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Composite admixture, preparation method and application thereof, and tunnel sprayed concrete
The invention discloses a composite admixture, a preparation method and application thereof and tunnel shotcrete. The composite admixture comprises the following components in parts by weight: 5-8 parts of silica fume; 0.1 to 1 part of nano silicon dioxide; 2 to 5 parts of nano aluminum oxide; 0.1 to 2 parts of nano zirconium oxide; 5 to 15 parts of glass powder; 0.5 to 3 parts of silicate powder; and 1 to 3 parts of amino carboxylate. Through coordination and cooperation of various components in a specific proportion, the composite admixture can well give consideration to the working performance of a concrete mixture and the requirement for calcium ion corrosion resistance, the springback rate of sprayed concrete is reduced, meanwhile, different stages of cement hydration in the sprayed concrete are participated and promoted, and the performance of the sprayed concrete is improved. Free calcium ions in cement hydration products can be better cured, and the calcium ion crystallization separation performance in sprayed concrete under the water-rich stratum condition is reduced.
本发明公开了一种复合掺和料及其制备方法和应用以及隧道喷射混凝土，该复合掺和料按重量份数计包括以下组分：硅灰：5～8份；纳米二氧化硅0.1～1份；纳米氧化铝：2～5份；纳米氧化锆：0.1～2份；玻璃粉：5～15份；硅酸盐粉末：0.5～3份；以及氨基羧酸盐：1～3份。通过特定比例的多种组分的协调配合，使得该复合掺和料能较好地兼顾混凝土拌合物的工作性能和抗钙离子溶蚀的需求，在减少喷射混凝土回弹率的同时，在喷射混凝土中水泥水化的不同阶段均有参与和促进，能更好地固化水泥水化产物中的游离钙离子，减少了富水地层条件下喷射混凝土中钙离子结晶析出的性能。
Composite admixture, preparation method and application thereof, and tunnel sprayed concrete
The invention discloses a composite admixture, a preparation method and application thereof and tunnel shotcrete. The composite admixture comprises the following components in parts by weight: 5-8 parts of silica fume; 0.1 to 1 part of nano silicon dioxide; 2 to 5 parts of nano aluminum oxide; 0.1 to 2 parts of nano zirconium oxide; 5 to 15 parts of glass powder; 0.5 to 3 parts of silicate powder; and 1 to 3 parts of amino carboxylate. Through coordination and cooperation of various components in a specific proportion, the composite admixture can well give consideration to the working performance of a concrete mixture and the requirement for calcium ion corrosion resistance, the springback rate of sprayed concrete is reduced, meanwhile, different stages of cement hydration in the sprayed concrete are participated and promoted, and the performance of the sprayed concrete is improved. Free calcium ions in cement hydration products can be better cured, and the calcium ion crystallization separation performance in sprayed concrete under the water-rich stratum condition is reduced.
本发明公开了一种复合掺和料及其制备方法和应用以及隧道喷射混凝土，该复合掺和料按重量份数计包括以下组分：硅灰：5～8份；纳米二氧化硅0.1～1份；纳米氧化铝：2～5份；纳米氧化锆：0.1～2份；玻璃粉：5～15份；硅酸盐粉末：0.5～3份；以及氨基羧酸盐：1～3份。通过特定比例的多种组分的协调配合，使得该复合掺和料能较好地兼顾混凝土拌合物的工作性能和抗钙离子溶蚀的需求，在减少喷射混凝土回弹率的同时，在喷射混凝土中水泥水化的不同阶段均有参与和促进，能更好地固化水泥水化产物中的游离钙离子，减少了富水地层条件下喷射混凝土中钙离子结晶析出的性能。
Composite admixture, preparation method and application thereof, and tunnel sprayed concrete
复合掺和料及其制备方法和应用以及隧道喷射混凝土
JIANG YAJUN (author) / XIAO HUARONG (author) / CAO DANYANG (author)
2023-10-31
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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