Experimental Research On Property For Crack Resistance Of The Cement-based Polymer Concrete

Cracks in construction are an engineering technical problem, which has confused us for a long time. In recent years, with the more use of new technology and materials, the problem of crack is booming. It has affected people's life and the production, so it should be solved as soon as possible. Although the structural design is established on ultimate strength criteria, usage standard of most projects is controlled by crack. The achievement of modern building material research showed the cracks in construction are inevitable. Factors influence crack in constructions are very many and complicated. In view of different reasons cracks form, there are lots of measures about its remediation and preventive measure in engineering. But researches from improving material component to enhance the property for crack resistance of concrete are very few.Mixed with appropriate amount of polymer, distortion ability of concrete enhances efficiently. The research about this aspect has already attracted the scholars'attention. Though it has been put forward for many years, the polymer concrete was only used in the areas of leakage prevention and reparation etc. Mainly there are two reasons about this: Firstly, the adding of polymer weakens intensity and the rigidity of the concrete; Secondly, the polymer is expensive as usual, its adding certainly will result in increasing in cost of the construction. This paper attempts to alleviate the construction between the distortion and the intensity of polymer concrete by changing the quantity of polymer to prepare cement-based polymer concrete with great deformation and strength reduced little. Surrounding this goal, the primary contention of this research outspreads from several aspects as follows:1,Study mechanics performance of the cement mortar and concrete with different amount of the polymer, discuss its dynamic elastic modulus, compressive strength and damping ratio, expect for the property for crack resistance.2,Probe into the function mechanism when adding the polymer into the concrete. 3,Take the cast-in-site concrete slab as the example , study crack resistance of the based-cement polymer concrete by testing.4,The static responses of the normal concrete structure and the based-cement polymer concrete were simulated by using ANSYS.The test result indicated that the proper quantity polymer can improve remarkably distortion ability, but weaken the degree of the intensity and the rigidity of concrete a little. Using based-cement polymer concrete in structure can enhance the cost of construction, but embarking from the long term angle, its maintenance and the patching expense is less than the plain concrete wants; Therefore, using the based-cement polymer concrete material in cast-in-site concrete slab is effective.