Super slump concrete admixture and preparation method thereof and a kind of super slump concrete

Abstract

The application relates to the field of concrete admixtures, and specifically discloses a slump-preserving concrete admixture, a preparation method thereof, and a super-slump-preserving concrete. A super-slump concrete admixture, comprising the following raw materials in parts by weight: 10-30 parts of amino-terminated methoxy polyethylene glycol, 15-10 parts of methoxy polyethylene glycol, and 50-80 parts of polymethacrylic acid , 20-40 parts of aliphatic hydroxy acid, its preparation method is: take amino-terminated methoxy polyethylene glycol, methoxy polyethylene glycol, polymethacrylic acid and aliphatic hydroxy acid by weighing formula quantity, stir together mixed, heated to 100-110°C for 2-3 hours, and dried to obtain the ultra-slump concrete admixture, adding the super-slump concrete admixture of the present application to the concrete to obtain commercial concrete, which is transported in a high-temperature environment It still has good slump retention performance.

Description

technical field [0001] The present application relates to the field of concrete admixtures, and more particularly, to a super-slump-preserving concrete admixture and a preparation method thereof, and a super-slump-preserving concrete. Background technique [0002] Additives with different effects can be added to ready-mixed concrete to make ready-mixed concrete with different characteristics. The ready-mixed concrete is first mixed and then transported to different locations for construction. Therefore, due to the uncertainty of transportation time and ambient temperature, the market has higher requirements on the slump retention of commercial concrete. [0003] In the related art, the patent with the publication number of CN103553490B discloses a high slump-retaining concrete and its preparation method and application. It is used in combination with silica gel powder and a water-reducing agent, and the silica gel powder adsorbs the water-reducing agent so that the water-red...

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Problems solved by technology

[0003] In the related technology, the patent with the notification number CN103553490B discloses a high slump-resisting concrete and its preparation method and application. It is used through the compounding of silica gel powder and water reducer, and the silica gel powder absorbs the water reducer so that the water reducer can achieve slowing down. However, in the high temperature transportation environment, the hydration rate of cement in commercial concrete is faster, the viscosity of commercial concrete increases sharply, and it is difficult for the water reducing agent to release from the silica gel , cannot play an effective role in slump protection

[0004] The common way to maintain the slump of commercial concrete in the market is to add polycarboxylate superplasticizers in batches during the mixing process of ready-mixed concrete, but polycarboxylate superplasticizers are sensitive to temperature. The slump loss of commercial concrete mixed with polycarboxylate superplasticizer increases sharply, so it is difficult for this method to play a better slump protection effect at high temperature

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