According to GB50003-2001 "masonry structures design" can be seen, the design value of the compressive strength of autoclaved lime sand brick and sintered common brick compressive strength design values ??are the same, the difference is autoclaved sand-lime brick intensity level does not C30; when the span of not less than 7.5m of sand-lime brick masonry under the beam adjustment factor of 0.9, which is the difference between sintered common brick, light brick, construction quality control level when B grade is, GB50003-2001 given steam pressure sand-lime brick design value of shear strength and shear strength of sintered common brick design value, light brick, it is easy to see the shear strength of autoclaved lime sand brick is 0.7 times the sintered common brick. ④ intensity under natural conditions: sand-lime brick autoclaved at high temperatures, the formation of the reaction autoclave. Hydration reaction more fully, it has a stable strength and performance. In the atmosphere of the reactor, there is more growth in the early strength, we will no longer increase, light brick prices remain stable. In wet conditions and long-term immersion in water, light brick okay, intensity will increase. ⑤ temperature resistance: autoclaved sand-lime brick is not prolonged exposure to heat above 200 ℃, less 200 ℃, basically no effect on strength. ⑥ Chemical resistance: MU15 than sand-lime brick strength soaked little change in acid solution.