Pumping impervious super-set-retarding concrete and preparation method thereof

Abstract

The invention discloses pumping impervious super-set-retarding concrete. The pumping impervious super-set-retarding concrete is prepared from, by weight, 1 part of cement, 1-2 parts of mineral powder,2-3 parts of medium sand, 3-4 parts of gravel, 0.6-0.7 part of water and 0.02-0.03 part of super-set-retarding pumping agent. A preparation method of the super-set-retarding pumping agent includes the steps that dodecylbenzene sulfonic acid and ammonia gas react in an organic solvent, after obtained reaction liquid of bis-dodecyl benzenesulfonimide is neutralized with alkaline matter, static layering is carried out, organic phases are removed, obtained water phases are concentrated and dried, and the pumping impervious super-set-retarding concrete is obtained. The alkaline matter is one of potassium hydroxide, sodium hydroxide, potassium carbonate and sodium carbonate. The newly-developed super-set-retarding concrete replaces an existing common set-retarding pumping agent, the set-retarding time initial set of the concrete is longer than 65 hours, the final set is shorter than 80 hours, later strength is achieved, and the strength of 28 d is qualified.

Description

technical field [0001] The invention relates to building materials, in particular to a pumping anti-seepage super retarded concrete and a preparation method thereof. Background technique [0002] In the hot summer mass concrete construction and bored occlusal pile projects, a large amount of concrete is poured continuously. For example, in some projects, it is required that the pile body concrete of the bored piles that have been poured in the previous stage be able to Carry out a proper amount of drilling, so that the subsequent construction of the drilled pile and the pre-constructed bored pile can be integrated into a whole. In response to these special needs in the construction, the setting time of the concrete is required to be extended to more than 60h, and the later stage of the concrete cannot be affected. In order to meet the requirements of this kind of construction technology, ordinary retarding admixtures can no longer meet the requirements when concrete is mixed...

AI Technical Summary

Problems solved by technology

[0002] In the hot summer mass concrete construction and bored occlusal pile projects, a large amount of concrete is poured continuously. For example, in some projects, it is required that the pile body concrete of the bored piles that have been poured in the previous stage be able to Carry out a proper amount of drilling, so that the subsequent construction of the drilled pile and the pre-constructed bored pile can be integrated into a whole. In response to these special needs in the construction, the setting time of the concrete is required to be extended to more than 60h, and the later stage of the concrete cannot be affected. In order to meet the requirements of this type of construction technology, ordinary retarding admixtures can no longer meet the requirements when concrete is mixed.

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