Chlorine ion in concrete CGM grout material on the effect of reinforcement corrosion CGM grout material is concrete

CGM grout CGM grout material manufacturer CGM grout material price is a kind of strong steel corrosion of chlorine ion factor, standard small distractions can is very strong, the chloride ion from unraveling CGM grout material surface to the reinforced concrete surface strength of grouting material 7 days arrived in c35 and accumulated to the critical concentration, purification of membrane began to damage. Reinforced by cement hydration, alkaline medium would amount to a stable the purification of membrane, but when pH < 11. 5 ShiChunHua membrane began to unstable, pH to 9. 88 the purification of membrane will gradually differentiation. When concrete chloride ion CGM grout material exist, and are in a damp environment, chloride ion will be adsorbed on the membrane surface of steel and purification in the pH fell below 4, so the purification of membrane is damaged. Chloride as catalyst the same seam an agent, to promote the reinforcement corrosion and no waste, the presence of chloride ions together also reinforced ion circuit, accelerated electrochemical corrosion process. According to a lot of experimental research and engineering practice at home and abroad indicate that concentration of chlorine ion in concrete grouting material in 0. 3 to 0. 6 kg/m3 planning in May cause steel corrosion, overstep period corrosion have been more sex. Pure 'critical value' should be 0. 3 to 0. 6 / m3 planning; There are some material proof, reinforced surface chloride ion concentration in 0. 6 ~ 0. 9 kg/m3 planning should be is reinforcement corrosion and expansion period, when arrived at or beyond 1 kg/m3, reinforcement corrosion can expand the grouting of concrete grouting material burst net speak. Generally will be 1 kg/m3 as concrete CGM grout material damage 'threshold', but because of the complexity of the concrete grouting material and environment, the difference of the 'threshold' is not a fixed value, it is with the condition. CGM grout material of concrete durability limit main consideration reinforcement corrosion, defined in the design of the chlorine salt environment, the chloride ion mar arrived in steel surface; In the general environment arrived in carbide steel surface of limit state.