Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Self-curing high-expansion fiber anti-cracking agent and preparation method thereof
The invention belongs to the field of building material concrete admixtures, and particularly relates to a self-curing type high-expansion fiber anti-cracking agent and a preparation method thereof. In percentage by weight, The self-curing type high-expansion fiber anti-cracking agent comprises the following raw materials: 0.1%-4% of modified polyvinyl alcohol fibers, 40%-59.9% of a multi-source composite expanding agent, 8%-15% of silica fume, 20%-35% of a siliceous waterproof agent, 5%-8% of a defoaming agent, 5%-8% of a water reducing agent and 2%-5% of sodium gluconate, wherein the sum of the raw materials is 100%. According to the invention, the modified polyvinyl alcohol fibers are adopted, the water absorption rate of the fibers is increased, meanwhile, the ultimate tensile strength of the fibers is increased, water absorbed by the fibers in the early stage is gradually released through negative pressure under the condition that the internal water concentration in the concrete hardening process is reduced, the problem that the water consumption for hydration of the expanding agent is insufficient is solved, the reaction of the expanding agent is further promoted, the expansion rate is increased, the expansion energy is increased, and concrete cracking is effectively inhibited.
本发明属于建筑材料混凝土外加剂领域，具体涉及一种自养护型高膨胀纤维抗裂剂及其制备方法，按照重量百分比计，原料包括改性聚乙烯醇纤维0.1％‑4％、多源复合型膨胀剂40％‑59.9％、硅灰8％‑15％、硅质防水剂20％‑35％、消泡剂5％‑8％、减水剂5％‑8％、葡萄糖酸钠2％‑5％，各原料总和为100％。本发明采用改性聚乙烯醇纤维进，提高纤维的吸水率，同时增加纤维的极限抗拉强度，纤维早期吸收的水分随混凝土硬化过程中内部水浓度减小的情况下，通过负压而逐渐释放，弥补膨胀剂水化用水量不足的问题，进一步促进膨胀剂反应，提高膨胀率，增加膨胀能，有效抑制混凝土开裂。
Self-curing high-expansion fiber anti-cracking agent and preparation method thereof
The invention belongs to the field of building material concrete admixtures, and particularly relates to a self-curing type high-expansion fiber anti-cracking agent and a preparation method thereof. In percentage by weight, The self-curing type high-expansion fiber anti-cracking agent comprises the following raw materials: 0.1%-4% of modified polyvinyl alcohol fibers, 40%-59.9% of a multi-source composite expanding agent, 8%-15% of silica fume, 20%-35% of a siliceous waterproof agent, 5%-8% of a defoaming agent, 5%-8% of a water reducing agent and 2%-5% of sodium gluconate, wherein the sum of the raw materials is 100%. According to the invention, the modified polyvinyl alcohol fibers are adopted, the water absorption rate of the fibers is increased, meanwhile, the ultimate tensile strength of the fibers is increased, water absorbed by the fibers in the early stage is gradually released through negative pressure under the condition that the internal water concentration in the concrete hardening process is reduced, the problem that the water consumption for hydration of the expanding agent is insufficient is solved, the reaction of the expanding agent is further promoted, the expansion rate is increased, the expansion energy is increased, and concrete cracking is effectively inhibited.
本发明属于建筑材料混凝土外加剂领域，具体涉及一种自养护型高膨胀纤维抗裂剂及其制备方法，按照重量百分比计，原料包括改性聚乙烯醇纤维0.1％‑4％、多源复合型膨胀剂40％‑59.9％、硅灰8％‑15％、硅质防水剂20％‑35％、消泡剂5％‑8％、减水剂5％‑8％、葡萄糖酸钠2％‑5％，各原料总和为100％。本发明采用改性聚乙烯醇纤维进，提高纤维的吸水率，同时增加纤维的极限抗拉强度，纤维早期吸收的水分随混凝土硬化过程中内部水浓度减小的情况下，通过负压而逐渐释放，弥补膨胀剂水化用水量不足的问题，进一步促进膨胀剂反应，提高膨胀率，增加膨胀能，有效抑制混凝土开裂。
Self-curing high-expansion fiber anti-cracking agent and preparation method thereof
一种自养护型高膨胀纤维抗裂剂及其制备方法
WU XUAN (Autor:in) / YANG ZHENYANG (Autor:in) / LYU JIANHUA (Autor:in) / CHENG SHUJIE (Autor:in) / ZHAN WEI (Autor:in)
12.11.2021
Patent
Elektronische Ressource
Chinesisch
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