Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Geopolymer self-compacting concrete, concrete product and preparation method thereof
The invention provides geopolymer self-compacting concrete, a concrete product and a preparation method thereof. The geopolymer self-compacting concrete is prepared from a cementing material, aggregate, an alkali activator, copolyformaldehyde fibers, water, curdlan and sodium gluconate, wherein the cementing material is a mixture of fly ash and aluminate cement, the aggregate is a mixture of sand and stones, the alkali activator is a mixture of solid sodium hydroxide and a sodium silicate solution, and more aluminum-rich gel is generated in a strong alkaline environment. According to the invention, the Young modulus of the aluminum-rich gel is obviously lower than that of hydrated calcium silicate, so that the elastic modulus of the self-compacting concrete is reduced on the premise of ensuring the compressive strength; by doping the polyformaldehyde fibers, initiation and expansion of cracks in the concrete are inhibited, and the anti-cracking performance is improved; and by adding curdlan, the self-compacting performance of the concrete is enhanced, and the fiber dispersing capacity is enhanced.
发明提供一种地聚合物自密实混凝土、混凝土制品及其制备方法。该地聚合物自密实混凝土包括胶凝材料、骨料、碱激发剂、共聚甲醛纤维、水、可得然胶和葡萄糖酸钠。所述胶凝材料为粉煤灰和铝酸盐水泥的混合物。所述骨料为砂和石子的混合物。所述碱激发剂为固体氢氧化钠和硅酸钠溶液的混合物。在强碱性环境下生成更多的富铝凝胶。由于富铝凝胶的杨氏模量明显低于水化硅酸钙的杨氏模量，在保证抗压强度的前提下，降低了自密实混凝土的弹性模量。通过掺加共聚甲醛纤维，抑制了混凝土内裂缝萌生与扩展，提高了抗开裂性能。通过掺加可得然胶，增强了混凝土的自密实性能，增强了纤维分散能力。
Geopolymer self-compacting concrete, concrete product and preparation method thereof
The invention provides geopolymer self-compacting concrete, a concrete product and a preparation method thereof. The geopolymer self-compacting concrete is prepared from a cementing material, aggregate, an alkali activator, copolyformaldehyde fibers, water, curdlan and sodium gluconate, wherein the cementing material is a mixture of fly ash and aluminate cement, the aggregate is a mixture of sand and stones, the alkali activator is a mixture of solid sodium hydroxide and a sodium silicate solution, and more aluminum-rich gel is generated in a strong alkaline environment. According to the invention, the Young modulus of the aluminum-rich gel is obviously lower than that of hydrated calcium silicate, so that the elastic modulus of the self-compacting concrete is reduced on the premise of ensuring the compressive strength; by doping the polyformaldehyde fibers, initiation and expansion of cracks in the concrete are inhibited, and the anti-cracking performance is improved; and by adding curdlan, the self-compacting performance of the concrete is enhanced, and the fiber dispersing capacity is enhanced.
发明提供一种地聚合物自密实混凝土、混凝土制品及其制备方法。该地聚合物自密实混凝土包括胶凝材料、骨料、碱激发剂、共聚甲醛纤维、水、可得然胶和葡萄糖酸钠。所述胶凝材料为粉煤灰和铝酸盐水泥的混合物。所述骨料为砂和石子的混合物。所述碱激发剂为固体氢氧化钠和硅酸钠溶液的混合物。在强碱性环境下生成更多的富铝凝胶。由于富铝凝胶的杨氏模量明显低于水化硅酸钙的杨氏模量，在保证抗压强度的前提下，降低了自密实混凝土的弹性模量。通过掺加共聚甲醛纤维，抑制了混凝土内裂缝萌生与扩展，提高了抗开裂性能。通过掺加可得然胶，增强了混凝土的自密实性能，增强了纤维分散能力。
Geopolymer self-compacting concrete, concrete product and preparation method thereof
一种地聚合物自密实混凝土、混凝土制品及其制备方法
HU SHAOWEI (Autor:in) / WANG YAMIN (Autor:in) / XUE XIANG (Autor:in) / QI HAO (Autor:in) / HU DENGXING (Autor:in) / YAO LIQIN (Autor:in) / ZHU DONG (Autor:in) / LI JIAPING (Autor:in)
10.12.2021
Patent
Elektronische Ressource
Chinesisch
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