Study On The Plane Strain Test Of Reinforced Flyash

Since the plan of 12 th Five-Year, our country has been advocating the development of science and green, and pay more attention to the construction of ecological civilization. Fly ash as the discharge of a large quantity of industrial waste residue, not only for our current living environment produced tremendous damage, is a serious threat to the long-term survival of mankind development, urgently requires us to explore new methods and measures to deal with. The recycling of fly ash is not only the need of strengthening ecological construction,but also the embodiment of scientific and technological innovation.The PY-10 type plane strain apparatus, in Xianyang Weihe Power Plant fly ash as the object of study, of the fly ash of different reinforcement number, consolidation confining pressure, initial water ratio, dry density, shear velocity of plane strain tests, tests of fly ash of stress-strain curve, deformation and strength, anti shearing strength parameters such as analysis, Some properties of the fly ash, and the following results are obtained:The PY-10 type plane strain apparatus, of the fly ash of different reinforced layers and different consolidation confining pressure, different water rate and dry density, different shear rate under plane strain test, analysis its stress- strain curves of deformation and strength, and the following conclusions are obtained:(1) Under the plane strain tests of fly ash with different reinforcement quantity, initial water rate, confining pressure, dry density, shear velocity conditions change,(σ1-σ3) to epsilon1 curve showed hardening type. For fly ash of principal stress difference(σ1-σ3) with reinforcement quantity increases, the initial moisture content decreases, confining pressure increases, the dry density increases, the shear velocity increases and increases.(2) Control of initial moisture content, confining pressure, dry density and the shear velocity, reinforced number, arriving at the same of principal stress difference(σ1-σ3) more.Analysis(σ1-σ3)~ε1 data, in the range of the axial deformation, shear stress tends to be stable,reinforced 1 ~ 3 fly ash layer, shear stress increased approximately 5%~20%, indicating that the reinforcement to enhance the strength of fly ash.(3) Control and reinforce number, consolidation confining pressure, dry density and the shear velocity, initial moisture content is smaller, arrived at the same epsilon of principalstress and poor(σ1-σ3) more. The results show that the water content of the fly ash has a weak effect on the shear strength of the fly ash. However, the fly ash is not sensitive to the change of water content, which shows that the fly ash has better water stability.(3) Under the same conditions, the higher the moisture content, the smaller the shear stress when the same axial strain is achieved, the effect of water content on the shear strength of fly ash is reduced. But the fly ash is not sensitive to the change of water content, which shows that the fly ash has good water stability.(4) Control in different experimental variables, confining pressure and dry density is larger, the shear velocity more, at the same axial strain shear stress greater, confining pressure,dry density, shear rate of fly ash strength plays an enhanced role.(5) Analysis of fly ash of shear strength characteristics of known, with the increase in the number of reinforced, fly ash of shear strength parameters cohesion and internal friction angle has a different amplitude increase, indicating that reinforcement of fly ash shear strength to the enhancement of the role. Comparison of the cohesion and internal friction angle increases amplitude shows, cohesion increases amplitude internal friction angle increases substantially,indicating that greater impact on the cohesion of reinforced.