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Ultralow-dosage composite nano early strength agent and preparation method thereof
The invention provides an ultralow-dosage composite nano early strength agent and a preparation method thereof.The preparation method of the ultralow-dosage composite nano early strength agent comprises the following steps that S1, nano silica sol and silane modified polycarboxylic acid are mixed and stirred, and a suspension A is obtained; s2, adding a calcium source and a dispersing agent into the suspension A, adjusting the pH value to 9-12, and fully stirring to obtain a base material B; s3, dropwise adding a silicon source into the base material B in the S2, shearing and stirring at a high speed, keeping the pH value of a reaction system unchanged, and continuously shearing and stirring at a high speed for 1-2 hours after dropwise adding is finished, so as to obtain the ultralow-dosage composite nano early strength agent. The ultralow-dosage composite nano early strength agent can achieve an excellent early strength effect under the ultralow-dosage condition, and meanwhile, the later strength of concrete can be remarkably improved.
本发明提供一种超低掺量复合纳米早强剂及其制备方法，该超低掺量复合纳米早强剂制备方法，包括以下步骤：S1.将纳米硅溶胶与硅烷改性聚羧酸混合，搅拌，得到悬浮液A；S2.将钙源和分散剂加入悬浮液A中，调节pH至9‑12，充分搅拌，得到底料B；S3.将硅源滴加入S2所述底料B中，高速剪切搅拌，并维持反应体系的pH值不变，滴加结束后，持续高速剪切搅拌1‑2h，即得所述超低掺量复合纳米早强剂。该超低掺量复合纳米早强剂可以实现在超低掺量条件下，具有优异的早强效果，同时可显著提高混凝土的后期强度。
Ultralow-dosage composite nano early strength agent and preparation method thereof
The invention provides an ultralow-dosage composite nano early strength agent and a preparation method thereof.The preparation method of the ultralow-dosage composite nano early strength agent comprises the following steps that S1, nano silica sol and silane modified polycarboxylic acid are mixed and stirred, and a suspension A is obtained; s2, adding a calcium source and a dispersing agent into the suspension A, adjusting the pH value to 9-12, and fully stirring to obtain a base material B; s3, dropwise adding a silicon source into the base material B in the S2, shearing and stirring at a high speed, keeping the pH value of a reaction system unchanged, and continuously shearing and stirring at a high speed for 1-2 hours after dropwise adding is finished, so as to obtain the ultralow-dosage composite nano early strength agent. The ultralow-dosage composite nano early strength agent can achieve an excellent early strength effect under the ultralow-dosage condition, and meanwhile, the later strength of concrete can be remarkably improved.
本发明提供一种超低掺量复合纳米早强剂及其制备方法，该超低掺量复合纳米早强剂制备方法，包括以下步骤：S1.将纳米硅溶胶与硅烷改性聚羧酸混合，搅拌，得到悬浮液A；S2.将钙源和分散剂加入悬浮液A中，调节pH至9‑12，充分搅拌，得到底料B；S3.将硅源滴加入S2所述底料B中，高速剪切搅拌，并维持反应体系的pH值不变，滴加结束后，持续高速剪切搅拌1‑2h，即得所述超低掺量复合纳米早强剂。该超低掺量复合纳米早强剂可以实现在超低掺量条件下，具有优异的早强效果，同时可显著提高混凝土的后期强度。
Ultralow-dosage composite nano early strength agent and preparation method thereof
一种超低掺量复合纳米早强剂及其制备方法
ZHANG JINLONG (author) / TANG MENGXIONG (author) / HU HESONG (author) / ZHONG KAIHONG (author) / ZHONG CONGHAO (author) / HU JIABING (author)
2024-12-27
Patent
Electronic Resource
Chinese
IPC:
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
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