Poor-quality surrounding rock concrete wet-spraying method
A technology of surrounding rock and inferior quality, which is applied in the field of shotcrete surrounding rock of roadway and wet shotcrete of inferior surrounding rock, can solve the problems of poor supporting effect of dry shotcrete, and achieve good integrity and cohesion, stable performance, spraying fast effect
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[0018] Example one:
[0019] The method of wet spraying concrete for inferior surrounding rock includes the following steps:
[0020] The stones and sand are sieved with a special standard sieve for stones and a special standard sieve for sand respectively, and then the cement, stones and sand are mixed by the batching machine according to the mass ratio of 1:1.5:3;
[0021] The prepared mixture is transported to the mixer by explosion-proof transporter;
[0022] In the mixer, add water in a ratio of 0.4:1 to the cement mass ratio, and stir to obtain concrete. Add water-reducing agent and hydrating agent to the concrete. The amount of water-reducing agent added is 0.8% of the cement mass. Hydrating agent The added amount is 0.3% of the cement quality, the water reducing agent is RHEOPLUS 26 water reducing agent, and the hydrating agent is Delvo hydrating agent;
[0023] Use explosion-proof tanker to transport the concrete to the wet spraying machine located in the well;
[0024] At ...
Example Embodiment
[0025] Embodiment two:
[0026] The method of wet spraying concrete for inferior surrounding rock includes the following steps:
[0027] The stones and sand are sieved with a special standard sieve for stones and a special standard sieve for sand respectively, and then the cement, stones and sand are mixed by the batching machine at a mass ratio of 1:2:1.5;
[0028] The prepared mixture is transported to the mixer by explosion-proof transporter;
[0029] In the mixer, add water in a ratio of 0.5:1 to the cement mass ratio, stir to obtain concrete, add water-reducing agent and hydrating agent to the concrete, the amount of water-reducing agent added is 1% of the cement mass, hydrating agent The added amount is 1% of the cement quality, the water reducing agent is RHEOPLUS 26 water reducing agent, and the hydrating agent is Delvo hydrating agent;
[0030] Use explosion-proof tanker to transport the concrete to the wet spraying machine located in the well;
[0031] At the nozzle of the wet...
Example Embodiment
[0032] Embodiment three:
[0033] The method of wet spraying concrete for inferior surrounding rock includes the following steps:
[0034] The stones and sand are sieved with a special standard sieve for stones and a special standard sieve for sand respectively, and then the cement, stones and sand are mixed by the batching machine according to the mass ratio of 1:3:2;
[0035] The prepared mixture is transported to the mixer by explosion-proof transporter;
[0036] In the mixer, add water in a ratio of 0.43:1 to the cement mass ratio, stir to obtain concrete, add water-reducing agent and hydrating agent to the concrete, the addition amount of water-reducing agent is 0.85% of the cement quality, hydrating agent The added amount is 1.5% of the cement quality, the water reducing agent is RHEOPLUS 26 water reducing agent, and the hydrating agent is Delvo hydrating agent;
[0037] Use explosion-proof tanker to transport the concrete to the wet spraying machine located in the well;
[0038] ...
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