Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Composite concrete admixture as well as preparation method and application thereof
The invention relates to a composite concrete admixture which comprises the following components in parts by weight: 5-8 parts of a polycarboxylate superplasticizer, 6-14 parts of a slow-release polycarboxylate superplasticizer, 3-4.5 parts of a saccharide retarder, 0-0.5 part of an organic acid retarder and 0.5-1 part of an inorganic acid retarder. The retarder disclosed by the invention comprises a saccharide retarder, an organic acid retarder and an inorganic acid retarder which have the effects of inhibiting cement hydration in the early stage, slowing down the hydration speed of cement, reducing the consumption speed of water in concrete and reducing the dosage of a slow-release water reducing agent, wherein the release speed of the slow-release water reducing agent is matched with the hydration speed of the cement. The action effects of the retarders are different, so that the setting time of the concrete is not obviously delayed, and the hydration of the cement can be inhibitedin the early stage.
本发明涉及一种复合型混凝土外加剂，按重量份数计，包括：聚羧酸减水剂5～8份、缓释型聚羧酸减水剂6～14份、糖类缓凝剂3～4.5份、有机酸类缓凝剂0～0.5份、无机酸类缓凝剂0.5～1份。本发明的缓凝剂包括糖类缓凝剂、有机酸类缓凝剂和无机酸类缓凝剂，它们的作用是在早期抑制水泥水化，使水泥的水化速度减缓，降低对混凝土中水的消耗速度，使缓释型减水剂的用量降低，使缓释型减水剂的释放速度与水泥水化速度相匹配。每一种缓凝剂的作用效果各不相同，既不明显延缓混凝土的凝固时间，又能够在早期抑制水泥水化。
Composite concrete admixture as well as preparation method and application thereof
The invention relates to a composite concrete admixture which comprises the following components in parts by weight: 5-8 parts of a polycarboxylate superplasticizer, 6-14 parts of a slow-release polycarboxylate superplasticizer, 3-4.5 parts of a saccharide retarder, 0-0.5 part of an organic acid retarder and 0.5-1 part of an inorganic acid retarder. The retarder disclosed by the invention comprises a saccharide retarder, an organic acid retarder and an inorganic acid retarder which have the effects of inhibiting cement hydration in the early stage, slowing down the hydration speed of cement, reducing the consumption speed of water in concrete and reducing the dosage of a slow-release water reducing agent, wherein the release speed of the slow-release water reducing agent is matched with the hydration speed of the cement. The action effects of the retarders are different, so that the setting time of the concrete is not obviously delayed, and the hydration of the cement can be inhibitedin the early stage.
本发明涉及一种复合型混凝土外加剂，按重量份数计，包括：聚羧酸减水剂5～8份、缓释型聚羧酸减水剂6～14份、糖类缓凝剂3～4.5份、有机酸类缓凝剂0～0.5份、无机酸类缓凝剂0.5～1份。本发明的缓凝剂包括糖类缓凝剂、有机酸类缓凝剂和无机酸类缓凝剂，它们的作用是在早期抑制水泥水化，使水泥的水化速度减缓，降低对混凝土中水的消耗速度，使缓释型减水剂的用量降低，使缓释型减水剂的释放速度与水泥水化速度相匹配。每一种缓凝剂的作用效果各不相同，既不明显延缓混凝土的凝固时间，又能够在早期抑制水泥水化。
Composite concrete admixture as well as preparation method and application thereof
一种复合型混凝土外加剂及其制备方法和用途
ZHU YONGQING (Autor:in) / LI RUIQING (Autor:in) / CHEN YUELONG (Autor:in) / ZOU LIN (Autor:in) / ZHENG BIN (Autor:in) / YANG YANG (Autor:in) / TIAN KUN (Autor:in)
10.11.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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