Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Super-retarded concrete and preparation method thereof
The invention relates to the field of concrete, and particularly discloses super-retarded concrete and a preparation method thereof. The super-retarded concrete is prepared from a concrete mixture, and the concrete mixture comprises water, Portland cement, fly ash, sand, gravel, a water reducing agent, fibers, a retarder, 1-hydroxyethylidene-1, 1-diphosphonic acid and polyvinylpyrrolidone. The preparation method comprises the following steps: 1) uniformly mixing the water, the Portland cement, the 1-hydroxyethylidene-1, 1-diphosphonic acid and the polyvinylpyrrolidone; (2) adding the water reducing agent, the retarder, the fly ash, the sand and the gravel, and uniformly mixing; (3) adding fibers and uniformly mixing the fibers and the concrete mixture to obtain a concrete mixture; (4) injecting the concrete mixture into a mold and tamping the concrete mixture; and (5) maintaining and demolding the concrete to obtain the super-retarded concrete. The super-retarded concrete has the advantage that the later strength is kept at a high level, and in addition, the preparation method has the advantage that the subsequent hydration reaction is more sufficient.
本申请涉及混凝土领域，具体公开了一种超缓凝混凝土及其制备方法。超缓凝混凝土由混凝土拌和料制备而成，混凝土拌和料包括：水、硅酸盐水泥、粉煤灰、砂、碎石、减水剂、纤维、缓凝剂、羟基乙叉二膦酸、聚乙烯吡咯烷酮；其制备方法为：步骤1），将水、硅酸盐水泥、羟基乙叉二膦酸、聚乙烯吡咯烷酮混合均匀；步骤2），加入减水剂、缓凝剂、粉煤灰、砂、碎石，混合均匀；步骤3），加入纤维，混合均匀获得混凝土拌和料；步骤4），将混凝土拌和料注入模具中，捣实；步骤5），保养、脱模，获得超缓凝混凝土。本申请的超缓凝混凝土具有后期强度保持较高水平的优点；另外，本申请的制备方法具有后续的水化反应更为充分的优点。
Super-retarded concrete and preparation method thereof
The invention relates to the field of concrete, and particularly discloses super-retarded concrete and a preparation method thereof. The super-retarded concrete is prepared from a concrete mixture, and the concrete mixture comprises water, Portland cement, fly ash, sand, gravel, a water reducing agent, fibers, a retarder, 1-hydroxyethylidene-1, 1-diphosphonic acid and polyvinylpyrrolidone. The preparation method comprises the following steps: 1) uniformly mixing the water, the Portland cement, the 1-hydroxyethylidene-1, 1-diphosphonic acid and the polyvinylpyrrolidone; (2) adding the water reducing agent, the retarder, the fly ash, the sand and the gravel, and uniformly mixing; (3) adding fibers and uniformly mixing the fibers and the concrete mixture to obtain a concrete mixture; (4) injecting the concrete mixture into a mold and tamping the concrete mixture; and (5) maintaining and demolding the concrete to obtain the super-retarded concrete. The super-retarded concrete has the advantage that the later strength is kept at a high level, and in addition, the preparation method has the advantage that the subsequent hydration reaction is more sufficient.
本申请涉及混凝土领域，具体公开了一种超缓凝混凝土及其制备方法。超缓凝混凝土由混凝土拌和料制备而成，混凝土拌和料包括：水、硅酸盐水泥、粉煤灰、砂、碎石、减水剂、纤维、缓凝剂、羟基乙叉二膦酸、聚乙烯吡咯烷酮；其制备方法为：步骤1），将水、硅酸盐水泥、羟基乙叉二膦酸、聚乙烯吡咯烷酮混合均匀；步骤2），加入减水剂、缓凝剂、粉煤灰、砂、碎石，混合均匀；步骤3），加入纤维，混合均匀获得混凝土拌和料；步骤4），将混凝土拌和料注入模具中，捣实；步骤5），保养、脱模，获得超缓凝混凝土。本申请的超缓凝混凝土具有后期强度保持较高水平的优点；另外，本申请的制备方法具有后续的水化反应更为充分的优点。
Super-retarded concrete and preparation method thereof
一种超缓凝混凝土及其制备方法
XIAO WEIRONG (Autor:in) / ZHONG SHIBANG (Autor:in) / LI HENGFANG (Autor:in)
30.07.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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