A fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, preparation method and application

Abstract

The invention provides a fast-setting adjustable cement-based underwater anti-dispersion ultra-fast hard grouting material, a preparation method and an application thereof, including component A: 80% to 90% of cementitious material, 3% to 3% of active admixture 10%, expansion agent 3% ~ 7%, high performance underwater anti-dispersion agent 2% ~ 3%, polycarboxylate high performance water reducer 0.1% ~ 0.3%; B component: rapid hardening cementitious material 80% ~ 90%, active admixture 4% ~ 10%, expansion agent 3% ~ 7%, high performance underwater anti-dispersion agent 2% ~ 3%, polycarboxylate high performance water reducer 0.1% ~ 0.3%, retarder 0.1% to 0.2% of the agent, 0.1% to 0.2% of the early strength agent, 0.1% to 0.15% of the thixotropic agent, and 0.05% to 0.1% of the interface wetting agent. The single liquid of A and B components of the present invention has a long working time, fast coagulation and hardening speed after mixing, high strength, and good underwater dispersion resistance. The ratio of A and B components can be adjusted, and the coagulation time can be adjusted.

Description

technical field [0001] The invention belongs to the technical field of preparation of underwater rapid repair grouting material, and in particular relates to a quick-setting and adjustable cement-based underwater anti-dispersion ultra-fast hardening grouting material, a preparation method and an application. Background technique [0002] With the vigorous development of domestic highways, railways, water conservancy and hydropower, rail transit and other fields of engineering construction, more and more tunnels and underground projects will encounter rock cracking and water seepage during operation. Taking the railway tunnel as an example, the smoothness of the line needs to be strictly controlled during its operation to ensure the safety of the driving line. However, due to factors such as complex geological structure, unstable rock structure, groundwater, and driving vibration, railway tunnels are prone to ballast bed settlement during operation, which in turn leads to det...

AI Technical Summary

Problems solved by technology

This material needs to have the characteristics of underwater dispersion resistance and ultra-fast hardening and high strength. It is easy to cause the grout to harden and block the pipe and block the warehouse during the grouting process. It is difficult to clean the grouting equipment after an abnormality occurs, which will further reduce the available construction time during the skylight period

[0005] In the patent 201110347875.5 published on June 20, 2012, a super early strength grouting material for repairing ballastless track structure of high-speed railway was proposed. The early strength is high, but there is no underwater dispersion resistance, and the slurry is easily washed away by the mud in the cavity during underwater grouting repairs, so it is not suitable for underwater grouting repairs in tunnels where the ballast bed is empty and settled

In the patent 201310169894.2 published on August 28, 2013, the underwater non-dispersible fast-setting inorganic grouting material and its preparation method were proposed. The fastest initial setting time of the material embodiment is 185min, and the final setting is 320min, 24h The compressive strength is 15MPa, which is difficult to meet the traffic demand after repairing the skylight period of the railway tunnel

Moreover, the grouting repair construction has occupied most of the skylight period, and the final setting time of 92 minutes after the completion of the construction is too long, and it is also difficult to meet the driving conditions

[0006] To sum up, the grouting repair materials in the prior art are difficult to meet the needs of rapid repair projects under water when the track bed of the railway tunnel is voided and settled.

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