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A platform for research: civil engineering, architecture and urbanism
Nano C-S-H-PCE early strength agent and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a nano C-S-H-PCE early strength agent and a preparation method thereof. The preparation method comprises the following steps: S100, adding a siliceous solution into an aqueous solution of a polycarboxylate superplasticizer A, and fully mixing to obtain a base material; s200, the calcium solution is added into the base material for a reaction, and nano C-S-H-PCE early strength agent suspension liquid is prepared; wherein the polycarboxylate superplasticizer A is prepared by copolymerizing a quaternary ammonium salt cationic monomer with terminal double bonds, a polyether monomer and unsaturated carboxylic acid. According to the preparation method, the nano C-S-H-PCE early strength agent suspension is subjected to normal-pressure drying at a relatively low temperature to obtain the powdery nano C-S-H-PCE early strength agent which is not hardened, is homogeneous and has good stability, so that the production cost is remarkably reduced; the prepared early strength agent can significantly improve the early compressive strength of concrete at a relatively low mixing amount, and has no adverse effect on the later strength performance of the concrete; the preparation raw materials are wide in source and low in price, and large-scale production is facilitated to rapidly realize industrialization.
本发明涉及混凝土外加剂技术领域，特别涉及一种纳米C‑S‑H‑PCE早强剂及其制备方法。该制备方法包括以下步骤：S100、将硅质溶液加入聚羧酸减水剂A的水溶液中充分混合，得到底料；S200、再将钙质溶液加入底料中进行反应，以制得纳米C‑S‑H‑PCE早强剂悬浮液；其中，聚羧酸减水剂A由具有末端双键的季铵盐类阳离子单体、聚醚单体以及不饱和羧酸共聚制得。本发明在较低温度下对纳米C‑S‑H‑PCE早强剂悬浮液进行常压烘干即可获得不板结的、均质的且稳定性好的粉末状纳米C‑S‑H‑PCE早强剂，从而显著降低生产成本；制得的早强剂在较低掺量下便可显著提高混凝土的早期抗压强度，且对混凝土后期强度性能无不良影响；其制备原材料来源广泛且价格廉价，便于大批量生产以迅速实现产业化。
Nano C-S-H-PCE early strength agent and preparation method thereof
The invention relates to the technical field of concrete admixtures, in particular to a nano C-S-H-PCE early strength agent and a preparation method thereof. The preparation method comprises the following steps: S100, adding a siliceous solution into an aqueous solution of a polycarboxylate superplasticizer A, and fully mixing to obtain a base material; s200, the calcium solution is added into the base material for a reaction, and nano C-S-H-PCE early strength agent suspension liquid is prepared; wherein the polycarboxylate superplasticizer A is prepared by copolymerizing a quaternary ammonium salt cationic monomer with terminal double bonds, a polyether monomer and unsaturated carboxylic acid. According to the preparation method, the nano C-S-H-PCE early strength agent suspension is subjected to normal-pressure drying at a relatively low temperature to obtain the powdery nano C-S-H-PCE early strength agent which is not hardened, is homogeneous and has good stability, so that the production cost is remarkably reduced; the prepared early strength agent can significantly improve the early compressive strength of concrete at a relatively low mixing amount, and has no adverse effect on the later strength performance of the concrete; the preparation raw materials are wide in source and low in price, and large-scale production is facilitated to rapidly realize industrialization.
本发明涉及混凝土外加剂技术领域，特别涉及一种纳米C‑S‑H‑PCE早强剂及其制备方法。该制备方法包括以下步骤：S100、将硅质溶液加入聚羧酸减水剂A的水溶液中充分混合，得到底料；S200、再将钙质溶液加入底料中进行反应，以制得纳米C‑S‑H‑PCE早强剂悬浮液；其中，聚羧酸减水剂A由具有末端双键的季铵盐类阳离子单体、聚醚单体以及不饱和羧酸共聚制得。本发明在较低温度下对纳米C‑S‑H‑PCE早强剂悬浮液进行常压烘干即可获得不板结的、均质的且稳定性好的粉末状纳米C‑S‑H‑PCE早强剂，从而显著降低生产成本；制得的早强剂在较低掺量下便可显著提高混凝土的早期抗压强度，且对混凝土后期强度性能无不良影响；其制备原材料来源广泛且价格廉价，便于大批量生产以迅速实现产业化。
Nano C-S-H-PCE early strength agent and preparation method thereof
一种纳米C-S-H-PCE早强剂及其制备方法
HUANG WEI (author) / FANG YUNHUI (author) / ZHONG CONGHAO (author) / LIN YANMEI (author)
2022-10-18
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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