Research on the dynamic compressive test of highly fluidized geopolymer concrete

In order to further improve the mechanical properties of Ti-Al3Ti laminated composites, the endothermic semisolid reaction was used to fabricate Ti-Al3Ti-Al laminated composites, and the quasi-static compressive test, dynamic compressive test, and the ballistic penetration test were conducted on these composites. The results showed that the compressive strength and failure strain of Ti-Al3Ti-Al laminated composites prepared at 660°C are 1432 MPa and 35%, respectively. The dynamic response of these composites has obvious strain rate effect, and the crack grows in the shape of “Z.” The V50 of Ti-Al3Ti-Al targets is 509 m s−1. To sum up, Ti-Al3Ti-Al laminated composites have better mechanical properties and anti-penetration properties compared to Ti-Al3Ti laminated composites.

Download Full-text

Interpretation of cryogenic-temperature Charpy fracture initiation and propagation energies by microstructural evolution occurring during dynamic compressive test of austenitic Fe–(0.4,1.0)C–18Mn steels

Materials Science and Engineering A ◽

10.1016/j.msea.2015.05.095 ◽

2015 ◽

Vol 641 ◽

pp. 340-347 ◽

Cited By ~ 15

Author(s):

Hyunmin Kim ◽

Jaeyoung Park ◽

Joong Eun Jung ◽

Seok Su Sohn ◽

Sunghak Lee

Keyword(s):

Microstructural Evolution ◽

Cryogenic Temperature ◽

Fracture Initiation ◽

Compressive Test ◽

Initiation And Propagation ◽

Dynamic Compressive Test

Download Full-text

Dynamic Compressive Test of Gas-Containing Coal Using a Modified Split Hopkinson Pressure Bar System

Rock Mechanics and Rock Engineering ◽

10.1007/s00603-019-01955-w ◽

2019 ◽

Vol 53 (2) ◽

pp. 815-829 ◽

Cited By ~ 20

Author(s):

Zhiqiang Yin ◽

Wensu Chen ◽

Hong Hao ◽

Jucai Chang ◽

Guangming Zhao ◽

...

Keyword(s):

Split Hopkinson Pressure Bar ◽

Hopkinson Pressure Bar ◽

Compressive Test ◽

Split Hopkinson ◽

Pressure Bar ◽

Dynamic Compressive Test

Download Full-text

Experimental Study of the Compressive Strengths of Basalt Fiber-Reinforced Concrete after Various High-Temperature Treatments and Cooling in Open Air and Water

Applied Sciences ◽

10.3390/app11188729 ◽

2021 ◽

Vol 11 (18) ◽

pp. 8729

Author(s):

Huaming An ◽

Yushan Song ◽

Lei Liu ◽

Xiang Meng

Keyword(s):

Reinforced Concrete ◽

Loading Rate ◽

Basalt Fiber ◽

Fiber Reinforced Concrete ◽

Physical Parameters ◽

Fiber Reinforced ◽

Compressive Test ◽

Ordinary Concrete ◽

Dynamic Compressive Test ◽

Cooling Methods

The rapid development of modern society has increased the demand for high-performance geo-materials. As an advanced cementitious composite, fiber-reinforced concrete has attracted much attention and has been widely applied to various buildings and civil infrastructure. A basalt fiber-reinforced concrete is proposed as an advanced geo-material and the mechanical and thermal properties were investigated in this study. The basalt fiber-reinforced concrete was compared with ordinary concrete to confirm its superiority by determination of the physical parameters, static compressive test, and dynamic compressive test. The static compressive test was performed using the YAW-2000C constant stress pressure experimental machine under different heating temperatures and cooling methods, while the dynamic compressive test was performed using the 75-mm split-Hopkinson pressure bar under different loading rates, heating temperatures, and cooling methods. For the basic physical parameters, it was found that the mass loss and wave velocity of concrete decrease with the increase of the temperature. In the static compressive test, the static compressive strength for both the ordinary concrete and the fiber-reinforced concrete decreased with the increase of the temperature, and greater strength was observed with the air-cooled compared to the water-cooled method. It was found that the strength of basalt fiber-reinforced concrete is greater than that of ordinary concrete. In the dynamic compressive test, the strength increased with an increasing loading rate and descended with an increasing temperature, while for the same heating temperature and loading rate, water cooling produced more irregular and smaller fragments than air cooling. The dynamic compressive strength of basalt fiber-reinforced concrete was bigger than that of ordinary concrete.

Download Full-text

Dynamic Compressive Test for Determining Stress-Strain Relation of Material

Transactions of the Japan Society of Mechanical Engineers ◽

10.1299/kikai1938.37.875 ◽

1971 ◽

Vol 37 (297) ◽

pp. 875-882

Author(s):

Keizo KISHIDA ◽

Kanae SENDA

Keyword(s):

Compressive Test ◽

Stress Strain ◽

Strain Relation ◽

Stress Strain Relation ◽

Dynamic Compressive Test

Download Full-text

The Influence of Alkali Activator Concentration to Mechanical Properties of Geopolymer Concrete with Trass as a Filler

Materials Science Forum ◽

10.4028/www.scientific.net/msf.803.125 ◽

2014 ◽

Vol 803 ◽

pp. 125-134 ◽

Cited By ~ 12

Author(s):

Puput Risdanareni ◽

Januarti Jaya Ekaputri ◽

Triwulan

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Raw Materials ◽

Geopolymer Concrete ◽

Test Results ◽

Activator Concentration ◽

Compressive Test ◽

Volcanic Material ◽

Alkali Activator ◽

Factors Influencing

This paper describes one of the varying factors influencing the mechanical properties of geopolymer concrete. Fly ash and volcanic material called trass was used as raw materials, while sodium Hydroxide (NaOH) and Sodium silicate (Na2SiO3) was applied as an alkali activator. Mechanical properties were assessed by compressive test, the concentration of NaOH used in this study was eight and ten Molars, and ratio of Na2SiO3to NaOH by mass was 0.5, 1, 1.5, 2, and 2.5. Test results indicated that the strength of geopolymer concrete and binder were hardly influenced by concentration of NaOH in solution and the activator ratio. Binder with activator ratio of 2.5 has the highest compressive strength both in 8M and 10M NaOH system. However, in concrete, there are a few difference, concretes made with 8M NaOH and activators ratio of 2 have the highest compressive strength. This result might due to the low workability of fresh geopolymer concrete. On the other hand, binder and concrete made with 10M NaOH, showed the highest compressive strength when they were made with the activator ratio of 2,5.

Download Full-text