Understand the grouting material fatigue strength you know? - How do you use the grouting material

grouting material grouting material manufacturers a full range of CGM high-strength non-shrinkage grouting material construction telephone 158 - grouting material manufacturer 3830 - 4411. Everything has a due to its position, whether there is life is lifeless, fatigue degree, grouting material has its fatigue strength, the grouting material fatigue strength, I know you know? Grouting material structure in addition to the static load, but also accept the repeated load. Typical structure contained by the waves of the sea and the wind load of harbour construction, bridge and railway, highway, airport runways pillow rail, these structures in service period may be suffering as much as 10 million times of cyclic loading, sometimes even reach 50 million.             When grouting material aggregate data through must have the failure after repeated load effect, the number of every time and load is less than the static load strength of materials, which attacks on fatigue damage. Grouting material steel products have characteristics of fatigue damage, but the book only touches the exhaustion of grouting material damage. Assume that grouting material specimen endured compressive q1 (separation ≥0） And oh, ≥q1) Alternate effect, then the stress - Strain curve changes with the load repetitions, the strain axis direction from the concave curve ( With hysteresis curve of unloading) Disguised in a straight line, this kind of change (at the rate of decline Not that there are some deformation) of recovery , eventually become toward strain axis concave curve. The back graphic concavity reflects the extent of the damage of concrete near. However, the damage only attack when fatigue limit or accept limit qh a certain limit. If qh below the fatigue limit, although stress and uncertainty Strain curve insist on straight line, but you don't attack fatigue damage. Experts separation endured number must be subjected to cyclic loading is given after compression and axial stress and tensile strength Strain curve. Can be endured must total frequency cyclic loading strain changes can be divided into three period. An initial period 1, the strain to follow will be intention number of cyclic loading and quick to add, but add speed gradually decreasing; 2 during the characterization of safe period, the strain of xuzhou high strength grouting material with intention number must be subjected to cyclic loading and the nearly linear add; Add 3 during the period for the safe, strain rate is also increasing, know fatigue damage attacks. , an example is given to describe the strain. Experts also draw unloading stress - grouting material Strain curve, then to be able to see every where the hysteresis curve of cyclic loading. Area of the curve decreases with each successive load cycle, before eventually fatigue failure and increase. On no failure of the specimen, as if can't see the large difference of grouting materials and cement. In each successive the area of the hysteresis curve of the first, the percentage of the area of the hysteresis curve drawing experts described after different cycles of curve changes in the area, about the above words you of c60 grouting material density grouting material fatigue strength is a new understanding.