As a result,based on the traditional technology,ultra high -strength concrete with compressive strength and flexural strength were up to 145.6MPa and 26.68MPa respectively,while the compressive strength and flexural strength of RPC adding with 6% steel fiber were up to 201.3MPa and 73.67MPa respectively.
The mass segregation derived from centrifugation was hindered with the 50vol% slurries. Cell wall had high green density(63.4%) and sintered density(98.8%). When the porosity of final products increased from 75.6% to 83.2%,their compressive strength decreases from 3.2MPa to 1.78MPa.
5 groups of SFLWC specimens with different steel fiber volumes fraction of 0, 0.5%,1.0%,1.5% and 2.0% were tested to investigate the effect of steel fiber content on static mechanical properties and impact resistance of lightweight aggregate concrete. The static mechanical properties include cubic compressive strength,prismatic compressive strength,splitting tensile strength,first-crack flexural strength,flexural strength,modulus of elasticity,flexural modulus and flexural toughness,etc.
Its bending strengty is 132 MPa,shock strength is 3.62kJ/m2,thermal stability,no crack after durable porcelain at 200℃ was threw into water at 20℃,The major technical indexes surpass the best in the same kind of products in China.
Adding 15% ZrO 2 and 15% ZrO 2+22% SiCu to Al 2O 3/TiC ceramic material,got bending strengty and fracture toughness of ATE and ATZS complex material are increased by a factor of 2 times compared with Al 2O 3/TiC matrix material and the data separately are up to 989 MPa,10 96 MPam 1/2 and 1094 MPa,11 26 MPam 1/2 .Through observation to fracture surface and microstructure of this material used of SER and TEM,the result states the tougening mechanism of ATZ and ATZS complex material is ZrO 2 phase toughened and the interface striped.
The compressive strength of the composite is higher than that of the PLA scaffold.
Fracture energy of Mode I (opening mode) for the Ordinary and Low-Heat Concrete is compared and examined according to experimental variables, such as water-cement ratio, compressive strength and age.
In the depressed front regions (bubbles), the medium probably exhibits a certain densification and the resulting compressive strength hinders the bubble growth in the initial stage of instability development.
Compressive strength exhibited the similar behavior with density.
Research results show that there is a negative linear relationship between the Si 2p and Al 2p binding energies of Al-Si materials and the compressive strength of aluminosilicate based cementitious materials prepared with these Al-Si materials, i.e.
Both sectorphotometer and microphotometer analyses were carried out on the Hg spectrum transmitted by papers popularly used as window materials in Chinese homes. The intensity distribution of transmitted radiation, after normal incidence, through samples of nine different kinds of paper have been studied, and the total transmission calculated for various wavelengths.
Minute amount of sulfur dioxide and impurities are always present in the air of industrial area. Under sunlight, smog is formed, scattering light and reducing visibility. This article is to ascertain the effect of rate of photochemical oxidation of sulfur dioxide in air at high relative humidities.
This paper presents a discussion on the causes of low capacity of the chamber process of sulfuric acid manufacturing. The authors have suggested several principal methods for increasing the capacity of the process.