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A platform for research: civil engineering, architecture and urbanism
Sprayed concrete admixture, ultrahigh-early-strength sprayed concrete and preparation method of ultrahigh-early-strength sprayed concrete
The invention provides a sprayed concrete admixture, ultrahigh-early-strength sprayed concrete and a preparation method of the ultrahigh-early-strength sprayed concrete, and relates to the technical field of building materials. The sprayed concrete admixture provided by the invention is prepared from the following components in parts by mass: 450 to 530 parts of silica fume, 180 to 240 parts of mineral powder, 20 to 30 parts of a water reducing agent, 150 parts of calcium nitrate, 30 to 50 parts of a crystal nucleus early strength agent, 10 to 20 parts of sodium gluconate, 10 to 20 parts of corn starch, 1 to 2 parts of building rubber powder and 20 to 40 parts of sodium carbonate. The sprayed concrete admixture provided by the invention can improve the impermeability, chemical erosion resistance and early strength of sprayed concrete. The invention provides ultrahigh early strength shotcrete. The early compressive strength of the shotcrete provided by the invention is more than 10MPa in 8h, more than 15MPa in 24h, more than 30MPa in 28d and less than 5%.
本发明提供了一种喷射混凝土掺合料和超高早强喷射混凝土及其制备方法，涉及建筑材料技术领域。本发明提供的喷射混凝土掺合料，包括以下质量份数的组分：硅灰450～530份，矿粉180～240份，减水剂20～30份，硝酸钙150份，晶核早强剂30～50份，葡萄糖酸钠10～20份，玉米淀粉10～20份，建筑胶粉1～2份，碳酸钠20～40份。本发明提供的喷射混凝土掺合料能够提高喷射混凝土的抗渗性、抗化学侵蚀性和早期强度。本发明提供了一种超高早强喷射混凝土，本发明提供的喷射混凝土早期抗压强度8h＞10MPa、24h＞15MPa，28d＞30MPa，回弹率为5％以下。
Sprayed concrete admixture, ultrahigh-early-strength sprayed concrete and preparation method of ultrahigh-early-strength sprayed concrete
The invention provides a sprayed concrete admixture, ultrahigh-early-strength sprayed concrete and a preparation method of the ultrahigh-early-strength sprayed concrete, and relates to the technical field of building materials. The sprayed concrete admixture provided by the invention is prepared from the following components in parts by mass: 450 to 530 parts of silica fume, 180 to 240 parts of mineral powder, 20 to 30 parts of a water reducing agent, 150 parts of calcium nitrate, 30 to 50 parts of a crystal nucleus early strength agent, 10 to 20 parts of sodium gluconate, 10 to 20 parts of corn starch, 1 to 2 parts of building rubber powder and 20 to 40 parts of sodium carbonate. The sprayed concrete admixture provided by the invention can improve the impermeability, chemical erosion resistance and early strength of sprayed concrete. The invention provides ultrahigh early strength shotcrete. The early compressive strength of the shotcrete provided by the invention is more than 10MPa in 8h, more than 15MPa in 24h, more than 30MPa in 28d and less than 5%.
本发明提供了一种喷射混凝土掺合料和超高早强喷射混凝土及其制备方法，涉及建筑材料技术领域。本发明提供的喷射混凝土掺合料，包括以下质量份数的组分：硅灰450～530份，矿粉180～240份，减水剂20～30份，硝酸钙150份，晶核早强剂30～50份，葡萄糖酸钠10～20份，玉米淀粉10～20份，建筑胶粉1～2份，碳酸钠20～40份。本发明提供的喷射混凝土掺合料能够提高喷射混凝土的抗渗性、抗化学侵蚀性和早期强度。本发明提供了一种超高早强喷射混凝土，本发明提供的喷射混凝土早期抗压强度8h＞10MPa、24h＞15MPa，28d＞30MPa，回弹率为5％以下。
Sprayed concrete admixture, ultrahigh-early-strength sprayed concrete and preparation method of ultrahigh-early-strength sprayed concrete
一种喷射混凝土掺合料和超高早强喷射混凝土及其制备方法
YIN LIPING (author) / HE LONGSHENG (author)
2024-11-12
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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