Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-alkalinity high-strength pervious concrete as well as preparation method and application thereof
The invention belongs to the technical field of concrete, and particularly relates to low-alkalinity high-strength pervious concrete as well as a preparation method and application thereof. According to the low-alkalinity and high-strength pervious concrete provided by the invention, the carbon mineralization cementing material and CO2 are subjected to a carbon mineralization reaction to generate calcium carbonate and silica gel, and the strength of the calcium carbonate generated by the carbon mineralization reaction is higher than that of cement hydration products C-S-H gel and calcium hydroxide in traditional pervious concrete formed by cement hydration consolidation; on the other hand, the alkalinity of calcium carbonate generated by the carbon mineralization reaction is low, so that the prepared pervious concrete has the characteristic of corrosion resistance, and the problem of corrosion damage caused by loss of calcium hydroxide in traditional pervious concrete can be avoided; moreover, the porosity of the pervious concrete blank is controlled, and the strength of the pervious concrete blank is further improved under the condition that the pervious performance of the pervious concrete blank is ensured, so that the pervious concrete with low alkalinity and high strength is prepared on the premise that the pervious performance is not reduced.
本发明属于混凝土技术领域，具体涉及一种低碱度高强度透水混凝土及其制备方法和应用。本发明提供的低碱度高强度透水混凝土中碳矿化胶凝材料与CO2发生碳矿化反应生成碳酸钙和硅胶，碳矿化反应生成的碳酸钙的强度高于传统以水泥水化固结形成的透水混凝土中水泥水化产物C‑S‑H凝胶和氢氧化钙的强度；另一方面碳矿化反应生成的碳酸钙碱度低，使得制备的透水混凝土具有抗溶蚀的特点，可以避免传统透水混凝土中由于氢氧化钙流失而造成溶蚀破坏问题；而且本发明控制透水混凝土坯体的空隙率，在保证其透水性能的情况下，进一步提高其强度，从而在不降低透水性能的前提下制备出低碱度高强度的透水混凝土。
Low-alkalinity high-strength pervious concrete as well as preparation method and application thereof
The invention belongs to the technical field of concrete, and particularly relates to low-alkalinity high-strength pervious concrete as well as a preparation method and application thereof. According to the low-alkalinity and high-strength pervious concrete provided by the invention, the carbon mineralization cementing material and CO2 are subjected to a carbon mineralization reaction to generate calcium carbonate and silica gel, and the strength of the calcium carbonate generated by the carbon mineralization reaction is higher than that of cement hydration products C-S-H gel and calcium hydroxide in traditional pervious concrete formed by cement hydration consolidation; on the other hand, the alkalinity of calcium carbonate generated by the carbon mineralization reaction is low, so that the prepared pervious concrete has the characteristic of corrosion resistance, and the problem of corrosion damage caused by loss of calcium hydroxide in traditional pervious concrete can be avoided; moreover, the porosity of the pervious concrete blank is controlled, and the strength of the pervious concrete blank is further improved under the condition that the pervious performance of the pervious concrete blank is ensured, so that the pervious concrete with low alkalinity and high strength is prepared on the premise that the pervious performance is not reduced.
本发明属于混凝土技术领域，具体涉及一种低碱度高强度透水混凝土及其制备方法和应用。本发明提供的低碱度高强度透水混凝土中碳矿化胶凝材料与CO2发生碳矿化反应生成碳酸钙和硅胶，碳矿化反应生成的碳酸钙的强度高于传统以水泥水化固结形成的透水混凝土中水泥水化产物C‑S‑H凝胶和氢氧化钙的强度；另一方面碳矿化反应生成的碳酸钙碱度低，使得制备的透水混凝土具有抗溶蚀的特点，可以避免传统透水混凝土中由于氢氧化钙流失而造成溶蚀破坏问题；而且本发明控制透水混凝土坯体的空隙率，在保证其透水性能的情况下，进一步提高其强度，从而在不降低透水性能的前提下制备出低碱度高强度的透水混凝土。
Low-alkalinity high-strength pervious concrete as well as preparation method and application thereof
一种低碱度高强度透水混凝土及其制备方法和应用
HUANG HUANGHUANG (Autor:in) / WANG FAZHOU (Autor:in) / LIU ZHICHAO (Autor:in)
13.05.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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