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Super-retarding concrete, super-retarding agent for super-retarding concrete and preparation method of super-retarding agent
The invention discloses super-retarded concrete, a super retarder for the super-retarded concrete and a preparation method of the super-retarded concrete. The super retarder is composed of an amphiphilic polymer, super absorbent resin, calcium nitrate and aluminum sulfate. The amphiphilic polymer forms an adsorption layer on the surfaces of cement particles to block moisture; the super absorbent resin absorbs free water, and the local water cement ratio is reduced; calcium nitrate and aluminum sulfate release ions to inhibit cement hydration. Through the synergistic effect of multiple components, the setting time of the concrete is effectively prolonged by 3-5 times. The obtained super-retarded concrete has super-long flowable time, and the later strength meets the design requirements. During preparation, the super retarder and a concrete mixture are respectively metered and mixed at a discharge port, and the method is simple, convenient and feasible. The super-retarded concrete can be widely applied to large-volume concrete projects such as secant piles, the forming quality can be remarkably improved, the construction period is shortened, and the super-retarded concrete is economical and practical.
本发明公开了一种超缓凝混凝土及其用超缓凝剂与制备方法。所述超缓凝剂由两亲性聚合物、超吸水树脂、硝酸钙和硫酸铝组成。两亲性聚合物在水泥颗粒表面形成吸附层，阻隔水分；超吸水树脂吸收自由水，降低局部水灰比；硝酸钙和硫酸铝释放离子，抑制水泥水化。多组分协同作用，有效延长混凝土凝结时间3～5倍。所得超缓凝混凝土具有超长的可流动时间，后期强度符合设计要求。制备时将超缓凝剂与混凝土拌合物分别计量，出料口混合，简便可行。该超缓凝混凝土可广泛应用于咬合桩等大体积混凝土工程，能显著提高成型质量，节省工期，经济实用。
Super-retarding concrete, super-retarding agent for super-retarding concrete and preparation method of super-retarding agent
The invention discloses super-retarded concrete, a super retarder for the super-retarded concrete and a preparation method of the super-retarded concrete. The super retarder is composed of an amphiphilic polymer, super absorbent resin, calcium nitrate and aluminum sulfate. The amphiphilic polymer forms an adsorption layer on the surfaces of cement particles to block moisture; the super absorbent resin absorbs free water, and the local water cement ratio is reduced; calcium nitrate and aluminum sulfate release ions to inhibit cement hydration. Through the synergistic effect of multiple components, the setting time of the concrete is effectively prolonged by 3-5 times. The obtained super-retarded concrete has super-long flowable time, and the later strength meets the design requirements. During preparation, the super retarder and a concrete mixture are respectively metered and mixed at a discharge port, and the method is simple, convenient and feasible. The super-retarded concrete can be widely applied to large-volume concrete projects such as secant piles, the forming quality can be remarkably improved, the construction period is shortened, and the super-retarded concrete is economical and practical.
本发明公开了一种超缓凝混凝土及其用超缓凝剂与制备方法。所述超缓凝剂由两亲性聚合物、超吸水树脂、硝酸钙和硫酸铝组成。两亲性聚合物在水泥颗粒表面形成吸附层，阻隔水分；超吸水树脂吸收自由水，降低局部水灰比；硝酸钙和硫酸铝释放离子，抑制水泥水化。多组分协同作用，有效延长混凝土凝结时间3～5倍。所得超缓凝混凝土具有超长的可流动时间，后期强度符合设计要求。制备时将超缓凝剂与混凝土拌合物分别计量，出料口混合，简便可行。该超缓凝混凝土可广泛应用于咬合桩等大体积混凝土工程，能显著提高成型质量，节省工期，经济实用。
Super-retarding concrete, super-retarding agent for super-retarding concrete and preparation method of super-retarding agent
一种超缓凝混凝土及其用超缓凝剂与制备方法
TONG FENGHUA (author) / WANG LONG (author) / LI ZHIDONG (author) / ZHU HONGLI (author)
2024-12-10
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME