scholarly journals SHPB Test and Microstructure Analysis on Ready-Mixed Concrete in Uniaxial Load and Passive Confining Pressure States

2019 ◽  
Vol 2019 ◽  
pp. 1-16
Author(s):  
Jing-shuang Zhang ◽  
Xue-lei Duan ◽  
Zi-yan Yang
Keyword(s):  
Water Content ◽  
Storage Period ◽  
Confining Pressure ◽  
Impact Pressure ◽  
Uniaxial Load ◽  
Effect Of Water ◽  
And Storage ◽  
Ready Mixed Concrete ◽  
Pressure State ◽  
Mixed Concrete

Ready-mixed concrete has been used as a support in mine roadways, where the impact load of blasting excavation can cause damage to the concrete support of the roadway. However, limited studies are available on the effect of water content, storage period, and impact pressure on dynamic mechanical properties of ready-mixed concrete in uniaxial load and passive confining pressure states. To investigate the effect of water contents (0%, 1.0%, 1.5%, and 2.0% by mass of dry sand), storage periods (0 d, 3 d, 7 d, 15 d, 20 d, and 30 d), and impact pressures (0.6 MPa and 0.9 MPa) on dynamic mechanical properties of ready-mixed concrete in uniaxial load and passive confining pressure states, the dynamic compression test using split Hopkinson pressure bar (SHPB) has been carried out. In addition, the microscopic test based on the scanning electron microscope (SEM) is conducted to analyze the effect of water content and storage period on the microstructure of ready-mixed concrete. The experimental results show that under the conditions of uniaxial load and passive confining pressure, the dynamic compressive strength of ready-mixed concrete decreases with the increase of water content and storage period but increases with the increase of impact pressure. At the same impact pressure, the dynamic compressive strength in passive confining pressure state is larger than that in uniaxial load state. The dynamic stress-strain curves of ready-mixed concrete in uniaxial load and passive confining pressure states can be divided into three stages: elastic stage, plastic stage, and failure stage. The peak strain increases with increasing impact pressure, and the peak strain in passive confining pressure state is more than that in uniaxial load state. The degree of damage for ready-mixed concrete specimens increases with the increase of the storage period and water content; however, the damage of specimens in passive confining pressure state is less than that of specimens in uniaxial load state. Meanwhile, an analysis to the microstructural mechanism of water content and storage period inside of ready-mixed concrete has been performed.

Investigating the Effect of Water Content in Supercritical CO2as Relevant to the Corrosion of Carbon Capture and Storage Pipelines

CORROSION ◽  
10.5006/0944 ◽  
2014 ◽  
Vol 70 (2) ◽  
pp. 185-195 ◽  
Author(s):  
S. Sim ◽  
F. Bocher ◽  
I.S. Cole ◽  
X.-B. Chen ◽  
N. Birbilis
Keyword(s):  
Water Content ◽  
Carbon Capture ◽  
Carbon Capture And Storage ◽  
Effect Of Water ◽  
And Storage

scholarly journals Effect of washing time and storage of raw Material on Surimi and Kamaboko of Tilapia (Oreochromis sp.)

2020 ◽  
Vol 7 (3) ◽  
pp. 89
Author(s):  
Eka Saputra
Keyword(s):  
Water Content ◽  
Raw Materials ◽  
Frozen Storage ◽  
Storage Period ◽  
Raw Material ◽  
Minced Fish ◽  
Materials Used ◽  
And Storage

This study aim was to determine the effect of washing and raw materials on frozen storage on the quality of surimi and kamaboko from raw material of tilapia (Oreochromis sp). There were three types of raw materials used, namely minced fish, surimi, and surimi with addition of sorbitol, with three washing treatments and four weeks frozen storage period observed every week. The method used consisted of measurements of pH, water content, bite test, and folding test. Then the results obtained for the best kamaboko tilapia (Oreochromis sp) were obtained from fillet raw materials compared to the raw material of Minced fish and raw materials of Minced Fish + Sorbitol, with a frequency of washing once and frozen storage for 3 weeks.

Advanced online water content measurement for self-compacting concrete production in ready-mixed concrete plants

2016 ◽  
Vol 112 ◽  
pp. 570-580 ◽  
Author(s):  
Hai-Thong Ngo ◽  
El-Hadj Kadri ◽  
Abdelhak Kaci ◽  
Tien-Tung Ngo ◽  
Alain Trudel ◽  
...  
Keyword(s):  
Water Content ◽  
Self Compacting Concrete ◽  
Content Measurement ◽  
Concrete Production ◽  
Ready Mixed Concrete ◽  
Mixed Concrete

scholarly journals Characterizing the Effect of Water Content on Small-Strain Shear Modulus of Qiantang Silt

2021 ◽  
Vol 9 (12) ◽  
pp. 1363
Author(s):  
Lisha Zhang ◽  
Shimin Zhang ◽  
Xin Liu ◽  
Yinsuo Sun
Keyword(s):  
Shear Modulus ◽  
Water Content ◽  
Confining Pressure ◽  
Small Strain ◽  
Additional Function ◽  
Small Strain Shear Modulus ◽  
Effect Of Water ◽  
Earth Structures ◽  
Resonant Column Device ◽  
The Impact

Due to the impact of natural and artificial influence, such as waves, tides, and artificial dewatering, the small-strain shear modulus of soils may vary with the water content of soil, causing deformation of excavations and other earth structures. The present study used a resonant column device to investigate the effects of water content, void ratio, and confining pressure on the small-strain shear modulus of a silt extracted from an excavation site near Qiantang River in Hangzhou, China. The test results revealed that the effects of the three factors are not coupled and can be characterized by three individual equations. In particular, the small-strain shear modulus decreases with increasing water content under otherwise similar conditions, which can be characterized by a power function. The classical Hardin’s equation is modified to consider the effect of water content by introducing an additional function of water content.

scholarly journals Actual Condition of Control for Unit Water Content in Ready-Mixed Concrete Factory

2004 ◽  
Vol 42 (12) ◽  
pp. 9-14
Author(s):  
T. Yoshikane ◽  
K. Suzuki ◽  
K. Tsujimoto
Keyword(s):  
Water Content ◽  
Actual Condition ◽  
Ready Mixed Concrete ◽  
Mixed Concrete

Experimental Research on Compressive Strength and Storage Period for Dry-Mixed Material of Shotcrete

2010 ◽  
Vol 168-170 ◽  
pp. 1501-1505
Author(s):  
Jing Shuang Zhang ◽  
Qin Yong Ma ◽  
Xing Teng Han
Keyword(s):  
Compressive Strength ◽  
Water Content ◽  
Experimental Research ◽  
Loss Rate ◽  
Raw Materials ◽  
Engineering Application ◽  
Storage Period ◽  
Strength Loss ◽  
Mix Proportion ◽  
And Storage

According to dry-mixed materials of shotcrete which composed of raw materials in mix proportion the concrete quality as field mixing were included. Through the experimental research on the storage period of using dry-mixed materials in shotcrete, variations of compressive strength were obtained. In according with the studies on the storage period of dry-mixed materials in 7d, 11d, 15d, 20d and 28d, compared with 0d, the loss of compressive strength were obtained under different sand water content (0%, 0.5% and 1.0%). The results shown that strength loss rate of C30 concrete was 6.7% when the sand water content was 0.5% in the 28d and while strength loss rate was 12.0% when the sand water content was 1.0%. The studies on storage period provide supports to the using of dry-mixed shotcrete in engineering application.

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