Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Phase change expansion anti-cracking agent for concrete and preparation method of phase change expansion anti-cracking agent
The invention relates to a phase-change expansion anti-cracking agent for concrete and a preparation method thereof, and the preparation method comprises the following steps: heating polyethylene glycol to a molten state, adding a mixed expansion agent into the molten state, uniformly mixing, adding graphite-phase carbon nitride, uniformly mixing, putting the mixed material into a vacuum drying oven, and carrying out vacuum adsorption, so as to obtain the phase-change expansion anti-cracking agent for concrete. The polyethylene glycol and the mixed expanding agent are adsorbed in the porous structure of the graphite phase carbon nitride, so that the phase change expansion anti-cracking agent for the concrete is prepared. Wherein the mass percentage ratio of the polyethylene glycol to the mixed expanding agent to the graphite phase carbon nitride is (35-49.5%): (49.5-60%): (1-5%). Different active expanding agents are compounded to form the mixed expanding agent, the calcium expanding agent is high in activity and hydration rate and mainly compensates for early-stage shrinkage of the concrete, meanwhile, M-type and S-type MgO expanding agents with different activities are added, shrinkage of the concrete in the middle and later stages is compensated, and therefore compensation shrinkage of the concrete in all stages is guaranteed, and the concrete quality is improved. And the cracking risk of the concrete is reduced.
本发明涉及一种混凝土用相变膨胀抗裂剂及其制备方法，上述制备方法包括如下步骤：将聚乙二醇加热至熔融态，向其中加入混合膨胀剂，混合均匀，再加入石墨相氮化碳，混合均匀，将混合物料放入真空干燥箱进行真空吸附，以使聚乙二醇及混合膨胀剂吸附于石墨相氮化碳的多孔结构中，从而制得一种混凝土用相变膨胀抗裂剂；其中，聚乙二醇、混合膨胀剂及石墨相氮化碳的质量百分比为(35～49.5％):(49.5～60％):(1～5％)。本发明中利用不同活性膨胀剂复配形成混合膨胀剂，钙质膨胀剂的活性较高，水化速率较快，主要补偿混凝土早期的收缩，同时加入M型和S型不同活性的MgO膨胀剂，补偿了混凝土中后期的收缩，从而保证对混凝土各个阶段的补偿收缩，降低了混凝土的开裂风险。
Phase change expansion anti-cracking agent for concrete and preparation method of phase change expansion anti-cracking agent
The invention relates to a phase-change expansion anti-cracking agent for concrete and a preparation method thereof, and the preparation method comprises the following steps: heating polyethylene glycol to a molten state, adding a mixed expansion agent into the molten state, uniformly mixing, adding graphite-phase carbon nitride, uniformly mixing, putting the mixed material into a vacuum drying oven, and carrying out vacuum adsorption, so as to obtain the phase-change expansion anti-cracking agent for concrete. The polyethylene glycol and the mixed expanding agent are adsorbed in the porous structure of the graphite phase carbon nitride, so that the phase change expansion anti-cracking agent for the concrete is prepared. Wherein the mass percentage ratio of the polyethylene glycol to the mixed expanding agent to the graphite phase carbon nitride is (35-49.5%): (49.5-60%): (1-5%). Different active expanding agents are compounded to form the mixed expanding agent, the calcium expanding agent is high in activity and hydration rate and mainly compensates for early-stage shrinkage of the concrete, meanwhile, M-type and S-type MgO expanding agents with different activities are added, shrinkage of the concrete in the middle and later stages is compensated, and therefore compensation shrinkage of the concrete in all stages is guaranteed, and the concrete quality is improved. And the cracking risk of the concrete is reduced.
本发明涉及一种混凝土用相变膨胀抗裂剂及其制备方法，上述制备方法包括如下步骤：将聚乙二醇加热至熔融态，向其中加入混合膨胀剂，混合均匀，再加入石墨相氮化碳，混合均匀，将混合物料放入真空干燥箱进行真空吸附，以使聚乙二醇及混合膨胀剂吸附于石墨相氮化碳的多孔结构中，从而制得一种混凝土用相变膨胀抗裂剂；其中，聚乙二醇、混合膨胀剂及石墨相氮化碳的质量百分比为(35～49.5％):(49.5～60％):(1～5％)。本发明中利用不同活性膨胀剂复配形成混合膨胀剂，钙质膨胀剂的活性较高，水化速率较快，主要补偿混凝土早期的收缩，同时加入M型和S型不同活性的MgO膨胀剂，补偿了混凝土中后期的收缩，从而保证对混凝土各个阶段的补偿收缩，降低了混凝土的开裂风险。
Phase change expansion anti-cracking agent for concrete and preparation method of phase change expansion anti-cracking agent
一种混凝土用相变膨胀抗裂剂及其制备方法
XIA RUIJIE (Autor:in) / XIANG FEI (Autor:in) / ZHANG ZHENJIE (Autor:in) / YIN DAODAO (Autor:in) / WANG HAI (Autor:in) / WANG HAILONG (Autor:in)
27.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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