Experiment Research On Cast-in-Place Concrete Slab's Non-Loaded Cracks

This thesis set forth its position on cast-in-place R.C. slab's cracks while pointing out the important meaning on research slab's non-loaded cracks. Through flat experiment and circle experiment, we research the causes of cracks before hardening of concrete and after. Through ingredient experiment, we research the influence of shrinkage from some ingredient(coal ash, crushed stones and fiber ). In addition, we test some methods of construction to strengthen the anti-crack capacity of R.C.slab in building sites.On the basis of experiments and integration of theory with practice, the thesis put forward some propose on reducing R.C.slab's non-loaded cracks...