Study On Mechanical Properties Of Rubber And Polymer Latex Modified Shale Ceramic Grain Concrete

Based on the analysis of modified shale ceramic grain concrete, this thesis attempts to find a method for how to decrease the static elastic modulus of concrete and to increase the toughness of concrete. As is seen in experiments, the static elastic modulus and compressive strength decrease a lot on condition that rubber was only used to modified shale ceramic grain concrete. When the static elastic modulus reaches 12700Mpa, its compressive strength is as slow as 14.7Mpa. The E/C ratio (Elastic modulus / Compressive strength) is as high as 860. Additionally, the regress model of the fact that strength decreases with rubber increasing was given. Apparently, How to reduce the static elastic modulus further in terms of keeping relative high compressive strength has become a remarkable problem confronted us. That is to say, the E/C ratio should be reduced via modifying measures. Finally, polymer latex was applied to modify lightweight concrete, It's found that polymer latex can reduce inner pores of concrete, enlarge its density, enhance its compressive strength from modifying results. This conclusion had be testified through polymer modified rubberized lightweight concrete experiment. When compressive strength hits 18.2Mpa after modifying, its elastic modulus is as low as 10200Mpa.E/C ratio falls down to 560.Basic conclusions have been draw via single factor ceramic grain concrete experiment. For example, there exists a high elastic modulus area with the sand rate changing. So this area should be avoided for lowering the concrete elastic modulus. Besides, the law of the fact that the mechanical properties of the concrete reduce steadily with the quantity of rubber increasing can be seen from rubberized shale ceramic grain concrete results. Moreover, polymer latex can decrease concrete's inner pores, formulate co-continuous networks, enlarge concrete's density, raise its compressive strength. At last, orthogonal experiment is designed to test the concrete mechanical properties, and results which are analyzed with statistical theory show that rubber is the main factor which influences mechanical properties significantly.After all, this thesis studies on the modification mechanism of shale ceramic grain concrete, discuses the interface joint effect between aggregates and cement mortar from micro-hardness, analyses mechanical stance with finite element method when this tough concrete is applied in pavement. And conclude that the vertical stress lessens gradually; strain grows steadily with the static elastic modulus reducing. This concrete will relieve the bad riding comfort of rigid road-vehicle interaction inevitably.