ions in uncemented tailings pastes or cement hydration in cemented tailings pastes).Key words: cemented paste backfill, shear wave velocity, setting, unconfined compressive strength.

scholarly journals Evaluating the Dynamic Elastic Modulus of Concrete Using Shear-Wave Velocity Measurements

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Byung Jae Lee ◽  
Seong-Hoon Kee ◽  
Taekeun Oh ◽  
Yun-Yong Kim
Keyword(s):  
Compressive Strength ◽  
Elastic Modulus ◽  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Test Methods ◽  
Standard Test ◽  
Velocity Measurements ◽  
Dynamic Moduli ◽  
The Relationship

The objectives of this study are to investigate the relationship between static and dynamic elastic moduli determined using shear-wave velocity measurements and to demonstrate the practical potential of the shear-wave velocity method for in situ dynamic modulus evaluation. Three hundred 150 by 300 mm concrete cylinders were prepared from three different mixtures with target compressive strengths of 30, 35, and 40 MPa. Static and dynamic tests were performed at 4, 7, 14, and 28 days to evaluate the compressive strength and the static and dynamic moduli of the cylinders. The results obtained from the shear-wave velocity measurements were compared with dynamic moduli obtained from standard test methods (P-wave velocity measurements according to ASTM C597/C597M-16 and fundamental longitudinal and transverse resonance tests according to ASTM C215-14). The shear-wave velocity measured from cylinders showed excellent repeatability with a coefficient of variation (COV) less than 1%, which is as good as that of the standard test methods. The relationship between the dynamic elastic modulus based on shear-wave velocity and the chord elastic modulus according to ASTM C469/C469M was established. Furthermore, the best-fit line for the shear-wave velocity was also demonstrated to be effective for estimating compressive strength using an empirical relationship between compressive strength and static elastic modulus.

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