Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Micro-expansion commercial concrete and preparation method thereof
The invention provides micro-expansive commercial concrete and a preparation method thereof.The micro-expansive commercial concrete is prepared from broken stone, sand, cement, an admixture, an anti-freezing agent, an expanding agent, chitosan phase change microcapsules, a blocking agent and water.The preparation method of the blocking agent comprises the steps that S1, chitosan with the molecular weight being 150000-20000 and the deacetylation degree being 90%-92% is adopted for wrapping gypsum so as to block pores in the gypsum, and then the gypsum is dried; s2, adding a cross-linking agent in the preparation process of S1, and using a strong alkali and weak acid salt capable of providing Ca < 2 + > as a chitosan precipitation agent to consume active functional groups of chitosan, and S3, coating the surface of the chitosan film with a layer of gypsum by virtue of adsorbed water on the surface of the chitosan film obtained in S2, so as to protect the chitosan film. According to the cement stone micro-crack water-encountering self-blocking material, through the use of the blocking agent, after water is sprayed on the surface of formed concrete, the blocking agent can be expanded, so that small cracks in the concrete are blocked, and the strength of the concrete is further improved.
本发明提供了一种微膨胀商品混凝土及其制备方法，包括碎石，砂，水泥，掺合料，防冻剂、膨胀剂，壳聚糖相变微胶囊，封堵剂，水，所述封堵剂的制备方法为：S1、采用分子量为15～20万，脱乙酰度为90％～92％的壳聚糖对石膏进行包裹，以封堵石膏上的孔隙，S2、在制备S1的过程中添加交联剂，并采用可提供Ca2+的强碱弱酸盐作为壳聚糖析出剂，以消耗壳聚糖的活性官能团，S3、依靠从S2中得到的壳聚糖膜表面的吸附水，将壳聚糖薄膜表面再包裹一层石膏，对壳聚糖膜进行保护，得到水泥石微裂缝遇水自封堵材料，通过封堵剂的使用，将水洒在成型的混凝土表面后，能够使封堵剂膨胀，从而将混凝土内部的细小裂缝堵住，进而提高混凝土的强度。
Micro-expansion commercial concrete and preparation method thereof
The invention provides micro-expansive commercial concrete and a preparation method thereof.The micro-expansive commercial concrete is prepared from broken stone, sand, cement, an admixture, an anti-freezing agent, an expanding agent, chitosan phase change microcapsules, a blocking agent and water.The preparation method of the blocking agent comprises the steps that S1, chitosan with the molecular weight being 150000-20000 and the deacetylation degree being 90%-92% is adopted for wrapping gypsum so as to block pores in the gypsum, and then the gypsum is dried; s2, adding a cross-linking agent in the preparation process of S1, and using a strong alkali and weak acid salt capable of providing Ca < 2 + > as a chitosan precipitation agent to consume active functional groups of chitosan, and S3, coating the surface of the chitosan film with a layer of gypsum by virtue of adsorbed water on the surface of the chitosan film obtained in S2, so as to protect the chitosan film. According to the cement stone micro-crack water-encountering self-blocking material, through the use of the blocking agent, after water is sprayed on the surface of formed concrete, the blocking agent can be expanded, so that small cracks in the concrete are blocked, and the strength of the concrete is further improved.
本发明提供了一种微膨胀商品混凝土及其制备方法，包括碎石，砂，水泥，掺合料，防冻剂、膨胀剂，壳聚糖相变微胶囊，封堵剂，水，所述封堵剂的制备方法为：S1、采用分子量为15～20万，脱乙酰度为90％～92％的壳聚糖对石膏进行包裹，以封堵石膏上的孔隙，S2、在制备S1的过程中添加交联剂，并采用可提供Ca2+的强碱弱酸盐作为壳聚糖析出剂，以消耗壳聚糖的活性官能团，S3、依靠从S2中得到的壳聚糖膜表面的吸附水，将壳聚糖薄膜表面再包裹一层石膏，对壳聚糖膜进行保护，得到水泥石微裂缝遇水自封堵材料，通过封堵剂的使用，将水洒在成型的混凝土表面后，能够使封堵剂膨胀，从而将混凝土内部的细小裂缝堵住，进而提高混凝土的强度。
Micro-expansion commercial concrete and preparation method thereof
一种微膨胀商品混凝土及其制备方法
ZHAO JUNPING (Autor:in) / WU HUIXIONG (Autor:in) / ZHU JIJIE (Autor:in) / TAN JUNJIE (Autor:in)
20.02.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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