Research On The Durability Of Self-Compacting Rubberised Concrete

Abstratct:The useness of Rubber aggregate in concrete field is an important way to deal with waste tires, while it also have significant influence on concrete material properties. Therefore, waste tire crumb rubber modified concrete materials have been paid more and more attention. In this thesis, influence of rubber particles on the durability of self-compacting concrete are studied systematically, such as rate of absorption of water, resistance to chloride, resistance to carbonation and resistance to sulfate attack, based on the domestic and foreign related research.This paper uses the method of comparative analysis, designs different rubber set of self-compacting concrete and vibrating compacting concrete aggregate, investigates the stress strain curves, workability and mechanical strength of SCRC; through the capillary water absorption test, chloride ion penetration test, carbonation, sulfate solution immersion, half immersion and dry wet cycling test, studies the influence of rubber aggregates to self-compacting concrete’s properties such as capillary absorption, resistance to chloride ion permeability, carbonation and sulfate resistance. Research shows that crumb rubber can not only improve the self-compacting concrete peak strain and toughness, but also can effectively reduce the self-compacting concrete capillary absorption, enhance its resistance to chloride ion penetration and sulfate resistance under immersion and half submerged conditions; But rubber aggregate have different degrees of deterioration effects on SCC’s carbonation resistance and sulfate resistance under cyclic wet-dry condition; However, compared to the same conditions of rubber aggregate compacted concrete, SCRC has more excellent durability. Picture No.44, table.23, reference.85.