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Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent
The invention discloses a soil sacrificial agent for a polycarboxylate superplasticizer and a preparation method of the soil sacrificial agent. The preparation method of the soil sacrificial agent forthe polycarboxylate superplasticizer comprises the following steps: (1) in a protective atmosphere, mixing and stirring styrene and ethanol, conducting heating to 40-45 DEG C, adding an initiator A in batches, simultaneously adding acrylic acid and methallyl alcohol for reaction, conducting heating to 88-92 DEG C after the reaction, and removing redundant ethanol and water to obtain an intermediate product; and (2) adding an initiator B into the intermediate product obtained in the step (1), conducting stirring and heating to 90-95 DEG C, adding ethylene oxide for reaction, adding water for dilution after the reaction is finished, and adjusting the pH value of the system to 5-7. The soil sacrificial agent can effectively inhibit soil from gradually absorbing water and expanding, so that the water demand of concrete is reduced, the problems of quick concrete loss and large pump loss are solved, and the problems of cracking, low strength, poor durability and the like after the concreteis hardened are further solved.
本发明公开了一种用于聚羧酸减水剂的泥土牺牲剂及其制备方法。所述用于聚羧酸减水剂的泥土牺牲剂的制备方法，包括如下步骤：(1)在保护气氛下，将苯乙烯和乙醇混合搅拌，升温到40～45℃并分批加入引发剂A，同时加入丙烯酸和甲基烯丙醇进行反应，反应后升温到88～92℃，将多余的乙醇和水分除去后得中间产物；(2)将引发剂B加入到步骤(1)所述中间产物中，搅拌并升温到90～95℃，加入环氧乙烷进行反应，反应结束后加水稀释，调节体系pH＝5～7即可。本发明所述泥土牺牲剂能有效抑制泥土逐渐吸水膨胀，从而降低混凝土的需水量而改善混凝土损失快、泵损大问题，进一步改善混凝土硬化后开裂、强度低、耐久性差等问题。
Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent
The invention discloses a soil sacrificial agent for a polycarboxylate superplasticizer and a preparation method of the soil sacrificial agent. The preparation method of the soil sacrificial agent forthe polycarboxylate superplasticizer comprises the following steps: (1) in a protective atmosphere, mixing and stirring styrene and ethanol, conducting heating to 40-45 DEG C, adding an initiator A in batches, simultaneously adding acrylic acid and methallyl alcohol for reaction, conducting heating to 88-92 DEG C after the reaction, and removing redundant ethanol and water to obtain an intermediate product; and (2) adding an initiator B into the intermediate product obtained in the step (1), conducting stirring and heating to 90-95 DEG C, adding ethylene oxide for reaction, adding water for dilution after the reaction is finished, and adjusting the pH value of the system to 5-7. The soil sacrificial agent can effectively inhibit soil from gradually absorbing water and expanding, so that the water demand of concrete is reduced, the problems of quick concrete loss and large pump loss are solved, and the problems of cracking, low strength, poor durability and the like after the concreteis hardened are further solved.
本发明公开了一种用于聚羧酸减水剂的泥土牺牲剂及其制备方法。所述用于聚羧酸减水剂的泥土牺牲剂的制备方法，包括如下步骤：(1)在保护气氛下，将苯乙烯和乙醇混合搅拌，升温到40～45℃并分批加入引发剂A，同时加入丙烯酸和甲基烯丙醇进行反应，反应后升温到88～92℃，将多余的乙醇和水分除去后得中间产物；(2)将引发剂B加入到步骤(1)所述中间产物中，搅拌并升温到90～95℃，加入环氧乙烷进行反应，反应结束后加水稀释，调节体系pH＝5～7即可。本发明所述泥土牺牲剂能有效抑制泥土逐渐吸水膨胀，从而降低混凝土的需水量而改善混凝土损失快、泵损大问题，进一步改善混凝土硬化后开裂、强度低、耐久性差等问题。
Soil sacrificial agent for polycarboxylate superplasticizer and preparation method of soil sacrificial agent
一种用于聚羧酸减水剂的泥土牺牲剂及其制备方法
ZHAO LIANGUO (author) / LI CAI (author) / JIANG YUANHUA (author) / ZHAO KUI (author) / PAN YUJIE (author) / FAN LONG (author) / ZHANG SHENGNAN (author) / SUO XIMEI (author) / WANG YANG (author)
2021-01-26
Patent
Electronic Resource
Chinese
IPC:
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
/
C04B
Kalk
,
LIME
/
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
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